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 »

An invasive species is any organism that causes damage to an ecosystem in which it did not originate. An invasive species may cause reduced biodiversity and extinction of other plants and animals in a new environment inc... More »

A habitat is the natural environment of a plant, animal or other organism. Every living thing has its own habitat. More »

In ecology, limiting factors are environmental variables that can determine or negatively affect the population of different organisms or species in an ecosystem. Limiting factors can be either abiotic or biotic variable... More »

Biotic factors are living organisms in an ecosystem, such as animals and plants. Abiotic factors are non-living physical and chemical elements in an ecosystem, and they can have a major influence on living organisms. Exa... More »

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The decomposers in an underwater ecosystem are animal-like organisms called protists, fungi and bacteria. Referred to as saprotrophs, these organisms decompose dead matter from higher-level plants and animals, facilitati... More »

A pond ecosystem is a freshwater ecosystem in which communities of organisms rely on each other and the water environment for their nutrients and survival. Pond ecosystems have both abiotic and biotic components. More »