Life history traits predict relative abundance in an assemblage of forest caterpillars
2010; Wiley; Linguagem: Inglês
10.1890/09-1894
ISSN1939-9170
Autores Tópico(s)Forest ecology and management
ResumoEcologyVolume 91, Issue 11 p. 3274-3283 Article Life history traits predict relative abundance in an assemblage of forest caterpillars Eric M. Lind, Eric M. Lind Behavior, Ecology, Evolution and Systematics Program, University of Maryland, College Park, Maryland 20742 USA Present address: Smithsonian Environmental Research Center, 647 Contees Wharf Road, Edgewater, Maryland 21037 USA. E-mail: [email protected]Search for more papers by this authorPedro Barbosa, Pedro Barbosa Department of Entomology, 4112 Plant Sciences Building, University of Maryland, College Park, Maryland 20742 USASearch for more papers by this author Eric M. Lind, Eric M. Lind Behavior, Ecology, Evolution and Systematics Program, University of Maryland, College Park, Maryland 20742 USA Present address: Smithsonian Environmental Research Center, 647 Contees Wharf Road, Edgewater, Maryland 21037 USA. E-mail: [email protected]Search for more papers by this authorPedro Barbosa, Pedro Barbosa Department of Entomology, 4112 Plant Sciences Building, University of Maryland, College Park, Maryland 20742 USASearch for more papers by this author First published: 01 November 2010 https://doi.org/10.1890/09-1894.1Citations: 7 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Species in a given trophic level occur in vastly unequal abundance, a pattern commonly documented but poorly explained for most taxa. Theoretical predictions of species density such as those arising from the metabolic theory of ecology hold well at large spatial and temporal scales but are not supported in many communities sampled at a relatively small scale. At these scales ecological factors may be more important than the inherent limits to energy use set by allometric scaling of mass. These factors include the amount of resources available, and the ability of individuals to convert these resources successfully into population growth. While previous studies have demonstrated the limits of macroecological theory in explaining local abundance, few studies have tested alternative generalized mechanisms determining abundance at the community scale. Using an assemblage of forest moth species found co-occurring as caterpillars on a single host plant species, we tested whether species abundance on that plant could be explained by mass allometry, intrinsic population growth, diet breadth, or some combination of these traits. We parameterized life history traits of the caterpillars in association with the host plant in both field and laboratory settings, so that the population growth estimate was specific to the plant on which abundance was measured. Using a generalized least-squares regression method incorporating phylogenetic relatedness, we found no relationship between abundance and mass but found that abundance was best explained by both intrinsic population growth rate and diet breadth. Species population growth potential was most affected by survivorship and larval development time on the host plant. 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