Abstract:
:Effects of host plant α- and β-diversity often confound studies of herbivore β-diversity, hindering our ability to predict the full impact of non-native plants on herbivores. Here, while controlling host plant diversity, we examined variation in herbivore communities between native and non-native plants, focusing on how plant relatedness and spatial scale alter the result. We found lower absolute magnitudes of β-diversity among tree species and among sites on non-natives in all comparisons. However, lower relative β-diversity only occurred for immature herbivores on phylogenetically distinct non-natives vs. natives. Locally in that comparison, non-native gardens had lower host specificity; while among sites, the herbivores supported were a redundant subset of species on natives. Therefore, when phylogenetically distinct non-natives replace native plants, the community of immature herbivores is likely to be homogenised across landscapes. Differences in communities on closely related non-natives were subtler, but displayed community shifts and increased generalisation on non-natives within certain feeding guilds.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Burghardt KT,Tallamy DWdoi
10.1111/ele.12492subject
Has Abstractpub_date
2015-10-01 00:00:00pages
1087-98issue
10eissn
1461-023Xissn
1461-0248journal_volume
18pub_type
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