[R] Species accumulation curves with differential sampling effort

[David Winsemius]

On Feb 21, 2011, at 12:38 PM, Vanessa Francisco wrote:

> Hello! I'm a PhD student working with coral reef fish diversity in  
> Mexico.

Are you hiring?

> I want to do species accumulation curves but I have differential  
> sampling
> effort for each "sample".
> Do you know or have developed an R script that consider the  
> differential
> effort of each sample?
> PRIMER

... not familiar with that package.

> and other programs use each pack of species as a replica without the
> possibility of telling the program that the first group of species  
> (sample)
> was collected during a 30 minutes dive and the second group (sample)  
> was
> taking after 60 minutes dive and so on.

If you were using a glm model with a a log(poisson) link, then adding  
an offset term that was equal to log(time) should sensibly incorporate  
the information for the differential effort.


> I would really appreciate any kind of help!
> Best regards,
> Vanessa  Francisco <"><

-- 

David Winsemius, MD
West Hartford, CT