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Overdispersion of Body Size in Australian Desert Lizard Communities at Local Scales Only: No Evidence for the Narcissus Effect

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 speci... Full description

Journal Title: Oecologia 2007-12-01, Vol.154 (3), p.561-570
Main Author: RABOSKY, Daniel L
Other Authors: MARK, Julian Reid , COWAN, A , FOULKES, Jeff
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Berlin: Springer
ID: ISSN: 0029-8549
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recordid: cdi_proquest_miscellaneous_68538617
title: Overdispersion of Body Size in Australian Desert Lizard Communities at Local Scales Only: No Evidence for the Narcissus Effect
format: Article
creator:
  • RABOSKY, Daniel L
  • MARK, Julian Reid
  • COWAN, A
  • FOULKES, Jeff
subjects:
  • Amphibia. Reptilia
  • Animal and plant ecology
  • Animal, plant and microbial ecology
  • Animals
  • Australia
  • Biological and medical sciences
  • Body Size
  • Community Ecology
  • Datasets
  • Deserts
  • Ecological competition
  • Ecological genetics
  • Ecological modeling
  • Ecosystem
  • Fundamental and applied biological sciences. Psychology
  • General aspects
  • Interspecific competition
  • Lacertilia
  • Lizards
  • Lizards - physiology
  • Meta-Analysis as Topic
  • Models, Biological
  • Narcissus
  • Species
  • Synecology
  • Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
  • Weights and Measures
ispartof: Oecologia, 2007-12-01, Vol.154 (3), p.561-570
description: 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 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.
language: eng
source:
identifier: ISSN: 0029-8549
fulltext: no_fulltext
issn:
  • 0029-8549
  • 1432-1939
url: Link


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titleOverdispersion of Body Size in Australian Desert Lizard Communities at Local Scales Only: No Evidence for the Narcissus Effect
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descriptionBoth 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.
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languageeng
publisherBerlin: Springer
subjectAmphibia. Reptilia ; Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Australia ; Biological and medical sciences ; Body Size ; Community Ecology ; Datasets ; Deserts ; Ecological competition ; Ecological genetics ; Ecological modeling ; Ecosystem ; Fundamental and applied biological sciences. Psychology ; General aspects ; Interspecific competition ; Lacertilia ; Lizards ; Lizards - physiology ; Meta-Analysis as Topic ; Models, Biological ; Narcissus ; Species ; Synecology ; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution ; Weights and Measures
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descriptionBoth 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.
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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.
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doi10.1007/s00442-007-0849-1