Keystone Species Role in Biodiversity — NEET Biology
📚 Practice ConceptPredators also help in maintaining species diversity in a community, by reducing the intensity of competition among competing prey species. In the rocky intertidal communities of the American Pacific Coast the starfish Pisaster is an important predator. In a field experiment, when all the starfish were removed from an enclosed intertidal area, more than 10 species of invertebrates became extinct within a year, because of interspecific competition.
Which of the following statements correctly describe aspects of predation in ecological interactions? S1: Predators are important in maintaining species diversity within a community by mediating competition among various prey species. S2: The term "prudent predators" refers to their evolutionary tendency to overexploit prey populations to maximize their own fitness. S3: Many successful biological control programs in agriculture utilize predators to regulate the population densities of target pests. S4: In a broad ecological context, herbivores are generally classified separately from predators because they typically do not kill their food source directly. S5: The Monarch butterfly acquires its distasteful chemical during its adult stage by feeding on specific poisonous plants, deterring avian predators.
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