GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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High during developmental stages and low at mature stage.
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Remaining unchanged at all stages.
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> 1 or < 1 at developmental stages and approximately 1 at mature stage.
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Low during developmental stages and high at mature stage.
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Detailed explanation-1: -Succession is the process of ecosystem recovery after some disturbance. Biomass is at maximum in the undisturbed ecosystem; it increases up to this maximum during succession. Plant productivity also grows, especially if the plant cover was destroyed substantially by the disturbance.
Detailed explanation-2: -climax, in ecology, the final stage of biotic succession attainable by a plant community in an area under the environmental conditions present at a particular time.
Detailed explanation-3: -Species are classified into one of nine Red List Categories: Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least Concern, Data Deficient and Not Evaluated. Vulnerable, Endangered and Critically Endangered species are considered to be threatened with extinction.
Detailed explanation-4: -The functional changes include variations of energy flow and nutrient cycling with time. As depicted from the table 19.2, in the early stages of autotrophic succession, the rate of primary production or gross photosynthesis (P) exceeds the rate of community respiration (R), so that the P/R ratio is greater than 1.