If you are a man displaying symptoms of an enlarged prostate, you should contact your doctor and consider getting tested. Symptoms primarily involve difficulty urinating: pain, a slow flow, trouble starting and stopping, or a bloody discharge.
Importance of polar bears. Polar bears are at the top of the food chain and have an important role in the overall health of the marine environment. Over thousands of years, polar bears have also been an important part of the cultures and economies of Arctic peoples.Polar bears depend on sea ice for their existence and are directly impacted by climate changeâserving as an important indicator species.ffects of Climate Change. Polar bears depend on sea ice as a platform from which to hunt seals, rest and breed. For more than 20 years the summer sea ice has been decreasing in size and melting for longer periods of time.
Biotic factors are the living things that make up an ecosystem, such as plants and animals. Abiotic factors are the nonliving material or chemical factors in an ecosystem, like the weather. The natural ecosystem of a polar bear is the Arctic tundra.now is an abiotic factor in the Arctic ecosystem. Unlike other bears in warmer parts of the world, polar bears have white fur. This serves to help them blend into the snow in their natural habitat. This adaptation is necessary because of their huge size.