Theory predicts that habitat fragmentation and varying corridor length and width will affect animal populations in adjoining habitat patches due to varying migration rates. Previous work on the moss/microarthropod microcosm showed that connecting moss patches with moss corridors maintained species richness and individual species abundance. By contrast, in this study there was little evidence for differences in species richness between landscapes of varying connectivity and corridor length and width. The ? diversity, the cumulative species richness of entire connected systems, followed the same pattern. Similar non-significant results were obtained for species abundance. Contrary to a previous study, I found no evidence that populations [...]