The word ‘‘ecosystem’’ was first coined by
Weaver and Clements
A.G. Tansley
E.P. Odum
By all the above
It’s obvious.
Idea of productivity of an ecosystem can be had from
$A$ : During succession, nutrient availability decreases while biomass level increases.
$R$ : $NCP$ (Net community productivity) remains same during succession.
Hydrological cycle comprises of two overlapping cycles
Eutrophic lakes means
The early settlers on a barren area are
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