Theory provides more precise estimates of large-area biodiversity

Ask biologists how many species live in a pond, a grassland, a mountain range or on the entire planet, and the answers get increasingly vague. Hence the wide range of estimates for the planet's biodiversity, predicted to be between 2 million and 50 million species.

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<p><a href="http://www.physorg.com/news166379160.html">Theory provides more precise estimates of large-area biodiversity</a></p> <p>Ask biologists how many species live in a pond, a grassland, a mountain range or on the entire planet, and the answers get increasingly vague. Hence the wide range of estimates for the planet's biodiversity, predicted to be between 2 million and 50 million species.</p>