[R-sig-eco] GLMM

Maarten de Groot Maarten.deGroot at nib.si
Mon Aug 17 13:19:49 CEST 2009

Dear R list,

I am working on land use parameters affecting the habitat selection of a 
bird species. In GIS, I calculated the land use parameters 100 m around 
the individuals. In addition, I also calculated land use in 45 random 
points which are not covering each other in the area where the species 
was not found.
Because the individuals are aggregated in 9 sub populations, many 
samples are overlapping. When I would use a simple logistic regression 
for this would mean that there is pseudo replication. One way to handle 
this is Generalized linear mixed models (GLMM). Now is my question, 
whether I can use GLMM also when there are distinct groups for the 
presence data and not for the absence data. And how should I incorporate 
this in the data set? Are there any other methods to avoid this problem 
beside GLMM or averaging the parameters within the sub populations?

Looking forward to your help,


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