Direct and indirect effects of climate and habitat factors on butterfly diversity
Menedez, Rosa; González-Megías, Adela; Collingham, Yvonne; Fox, Richard; Roy, David B.; Ohlemüller, Ralf; Thomas, Chris D.. 2007 Direct and indirect effects of climate and habitat factors on butterfly diversity. Ecology, 88 (3). 605-611. 10.1890/06-0539Full text not available from this repository.
Many factors, including climate, resource availability, and habitat diversity, have been proposed as determinants of global diversity, but the links among them have rarely been studied. Using structural equation modeling (SEM), we investigated direct and indirect effects of climate variables, host-plant richness, and habitat diversity on butterfly species richness across Britain, at 20-km grid resolution. These factors were all important determinants of butterfly diversity, but their relative contributions differed between habitat generalists and specialists, and whether the effects were direct or indirect. Climate variables had strong effects on habitat generalists, whereas host-plant richness and habitat diversity contributed relatively more for habitat specialists. Considering total effects (direct and indirect together), climate variables had the strongest link to butterfly species richness for all groups of species. The results suggest that different mechanistic hypotheses to explain species richness may be more appropriate for habitat generalists and specialists, with generalists hypothesized to show direct physiological limitations and specialists additionally being constrained by trophic interactions (climate affecting host-plant richness).
|Programmes:||CEH Programmes pre-2009 publications > Biodiversity|
|Format Availability:||Electronic, Print|
|Additional Keywords:||butterfly species richness, direct and indirect climate effects, habitat diversity, host-plant richness|
|NORA Subject Terms:||Meteorology and Climatology
Ecology and Environment
|Date made live:||22 Aug 2007 15:32|
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