Short Answer TypeApart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
State the relation between gross and net primary productivity.
The relation between the gross and net primary productivity can be shown as:
(a) Gross primary productivity is the rate of production of organic matter during photosynthesis.
(b)Net primary productivity is the available biomass for the consumption to heterotrophs (herbivores or decomposers).
Gross primary productivity minus the respiratory losses is the net primary productivity
NPP = GPP-R, where,
NPP = Net primary productivity
GPP = Gross primary productivity
R = Respiration
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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