Invading from the garden？ A comparison of leaf herbivory for exotic and native plants in natural and ornamental settings  

作　　者：Stephen F. Matter Jessica R.Brzyski Christopher J. Harrison Sara Hyams Clement Loo Jessica Loomis Hannah R. Lubbers Leeann Seastrum Trevor I. Stamper Adam M. Stein Richard Stokes Brandy S. Wilkerson 

机构地区：[1]Department of Biological Sciences, University of Cincinnati, Cincinnati, USA

出　　处：《Insect Science》2012年第6期677-682,共6页昆虫科学（英文版）

摘　　要：The enemies release hypothesis proposes that exotic species can become in- vasive by escaping from predators and parasites in their novel environment. Agrawal et al. （Enemy release？ An experiment with congeneric plant pairs and diverse above- and below-ground enemies. Ecology, 86, 2979-2989） proposed that areas or times in which damage to introduced species is low provide opportunities for the invasion of native habitat. We tested whether ornamental settings may provide areas with low levels of herbivory for trees and shrubs, potentially facilitating invasion success. First, we compared levels of leaf herbivory among native and exotic species in ornamental and natural settings in Cincinnati, Ohio, United States. In the second study, we compared levels of herbivory for invasive and noninvasive exotic species between natural and ornamental settings. We found lower levels of leaf damage for exotic species than for native species; however, we found no differences in the amount of leaf damage suffered in ornamental or natural settings. Our results do not provide any evidence that ornamental settings afford additional release from herbivory for exotic plant species.The enemies release hypothesis proposes that exotic species can become in- vasive by escaping from predators and parasites in their novel environment. Agrawal et al. （Enemy release？ An experiment with congeneric plant pairs and diverse above- and below-ground enemies. Ecology, 86, 2979-2989） proposed that areas or times in which damage to introduced species is low provide opportunities for the invasion of native habitat. We tested whether ornamental settings may provide areas with low levels of herbivory for trees and shrubs, potentially facilitating invasion success. First, we compared levels of leaf herbivory among native and exotic species in ornamental and natural settings in Cincinnati, Ohio, United States. In the second study, we compared levels of herbivory for invasive and noninvasive exotic species between natural and ornamental settings. We found lower levels of leaf damage for exotic species than for native species; however, we found no differences in the amount of leaf damage suffered in ornamental or natural settings. Our results do not provide any evidence that ornamental settings afford additional release from herbivory for exotic plant species.

关 键 词：enemies release hypothesis forest HERBIVORY host plant SUBURBAN urban 

分 类 号：S680.2[农业科学—观赏园艺] Q959.848[农业科学—园艺学]