The changes that occur in successive seral st | vedclass

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(D) During ecological succession,the community undergoes a series of sequential changes known as seral stages until it reaches a stable climax communi

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$I, II$ and $III$

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(D) During ecological succession,the community undergoes a series of sequential changes known as seral stages until it reaches a stable climax community.$1$. $I.$ Changes in species diversity occur as pioneer species are replaced by more complex organisms.$2$. $II.$ There is a gradual increase in the number of species and the total number of organisms as the habitat becomes more favorable.$3$. $III.$ As the community matures,the total biomass increases significantly due to the accumulation of organic matter and the development of complex vegetation structures.Therefore,all three statements are correct.

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.
Choose the correct option.

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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.Choose the correct option.