Are polar bears changing their diet?

Are polar bears changing their diet?

Deep in the Western Hudson Bay, populations of bearded seals are declining. As polar bears prey on these seals, researchers wonder how similar changes in prey availability could potentially affect the large mammals’ diet. Typically, researchers use stable isotopes — elements that naturally occu…
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from
http://www.commercialspy.com/are-polar-bears-changing-their-diet/

from
http://onlineshoppingnewsfeed.blogspot.com/2016/05/are-polar-bears-changing-their-diet.html