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How do ecologists estimate the total number of species present in the world?

2. How do ecologists estimate the total number of species present in the world?

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S Sonika

In order to estimate the number of species present on earth, ecologists statistically compare species richness of well-studied group of insects of tropical and temperate regions and these ratios are extrapolated with other groups of plants and animals to estimate the species richness found on Earth. As per estimates, about 7 million species are present on Earth.

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