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In the grass lands, trees do not replace the grasses as a part of an ecological succession because of
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- Limited sun light and paucity of nutrients
- None of the options
- Insect and fungi
- Water limits and fire
Correct Option: D
Grass ecosystems are an early stage of succession in regions where the mature ecosystems are forests. However, grass ecosystems are climax ecosystems in grassland regions, where there is not enough rainfall to support a forest. Due to limiting factors such as water scarcity and forest fire, a grassland ecosystem changes to a desert ecosystem. The ecological succession of grassland is desert. It is, however, notable that the soil of grassland ecosystem is rich in nutrients and organic matters and provides the largest biomass.
