A : During succession,nutrient availability d | vedclass

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(D) During ecological succession,the nutrient availability generally increases because the accumulation of organic matter (humus) improves soil fertil

Vedclass · Accepted Answer

Both Assertion and Reason are incorrect.

Vedclass · Answer

(D) During ecological succession,the nutrient availability generally increases because the accumulation of organic matter (humus) improves soil fertility and nutrient cycling.Therefore,the Assertion is incorrect.During succession,as the community becomes more complex and reaches a climax state,the $NCP$ (Net Community Productivity) generally decreases because a larger portion of the gross primary productivity is consumed by the community for respiration and maintenance.Therefore,the Reason is also incorrect.Thus,both Assertion and Reason are incorrect.

$A$ : During succession,nutrient availability decreases while biomass level increases.
$R$ : $NCP$ (Net Community Productivity) remains same during succession.

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$A$ : During succession,nutrient availability decreases while biomass level increases.$R$ : $NCP$ (Net Community Productivity) remains same during succession.