What is an edge species ........

Environment and Ecology Biodiversity

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What is an edge species?

It is the species that is the most abundant in a junction between two ecosystems.

It is the species that is least abundant in a junction between two ecosystems.

It is a species at the brink of extinction.

it is a species that lies on the top of the hierarchy in a food pyramid.

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Explanation:

Sometimes the number of species and the density of population of some of the species in an ecotone is much higher than either community. This is called edge effect. The organisms which occur primarily as most abundantly in ecotone are called edge species. Therefore, answer A is justified.