Document Detail

On the biogeography of salt limitation: a study of ant communities.
MedLine Citation:
PMID:  19004798     Owner:  NLM     Status:  MEDLINE    
Sodium is an essential nutrient whose deposition in rainfall decreases with distance inland. The herbivores and microbial decomposers that feed on sodium-poor vegetation should be particularly constrained along gradients of decreasing sodium. We studied the use of sucrose and NaCl baits in 17 New World ant communities located 4-2757 km inland. Sodium use was higher in genera and subfamilies characterized as omnivores/herbivores compared with those classified as carnivores and was lower in communities embedded in forest litter than in those embedded in abundant vegetation. Sodium use was increased in ant communities further inland, as was preference for the baits with the highest sodium concentration. Sucrose use, a measure of ant activity, peaked in communities 10-100 km inland. We suggest that the geography of ant activity is shaped by sodium toxicity near the shore and by sodium deficit farther inland. Given the importance of ants in terrestrial ecosystems, changing patterns of rainfall with global change may ramify through inland food webs.
Michael Kaspari; Stephen P Yanoviak; Robert Dudley
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-11-11
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  105     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2008-12-17     Revised Date:  2013-06-04    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  17848-51     Citation Subset:  IM    
Graduate Program in Ecology and Evolutionary Biology, Department of Zoology, University of Oklahoma, Norman, OK 73019, USA.
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MeSH Terms
Ants / classification,  metabolism*
Food Chain
Sodium Chloride / metabolism*
Sucrose / metabolism
Reg. No./Substance:
57-50-1/Sucrose; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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