Bio essay draft - ecosystem because they use resources...

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Niche: Ecology. the position or function of an organism in a community of plants and animals. To be considered a habitat, an area must be large enough to support a population over a long period of time. For animals such as brown bears, which require a number of integrally related habitats for their activities, it is more accurate to describe the "place they inhabit" with the more expansive term of landscape. Thus, bears are species of landscapes rather than habitat types. If an animal's habitat is its "address." its niche is "the way it makes its living." The term niche refers to the role an organism plays in an ecosystem, or how it functions in the world. An organism's niche includes physical factors such as its food preferences and requirements for shelter and biological and behavioral factors such as how it acquires its food and how it relates to other organisms. The concept of niches suggests that similar species with different niches are able to coexist in one
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Unformatted text preview: ecosystem because they use resources differently. Brown bears and black bears often coexist in parts of Southeast Alaska because they use different resources. Black bears feed and raise their young primarily in forested areas, where they are able to climb trees for protection from people or other animals that may threaten them. The larger, more aggressive brown bears forage and raise their young in alpine and more open areas. Here the brown bears' aggressive nature and larger size serve as their defense from threats. Bears live in forested lands capes In summer/falltravel on ridglines to find beech trees and climb to the top and break branches in toward them to get the beech nuts. They prefer dense deciduous and coniferous forests. In winter . .they find dens in caves in ledge, in overtured tree roots, In spring they are found in wetlands, near streams and riverbanks, foraging for roots, berries, small mammals....
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