The polar bear is part of the Arctic ecosystem and a food web through which carbon cycles. The ecosystem comprises phytoplankton, algae, a variety of animals and the natural environment.Know More
The polar bear itself has no natural predators within its ecosystem and is thus supported by every other member of it, from the phytoplankton and algae that convert carbon dioxide from the ocean into organic carbon tissue to fish that feed on them, walruses and whales.
Unfortunately, scientific knowledge of the Arctic ecosystem is limited, owing to its inhospitable weather and the expense of mounting expeditions. Nevertheless, research has demonstrated conclusively that global warming is gradually and irrevocably destroying it.Learn more about Bears
A food web is a comprehensive map of how energy moves, in the form of food, throughout an ecosystem, while a food chain is one specific path through the web. Most food webs on Earth derive their energy primarily, if not exclusively, from sunlight. That energy is captured by plants via photosynthesis and then distributed to the consumers in the environment.Full Answer >
Some grizzly bears and black bears are able to climb trees. Because of this, it is not wise for someone trying to escape from a bear to climb a tree.Full Answer >
A black bear chooses both caves and hollowed-out trees when seeking out a den for hibernation, according to the National Park Service. Brown bears dig their dens at the base of large trees surrounded by dense vegetation. Neither species of bear lives in the same location when not hibernating.Full Answer >
According to Dave Fellows of the United States Geological Survey, a group of bears is called a sloth or a sleuth. Although bears are often considered loners, they can be quite social.Full Answer >