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If top predators decrease in a forest what effect may occur on ecological balance?

Answer and explanation

Correct answer: Prey species numbers may become unbalanced

Direct answer: Option A, prey species numbers may become unbalanced. A top predator is an animal near the upper level of a food chain, such as a tiger hunting deer. Predators remove some prey and help keep their population within limits. If predators decrease, fewer prey are hunted, so prey numbers may rise too much. This can cause overgrazing, reduce vegetation, and disturb other organisms; in some cases prey may also later decline because food becomes scarce. Option A correctly describes this ecological imbalance. Option B is wrong because rainfall does not stop immediately merely because predators decrease. Option C is wrong because trees do not cut themselves; tree loss may occur indirectly through excessive grazing, not automatically. Option D is wrong because river salinity is mainly related to evaporation, seawater intrusion, minerals, and water flow, not directly to predator numbers. Memory cue: predators regulate prey, and prey regulate vegetation.

Related tags

Top PredatorsFood ChainEcological Balance

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