Short Answer TypeApart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated?
Long Answer TypeDescribe the advantages for keeping the ecosystems healthy.
The various advantages of keeping the ecosystems healthy are as follows:
1. Healthy ecosystem is the base for a wide range of economic, environmental and aesthetic goods and services.
2. The products of ecosystem processes are named as ecosystem services, as they are of great help to the organisms living within an ecosystem.
3. Healthy forest ecosystem purifies air and water.
4. It also mitigates droughts and floods and maintains the cycle nutrients.
5. Healthy ecosystem generates fertile soil, prevents soil erosion and provides wildlife habitat.
6. Maintenance of biodiversity is also an important aspect of healthy ecosystem.
7. It also provides aesthetic, cultural and spiritual values.
Short 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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