Document Detail

Negative plant-soil feedback predicts tree-species relative abundance in a tropical forest.
MedLine Citation:
PMID:  20581819     Owner:  NLM     Status:  MEDLINE    
The accumulation of species-specific enemies around adults is hypothesized to maintain plant diversity by limiting the recruitment of conspecific seedlings relative to heterospecific seedlings. Although previous studies in forested ecosystems have documented patterns consistent with the process of negative feedback, these studies are unable to address which classes of enemies (for example, pathogens, invertebrates, mammals) exhibit species-specific effects strong enough to generate negative feedback, and whether negative feedback at the level of the individual tree is sufficient to influence community-wide forest composition. Here we use fully reciprocal shade-house and field experiments to test whether the performance of conspecific tree seedlings (relative to heterospecific seedlings) is reduced when grown in the presence of enemies associated with adult trees. Both experiments provide strong evidence for negative plant-soil feedback mediated by soil biota. In contrast, above-ground enemies (mammals, foliar herbivores and foliar pathogens) contributed little to negative feedback observed in the field. In both experiments, we found that tree species that showed stronger negative feedback were less common as adults in the forest community, indicating that susceptibility to soil biota may determine species relative abundance in these tropical forests. Finally, our simulation models confirm that the strength of local negative feedback that we measured is sufficient to produce the observed community-wide patterns in tree-species relative abundance. Our findings indicate that plant-soil feedback is an important mechanism that can maintain species diversity and explain patterns of tree-species relative abundance in tropical forests.
Scott A Mangan; Stefan A Schnitzer; Edward A Herre; Keenan M L Mack; Mariana C Valencia; Evelyn I Sanchez; James D Bever
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Nature     Volume:  466     ISSN:  1476-4687     ISO Abbreviation:  Nature     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-05     Completed Date:  2010-09-24     Revised Date:  2014-09-17    
Medline Journal Info:
Nlm Unique ID:  0410462     Medline TA:  Nature     Country:  England    
Other Details:
Languages:  eng     Pagination:  752-5     Citation Subset:  IM    
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MeSH Terms
Computer Simulation
Feedback, Physiological
Food Chain
Insects / physiology
Models, Biological
Population Density
Seedling / growth & development
Soil / analysis*
Soil Microbiology*
Species Specificity
Trees / classification*,  growth & development*,  microbiology,  parasitology
Tropical Climate*
Vertebrates / physiology
Grant Support
Reg. No./Substance:
Comment In:
Nature. 2010 Aug 5;466(7307):698-9   [PMID:  20686557 ]

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