Αποτελέσματα Αναζήτησης
Polar bears, the iconic species of the Arctic, are the marine mammal that causes the most concern with regards to climate change and sea ice loss. The most ice-bound of the marine mammals, polar bears migrate hundreds and thousands of miles across sea ice.
1 Ιαν 2018 · Eleven species of Arctic marine mammals are highly associated with, or dependent on, sea ice for key aspects of their life history including foraging, reproduction, and movement. Approximately 24 other species forage in the Arctic seasonally.
Seven species of marine mammals live in the Arctic year-round – the bowhead whale, beluga whale, narwhal, ringed seal, beaded seal, walrus, and polar bear - and many more migrate to the Arctic seasonally.
Marine mammals are top predators in Arctic marine ecosystems and are key to ecosystem survival; Many Arctic marine mammal species are an important resource and hold special cultural significance in Arctic communities. Bowhead whale. Photo: Amy Brower, Alaska Fisheries Science Center, NOAA Fisheries Service Polar bear. Photo: Kit M. Kovacs ...
1 Μαρ 2008 · As highly derived long-lived (i.e., K-selected) species, Arctic marine mammals are ill equipped to respond quickly to rapid climate change. The ecological scale of marine mammals, based on their natural histories, ranges from years to decades and from tens to thousands of kilometers .
Arctic marine mammals are well adapted to the vagaries, fluctuations, and natural cycles of the Arctic Ocean. Climate change is impacting sea ice, posing a risk to Arctic marine food webs and ice-dependent species such as Arctic cod. 2 Large species are more impacted by disturbance and changes in the Arctic Ocean since they migrate long ...
1 Μαρ 2008 · This review deals only with the evolutionary history of core Arctic marine mammals: polar bear (Ursus maritimus), walrus (Odobenus rosmarus), bearded seal (Erignathus barbatus), harp seal (Pagophil...
