“For Polar Bears, a Climate Change”
By: James Gorman
Source: NY Times
http://www.nytimes.com/2014/09/23/science/for-polar-bears-a-climate-change-twist.html?ref=science&_r=0
Polar Bears have adapted to the cold and wintery weather. The
Western shore of the Hudson Bay breaks up each summer, which leaves the polar
bears swimming to shore. This has been a dangerous climate change and is
affecting the polar bears. A warming planet leaves the polar bears hungry
because of shortage on sea lions and no survival because of the heat. Since there
are no sea lions, polar bears have found another animal to hunt and eat which
are snow geese. Ice is melting earlier than it should results in bears arriving
to shore early, which gives them a benefit to hunt the snow geese. The climate
change has resulted in polar bears arriving to shore at a time when snow geese
go through their summer breeding period. With 75,000 geese being hatched there
is a new supply of food for these hungry bears. Climate change is playing a
huge role into this because animals such as the geese and polar bears are not
going to be able to survive with these quick climate changes. Dr. Rockwell has
been counting geese since the summer of 1969. He has been following the
footsteps of geese migrating from one place to another because of the quick
climate changes. In the sixties there were about 1.5 million geese that
migrated and now 15 million migrated this year. Dr. Rockwell has concluded that
these geese are migrating from Louisiana and Texas where they spend their
winters feeding on spartina (salt hay or salt meadow cordgrass). Then they
migrate North in spring to nest and raise their offspring’s on grass. Polar
bears are “food-deprived” in the summer because there is not enough food, and
snow geese are their “backup” food.


