Hello,
I am actually trying to perform accumulation curves with the function 
"accumcomp" (package BiodiversityR). I am working on a data set species 
- sampling date - sampling sites and I would like to see the impact of 
sampling pressure (increasing sampling date) on species richness. 
Nevertheless, all my sites belong to different climatic and edaphic 
contexts which naturally  leads to differences in the size of the 
habitat species pools i.e. the number of species potentially able to 
colonize my site and consequently on species richness occuring in my 
different sites. So, when plotting my accumulation curves instead of 
having the"species richness" in y and "number of sampling dates" in x, I 
would like to have y= "% of total species richness encountered within 
the site" and x="number of sampling dates".
I don't know how to change the code "accumcomp" or "accumresult" 
(BiodiversityR package) or "specaccum" (vegan package, because the two 
first functions of BiodiversityR are based on the third one). Please, 
does anyone have any idea?

Thanks

Michaël
-- 
Michaël Aubert
Maître de Conférences
Groupe de Recherche Ecodiv, UPRES-EA 1293
Fédération de Recherche SCALE (FED 4116)
UFR Sciences & Techniques, Université de Rouen
76821 Mont Saint Aignan
Tel: 33+(0)232769447 - Fax: 33+(0)235146655



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