Question

This is the importance of species diversity
(A) Species interacts with its environment and hence performs some functions
(B) Species never interact with the environment
(C) Species minimize interaction with their environment and hence performs certain functions
(D) Species does not perform functions though it interacts with the environment

Answer 1

Hint:
Species diversity is the ecological character of a community. Depending upon the locality species of a community are composed. The complexity of a community is measured by species composition.

Complete step by step answer:
Species diversity is measured by species richness ad by species evenness. Greater numbers of species it has and more even abundance of these species lead to greater species diversity. Species diversity has two components: 1) Species richness: Refers to the number of species in a community. 2) Species evenness: refers to the abundance of different species in a community. Evenness is highest when species are present in almost equal proportion.
Species diversity can be studied at 3 levels: 1) Alpha diversity: Refers to the number of species within a habitat or a local site. 2) Beta diversity: Refers to the total number of different species present between 2 habitats. 3) Gamma diversity: Refers to the total number of different species present in all habitats within a region. This term was introduced by R.H. Whittaker.

Option ‘A’ is correct

Note:
If both communities A and B contain 5 species each. That means both have the same degree of species richness. But in community A, one species Is present in large numbers and the others are few. Whereas, in community B, all five species are present in the same proportion. As a result, the species evenness of community B is higher than that of community A.