Pisaster is a . . . . . . .

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(B) Pisaster is a genus of sea stars (starfish) found along the rocky intertidal zones of the Pacific coast of North America.It is a classic example o

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Species of starfish

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(B) Pisaster is a genus of sea stars (starfish) found along the rocky intertidal zones of the Pacific coast of North America.It is a classic example of a keystone species used in ecological studies.In an experiment conducted by Robert Paine,when all starfish (Pisaster) were removed from an enclosed intertidal area,more than $10$ species of invertebrates became extinct within a year due to interspecific competition.

Column-$I$	Column-$II$
$(i)$ Primary succession	$(i)$ Development of ecosystem
$(ii)$ Ecological succession	$(ii)$ Lichens
$(iii)$ Pioneer species on rocks	$(iii)$ Near to the equilibrium with the environment
$(iv)$ Climax community	$(iv)$ New species on bare environment

Similar Questions

$A$: Estuary constitutes one of the most productive ecosystems.
$R$: It represents a transition zone between two populations of a species.

Ecological succession is a

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

Which ecosystem is more stable?

Match the columns:

Column-$I$ Column-$II$

$(i)$ Primary succession $(i)$ Development of ecosystem

$(ii)$ Ecological succession $(ii)$ Lichens

$(iii)$ Pioneer species on rocks $(iii)$ Near to the equilibrium with the environment

$(iv)$ Climax community $(iv)$ New species on bare environment

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