Niches & competition (article) | Ecology | Khan Academy
https://www.khanacademy.org/science/ap-biology/ecology-ap/community-ecology/a/niches-competition
WEBFeb 22, 2011 · In interspecies competition, two species use the same limited resource. Competition has a negative effect on both of the species (-/- interaction). A species' niche is basically its ecological role, which is defined by the set of conditions, resources, and interactions it needs (or can make use of).
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