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Overdispersion of body size in Australian desert lizard communities at local scales only: no evidence for the Narcissus effect

Rabosky, Daniel L.; Reid, Julian; Cowan, Mark A.; Foulkes, Jeff

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Both local and regional processes may contribute to community diversity and structure at local scales. Although many studies have investigated patterns of local or regional community structure, few have addressed the extent to which local community structure influences patterns within regional species pools. Here we investigate the role of body size in community assembly at local and regional scales in Ctenotus lizards from arid Australia. Ctenotus has long been noted for its exceptional...[Show more]

dc.contributor.authorRabosky, Daniel L.
dc.contributor.authorReid, Julian
dc.contributor.authorCowan, Mark A.
dc.contributor.authorFoulkes, Jeff
dc.date.accessioned2015-12-10T22:27:29Z
dc.identifier.issn0029-8549
dc.identifier.urihttp://hdl.handle.net/1885/54230
dc.description.abstractBoth local and regional processes may contribute to community diversity and structure at local scales. Although many studies have investigated patterns of local or regional community structure, few have addressed the extent to which local community structure influences patterns within regional species pools. Here we investigate the role of body size in community assembly at local and regional scales in Ctenotus lizards from arid Australia. Ctenotus has long been noted for its exceptional species diversity in the Australian arid-zone, and previous studies have attempted to elucidate the processes underlying species coexistence within communities of these lizards. However, no consensus has emerged on the role of interspecific competition in the assembly and maintenance of Ctenotus communities. We studied Ctenotus communities at several hundred sites in the arid interior of Australia to test the hypothesis that body sizes within local and regional Ctenotus assemblages should be overdispersed relative to null models of community assembly, and we explored the relationship between body size dispersion at local and regional scales. Results indicate a striking pattern of community-wide overdispersion of body size at local scales, as measured by the variance in size ratios among co-occurring species. However, we find no evidence for body size overdispersion within regional species pools, suggesting a lack of correspondence between processes influencing the distribution of species phenotypes at local and regional scales. We suggest that size ratio constancy in Ctenotus communities may have resulted from contemporary ecological interactions among species or ecological character displacement, and we discuss alternative explanations for the observed patterns.
dc.publisherSpringer
dc.sourceOecologia
dc.subjectKeywords: arid environment; body size; coexistence; community structure; desert; dispersion; hypothesis testing; interspecific competition; lizard; species diversity; animal; article; Australia; biological model; body size; ecosystem; lizard; meta analysis; physiol Character displacement; Community assembly; Competition; Null model; Regional diversity
dc.titleOverdispersion of body size in Australian desert lizard communities at local scales only: no evidence for the Narcissus effect
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume154
dc.date.issued2007
local.identifier.absfor060807 - Animal Structure and Function
local.identifier.ariespublicationU1408929xPUB295
local.type.statusPublished Version
local.contributor.affiliationRabosky, Daniel L., Cornell University
local.contributor.affiliationReid, Julian, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationCowan, Mark A., WA Department of Environment and Conservation
local.contributor.affiliationFoulkes, Jeff, SA Department for Environment and Heritage
local.description.embargo2037-12-31
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage561
local.bibliographicCitation.lastpage570
local.identifier.doi10.1007/s00442-007-0849-1
dc.date.updated2015-12-09T09:41:17Z
local.identifier.scopusID2-s2.0-36448934524
CollectionsANU Research Publications

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