Αποτελέσματα Αναζήτησης
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 ...
- Mammals
Arctic carnivorous mammals, especially marine, have...
- Mammals
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 2019 · Arctic animals include mammals such as the polar bear, Arctic fox, Arctic hare, caribou / reindeer, musk ox and wolverine; aquatic mammals such as the orca / killer whale, narwhal, beluga whale, walrus and numerous seal species; and birds such as the ptarmigan, bald eagle, Arctic tern and puffin.
Arctic carnivorous mammals, especially marine, have increasing levels of contaminants, notably organochlorines and heavy metals, as a result of increased delivery of these substances to the Arctic food web as airborne pollutants or in runoff from freshwater Arctic drainages.
Polar bears are classified as marine mammals Because they spend most of their lives on the sea ice of the Arctic Ocean depending on the ocean for their food and habitat, polar bears are the only bear species to be considered marine mammals.
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 ...
There are 12 species of marine mammals that regularly inhabit the Arctic: 4 species of whales, the polar bear, the walrus, and 6 species of ice-associated seals, Several addtional species (e.g. Sperm whales, Blue whales, Fin Whales, Humpback Whales, Killer Whales, Harbor Porpoise) are spotted occasionally or even regularly within marginal waters...
