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SlideshowReport

Biodiversity and the unevenly distribution on the planet

Description
Precise quantitative measurements are difficult
About 1.75 million species identified; estimates of 3 to 10 million species, maybe 100 million
Incomplete for several reasons
Some areas of Earth little explored
Many species are tiny and overlooked
Many organisms are difficult to identify

Latitudinal gradient = species richness increases towards the equator
Plant productivity  and climate stability play key roles

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