Biodiversity and Environmental Change in Antarctic Ecosystems

Antarctica and its surrounding waters host a unique assemblage of life adapted to extreme cold, seasonal darkness and ice-covered landscapes. Terrestrial biodiversity is dominated by hardened mosses, lichens, micro-arthropods and microbial communities, while the Southern Ocean supports phytoplankton blooms, krill and a diverse suite of marine predators. Recent warming has led to ice-sheet retreat, longer melt seasons and reduced sea-ice extent, driving shifts in habitat availability and resource dynamics. Emerging vegetation on deglaciated ground illustrates an ongoing ‘greening’ trend, and changing sea-ice patterns are altering the base of marine food webs. Simultaneously, increasing human presence and shipping activity raise the risk of non-native introductions and ecosystem disturbance. Together, these factors have global implications for climate feedbacks, biogeochemical cycles and conservation strategies, underscoring the urgency of monitoring, modelling and managing Antarctic ecosystems in a rapidly changing world.

Research from Nature Portfolio

One recent analysis has utilised decades of satellite imagery and cloud-based processing to reveal accelerating expansion of moss-dominated ecosystems along the Antarctic Peninsula. Between the late 1980s and early 2020s, estimated vegetation cover increased more than tenfold, with greening accelerating in the last half-decade. These findings demonstrate not only the responsiveness of cold-climate terrestrial systems to anthropogenic warming but also the value of remote sensing approaches in tracking ecosystem shifts at regional scales.

Biodiversity and Environmental Change in Antarctic Ecosystems publication trend

The graph below shows the total number of articles in biodiversity and environmental change in antarctic ecosystems across all publications each year (not limited to Nature Index journals).

Technical terms

Cryosphere: The frozen water components of Earth, including ice sheets, sea ice and permafrost that shape polar habitats.

Remote sensing: The acquisition of environmental data from satellites or aircraft to monitor land and ice dynamics over time.

Primary productivity: The rate at which photosynthetic organisms convert sunlight into organic matter, forming the base of food webs.

Non-native species: Organisms introduced to regions beyond their native range, which may disrupt local ecosystems and nutrient cycles.

Biosecurity: Measures implemented to prevent the introduction and spread of harmful organisms in sensitive environments.

References

1. Sustained greening of the Antarctic Peninsula observed from satellites. Nature Geoscience (2024).
2. Ecological consequences of a single introduced species to the Antarctic: terrestrial impacts of the invasive midge Eretmoptera murphyi on Signy Island. Soil Biology and Biochemistry (2023).
3. Antarctic environmental change and biological responses. Science Advances (2019).