Dear List, I have some statistical issues with my metacommunity experiment. My design is the following: Each metacommunity set consists of five patches, which are connected with tubes allowing for two dispersal rates (low and high) among these patches. Furthermore, I have two different nutrient supply modes: uniform and heterogeneous. My response variables are biovolume and species richness.
Now, I would like to test if biovolume (biov) is significant different among these patches as a function of the dispersal rates (low, high) and nutrient supply modes (uniform, heterogenous). Therefore, I used a three-way ANVOA: model1<-aov(biov~disp*treat*patch, data=loc28), where disp (=dispersal rate: low and high), treat (=nutrient supply: uniform and heterogeneous) and patch (= five patches). I got the comment to use a nested ANOVA, since patches within a metacommunity are not independent due to connection via dispersal. So, I used following code: model2<-aov(biov~disp*treat+patch/treat, data=loc28) but I guess this is not the right way, since disp and treat are both independent factors and nested in patch. I would appreciate if someone has an idea to solve this problem or can recommend another package. Cheers, Nils Nils Gülzow Müllerstr. 21 26384 Wilhelmshaven Tel.: 04421/3597682 E-mail: nils.guel...@gmx.de [[alternative HTML version deleted]]
_______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology