All articles tagged with #krill
Using 30 years of satellite data plus color analysis of penguin guano, researchers show Adélie penguin diets track sea-ice conditions: more fish when ice is plentiful, more krill when ice is scarce. Penguins that rely more on krill are in decline, highlighting climate-driven shifts in the Antarctic food web and increasing competition for krill amid fisheries.
Tracking 23 Adélie penguins across 6,000+ dives beneath Antarctic sea ice shows prey can become much harder to reach even when abundant: krill shift deeper or farther in response to repeated hunting, keeping feeding rates steady but forcing penguins to work harder to find food. The study highlights prey accessibility as a key driver of predator foraging, with implications for climate change and krill fisheries.
New satellite data indicate that rapid Antarctic sea-ice loss is reshaping the Southern Ocean’s food web: krill decline as ice-free waters expand, salps bloom and dominate in those waters, phytoplankton increases follow, and the shift could weaken carbon sequestration and disrupt predators across the marine ecosystem.
A male humpback whale has set a record for the longest migration ever recorded for the species, traveling over 8,000 miles from Colombia to Zanzibar. This extraordinary journey highlights the impact of climate change on marine life, as rising ocean temperatures disrupt krill populations, a primary food source for humpback whales. Scientists suggest that the whale's migration may be a response to food scarcity, changes in breeding habitats, and increased competition among males, reflecting broader shifts in marine ecosystems due to global warming.
As global warming changes the survival-of-the-fittest game in Antarctica, one particular species of penguin, the gentoo, is modeling a poignant lesson for humanity: adapt or die. While Adélie and chinstrap penguins remain stuck in their ancient ways, the much more flexible gentoo penguins are ranging further and further south. As they show willingness to chase new prey or abandon a nest to increase the odds of long-term survival, their numbers are exploding. The gentoos are an example of what humans in the world of terrifying UN climate reports call the “hard” and “soft” limits of adaptation.