Short Answer TypeApart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
Predators play an important role in:
1. Maintaining the prey population and regulating intra-species competition. For example, if tigers are removed from a forest, spotted deer will multiply rapidly.
2. Indicating ecological disturbances. Usually, predators are small in number and highly sensitive to ecological changes, owing to their excessive adaptation. For example, Gharials (freshwater predators) start dying rapidly as soon as a river starts getting polluted, thus indicating a disturbance in the ecosystem.
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated?
Long Answer TypeShort Answer TypeLong Answer TypeExplain 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?(a) Explain primary productivity and the factors that influence it.
(b) Describe how do oxygen and chemical composition of detritus control decomposition?
Short Answer TypeWith the help of a flow chart, show the phenomenon of biomagnification of DDT in an aquatic food chain.
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