Nature World: Polar bears, walruses, seals and other Arctic marine mammals act as ecosystem sentinels, according to a new study, which suggests that the behaviors of the animals can be used to provide clues about how the ecosystem is responding to a changing climate.
The news was presented this week at the 2014 meeting of the American Association for the Advancement of Science in Chicago.
NOAA oceanographer Sue Moore presented the findings, highlighting how various Arctic marine mammals are responding to...