s PERU wrote:
From: Nicolas PERU
Subject: Re: [ECOLOG-L] Simpson's Index of Diversity_aquatic plants
To: ECOLOG-L@LISTSERV.UMD.EDU
Date: Friday, August 10, 2012, 4:27 AM
Dear Todd,
I don't really understand how you can obtain a negative Simpson's Index value.
Simpson's index
Dear Todd,
I don't really understand how you can obtain a negative Simpson's Index
value. Simpson's index formula is :
H = 1-sum(pi²) where pi is the relative abundance of the ith species. So,
H is always greater or equal to 0.
You can always use Simpson's index as far as you have a set o
I am studying how the biodiversity within the weedbeds of a freshwater lake
has changed and one parameter I would like to investigate is species
diversity using Simpson's Index. The data I have available is the wet
weights and dry weights for each species from quadrat sampling. I do not
have availa
