Krill decline raises concern for Antarcticâs food chain
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the heart of the rich Antarctic food chain that nourishes whales, seals and penguins â-ave declined by more than 80 percent in the past 25 years in key ocean regions, according
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The worst of the ozone hole has pulled back once more to Antarctica this southern spring, leaving behind a shadow of uncertainty for the people living at the bottom of the Americas.
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Icebergs that break off Antarctica and drift away turn out to be hotspots of life in the cold southern ocean, researchers report.
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A marked decline in sea ice off Alaska's coast is not enough to take the drastic step of listing polar bears &#151; a species dependent on ice &#151; as threatened, critics said Thursday at the first of three public hearings on the proposal.
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A key food source for Antarctic seals, whales and penguins has declined about 80 percent since the 1970s in ocean waters near the Antarctic Peninsula, researchers report.
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Sediments extracted from the Antarctic sea floor show the world's largest ice shelf has disintegrated and reappeared many times in the past.
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The Arctic ice cap is melting faster than scientists had expected and will shrink 40 percent by 2050 in most regions, with grim consequences for polar bears, walruses and other marine animals, according to government researchers.
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Eskimos in the Arctic are worried about changes in the wildlife resulting from climate change and the gradual increase in contaminants.
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The collapse of two Antarctic ice shelves is offering scientists a glimpse of rarely seen species&#8212;and at how pristine ocean ecosystems respond to sudden change.&#149; See photos >>
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Scientists say there has been a worrying drop in the amount of CO2 soaked up by the world's oceans.
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Glaciers in Antarctica are thinning faster than they did in the 1990s and researchers have discovered an unexpected folded section deep beneath the ice cap, findings that may indicate the ice is less stable than had been thought.
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Global warming and disappearing sea ice in the Southern Ocean are causing food shortages that could threaten Antarctic whales, seals and penguins, scientists said Wednesday.
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PUNTA ARENAS, Chile -- The worst of the ozone hole has pulled back once more to Antarctica this southern spring, leaving behind a shadow of uncertainty for the people living at the bottom of the Americas.
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Frogs, butterflies, polar bears, and penguins are dying out from climate change much faster than researchers had previously expected, a new study shows.
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The extinction of whole species, once specific to isolated islands, is becoming a trend across continents.
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A 30-mile maze canyons in Antarctica was carved out of bedrock by the catastrophic draining of subglacial lakes during global warming between 12 million and 14 million years ago, according to university researchers who warn a similar event today could have serious environmental consequences.
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It comes and goes, say boffins The Ross Ice Shelf in Antarctica has melted and reformed many times in geologically recent history, scientists have found.â¦