[R-sig-eco] Compare 4 comunity by similarity index

[Roman Luštrik]

Upon a cursory look, it looks like a Poisson regression problem to me
("ANOVA") - if you want to compare sites using quantity as explanatory
variables. If you decide to go this way, have a look at `glm(..., family =
"poisson")` function.

Cheers,
Roman

On Fri, May 29, 2015 at 12:13 AM, Marcelo <marcelolaia at gmail.com> wrote:

> Hello,
>
> I have four communities (site) in my project, like this:
>
> site          specie      quantity
> 1               A           100
> 1               B             1
> 1               C            23
> 1               D            56
> 2               A             0
> 2               B           110
> 2               C             3
> 2               D             6
> 3               A            10
> 3               B             1
> 3               C             2
> 3               D             1
> 4               A             2
> 4               B             1
> 4               C             3
> 4               D             0
>
> How I could compare this four communities? I had calculated Shannon H'
> index, but it is only intra community, not to compare inter communities. I
> have read about quantitative Czekanowski index, but, it compare only two
> communities.
>
> Please, what I could calculate from my data to compare they?
>
> Thank you very much.
>
> Marcelo
>
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-- 
In God we trust, all others bring data.

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