When an important predator starfish 'Piasater' was experimentally removed from an enclosed idertidal area of communities of the American Pacific coast, it resulted in extinction of +10 species of invertebrates with in a year? why?
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"piasater", in this case, acts as an invasive species. An invasive species is a non native species introduced in a habitat where it has no natural competitors.The result- a rapid increase in population of the invasive species, causing them to prey on, or even in some cases, take the place of, important species in the food chain, which in turn affects those species that prey on it, or are preyed on by it, resulting in mass extinctions.
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Answer:because of interspecific competition
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Due to absence of predator, interspecific competition occurs between prey and herbivore plant and more than 10 species get extinction
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