Document Detail

Are most species small? Not within species-level phylogenies.
MedLine Citation:
PMID:  12065045     Owner:  NLM     Status:  MEDLINE    
The robust macro-ecological observation that there are more small-bodied species implies that small-bodied organisms have experienced elevated net rates of diversification. We investigate the role of body size in creating non-random differences in rates of cladogenesis using a set of 38 species-level phylogenies drawn from a range of animal groups. We use independent contrasts to explore the relationship between body size and species richness within individual phylogenies and across related sets of phylogenies. We also carry out a meta-analysis looking for associations between body size and species richness across the taxa. We find little evidence for increased cladogenesis among small-bodied organisms within taxa, and no evidence for any consistent differences between taxa. We explore possible explanations for the inconsistency of our findings with macro-ecological patterns.
C David L Orme; Nick J B Isaac; Andy Purvis
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Publication Detail:
Type:  Journal Article; Meta-Analysis; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  269     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-14     Completed Date:  2003-01-13     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1279-87     Citation Subset:  IM    
Department of Biological Sciences, Imperial College, Silwood Park, Ascot SL5 7PY, UK.
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MeSH Terms
Body Constitution*
Invertebrates* / classification,  genetics,  physiology
Species Specificity
Vertebrates* / classification,  genetics,  physiology

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