Does the number of species in a community really matter to the functioning of the ecosystem ? Explain.

Identify true or false statements. Correct each false statement to make it true. (i) Number of species in a community really matter to the functioning of the ecosystem. (ii) David Tilman proved that decreased diversity contributed to higher productivity. (iii) Rich biodiversity is not essential for ecosystem health but required for survival of human race of earth. (iv) Species which are dangerously harmful beings and their interests can be thought of deliberate extinction.

The functional aspects of ecosystem are

State the functions of decomposers in an ecosystem.

Find the odd one out with respect to the functions of an ecosystem.

Niche of a species in an ecosystem refers to its

Select the odd one with respect to the functional aspect of the ecosystem.

In an ecosystem the function of the producers is to

Assertion: During an ecological succession, the number of species increases, the community biomass increases and the community's ratio of respiration to photosynthesis also increases.

Keystone species in an ecosystem are those:

Keystone species in an ecosystem are those: