Short Answer TypeApart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
What is primary productivity? Why does it vary in different types of ecosystems?
Primary productivity is the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. Primary productivity varies in different types of ecosystem because it depends on:
a) The plant species inhabiting the area.
b) The variety of environmental factors.
c) The photosynthetic capacity of plants.
d) The availability of nutrients.
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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