FOREST ECOLOGY
FOREST SUCCESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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are not eaten by grazing herbivores
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have a lower population density
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provide shade for grasses and shrubs
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only grow in a specific nutrient rich soil
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Detailed explanation-1: -The trees do not replace grasses as they require more water than grasses and this would lead to water scarcity for other species. Also, trees are prone to catch fire and the fire spreads swiftly. Due to these reasons, trees do not replace the grasses as a part of ecological succession.
Detailed explanation-2: -The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment. Secondary succession occurs after a disturbance such as a forest fire, where there is still some organic matter to allow new plants to grow.
Detailed explanation-3: -During primary succession on land, fungi and lichen are the most common pioneer species. They break down minerals in the rock to form soil, which allow subsequent communities to colonize the area.