MadSci Network: Environment & Ecology

Subject: Ecology question: the ''simpson's index'' doesn't seem to work...?

Date: Thu Jun 15 03:28:57 2000
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Area of science: Environment & Ecology
ID: 961054137.En

The diversity of an ecosystem can be assessed using the Simpson's index
diversity=N(N-1)/sigma n(n-1)

N= count of all individuals, n= count of each species

when you plug data into this equation the answers do not make sense.

An ecosystem of just 10 ants can be more diverse than an ecosystem of 
various creatures...

Re: Ecology question: the ''simpson's index'' doesn't seem to work...?

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