Antarctic Biodiversity

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Antarctic Biodiversity

Antarctica is often imagined as a largely lifeless continent of ice, yet it supports a distinctive and scientifically important range of terrestrial, freshwater and marine ecosystems. Most terrestrial life is concentrated in the comparatively small areas of exposed rock, soil, lakes, streams and vegetation that remain free of permanent ice. The surrounding Southern Ocean supports much richer marine ecosystems containing phytoplankton, krill, fish, squid, benthic invertebrates, penguins, seabirds, seals and whales.

Much Antarctic biodiversity is highly specialized for extreme environmental conditions. Organisms may face freezing temperatures, long periods of darkness, strong ultraviolet radiation, severe dryness, seasonal food shortages and extensive sea-ice cover. Isolation over evolutionary time has also produced distinctive biological communities and high levels of endemism, particularly among terrestrial microorganisms and marine benthic organisms.

Antarctic biodiversity is increasingly changing as climate warming, sea-ice loss, oceanographic shifts and expanding human activity alter habitats. These pressures interact with fisheries, tourism, pollution, invasive species, wildlife disease and gaps in environmental protection. At the same time, satellites, environmental DNA, genomics, automated instruments and long-term ecological monitoring are revealing biological diversity that was previously difficult to observe.

Terrestrial Biodiversity

Only a small fraction of Antarctica is ice-free, but these areas contain most of the continent's visible terrestrial ecosystems. Mosses, lichens, algae, fungi, microorganisms and small invertebrates occupy soils, rocky surfaces, meltwater areas, coastal zones and other favorable microhabitats.

Antarctic mosses and lichens are particularly well adapted to freezing and dehydration. Some grow extremely slowly and survive environmental conditions that would prevent most vascular plants from persisting. Their distributions are influenced by temperature, latitude, terrain, moisture, bird colonies, geothermal activity and other local environmental conditions.

Terrestrial animals are generally small. Nematodes, tardigrades, rotifers, springtails and mites make up much of Antarctica's land-based animal diversity. These organisms play important roles in decomposition, nutrient cycling and soil ecosystem functioning.

Bird and seal colonies can dramatically affect terrestrial biodiversity. Nutrients transported from the ocean through guano and other biological material fertilize otherwise nutrient-poor landscapes. Areas surrounding colonies can consequently support richer communities of mosses, lichens, microbes and invertebrates.

Climate warming may expand ice-free habitat in some areas. This could provide additional space for native species but may also increase connectivity between previously isolated ecosystems, encourage biological invasions and contribute to ecological homogenization.

Microbial and Freshwater Ecosystems

Microorganisms constitute a large proportion of Antarctica's biological diversity. Bacteria, archaea, fungi, algae and other microorganisms inhabit soils, lakes, snow, sea ice, marine sediments and environments beneath ice shelves.

Antarctic soils that appear barren can contain surprisingly complex microbial communities. These organisms contribute to carbon cycling, nitrogen cycling, decomposition and soil formation. Their composition varies according to temperature, moisture, salinity, pH, nutrient availability and other environmental factors.

Antarctic lakes also support distinctive biological communities. Some remain permanently covered by ice, while others undergo seasonal changes associated with meltwater and temperature. Microbial mats, plankton and microorganisms form relatively simple but ecologically important food webs.

Research in ice-covered lakes has revealed previously hidden microbial ecosystems, demonstrating how much Antarctic biodiversity remains poorly documented. Genomic and metagenomic studies are similarly revealing large numbers of microorganisms whose ecological functions were previously inaccessible to researchers.

Because many Antarctic microorganisms occur within narrow environmental ranges, warming and changing moisture conditions could substantially alter microbial communities and the ecosystem processes they support.

Southern Ocean Biodiversity

The Southern Ocean contains some of the world's most distinctive marine ecosystems. Its waters support phytoplankton, zooplankton, krill, fish, squid, seabirds, penguins, seals and whales, while the seafloor contains rich communities of sponges, echinoderms, worms, crustaceans, molluscs and other invertebrates.

Isolation, glacial cycles, ocean circulation and millions of years of evolution have produced unusual marine adaptations and high levels of endemism. Some Antarctic benthic organisms grow extremely slowly and may live for decades or centuries.

Deep-sea expeditions have repeatedly discovered species previously unknown to science. Large parts of the Southern Ocean remain poorly sampled, especially deep-water habitats, meaning current inventories almost certainly underestimate Antarctic marine biodiversity.

Marine communities vary greatly among regions and depths. The Ross Sea, Weddell Sea, Antarctic Peninsula, Scotia Sea, Amundsen Sea and other regions contain distinct ecological assemblages shaped by currents, sea ice, productivity, seafloor conditions and evolutionary history.

Antarctic Krill and the Food Web

Antarctic krill are among the most ecologically important animals in the Southern Ocean. They consume phytoplankton and other microscopic food while serving as prey for penguins, flying seabirds, fish, seals and baleen whales.

Because so many predators depend on krill, changes in krill abundance or distribution can influence much of the Antarctic food web. Long-term observations indicate that krill distributions have changed in some regions as ocean temperatures and sea-ice conditions have shifted.

Sea ice is particularly important during parts of the krill life cycle. Algae growing within and beneath sea ice provide food and habitat, especially for young krill during winter. Declining or changing sea ice can therefore affect recruitment, overwinter survival and regional krill abundance.

Krill also influence global biogeochemical cycles. By feeding on phytoplankton and producing sinking organic material, they help transfer carbon into deeper ocean waters. They recycle iron and other nutrients and connect microscopic primary producers with large marine predators.

Commercial harvesting adds another pressure. Expanding krill fisheries can overlap geographically with feeding areas used by penguins, seals and whales, creating an important challenge for ecosystem-based fisheries management.

Penguins, Seabirds, Seals and Whales

Antarctica's large marine predators are among its most visible wildlife and also provide useful indicators of ecosystem change.

Emperor penguins depend heavily on stable sea ice for breeding. Recent years of exceptionally low Antarctic sea ice have caused breeding failures at multiple colonies, and some regional populations have declined more rapidly than earlier projections suggested.

Adélie penguins are also strongly associated with sea ice, although responses differ among regions. Gentoo penguins have expanded into some warming parts of the Antarctic Peninsula, while chinstrap penguins remain highly dependent on krill during the breeding season.

Long-term monitoring of penguins provides information about changing prey availability, oceanographic conditions and sea-ice dynamics. Satellite imagery increasingly allows scientists to estimate colony size and detect population changes across areas that are difficult to survey from the ground.

Antarctic seals respond differently to changing sea-ice conditions according to species and feeding ecology. Weddell seals depend on sea-ice habitats, while Antarctic fur seals, elephant seals and other species respond to changing prey distributions and ocean conditions in different ways.

Whales are also closely connected to Antarctic food webs. Several baleen whale populations are recovering from historical commercial whaling, increasing their consumption of krill. This recovery is an important conservation success but also adds another dimension to the management of commercial krill fisheries.

Climate Change and Sea Ice

Climate change is becoming one of the dominant forces shaping Antarctic biodiversity. Ecological responses vary widely because Antarctica contains enormous regional differences in temperature, sea ice, ocean circulation and habitat.

Warming can change terrestrial ecosystems by increasing meltwater, extending biological growing periods and exposing new ice-free land. Satellite observations have documented increasing vegetation cover in parts of the Antarctic Peninsula.

Sea-ice changes affect organisms across multiple trophic levels. Sea-ice algae and microorganisms support krill and other zooplankton, which in turn sustain fish, penguins, seals and whales. Reduced or altered sea-ice duration can therefore propagate through entire food webs.

Ocean warming may shift species distributions southward or alter suitable habitat. Ocean acidification presents additional risks, especially for organisms that build calcium carbonate shells or skeletons and for species whose reproduction is sensitive to changing seawater chemistry.

The consequences will not be uniform. Some species may temporarily expand into newly suitable habitat while others lose essential environmental conditions. Interactions among warming, sea-ice decline, food availability, invasive species and human activities make long-term outcomes difficult to predict.

Human Impacts

Antarctica remains comparatively remote, but human activity is increasing.

Scientific stations, vehicles, infrastructure and field operations can disturb fragile soils and vegetation. Research has shown that ecological impacts can persist for long periods because biological recovery in cold Antarctic environments is exceptionally slow.

Tourism has also expanded rapidly. Visitors can disturb wildlife, trample vegetation and unintentionally transport seeds, microorganisms or small invertebrates between locations. Biosecurity measures are therefore increasingly important.

Marine pollution has reached Antarctica despite its isolation. Plastics and microplastics have been detected in seawater, sediments, sea ice and organisms. Floating plastic debris can also provide surfaces for organisms that might otherwise have limited opportunities to reach Antarctic waters.

Fishing creates additional ecosystem pressures. Krill fisheries overlap with predators dependent upon krill, while toothfish fisheries may influence food-web relationships involving other fish and predators.

Wildlife pathogens and emerging diseases are another growing conservation concern. Increased movement of people, animals and materials can create new opportunities for pathogens to reach Antarctic ecosystems.

Biodiversity Monitoring and Technology

Monitoring Antarctic biodiversity is unusually difficult because of the continent's enormous size, extreme climate and logistical challenges. Traditional field surveys therefore leave large geographic and taxonomic gaps.

Satellite remote sensing has transformed Antarctic ecology. Researchers can now map vegetation, identify penguin colonies, monitor sea ice and track environmental changes across areas that would be extremely difficult to survey consistently on the ground.

Environmental DNA, or eDNA, provides another major advance. Organisms release genetic material into seawater, soil and other environments. Researchers can collect environmental samples and identify many species without needing to capture or visually observe them.

DNA metabarcoding has been used to study fish, zooplankton, benthic organisms and terrestrial communities. Automated seawater sampling could eventually allow ships to collect biodiversity information continuously across large portions of the Southern Ocean.

Genomic techniques are revealing previously unknown microbial diversity, while underwater cameras, acoustic instruments, autonomous vehicles, gliders and animal-borne sensors provide complementary information about habitats and animal behavior.

Coordinating these technologies with long-term monitoring programs is essential because current Antarctic datasets remain concentrated in a limited number of regions and frequently emphasize conspicuous animals such as penguins and marine mammals.

Conservation and Protected Areas

Antarctic conservation operates through a network of international agreements, protected areas, environmental regulations and fisheries-management systems.

Antarctic Specially Protected Areas protect locations considered particularly important for environmental, scientific or historical reasons. However, research has repeatedly found that the existing protected-area network does not represent all of Antarctica's ecological regions or biological diversity.

This problem is especially significant on land because most terrestrial biodiversity occurs within the small fraction of Antarctica that is ice-free. Protecting representative examples of these habitats will become increasingly important as warming, tourism, infrastructure and invasive species pressures increase.

Marine protected areas are another major conservation tool. The Southern Ocean contains biologically important habitats ranging from krill feeding grounds to highly diverse seafloor ecosystems. Spatial analyses and genetic studies can help identify areas important for species diversity, ecological connectivity and long-term resilience.

The Commission for the Conservation of Antarctic Marine Living Resources uses ecosystem monitoring to track penguins, seabirds, seals and other indicators alongside fisheries and environmental conditions. Such monitoring is intended to support management that protects ecosystem structure rather than treating harvested species independently.

Future conservation will increasingly need to anticipate ecological change rather than simply protect historical distributions. Climate refuges, connectivity corridors, genetic diversity and changing species ranges may all become more important considerations.

Knowledge Gaps and Future Research

Despite more than a century of scientific exploration, large gaps remain in knowledge of Antarctic biodiversity.

Research has historically been concentrated around accessible stations, the Antarctic Peninsula and a relatively small number of charismatic species. Deep-sea environments, microorganisms, terrestrial invertebrates and many remote regions remain comparatively poorly documented.

Improved biodiversity inventories are needed to determine what species are present, where they occur and how their distributions are changing. Long-term monitoring is necessary to distinguish natural variability from persistent ecological change.

Future research will increasingly combine conventional field biology with satellite observations, environmental DNA, genomics, autonomous instruments and ecosystem modelling.

Because Antarctica is experiencing simultaneous climatic, biological and human pressures, understanding interactions among these forces may be more important than studying individual threats separately.

Conclusion

Antarctica contains far more biological diversity than its ice-covered landscape might suggest. Microorganisms, mosses, lichens and tiny invertebrates dominate terrestrial ecosystems, while the Southern Ocean supports exceptionally rich food webs extending from phytoplankton and krill to fish, penguins, seals and whales. Its seafloor contains some of the planet's least explored and most distinctive marine communities.

Climate change is already altering sea ice, vegetation, species distributions, predator populations and ecological processes. Fisheries, tourism, pollution, infrastructure, invasive species and disease add additional pressures.

At the same time, new technologies are rapidly improving scientists' ability to document Antarctic life. Environmental DNA, genomics, satellites, autonomous instruments and coordinated monitoring provide an increasingly detailed picture of how these ecosystems function and change.

Protecting Antarctic biodiversity will require representative protected areas, ecosystem-based fisheries management, strong biosecurity, long-term scientific monitoring and international cooperation. Because ecological change is accelerating, conservation strategies will also need to protect not only the biodiversity that exists today but the ecological processes and connectivity that allow Antarctic ecosystems to persist in a changing world.

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General Antarctic Biodiversity, Ecology & Biogeography

Ecological processes shaping Antarctic terrestrial biodiversity change

| Melodie A. McGeoch et al. | Nature Reviews Biodiversity | 7 January 2026 Antarctica's unusual terrestrial biodiversity is shaped by strong environmental filtering, dispersal, adaptation, species interactions and chance, providing several possible pathways for biodiversity change as the continent warms.

From tsunamis to sheathbills: celebrating a successful season South

| British Antarctic Survey | British Antarctic Survey | 2026 Recent ecosystem research combines krill surveys with penguin, seal and whale monitoring and investigates avian influenza and unexplained marine-organism mortality.

Antarctic Peninsula Region of the Southern Ocean: Oceanography and Ecology

| Eugene G. Morozov, Mikhail V. Flint and Vassily A. Spiridonov, eds. | Springer | 2021 This research synthesis covers the Antarctic Peninsula and Weddell Sea's oceanography, phytoplankton, zooplankton, benthos, fish and other ecological components.

Living environment

| Australian Government | Australia State of the Environment | 2021 Antarctica's terrestrial biodiversity is dominated by microorganisms and small invertebrates, many endemic and restricted to rare ice-free soils, lakes and vegetation patches.

The origin of the Southern Ocean marine fauna

| Andrew Clarke and J. Alistair Crame | British Antarctic Survey / Geological Society of London | 18 September 2018 Geological isolation and environmental change helped produce the unusual modern Southern Ocean fauna, much of which evolved within the Antarctic region over millions of years.

Antarctic Marine Biodiversity – What Do We Know About the Distribution of Life in the Southern Ocean?

| Huw J. Griffiths | PLOS ONE | 2 August 2010 More than a million occurrence records demonstrate extraordinary Southern Ocean diversity while exposing severe geographical and taxonomic sampling biases, particularly in deep water.

Antarctic marine biodiversity — What do we know about the distribution of life in the Southern Ocean?

| Huw J. Griffiths | British Antarctic Survey | 2010 The Census of Antarctic Marine Life and related databases provide a foundation for mapping thousands of Southern Ocean species and identifying major knowledge gaps.

Biodiversity and ecosystem functioning in terrestrial habitats of Antarctica

| Diana H. Wall | Antarctic Science | 18 November 2005 Antarctic soil organisms contribute to decomposition, carbon cycling, nutrient turnover and other ecosystem processes that may respond strongly to multiple global environmental changes.

Antarctic wildlife

| British Antarctic Survey | British Antarctic Survey | n.d. Antarctica's marine environment supports penguins, seals, whales, seabirds and abundant invertebrates whose life histories are closely linked to sea ice and seasonal productivity.

Behavioural ecology research in Antarctica

| British Antarctic Survey | British Antarctic Survey | n.d. Research examines krill, whales, penguins, seals, albatrosses and other predators to understand foraging, migration and interactions between wildlife, fisheries and changing ecosystems.

Biodiversity of Antarctic and Subantarctic Ecosystems

| Various editors | Frontiers in Ecology and Evolution | n.d. This research collection covers diversification, glacial history, connectivity, climate responses, species distributions, biological invasions, conservation and governance across Antarctic ecosystems.

Project 3: Ecosystems

| Antarctica New Zealand | Antarctic Science Platform | n.d. New Zealand's Ross Sea ecosystem research links environmental change with primary productivity, krill, silverfish, penguins, whales, benthos and terrestrial biodiversity.

Science at island stations

| British Antarctic Survey | British Antarctic Survey | n.d. Research on South Georgia and the South Orkney Islands tracks fish, krill, plankton, seals, penguins and albatrosses as climate and fisheries reshape Southern Ocean ecosystems.

Climate Change, Sea Ice & Ecosystem Change

Antarctic terrestrial and freshwater biological responses to climate change

| Stef Bokhorst, Peter Convey, Kevin K. Newsham and Uffe Nielsen | Antarctic Science | 23 June 2026 This synthesis examines how warming, altered precipitation and other climate pressures are changing Antarctic terrestrial and freshwater organisms, ecological interactions and ecosystem processes.

Climate change and Antarctic terrestrial ecological processes

| Melodie A. McGeoch et al. | British Antarctic Survey | 7 January 2026 A theory-based assessment evaluates how environmental filtering, dispersal, adaptation and interactions could determine the future composition of Antarctic terrestrial ecosystems.

Antarctic biodiversity and environmental change

| Nature Index | Nature | 2026 An overview connects warming, deglaciation, sea-ice change and expanding human activity with changes in Antarctic plants, microbes, krill, fish and higher predators.

Emergent climate change signals within Antarctic sea ice and associated ecosystems

| Various authors | Nature Climate Change | 2026 Climate-driven changes in Antarctic sea ice, phytoplankton, krill, fish and penguins are expected to emerge at different times, with particularly strong regional and seasonal differences.

Modelling krill growth, reproduction, and metabolism to predict life-history responses to environmental change

| Various authors | ICES Journal of Marine Science | 29 August 2025 A bioenergetic model links food intake and energy allocation to krill growth and reproduction, allowing ecological responses to environmental change to be explored.

Seals study shows melting sea ice is shaping their future

| British Antarctic Survey | British Antarctic Survey | 18 June 2025 Five decades of monitoring at Signy Island reveal substantial long-term declines in some Antarctic seal populations associated with changing sea-ice habitat.

Temporary Absence of Warming in the Northern Weddell Sea Validates Expected Responses of Antarctic Seals to Sea Ice Change

| M. J. Dunn et al. | Global Change Biology | 18 June 2025 Nearly five decades of observations show contrasting responses of fur, elephant and Weddell seals to changing sea-ice conditions around the South Orkney Islands.

Untangling the complexities of larval Antarctic krill overwintering success under climate change

| Devi Veytia et al. | ICES Journal of Marine Science | 18 April 2025 Research examines the interacting effects of sea ice, food and environmental variability on the ability of larval krill to survive the Antarctic winter.

Antarctic krill habitat suitability variation in the Southern Ocean over 20 years

| Yiyang Tan and Yan Bai | Frontiers in Marine Science | 21 February 2025 Twenty years of environmental observations indicate substantial regional shifts in krill habitat suitability associated with sea-ice timing and phytoplankton bloom dynamics.

Antarctic krill habitat suitability changes: Historical trends and future projections under climate scenarios

| Meng Cui et al. | Marine Pollution Bulletin | 2025 Models project major regional changes in Antarctic krill habitat, with high-emission scenarios producing severe losses while lower-emission pathways allow partial habitat recovery.

Population changes in a Southern Ocean krill predator point towards regional Antarctic sea ice declines

| Matthew Germishuizen, Marcello Vichi and Els Vermeulen | Scientific Reports | 28 October 2024 Changes in southern right whale condition and reproduction provide indirect evidence of ecosystem changes affecting krill production and Antarctic sea-ice conditions.

New avenues for potentially seeking microbial responses to climate change beneath Antarctic ice shelves

| Aitana Llorenç-Vicedo et al. | mSphere | 26 April 2024 Genomic approaches offer new ways to determine how poorly known microbial ecosystems beneath Antarctic ice shelves respond to environmental change.

Emperor penguin colonies in Antarctica suffer as sea-ice diminishes

| British Antarctic Survey | British Antarctic Survey | 25 April 2024 Satellite observations found breeding failures at numerous emperor penguin colonies following exceptionally low Antarctic sea ice during 2023.

Benthic functionality under climate-induced environmental changes offshore on the Antarctic Peninsula continental shelf

| Najib Mohd Nasir, David K. A. Barnes and Wan Mohd Rauhan Wan Hussin | Marine Environmental Research | February 2024 Functional-group analysis shows how substrate and environmental conditions structure Antarctic Peninsula benthic communities and influence their vulnerability to climate change.

Climate change affects male and female Antarctic fur seal habitat differently

| Various authors | Global Change Biology | 2024 Climate projections suggest that male and female Antarctic fur seals may experience different changes in suitable habitat because their foraging ecology differs substantially.

Climate-change risks to penguins from cumulative environmental and human pressures

| Various authors | Global Change Biology | 2024 A global assessment identifies chinstrap penguins among species facing particularly high combined pressure from climate change, fisheries and other human activities.

Prokaryotic richness and diversity increased during Holocene glacier retreat and onset of an Antarctic lake

| Various authors | Communications Earth & Environment | 2024 Ancient environmental DNA records how bacterial and archaeal diversity expanded as glacier retreat transformed an Antarctic landscape into a lake ecosystem.

Sustained greening of the Antarctic Peninsula observed from satellites

| Thomas P. Roland et al. | Nature Geoscience | 2024 Satellite records indicate vegetation cover on the Antarctic Peninsula expanded substantially between 1986 and 2021, illustrating a terrestrial ecological response to regional warming.

Record low 2022 Antarctic sea ice led to catastrophic breeding failure of emperor penguins

| Peter T. Fretwell, Aude Boutet and Norman Ratcliffe | Communications Earth & Environment | 24 August 2023 Satellite observations link unprecedented Bellingshausen Sea ice loss with widespread emperor penguin breeding failure during the 2022 season.

Potential macroalgal expansion and blue carbon gains with northern Antarctic Peninsula glacial retreat

| Dolores Deregibus et al. | Marine Environmental Research | July 2023 Retreating glaciers expose new coastal habitat that can be colonized by macroalgae, potentially increasing biodiversity and coastal blue-carbon storage.

The Impact of Sea Ice Cover on Microbial Communities in Antarctic Shelf Sediments

| Marwa Baloza et al. | Microorganisms | 14 June 2023 Antarctic shelf sediment microbial communities differ according to sea-ice conditions, linking changing ice regimes to benthic microbial ecosystem functioning.

Climate change impacts on Antarctic krill behaviour and population dynamics

| So Kawaguchi et al. | Nature Reviews Earth & Environment | 2023 Climate warming, declining sea ice and habitat shifts are changing Antarctic krill distribution, recruitment and behaviour with potentially large consequences for predators and fisheries.

Climate drivers of Southern Ocean phytoplankton community composition and potential impacts on higher trophic levels

| Kristen M. Krumhardt et al. | Frontiers in Marine Science | 11 August 2022 Climate-driven shifts between diatoms and smaller phytoplankton could propagate upward to krill, copepods, fish, seabirds and marine mammals.

Factors influencing sea-ice algae abundance, community composition, and distribution in the marginal ice zone of the Southern Ocean during winter

| Various authors | Deep Sea Research Part I | July 2022 Winter observations demonstrate that Antarctic sea-ice algae and associated bacterial communities remain active and contribute importantly to food-web and carbon-cycle processes.

Report highlights changes in Antarctica

| British Antarctic Survey | British Antarctic Survey | 2022 Antarctic ecosystems are already responding to climate change through effects on krill, penguins, whales, seals and terrestrial species while non-native organisms pose growing risks.

Climate Projections for the Southern Ocean Reveal Impacts in the Marine Microbial Communities Following Increases in Sea Surface Temperature

| Various authors | Frontiers in Marine Science | 2021 Climate-model projections suggest substantial future changes in Southern Ocean bacterial and archaeal diversity as sea-surface temperatures increase during the twenty-first century.

Antarctic krill take refuge from climate change

| British Antarctic Survey | British Antarctic Survey | 22 September 2020 Long-term krill observations suggest that relatively stable Indian and Pacific sectors of the Southern Ocean may function as refuges as Atlantic-sector habitats deteriorate.

Antarctic Futures: An Assessment of Climate-Driven Changes in Ecosystem Structure, Function, and Service Provisioning in the Southern Ocean

| Various authors | Annual Review of Marine Science | 2020 This broad assessment traces how climate change may alter Southern Ocean primary production, food webs, species distributions, biogeochemistry and ecosystem services.

Marine Ecosystem Assessment for the Southern Ocean: Birds and Marine Mammals in a Changing Climate

| Various authors | Frontiers in Ecology and Evolution | 2020 A broad assessment examines penguins, flying seabirds, whales and seals as ecosystem indicators and evaluates climate change, fisheries, pollution, disease and disturbance pressures.

Marine ecosystem assessment for the Southern Ocean: birds and marine mammals in a changing climate

| Various authors | British Antarctic Survey | 2020 Southern Ocean top predators connect food webs across vast areas and provide useful indicators of changing prey resources, climate conditions and human pressures.

Krill's influence on CO2 and global climate

| British Antarctic Survey | British Antarctic Survey | 18 October 2019 Antarctic krill contribute to biological carbon transport by consuming phytoplankton and producing rapidly sinking, carbon-rich material that carries organic matter into deeper waters.

New study looks at risk to Antarctic marine life in future

| British Antarctic Survey | British Antarctic Survey | 17 January 2019 A climate-risk assessment of 27 Antarctic marine species identifies sea-ice-dependent animals as particularly vulnerable while some open-water and seafloor species may gain habitat.

Climate change drives expansion of Antarctic ice-free habitat

| Jasmine R. Lee et al. | Nature | 28 June 2017 Modelling suggests climate change could substantially expand and connect Antarctica's rare ice-free habitats, potentially promoting invasive species and biological homogenization.

Southern Ocean Phytoplankton in a Changing Climate

| Various authors | Frontiers in Marine Science | 2017 Southern Ocean phytoplankton support Antarctic food webs and climate regulation but may change as warming, acidification, sea-ice decline and ocean circulation alter their environment.

Large changes ahead for Antarctic marine ecosystems

| Australian Antarctic Program | Australian Antarctic Program | 14 July 2014 Southern Ocean experts conclude that changing sea ice, temperature and other habitats are likely to restructure microbes, krill, fish, seabirds and marine-mammal communities.

Antarctic marine ecosystems and climate change

| Various authors | Global Change Biology | 2014 A comprehensive review evaluates projected climate effects on Antarctic microbes, plankton, krill, fish, cephalopods, seabirds, mammals and benthic communities.

Warming Antarctic seas likely to impact on krill habitats

| British Antarctic Survey | British Antarctic Survey | 21 August 2013 Ecological modelling suggests continued Southern Ocean warming could substantially reduce suitable Antarctic krill growth habitat, especially around South Georgia.

Climate change affects marine animals on Antarctica's seabed

| British Antarctic Survey | British Antarctic Survey | 2011 Experiments on Antarctic bryozoans show how changing temperatures can affect growth, carbon storage and habitat-forming organisms within seafloor ecosystems.

Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica

| Various authors | Proceedings of the National Academy of Sciences | 2011 Long-term Antarctic Peninsula observations link changes in penguin populations more closely to altered krill availability than to a simple distinction between ice-loving and ice-avoiding species.

Microbial responses to experimental sea-ice formation

| Various authors | Journal of Experimental Marine Biology and Ecology | 29 November 1993 Laboratory sea-ice formation experiments show algae and bacteria becoming concentrated within newly forming Antarctic ice, helping explain the development of productive sea-ice communities.

Antarctic sea ice in crisis

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic sea ice provides habitat and feeding opportunities for phytoplankton, krill, fish, penguins, seals and whales, making recent record-low ice conditions ecologically significant.

Terrestrial Plants, Lichens, Mosses & Invertebrates

Lichens and Health—Trends and Perspectives for the Study of Biodiversity in the Antarctic Ecosystem

| Tatiana Prado et al. | Journal of Fungi | 4 March 2025 A review examines Antarctic lichen biodiversity, ecology, conservation, climate responses, symbioses and the potentially useful biological compounds produced by these extreme-environment organisms.

Continent-wide analysis of moss diversity in Antarctica

| Rodolfo O. Anderson, Steven L. Chown and Rachel I. Leihy | Ecography | 2025 Continent-wide data show Antarctic moss richness varies with temperature, latitude, terrain, bird colonies and geothermal activity while exposing gaps in protected-area coverage.

The distribution of lichens and mosses at Edward VII Peninsula, Marie Byrd Land, Antarctica

| Various authors | Antarctic Science | 2022 Surveys of remote nunataks reveal unexpectedly rich continental Antarctic moss and lichen communities and numerous previously unrecorded regional species.

Lichens

| Australian Antarctic Program | Australian Antarctic Program | 6 December 2021 Antarctic lichens survive extreme cold, dehydration and exceptionally slow growth, with different groups displaying maritime, continental, circumpolar and disjunct distributions.

Mosses and liverworts

| Australian Antarctic Program | Australian Antarctic Program | 2021 More than 100 moss species and several dozen liverworts have been recorded from Antarctica, occupying meltwater areas and other rare habitats capable of supporting vegetation.

Plants and microbes

| Australian Antarctic Program | Australian Antarctic Program | 2021 Antarctica supports lichens, mosses, liverworts, algae, fungi and diverse microorganisms specially adapted to freezing, drought, intense light and extremely limited ice-free habitat.

Description of plant communities on Half Moon Island, Antarctica

| Various authors | Polar Research | 24 October 2018 Botanical surveys identify diverse moss, lichen, flowering-plant and terrestrial-algal communities on heavily visited Half Moon Island in the South Shetlands.

Changes in the lichen biota of the Lions Rump area, King George Island, Antarctica

| Maria Olech and Agnieszka Słaby | Polar Biology | 16 January 2016 Repeat botanical surveys show changes in King George Island lichen communities over two decades during a period of significant environmental change.

Land invertebrates

| Australian Antarctic Program | Australian Antarctic Program | 20 February 2012 Nematodes, tardigrades, rotifers, springtails and mites dominate Antarctic terrestrial animal biodiversity and possess remarkable adaptations to freezing, dehydration and scarce liquid water.

Phytogeography of continental Antarctic lichens

| Various authors | The Lichenologist | 1995 Antarctic lichens display distinct maritime, continental, circumpolar and disjunct distributions reflecting both ancient persistence and more recent colonization events.

Plant biodiversity in an extreme environment: genetic studies of origins, diversity and evolution in the Antarctic

| M. L. Skotnicki and P. M. Selkirk | Macquarie University | n.d. Genetic research on Antarctic mosses and other plants explores how sparse vegetation colonized, survived and diversified within isolated ice-free environments.

Snow algae

| Australian Antarctic Program | Australian Antarctic Program | n.d. Microscopic algae can produce conspicuous green and red blooms on Antarctic snow, creating productive biological hotspots in otherwise nutrient-poor environments.

Microbes, Soils, Freshwater & Lakes

Microbial mat activity and soil biogeochemistry across variable phosphorus availability in Taylor Valley, Antarctica

| Sarah N. Power, Ernest D. Osburn and John E. Barrett | Antarctic Science | 15 May 2025 Phosphorus availability influences microbial mat biomass and nitrogen fixation, while mats enrich otherwise nutrient-poor Dry Valley soils with carbon and nitrogen.

The juvenile Antarctic whelk Neobuccinum eatoni maintains a specialized microbiome in its proboscis even in adulthood

| Various authors | Polar Biology | 14 May 2025 Microbiome research reveals a persistent specialized bacterial community associated with an Antarctic marine gastropod throughout its development.

A comprehensive survey of soil microbial diversity across the Antarctic continent

| Nicholas B. Dragone et al. | Polar Biology | 20 February 2025 Analysis of 200 Antarctic soils reveals geographically and environmentally diverse bacterial and fungal communities despite extreme cold, dryness, nutrient scarcity and salinity.

The perennially ice-covered Lake Enigma, Antarctica supports unique microbial communities

| Francesco Smedile et al. | Communications Earth & Environment | 3 December 2024 Exploration beneath permanent lake ice reveals a previously hidden Antarctic aquatic ecosystem supporting distinctive and unexpectedly complex microbial communities.

The diversity, composition and functions of soil bacterial communities surrounding Syowa Station

| Shu-Kuan Wong et al. | Polar Science | December 2024 Soil sequencing around Syowa Station demonstrates how differing intensities of human disturbance influence the composition and potential functions of Antarctic bacterial communities.

Environmental control and metabolic strategies of organic-matter-responsive bacterioplankton in the Weddell Sea

| Judith Piontek et al. | Environmental Microbiology | 18 July 2024 Weddell Sea bacterioplankton communities respond strongly to organic matter availability, revealing microbial processes underlying Southern Ocean carbon cycling.

Rich microbial and depolymerising diversity in Antarctic krill gut

| Lars Möller et al. | Microbiology Spectrum | 11 March 2024 Antarctic krill possess diverse gut microbial communities capable of breaking down complex organic compounds, adding another dimension to krill's ecosystem role.

Biogeographic survey of soil bacterial communities across Antarctica

| Various authors | Microbiome | 2024 Large-scale bacterial surveys show that established Antarctic conservation biogeographic regions do not completely capture the distributions and diversity of the continent's microbial communities.

Microbial diversity in Antarctic Dry Valley soils across an altitudinal gradient

| Various authors | Frontiers in Microbiology | 2023 Microbial communities in Taylor Valley change substantially with altitude, revealing environmental controls on bacterial and lower-eukaryotic biodiversity in the McMurdo Dry Valleys.

Organic matter availability drives spatial variation in Antarctic marine bacterioplankton

| Judith Piontek et al. | Environmental Microbiology | 2022 Weddell Sea bacterial communities are structured largely by organic matter supplied during phytoplankton blooms rather than simply by extremely cold water temperatures.

Diversity and activity of microorganisms in Antarctic polar soils

| Various authors | One Ecosystem | 2020 Research on Livingston Island soils documents bacterial, actinomycete and fungal communities involved in nutrient cycling, decomposition and soil formation.

Soil bacterial diversity is positively associated with air temperature in the maritime Antarctic

| Paul G. Dennis et al. | Scientific Reports | 25 February 2019 Bacterial diversity across a 1,650-kilometre Antarctic climatic gradient is strongly associated with air temperature, suggesting warming could substantially change terrestrial microbial ecosystems.

Limnology and Aquatic Microbial Ecology of Byers Peninsula

| Various authors | Diversity | 2019 Byers Peninsula contains unusually diverse Antarctic lakes, ponds, streams and wetlands supporting microbial mats, plankton and other aquatic communities across strong productivity gradients.

Relationship between soil fungal diversity and temperature in the maritime Antarctic

| Kevin K. Newsham et al. | Nature Climate Change | 28 September 2015 Antarctic soil fungal diversity changes along climatic gradients, indicating that future warming could reorganize decomposer, pathogen and symbiotic communities.

Microbial ecology and biogeochemistry of continental Antarctic soils

| Various authors | Frontiers in Microbiology | 2014 Antarctic desert soils contain unexpectedly diverse microbial communities that drive carbon and nitrogen cycling in cryptic habitats, permafrost and microbial mats.

Soil bacterial community abundance and diversity in ice-free areas of Keller Peninsula, Antarctica

| Various authors | Applied Soil Ecology | 2012 Bacterial surveys of Keller Peninsula show soil chemistry, especially pH, is a stronger predictor of microbial community structure than vegetation cover.

The biodiversity and ecology of Antarctic lakes: models for evolution

| Johanna Laybourn-Parry and David A. Pearce | Philosophical Transactions of the Royal Society B | 29 December 2007 Antarctic lakes contain simplified but distinctive microbial food webs, endemic microorganisms and environments ranging from freshwater to hypersaline systems.

A microbial perspective of the Ross Ice Shelf

| Antarctica New Zealand | Antarctic Science Platform | n.d. Metagenomic samples collected beneath the Ross Ice Shelf are providing one of the first biodiversity baselines for this enormous and extremely difficult-to-access ecosystem.

Microscopic organisms

| Australian Antarctic Program | Australian Antarctic Program | n.d. Bacteria, archaea, algae, fungi and other microorganisms dominate much of Antarctica's biological diversity and drive essential nutrient and carbon cycles.

Krill, Plankton & Southern Ocean Food Webs

Vertical structuring of zooplankton communities during a short-term study in the Bransfield Strait, Antarctica

| Various authors | Polar Biology | 6 February 2026 Research in the Bransfield Strait shows that phytoplankton, salps and other zooplankton form vertically structured communities controlled by water-column conditions and food availability.

Biomass distribution and swarm characteristics of Antarctic krill in the Western Indian sector of the Southern Ocean

| Yunxia Zhao et al. | ICES Journal of Marine Science | 2026 Acoustic surveys reveal strongly heterogeneous krill distributions and differences between swarms dominated by smaller and larger animals in a proposed climate-refuge region.

Response of indicator species to changes in food web and ocean dynamics of the Ross Sea, Antarctica

| David G. Ainley et al. | Antarctic Science | 19 September 2024 Long-term changes involving Adélie and emperor penguins, Weddell seals, silverfish and toothfish illustrate the interconnected structure of the Ross Sea food web.

Antarctic krill head south

| Australian Antarctic Program | Australian Antarctic Program | 19 December 2023 Decades of research indicate that some Antarctic krill populations are shifting southward as ocean warming and changes in sea ice alter their habitat.

Quantifying circumpolar summer habitat for Antarctic krill and Ice krill

| B. Merkel et al. | ICES Journal of Marine Science | 14 July 2023 Habitat modelling demonstrates contrasting circumpolar distributions of Antarctic krill and ice krill and identifies environmental factors controlling each species.

Distribution and biomass estimation of Antarctic krill off the South Orkney Islands during 2011–2020

| G. Skaret | ICES Journal of Marine Science | 13 May 2023 A decade of acoustic surveys confirms the South Orkney region as one of the consistently important high-density krill habitats in the Scotia Sea.

Status, Change, and Futures of Zooplankton in the Southern Ocean

| Nadine M. Johnston et al. | Frontiers in Ecology and Evolution | 17 June 2022 A major assessment evaluates Antarctic krill, copepods, salps, pteropods and other zooplankton as key components of food webs, carbon cycling and ecosystem services.

Marine food webs are more complex but less stable in sub-Antarctic than Antarctic regions

| Various authors | Marine Environmental Research | February 2022 Comparison with the Beagle Channel indicates that the Potter Cove Antarctic food web is comparatively less complex but potentially more stable to ecological disturbance.

Changing Biogeochemistry of the Southern Ocean and Its Ecosystem Implications

| Various authors | Frontiers in Marine Science | 2020 Changes in Southern Ocean iron, carbon and nutrient cycling can alter phytoplankton productivity, food webs, carbon export and ultimately Antarctic marine ecosystem structure.

Antarctic krill population contracts southward as polar oceans warm

| British Antarctic Survey | British Antarctic Survey | 21 January 2019 Nearly a century of observations indicates that Atlantic-sector Antarctic krill distribution has contracted southward by hundreds of kilometres during recent climate warming.

The importance of Antarctic krill in biogeochemical cycles

| Geraint A. Tarling et al. | Nature Communications | 2019 Krill influence carbon export, nutrient recycling and iron cycling while simultaneously transferring phytoplankton production to predators throughout the Southern Ocean.

Virtual view into the world of krill

| Australian Antarctic Program | Australian Antarctic Program | 1 August 2017 Australian researchers explain Antarctic krill biology and experiments investigating how warming, sea-ice changes and ocean acidification affect this central Southern Ocean species.

Antarctic krill

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic krill form the central trophic connection between phytoplankton and many fishes, penguins, flying seabirds, seals and baleen whales.

Explore Antarctica: Krill matters

| Australian Antarctic Program | Australian Antarctic Program | n.d. An extensive overview explains Antarctic krill ecology, predator dependence, fisheries management, sea-ice habitat, acidification and the species' central role in Southern Ocean biodiversity.

Krill and Oceanographic Research in the Antarctic

| NOAA Fisheries | NOAA Fisheries | n.d. Acoustic surveys, gliders and oceanographic measurements are used to understand Antarctic krill abundance, environmental variability and predator-prey relationships.

Salps

| Australian Antarctic Program | Australian Antarctic Program | n.d. Gelatinous salps can dominate parts of the Southern Ocean plankton community and may become increasingly important where environmental conditions become less favorable for krill.

Benthic, Seafloor & Deep-Sea Biodiversity

Heterobranch Sea Slugs from the Southern Ocean: Biodiversity and Taxonomy

| Various authors | Diversity | 3 May 2025 A taxonomic synthesis documents the diversity and distribution of Southern Ocean heterobranch sea slugs, a comparatively understudied component of Antarctic benthic biodiversity.

Soft bottom benthic communities under potentially anthropic and natural pressures in Terra Nova Bay

| Luigia Donnarumma et al. | Polar Biology | 4 March 2025 Macrozoobenthic communities near Terra Nova Bay vary in areas exposed to research-station activity and natural enrichment from penguin colonies.

Benthic community heterogeneity on the Eastern Antarctic continental shelf

| C. J. Grimes et al. | Polar Biology | 7 February 2025 Underwater imagery reveals highly heterogeneous East Antarctic benthic communities and helps evaluate whether existing ecological regionalizations capture seafloor biodiversity.

Antarctic benthic ecological change

| Huw J. Griffiths et al. | Nature Reviews Earth & Environment | 3 September 2024 Antarctic seafloor ecosystems combine exceptional endemism with slow-growing organisms that are increasingly exposed to warming, acidification, ice loss and human pressures.

Biodiversity patterns of benthic macrofaunal communities across the intertidal sedimentary shores of two Antarctic islands

| T. Revanales et al. | Marine Environmental Research | February 2024 Livingston and Deception Islands support significantly different intertidal macrofaunal communities, demonstrating the importance of spatial scale in Antarctic biodiversity surveys.

New insights into the diversity and ecology of benthic hydroids from the Ross Sea

| Various authors | Polar Biology | 11 July 2023 Collections from multiple expeditions expand knowledge of Ross Sea hydroid diversity, including poorly known components of one of Antarctica's richest benthic faunas.

Identifying vulnerable marine ecosystems: an image-based vulnerability index for the Southern Ocean seafloor

| Various authors | ICES Journal of Marine Science | 25 February 2023 Underwater imagery is used to assess habitat-forming seafloor organisms and improve identification and protection of vulnerable marine ecosystems from fishing impacts.

Benthic Biome of the Southern Ocean

| S. C. Tripathy | Wiley | 1 April 2022 Southern Ocean benthic biodiversity reflects millions of years of isolation, glacial cycles and ocean circulation, producing unusual adaptations, distributions and high levels of endemism.

Responses of Southern Ocean Seafloor Habitats and Communities to Global and Local Drivers of Change

| Various authors | Frontiers in Marine Science | 2021 Antarctic seafloor habitats face interacting pressures from warming, acidification, iceberg disturbance, fisheries, pollution and potential biological invasions.

Comparative marine biodiversity and depth zonation in the Southern Ocean

| Various authors | Marine Biodiversity | 6 May 2019 A large polychaete dataset from the Scotia and Amundsen Seas reveals highly heterogeneous shelf and deep-sea communities and large numbers of poorly known species.

Southern Ocean Deep Benthic Biodiversity

| Angelika Brandt et al. | British Antarctic Survey / Wiley-Blackwell | 6 June 2012 Deep Southern Ocean samples contain extraordinary species richness and high proportions of organisms apparently new to science, demonstrating major remaining biodiversity knowledge gaps.

Antarctic Marine Biodiversity and Deep-Sea Hydrothermal Vents

| Steven L. Chown | PLOS Biology | 3 January 2012 Antarctic hydrothermal vents add another distinctive ecosystem to a Southern Ocean already notable for unusually rich and highly endemic benthic communities.

Antarctic macro-zoobenthic communities: a review and an ecological classification

| Julian Gutt | Antarctic Science | 2007 Antarctic shelf communities range from sponge-rich suspension-feeding assemblages to mobile and sediment-dwelling communities structured by currents, food supply and seafloor conditions.

First insights into the biodiversity and biogeography of the Southern Ocean deep sea

| Angelika Brandt et al. | Nature | 2007 Deep Weddell Sea sampling revealed extraordinary previously unknown diversity, including hundreds of isopod species, illustrating how incompletely the Antarctic deep sea has been explored.

The biodiversity of the deep Southern Ocean benthos

| Various authors | British Antarctic Survey | 2007 Deep-sea surveys reveal extraordinary Southern Ocean benthic richness, high endemism and large numbers of undescribed species across multiple invertebrate groups.

A living laboratory: Antarctica's Ross Sea benthic communities

| Antarctica New Zealand | Antarctic Science Platform | n.d. Ross Sea seafloor research examines how warming, acidification, changing sea ice and ice-shelf retreat could restructure habitat-forming organisms and marine biodiversity.

Seabed benthic communities

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic seafloors support rich communities of sponges, echinoderms, worms, crustaceans, molluscs and other organisms despite near-freezing temperatures.

Sponges

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic sponges can be extremely long-lived and form three-dimensional habitat supporting numerous other seafloor organisms.

Fish, Squid & Mid-Trophic Marine Fauna

Diet of Antarctic toothfish from the Ross Sea continental shelf, Antarctica

| Darren W. Stevens et al. | Antarctic Science | 25 May 2026 Antarctic toothfish on the Ross Sea shelf feed primarily on small notothenioid fishes and icefish, providing new information about trophic relationships within this protected ecosystem.

Are there distribution patterns and population structure differences among demersal fish species in relation to Antarctic benthic communities?

| Various authors | Polar Biology | 2023 Weddell Sea observations show relationships between demersal fish populations and structurally complex sponge, bryozoan and other macrobenthic habitats.

Squid

| Australian Antarctic Program | Australian Antarctic Program | n.d. Southern Ocean squid occupy important middle trophic levels, consuming fish and crustaceans while supporting seals, whales, penguins and other predators.

Penguins & Seabirds

Do ocean currents shape patterns of penguin hybridization?

| Jente Ottenburghs | Polar Biology | 4 July 2025 The study explores whether ocean circulation helps explain asymmetric hybridization and gene flow among geographically separated penguin populations.

Regional emperor penguin population declines exceed modelled projections

| P. T. Fretwell et al. | Communications Earth & Environment | 10 June 2025 Satellite observations indicate that emperor penguin populations in parts of Antarctica are declining more rapidly than earlier climate-based projections predicted.

Long-distance winter migrations of chinstrap penguins and elephant seals to a persistent bloom at the edge of the Ross Gyre

| Cara Wilson, Jefferson T. Hinke and Matthew Mazloff | Scientific Reports | 21 March 2025 Tracking shows that chinstrap penguins and southern elephant seals travel enormous distances to exploit a persistent productive winter habitat.

Effects of an Adélie penguin colony on coastal meiofaunal assemblages of the Ross Sea

| Cristina Gambi et al. | Polar Biology | 20 March 2025 Heavy guano deposition near an Adélie penguin colony alters sediment chemistry and is associated with reduced richness of meiofauna and nematodes.

Sedimentary DNA insights into Holocene Adélie penguin populations and ecology in the Ross Sea, Antarctica

| Jamie R. Wood et al. | Nature Communications | 5 March 2025 Six thousand years of sedimentary DNA reveal long-term changes in Adélie penguin populations, diets and associated Ross Sea wildlife.

Evidence of eastern rockhopper penguin feeding on a key commercial arrow squid species

| Hugo R. Guímaro et al. | Polar Biology | 7 February 2025 Penguin diet samples reveal changes in Southern Ocean cephalopod diversity and document consumption of a commercially valuable arrow squid.

Review of the techniques for estimating population size of Adélie penguins

| Alexandra J. Strang et al. | Polar Biology | 9 January 2025 Researchers compare ground surveys, crewed aircraft, drones and satellite imagery for monitoring Adélie penguin colonies across the enormous Antarctic landscape.

Adélie penguin

| Australian Antarctic Program | Australian Antarctic Program | Updated 23 October 2024 Adélie penguins are closely associated with sea ice and provide an important indicator of regional changes in prey, ice conditions and Southern Ocean ecosystems.

Quantifying Antarctic krill connectivity across the West Antarctic Peninsula and its role in Pygoscelis penguin population dynamics

| Katherine L. Gallagher, Michael S. Dinniman and Heather J. Lynch | Scientific Reports | 26 July 2023 Ocean circulation connects krill populations across the West Antarctic Peninsula and may help explain geographic differences in penguin population trajectories.

Contrasting environmental conditions precluded lower availability of Antarctic krill affecting breeding chinstrap penguins

| Nuria Salmerón et al. | Scientific Reports | 31 March 2023 Low krill availability forced chinstrap penguins to increase foraging effort and contributed to lower breeding success during unfavorable environmental conditions.

The contribution of penguin guano to the Southern Ocean iron pool

| Various authors | Nature Communications | 2023 Chinstrap penguins recycle hundreds of tonnes of iron annually through guano, linking seabird populations with nutrient availability and marine primary production.

Penguin heaven: multi-decade science reveals secret lives of Adélies

| Australian Antarctic Program | Australian Antarctic Program | 13 May 2022 Long-term monitoring shows a sixfold increase in Adélie penguin breeding pairs in the Windmill Islands while revealing how sea ice and prey influence colony success.

Seal and penguin poo is major driver of Antarctic terrestrial biodiversity

| British Antarctic Survey | British Antarctic Survey | 13 May 2019 Nitrogen transported ashore by seals and penguins fertilizes surrounding landscapes and supports unexpectedly rich moss, lichen and invertebrate communities far beyond colonies.

Chinstrap penguin

| Australian Antarctic Program | Australian Antarctic Program | n.d. Chinstrap penguins breed across parts of the Antarctic Peninsula and Scotia Arc and depend heavily on krill during their breeding season.

Emperor penguin

| Australian Antarctic Program | Australian Antarctic Program | n.d. Emperor penguins depend on stable fast ice for breeding, making their life cycle unusually vulnerable to changes in the timing and persistence of Antarctic sea ice.

Gentoo penguin

| Australian Antarctic Program | Australian Antarctic Program | n.d. Gentoo penguins have expanded in several warming Antarctic Peninsula areas, contrasting with declines of more ice-associated penguin species.

Seabird Research in the Antarctic

| NOAA Fisheries | NOAA Fisheries | n.d. NOAA monitors Adélie, chinstrap and gentoo penguins plus flying seabirds to assess ecosystem health, krill availability, climate effects and fisheries interactions.

Seabirds at risk

| Australian Antarctic Program | Australian Antarctic Program | n.d. Southern Ocean seabirds face threats including fishing bycatch, invasive predators, pollution, disease, changing prey distributions and climate-driven ecosystem change.

Seals, Whales & Other Marine Predators

Whale recovery and the emerging human-wildlife conflict over Antarctic krill

| Matthew S. Savoca et al. | Nature Communications | 10 September 2024 Recovering baleen whale populations and an expanding commercial krill fishery may increasingly compete for the Antarctic krill supporting much of the Southern Ocean food web.

Prey targeted by lactating Weddell seals in Erebus Bay, Antarctica

| Rose T. N. Foster-Dyer et al. | Polar Biology | 12 August 2024 Animal-borne cameras and dive recorders identify the fishes and other prey captured by lactating Weddell seals as they replenish energy after giving birth.

Crabeater seal

| Australian Antarctic Program | Australian Antarctic Program | Updated 20 March 2018 Despite their name, crabeater seals specialize in filtering Antarctic krill and are among the world's most abundant large marine mammals.

Blue whale

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic blue whales were devastated by industrial whaling and remain a major conservation focus as populations slowly recolonize historical Southern Ocean feeding grounds.

Killer whale

| Australian Antarctic Program | Australian Antarctic Program | n.d. Several ecologically distinct killer-whale forms occur around Antarctica, exploiting prey ranging from fish to seals and other marine mammals.

Leopard seal

| Australian Antarctic Program | Australian Antarctic Program | n.d. Leopard seals are major Antarctic predators whose varied diet includes krill, fish, penguins and other seals.

Minke whale

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic minke whales are strongly associated with pack ice and feed extensively on krill, connecting sea-ice habitat with higher levels of the food web.

Pinniped Research in the Antarctic

| NOAA Fisheries | NOAA Fisheries | n.d. Antarctic fur seals and leopard seals are monitored to understand population trends, diet, foraging behaviour and their relationships with krill and changing ocean conditions.

Weddell seal

| Australian Antarctic Program | Australian Antarctic Program | n.d. Weddell seals are among Antarctica's most southerly breeding mammals and depend on sea ice while feeding on fish, squid and other marine organisms beneath it.

Monitoring, Mapping, eDNA & Biodiversity Baselines

Unravelling drivers of distribution and niche shifts in Antarctic krill through ontogenetic information and model transferability

| Various authors | ICES Journal of Marine Science | 8 July 2026 Life-stage-specific models reveal how environmental conditions and ecological processes influence Antarctic krill distribution and why different developmental stages may respond differently to climate change.

Structured monitoring enhances regional trend and abundance estimates for Pygoscelis penguins around the Antarctic Peninsula

| Clare M. Flynn and Heather Lynch | Antarctic Science | 5 June 2026 Simulations show that coordinated ground and satellite surveys could greatly improve estimates of Adélie, gentoo and chinstrap penguin abundance and population trends.

Genetic hotspots for conserving Southern Ocean benthic biodiversity

| Various authors | Current Biology | 9 March 2026 Genetic data from 28 benthic invertebrate species identify major Southern Ocean diversity and connectivity hotspots, many of which remain outside existing marine protected areas.

Antarctic Ecosystem Research Division

| NOAA Fisheries | NOAA Fisheries | Updated 4 March 2026 NOAA's Antarctic ecosystem research integrates observations of krill, ocean conditions, seabirds and marine mammals to support ecosystem-based management of Southern Ocean resources.

Antarctic soil prokaryotic diversity: a dataset of 319 metagenome-assembled genomes from Deception and Livingston Islands

| William B. Medeiros et al. | Microbiology Resource Announcements | 18 February 2026 Hundreds of reconstructed bacterial genomes reveal substantial previously inaccessible microbial diversity and metabolic potential in Antarctic Peninsula soils.

Research Bias in Long-Term Monitoring of Antarctic Nearshore Marine and Terrestrial Biota

| Shae L. Jones et al. | Global Change Biology | 18 August 2025 Antarctic long-term monitoring is heavily concentrated on penguins and marine mammals and along the West Antarctic Peninsula, leaving important geographic and taxonomic gaps.

Testing new ways to monitor biodiversity in seawater on RSV Nuyina

| Australian Antarctic Program | Australian Antarctic Program | 27 March 2025 Researchers are testing automated environmental-DNA sampling as a way to expand biodiversity monitoring across otherwise difficult-to-survey Southern Ocean waters.

Antarctic biodiversity database has ice-free areas covered

| Australian Antarctic Program | Australian Antarctic Program | 30 January 2025 A new database consolidates more than 35,600 records covering 1,890 species of mosses, lichens, fungi, microbes, invertebrates, birds and seals across ice-free Antarctica.

A dataset of Antarctic ecosystems in ice-free lands: classification, descriptions, and maps

| Anikó B. Tóth et al. | Scientific Data | 22 January 2025 Researchers produced the first comprehensive ecosystem classification and map for Antarctica's ice-free lands, where most of the continent's terrestrial biodiversity occurs.

2025–2026 Science Planning Summary: Organisms and Ecosystems

| United States Antarctic Program | USAP | 2025 Current US Antarctic research includes Adélie penguins, Weddell seals, ascidian microbiomes, Dry Valley microbial mats and microbial succession at methane seeps.

A new Antarctic season begins for 2025/26

| British Antarctic Survey | British Antarctic Survey | 2025 New field programs monitor benthic organisms, krill, seabirds, vegetation and other biodiversity to detect ecosystem changes and improve conservation management.

Environmental DNA metabarcoding offers a unique perspective on circum-Antarctic fish community dynamics

| Yehui Wang et al. | Marine Environmental Research | 2025 Circum-Antarctic eDNA sampling identifies distinct regional fish assemblages and suggests particularly high diversity in some nearshore and Amundsen-Bellingshausen Sea habitats.

A circumpolar study of surface zooplankton biodiversity of the Southern Ocean based on eDNA metabarcoding

| Various authors | Environmental Research | 15 August 2024 Circumpolar eDNA sampling detects more than 300 zooplankton species and highlights substantial contributions from jellyfish, molluscs and polychaetes.

A satellite-derived baseline of photosynthetic life across Antarctica

| Charlotte V. Walshaw et al. | Nature Geoscience | 6 August 2024 Sentinel-2 imagery provides the first continent-wide baseline map of Antarctic green vegetation, lichens and snow algae for monitoring future ecological change.

A new Activity Monitor for Aquatic Zooplankter allows recording of swimming activity in wild-caught Antarctic krill

| Various authors | Scientific Reports | 2024 A new experimental system enables detailed measurements of krill swimming behavior and may improve understanding of swarming, migration and environmental responses.

First pelagic fish biodiversity assessment of Cosmonaut Sea based on environmental DNA

| Yuzhuo Liao et al. | Marine Environmental Research | November 2023 Environmental DNA substantially expands knowledge of fish diversity in the poorly surveyed Cosmonaut Sea and establishes a baseline for future monitoring.

Spatio-temporal patterns of eukaryotic biodiversity in shallow hard-bottom communities from the West Antarctic Peninsula revealed by DNA metabarcoding

| Carlos Angulo-Preckler et al. | Diversity and Distributions | 5 May 2023 DNA surveys identify thousands of molecular taxa and substantial spatial and temporal variation in poorly documented West Antarctic benthic communities.

Sclerochronology in the Southern Ocean

| Alejandro Roman Gonzalez et al. | Polar Biology | 1 July 2021 Growth bands in shells and other hard biological structures provide records of age, growth and environmental conditions for numerous Southern Ocean species.

From Data to Marine Ecosystem Assessments of the Southern Ocean

| Various authors | Frontiers in Marine Science | 2021 Researchers review Southern Ocean biodiversity-monitoring programs and emphasize coordinated observations, environmental DNA, autonomous technology and standardized ecosystem assessments.

Capturing marine biodiversity with the power of genetics

| Australian Antarctic Program | Australian Antarctic Program | 2020 Environmental DNA metabarcoding detects Southern Ocean biodiversity from seawater and can complement conventional plankton sampling while identifying additional species.

Diversity of Mesopelagic Fishes in the Southern Ocean — A Phylogeographic Perspective Using DNA Barcoding

| Various authors | Frontiers in Ecology and Evolution | 2018 DNA barcoding demonstrates substantial genetic and evolutionary diversity among Southern Ocean mesopelagic fishes despite relatively low overall fish species richness.

Metagenomic sequencing of environmental DNA reveals marine faunal assemblages from the West Antarctic Peninsula

| Various authors | Marine Genomics | 2018 Seawater DNA detects benthic invertebrates, endemic Antarctic fishes and king crabs, demonstrating the value of metagenomics for monitoring difficult-to-survey marine biodiversity.

A primer to metabarcoding surveys of Antarctic terrestrial biodiversity

| Various authors | Antarctic Science | 2016 DNA metabarcoding provides a powerful approach for identifying cryptic native species, microorganisms and biological invasions across remote Antarctic terrestrial environments.

New field season begins

| British Antarctic Survey | British Antarctic Survey | 2016 BAS field research includes monitoring krill-dependent predators and investigating the invasive flightless midge Eretmoptera murphyi on Signy Island.

How many species in the Southern Ocean? Towards a dynamic inventory of Antarctic marine species

| Various authors | Deep Sea Research Part II | 2011 A major attempt to inventory Southern Ocean organisms illustrates both the extraordinary richness of Antarctic marine life and persistent gaps in taxonomic knowledge.

Scientific research

| Australian Antarctic Program | Australian Antarctic Program | n.d. Australia's Antarctic science program integrates research on climate, marine and terrestrial ecosystems, fisheries, wildlife conservation and human impacts in Antarctica and the Southern Ocean.

Conservation, Protected Areas & Human Impacts

Assessing the long-term impacts of research facilities on soil ecosystems of the McMurdo Dry Valleys, Antarctica

| Adrian Howkins et al. | Antarctic Science | 14 May 2026 Former research-facility sites in the McMurdo Dry Valleys show persistent ecological effects, including reduced nematode abundance, demonstrating the exceptionally slow recovery of Antarctic soils.

CCAMLR Ecosystem Monitoring Program

| CCAMLR | Commission for the Conservation of Antarctic Marine Living Resources | Updated 2026 CCAMLR uses penguins, albatrosses, petrels and Antarctic fur seals as indicator species for detecting ecosystem changes associated with fisheries and environmental variability.

Protecting marine biodiversity through genetic information

| Various authors | Current Biology / PubMed | 2026 Population genetics identifies Southern Ocean biodiversity hotspots where conserving genetic variation and connectivity could strengthen ecosystem resilience to rapid environmental change.

Advocating microbial diversity conservation in Antarctica

| Laura Zucconi et al. | npj Biodiversity | 4 March 2025 Antarctic microorganisms contribute substantially to ecosystem functioning but receive relatively little attention in conservation planning despite growing climate and human pressures.

Emerging threats to Antarctic conservation

| Various authors | Nature Ecology & Evolution | 2025 An international horizon scan identifies emerging Antarctic conservation threats including extreme weather, wildlife pathogens, political disruption, expanding human activity and weaknesses in environmental governance.

The fishery for Antarctic krill – Conflicts between industrial production, protection of biodiversity, and legal governance

| Various authors | Marine Policy | 2025 Increasing krill catches raise questions about whether fisheries governance adequately protects predators and broader Southern Ocean biodiversity.

Long-distance Southern Ocean environmental DNA transect provides insights into spatial marine biota and invasion pathways for non-native species

| Various authors | Science of the Total Environment | 15 November 2024 An extensive eDNA transect demonstrates biodiversity-monitoring potential while detecting organisms of biosecurity concern potentially transported by ship hulls.

Molecular monitoring for marine change and threats

| Australian Antarctic Program | Australian Antarctic Program | 30 September 2024 Environmental DNA is being integrated with long-running plankton surveys to monitor Southern Ocean biodiversity and improve early detection of non-native marine species.

Priority areas for marine protection in the Amundsen and Bellingshausen Seas, Antarctica

| Various authors | Marine Policy | September 2024 Spatial conservation analysis identifies priority habitats in the Amundsen and Bellingshausen Seas that could contribute to a representative Southern Ocean marine protected-area network.

Antarctic tourism

| Australian Antarctic Program | Australian Antarctic Program | Updated 6 May 2024 Rapidly increasing tourism requires management to prevent wildlife disturbance, vegetation trampling, pollution and accidental transport of alien species into Antarctic ecosystems.

At-sea distribution of marine predators around South Georgia during austral winter, with implications for fisheries management

| Various authors | Polar Biology | 2024 Winter surveys map seals, penguins, seabirds and whales in relation to krill concentrations and identify locations where predators overlap commercial fishing activity.

Diverse marine benthic communities and reduced anthropogenic contaminants near Scott Base

| Andrew M. Lohrer et al. | Polar Biology | 8 August 2023 Surveys near Scott Base document diverse benthic communities while providing evidence about changes in contamination associated with decades of environmental management.

Impacts of tourism in Antarctica

| IUCN | International Union for Conservation of Nature | June 2023 Rapid tourism growth increases wildlife disturbance, vegetation damage, pollution and invasive-species risks, adding direct human pressure to Antarctic ecosystems already affected by climate change.

Conservation and leadership in Southern Ocean ecosystems

| British Antarctic Survey | British Antarctic Survey | 2023–2033 The CONSEC research program investigates Southern Ocean biodiversity, food webs, carbon cycling, pollution, climate effects and fisheries to support ecosystem-based conservation.

Plastic occurrence, sources, and impacts in Antarctic environment and biota

| Various authors | Water Biology and Security | May 2022 A review documents plastics and microplastics in Antarctic sea ice, seawater, sediment and organisms and discusses their emerging ecological effects.

Studying and Conserving Antarctic Ecosystems

| NOAA Fisheries | NOAA Fisheries | 2022 NOAA describes the Antarctic food web and long-term ecosystem research used to understand climate variability, krill, predators and sustainable management of Southern Ocean fisheries.

Marine Protected Areas

| CCAMLR | Commission for the Conservation of Antarctic Marine Living Resources | Updated 3 July 2020 Southern Ocean marine protected areas are designed to conserve biodiversity, ecosystem processes, predator-prey relationships and scientifically important habitats.

Benthic ecoregionalization based on echinoid fauna of the Southern Ocean supports current proposals of Antarctic Marine Protected Areas

| Salomé Fabri-Ruiz et al. | Global Change Biology | 9 January 2020 Sea-urchin distributions help define Southern Ocean benthic ecoregions and test whether proposed marine protected areas remain representative under projected climate change.

Ice-free area expansion compounds the non-native species threat to Antarctic terrestrial biodiversity

| Various authors | Biological Conservation | April 2019 Climate-driven expansion of ice-free land could greatly enlarge areas suitable for biological invasion, especially near heavily visited regions of the Antarctic Peninsula.

A snapshot of biodiversity protection in Antarctica

| Hannah S. Wauchope, Justine D. Shaw and Aleks Terauds | Nature Communications | 26 February 2019 Continent-wide analysis finds major taxonomic and geographical gaps in Antarctic protected areas despite their importance for safeguarding species confined to tiny ice-free habitats.

Plastics in sea surface waters around the Antarctic Peninsula

| Various authors | Scientific Reports | 2019 Surveys detect microplastics and mesoplastics in Antarctic Peninsula surface waters and find microorganisms and invertebrates colonizing floating plastic debris.

The conservation status and priorities for albatrosses and large petrels

| Various authors | Biological Conservation | September 2016 Albatrosses and large petrels face persistent threats from fishery bycatch, introduced predators, disease and habitat disturbance despite effective conservation techniques being available.

Assessing the effectiveness of specially protected areas for conservation of Antarctica's botanical diversity

| Kevin A. Hughes et al. | Conservation Biology | February 2016 Analysis of Antarctic Specially Protected Areas examines whether the existing reserve system adequately represents vulnerable moss, lichen and other plant communities.

Antarctic biogeography revisited: updating the Antarctic Conservation Biogeographic Regions

| Aleks Terauds and Jasmine R. Lee | Diversity and Distributions | 2016 Updated biodiversity information expands Antarctica's conservation biogeographic framework to 16 regions and provides a stronger basis for protected-area planning and biosecurity.

Wildlife management

| Australian Antarctic Program | Australian Antarctic Program | 27 October 2015 Long-term research on whales, seals and seabirds supports Antarctic wildlife conservation by monitoring populations, breeding ecology, fisheries interactions and environmental pressures.

Fish from the Southern Ocean: biodiversity, ecology and conservation challenges

| Marino Vacchi | Frontiers in Marine Science | 2015 Southern Ocean fish diversity is dominated by highly specialized notothenioids whose evolutionary radiation reflects Antarctica's isolation and extreme marine environment.

Characterizing foodweb structure to identify potential ecosystem effects of fishing in the Ross Sea, Antarctica

| Various authors | ICES Journal of Marine Science | 13 February 2014 Food-web modelling examines whether harvesting Antarctic toothfish could indirectly affect demersal fish and other components of the Ross Sea ecosystem.

Antarctica's Protected Areas Are Inadequate, Unrepresentative, and at Risk

| Various authors | PLOS Biology | 2014 Analysis finds only a small portion of Antarctica's ice-free biodiversity habitat receives special protection and many protected sites are vulnerable to biological invasion.

Key Antarctic species under threat from ocean acidification

| Australian Antarctic Program | Australian Antarctic Program | 8 July 2013 Experiments and modelling show increasing Southern Ocean acidity could sharply reduce Antarctic krill reproductive success, threatening predators dependent upon this keystone species.

Conservation biogeography of the Antarctic

| Aleks Terauds et al. | Diversity and Distributions | 22 May 2012 Biodiversity records were used to identify biologically distinctive Antarctic Conservation Biogeographic Regions and reveal substantial gaps in terrestrial reserve representation.

Antarctic visitor guidelines

| Australian Antarctic Program | Australian Antarctic Program | n.d. Visitor rules are intended to reduce disturbance of penguins, seals and other wildlife while preventing vegetation damage, pollution and introduction of non-native organisms.

Biodiversity conservation

| Australian Antarctic Program | Australian Antarctic Program | n.d. Australia's Antarctic biodiversity program studies ecological sensitivity, environmental change, spatial conservation and marine protected areas to support evidence-based environmental management.

During Your Visit

| IAATO | International Association of Antarctica Tour Operators | n.d. Tourism operators outline biosecurity and wildlife-protection practices intended to minimize disturbance and prevent visitors from transporting non-native species to Antarctica.

Improving knowledge and protection of the unique Antarctic life: from land to ocean and into the deep sea

| Antarctica InSync | Antarctica InSync | n.d. An international research framework calls for expanded biodiversity censuses, connectivity studies and coordinated observations spanning Antarctic terrestrial, coastal, pelagic and deep-sea ecosystems.

Protecting and managing special areas

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic Specially Protected Areas restrict activities in ecologically or scientifically important locations but encompass only a fraction of the continent's scarce ice-free habitat.

Protecting plants and animals

| Australian Antarctic Program | Australian Antarctic Program | n.d. Antarctic environmental protection addresses historical exploitation, modern disturbance, disease risk and threats to native plants, seabirds, seals and other wildlife.