Knowra Arctic marine ecosystem Arctic marine ecosystem The interacting organisms and environmental processes of Arctic seas, coastal waters, and sea ice. Its seasonal light, ice cover, and cold shape distinctive food webs.
Arctic sea ice : Floating seawater ice that forms, melts, and moves across the Arctic Ocean. Its seasonal cover controls light, habitat, and access to under-ice food.
Arctic Ocean : The ocean surrounding the North Pole, bordered by northern Eurasia, North America, and Greenland. Its basins and marginal seas contain the ecosystem’s marine habitats.
Arctic biodiversity monitoring : The systematic observation of Arctic species, populations, and ecological communities. Long-term records reveal changes in species ranges and ecosystem condition.
Arctic amplification : The faster warming of the Arctic compared with the global average. It intensifies environmental shifts affecting sea ice and marine habitats.
Antarctic marine ecosystem : The interacting organisms and environmental processes of the Southern Ocean and its surrounding ice-covered waters. Its circumpolar ocean and different ice regime create a useful polar comparison.
Arctic phytoplankton : Microscopic photosynthetic organisms that drift in Arctic marine waters. Their blooms convert seasonal sunlight and nutrients into food-web energy.
Arctic marine habitats : Marine environments in the Arctic, including sea ice, open water, and seafloor habitats. Distinct habitats support different communities and ecological processes.
Arctic fisheries : Commercial and subsistence fishing in Arctic marine waters. Fishery decisions depend on species distributions, productivity, and food-web effects.
Arctic sea ice decline : The long-term reduction in Arctic sea-ice extent, thickness, and seasonal persistence. Less ice alters habitat availability, light conditions, and ecological timing.
Temperate marine ecosystem : A marine ecosystem in a temperate region, with seasonal conditions between tropical and polar extremes. Its milder temperatures and seasonal cycles contrast with Arctic constraints.
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