ecological niche definition

The word niche comes from the French word nicher, which means “to nest.” An ecological niche describes how a species interacts with, and lives in, its habitat. In ecology, a niche is the role or job of a species in a habitat. The ecological niche describes how a species interacts within an ecosystem. An ecological niche is the role and position a species has in its environment; how it meets its needs for food and shelter, how it survives, and how it reproduces. Biotic factors affecting a species' niche include food availability and predators. The niche of a species depends on both biotic and abiotic factors, which affect the ability of a species to survive and endure. It describes how an organism or population responds to the distribution of resources and competitors (for example, by growing when resources are abundant, and when predators, parasites and pathogensare scarce) and how it in turn alters those same factors (for example, limiting access to resources by other organisms, acting as a food source for predators and a consumer of prey). notes for ecological niche Different organisms may compete for the same niche. ecological niche The place or function of a given organism within its ecosystem. However, in biology and ecology, a niche pertains to the following: (1) the specific area where an organism inhabits, (2) the role or function of an organism or species in an ecosystem, or (3) the interrelationship of a species with all the biotic and abioticfactors affecting it. "The type and number of variables comprising the … Niche is defined in general sense as a cavity, hollow, or recess, especially in a wall. Literally, ecological niche is "a special place", but in ecology, a niche is defined as role of the species or population in ecosystem. In ecology, a niche is the match of a species to a specific environmental condition. The assessment of management practices on rangelands exploitation using state and transition model in central arid regions of Iran

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