Vertical distribution of different species occupying different levels in a biotic community is known as

Succession showing changes in communities at a place is called

$A$ plant being eaten by a herbivore,which in turn is eaten by a carnivore,constitutes a:

Given below is a figure of an ecosystem. Answer the following questions.
$(i)$ What type of ecosystem is shown in the figure?
$(ii)$ Name any plant that is characteristic of such an ecosystem.

Which ecosystem has the highest biomass?

In water-receiving regions,what do forests regulate?