Question

State how increasing species diversity can affect the ecosystem.
(A) It does not increase the efficiency and productivity of an ecosystem
(B) It increases only the efficiency and not the productivity of an ecosystem
(C ) It increases the productivity and efficiency of an ecosystem
(D) It only increases the productivity and efficiency of an ecosystem

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:
According to the biological species concept, species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups. Simply, species diversity refers to the variety of species within a region i.e., species richness. However, in the broad sense, species diversity includes species richness as well as species evenness. We can include taxonomic (phylogenetic) diversity also under species diversity. Taxonomic diversity describes the genetic relationship between different groups of species.
Biodiversity is used in ecosystem services as it is essential for the maintenance of ecosystem services and their sustainable utilisation. Biodiversity is also used to prevent natural disasters. It is an important source of food, medicines, and industrial materials and also has cultural and aesthetic benefits. The beauty of nature is something many people are enthralled by.
Species diversity increases the productivity and efficiency of an ecosystem as dominant species comprises the greatest biomass in an ecosystem, such species help in obtaining better resources, resisting diseases, and keeping in check the competition.

Option ‘C’ is correct

Note:
Beavers remove sticks, leaves, and bark of trees from the surface of the forest and use these to build a dam in a nearby stream or river. This resulting pond provides a suitable habitat for a variety of aquatic animals. They, therefore, increase biodiversity and help in flood control.