According to the competitive exclusion principle, also known as Gause's Law, if two species occupy the same niche, they inevitably compete for the dominance of this niche until one of them brings about the extinction of ... More »

Deer live in mixed forests habitats, on wooded farmlands and even in suburban areas of established cities. In winter they take to coniferous forests for shelter. Deer are a prey species, providing food for coyotes, bobca... More »

The ecological species concept defines a species as a group of interrelated organisms that occupy or adapt to a single niche. For example, if a population of birds exploits two different food sources, it represents two d... More »

Competitive exclusion, also known as Gause's Law, is an ecological concept positing that two species that occupy a similar niche in the same location cannot coexist stably for extended periods of time. One species will e... More »

Biodiversity is important in ecosystems because it prevents extinction of species, allows organisms to adapt to changes in the environment and provides a wide range of materials and foods for survival. Biodiversity is ca... More »

A habitat is where an organism or a community of organisms lives, and a niche is the specific place an organism has in an ecosystem. A habit can help define the niche of particular creature but cannot describe it entirel... More »

Environmental homeostasis, or balance, is maintained via an elaborate network of negative-feedback loops. A negative-feedback loop is a system in which the output of one cycle reduces or reverses the input of the next cy... More »