Eichornia crassipes is a

The changes that occur in successive seral stages to reach a climax community are

$I.$ changes in the diversity of species of organisms

$II.$increase in the number of species and organisms

$III.$ increase in the total biomass

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In India coniferous forests are found in

Composition and structure of communities constantly change in response the changing environmental conditions. These changes lead finally to a community that is in near equilibrium with the environment and that is called a.......

Rhododendron is the characteristic vegetation of

The circulation or cycling of elements in an ecosystem is known as