Sea-ice diminution, associated with climate change, reduces polar bears' access to denning areas and could negatively affect the survival of cubs. There are clear linkages between population biology and current anthropogenic threats, and we suggest that future research and management should focus on ...
is the combination of human population growth and resource exploitation. The human population requires resources to survive and grow, and those resources are being removed unsustainably from the environment. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introdu...
Are bears at the top of the food chain? Polar bears are at the top of the polar bear food chain. They are one of several apex predators in the Arctic food web, alongside orca whales and hawks. What are three things polar bears eat? Polar bears eat a wide range of organisms, which ...
The best of National Geographic delivered to your inbox Sign up for more inspiring photos, stories, and special offers from National Geographic. Sign Up
look closely, gaming for good parallels the sustainability strategies peddled by big corporations — as such, a company that focuses on building a stronger, greener and more ethically sound business is more believable than a hollow corporate social responsibility initiative that sa...
Polar bears face new toxic threats ; Industrial chemicals migrate north in the wind, ocean currentsMarla Cone
Given the long marine food chains and the biomagnification of most contaminants, top predators such as Inuits, polar bears and toothed whales end up with extremely high exposures posing risks of effects. Here we give a brief overview of the current knowledge on POPs and mercury in the Arctic ...