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Explain how does : (a) a primary success...

Explain how does : (a) a primary succession start on a bare rock and reach a climax community?
(b) the algal bloom eventually choke the water body in an industrial area?

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How does primary succession take place on a bare rock ( xerarch).

How does algal bloom destroy the quality of a fresh water body ? Explain.

Read the following statements carefully : ( i ) primary succession is a very slow process taking thousands of years for the climax to be reached. (ii) The energy at a higher trophic level is always more than at a lower level (iii) Bacterial and fungal enzymes degrade detritus into simple inorganic substances. This process is called fragmentation . (iv ) All succession, whether taking place in water or on land, proceeds to a similar climax community : the mesic condition . Which of the two above statements are correct ?

Starting from the pioneer species, trace the sequence that follows in an ecological succession on a bare rock, until climax community is reached in an ecosystem. Name this type of succession.

Explain the cause of algal bloom in a water body. How does it affect an ecosystem?

Read the following statements and state how many of them are true ? (P) primary succession , is a very slow process taking thousands of years for the climax to be reached . (Q) All succession whether taking place in water or land proceeds ti a similar climax community, the mesic. (R) As succession proceeds, the number and types of animals and decomposers also change. (S) Saprophytes are not given any place in the ecological pyramids as they play no role in the ecosystem.

Pick out the correct option from (a) to (e). A. Primary succession begins in areas where natural communities have been destroyed. B. Hydrarch succession takes place in water. C. The climax community is the community that is in near equilibrium with the immediate environment. D. In newly cooled lava secondary succession occurs.