The Southern Ocean represents one of Earth’s most extraordinary ecosystems. It is a place of high productivity and biodiversity, hosting species uniquely adapted to extreme cold and relative stability. From coastal margins and ice-covered shelves to the deep pelagic and seafloor communities, Antarctic life is characterized by distinctive evolutionary histories, ecological interactions, and functional traits. Many of these organisms, such as Antarctic krill or baleen whales, play keystone roles in global food webs and carbon cycling, linking the Southern Ocean tightly to planetary health.
Despite its remoteness, this ecosystem is increasingly vulnerable. Climate-driven changes in sea ice, warming waters, and ocean acidification are altering the distribution, abundance, and life cycles of species. At the same time, local pressures — including fisheries and growing human activity — compound stress on ecosystems already under strain. Recent discoveries of unknown habitats and shifts in key species highlight how little is still understood about biodiversity and ecosystem connectivity in this region, underlining the urgency of a coordinated, circumpolar research effort. Protecting Antarctic life is not only a regional challenge but also a global necessity, given the Southern Ocean’s role in climate regulation, nutrient fluxes, and carbon sequestration.
Antarctica InSync aims to address these challenges by promoting integrated and collaborative studies that capture biodiversity and ecosystem functioning across scales of space and time. This includes winter and transitional periods that are still poorly observed. A holistic approach will combine traditional surveys with new technologies such as eDNA, acoustic and imaging tools, and genetic repositories, delivering the most comprehensive assessment of Antarctic life to date and providing a foundation for conservation and management strategies.
Key scientific questions
- How are Antarctic ecosystems, species distributions, and life cycles being reshaped by past, ongoing, and future changes?
- How resilient are functional groups and key species to climate variability and human pressures?
- What ecological feedbacks (e.g., food web shifts, nutrient fluxes, carbon cycling) result from environmental change?
- What are the implications of ecosystem shifts for ecosystem services and global climate regulation?
Pathways to address these questions
- Systematic and standardized long-term surveys of habitats and species
- Mapping pelagic genetic diversity to establish baselines
- Identifying resilience mechanisms in organisms and ecosystems
- Developing robust projections of biodiversity under change
- Designing management and conservation strategies that incorporate ecological dynamics and uncertainty
Emerging Working Group Topics
- Krill–Whale–Human Interactions — linking studies on keystone species to understand dynamics under combined fishing and climate pressures.
- Environmental DNA & the Antarctic Microbiome — building a standardized circumpolar program to detect biodiversity, track shifts, and conduct the first pan-Antarctic microbiome survey.
- Census of Deep Antarctic Biodiversity — extending the legacy of CAML to explore undersampled seafloor habitats, resample historical transects, and include terrestrial/coastal ecosystems.
- Habitats, Connectivity, and Biological Interactions — using biotagged species (mammals, seabirds, penguins) to connect land, ice, and ocean observatories.
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