However, according to NSIDC Masie figures,
polar bear habitat at mid-May registers about 12 million km2, just as it did in 2006 (although it is distributed a little differently); other data show spring extent has changed little since a major decline occurred in 1989, despite ever - rising CO2 levels.
Not exact matches
During the summer months, you can cool off
at the new «Journey to Churchill Northern Species» exhibit that features expanded
polar bear, Arctic fox, wolf, musk ox, caribou, snowy owl, and seal
habitats.
That corresponds to a roughly 3 1/2 week shift
at either end — and seven weeks of total loss of good sea ice
habitat for
polar bears — over the 35 years of Arctic sea ice data.
The Interior Department lists the
polar bear as a «threatened» species — one
at risk of becoming endangered — due to dangerous declines in their sea ice
habitat
Sea ice is a crucial part of the ecosystems
at both poles, providing
habitat and influencing food availability for penguins,
polar bears and other native species.
Regardless of whether hybridization rates may increase,
at least for
polar bears any effect they might have on population welfare pale by comparison to the loss of
habitat and subsequent loss of foraging ability.
Polar bears are being driven from their usual
habitats on the disappearing
polar ice
at the same time that grizzlies are moving farther north because of global warming, resulting in cross-breeding.
Today, I'll take a look
at sea ice and ringed seal
habitat in the Gulf of Boothia and M'Clintock Channel, as well as information from a study on
polar bear diets, which together shine some light on why the Gulf of Boothia is such a great place for
polar bears.
Bottom line: Barents Sea
polar bears are loyal to this region because the eastern portion has the
habitat they require to thrive even when sea ice cover in the western portion essentially disappears for thousands of years
at a time.
That's
at least according to a recent study that estimates that by 2075,
habitat reduction will have led to the utter elimination of adequate raising grounds for
polar bear young, dooming the species.
This loss of
habitat puts
polar bears at risk of becoming endangered in the foreseeable future, the standard established by the ESA for designating a threatened species.»
â $ œFuture challenges for conserving
polar bears and their Arctic
habitat will be greater than
at any time in the past because of the rapid rate
at which environmental change appears to be occurring.