39 They are species that have a disproportionately large effect on their environment relative to th...........

Environment and Ecology Concept of Ecosystems

'They are species that have a disproportionately large effect on their environment relative to their abundance.Such species are important in determining the ability of a large number of other species to persist in the community.' The above paragraph describes which of the following type of species?

Threatened species

Indicator species

Keystone species

Flagship species

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Explanation:

A keystone species is a species that plays a critical role in maintaining the structure of an ecological community and whose impact on the community is greater than would be expected based on its relative abundance or total biomass. Although predators are common keystone species, they are not the only members of an ecological community that can serve this role. Herbivores too can be keystone species.