Data collected between 2007 and 2015 reveal that polar bear numbers have not declined as predicted and no subpopulation has been extirpated. Several subpopulations expected to be at high risk of decline remained stable and five showed increases in population size. Another at-risk subpopulation was not counted but showed marked improvement in reproductive parameters and body condition with less summer ice. As a consequence, the hypothesis that repeated summer sea ice levels of below 5 mkm2 will cause significant population declines in polar bears is rejected, a result that indicates the ESA and IUCN judgments to list polar bears as threatened based on future risks of habitat loss were scientifically unfounded and that similar predictions for Arctic seals and walrus may be likewise flawed.
Steve is a New Hampshire resident, blogger, and activist. A member of the 603 Alliance, NHCMP, NHRVC, LFGC, and the host of GrokTALK! Please Note: My opinions are my own and not those of my Family, employers, politicians, campaigns, or other contributors or commenters at GraniteGrok