Document Detail


Trophic partitioning in tropical rain forest birds: insights from stable isotope analysis.
MedLine Citation:
PMID:  12802673     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Bird communities reach their highest taxonomic and trophic diversity in tropical rain forest, but the use of different foraging strategies to meet food requirements in such competitive environments is poorly understood. Conventional dietary analyses are poorly suited to investigate dietary patterns in complex systems. We used stable carbon ((13)C/(12)C) and nitrogen ((15)N/(14)N) isotope analysis of whole blood to examine avian trophic patterns and sources of diet in the tropical rain forest of Los Tuxtlas, Veracruz, Mexico. We used stable nitrogen isotope analysis to delineate trophic levels, and stable carbon isotope analysis to distinguish the relative contribution of C-3 and CAM/C-4 ultimate sources of proteins to diets. There was large inter- and intraspecific variation in whole blood delta(13)C and delta(15)N values in 23 species of birds. Stable nitrogen isotope analysis separated birds into several trophic levels, including species that obtained their dietary protein mostly from plants, insects or a combination of both food sources. Stable carbon isotope analysis showed that most birds fed on C3-based foods but Stub-tailed Spadebills (Platyrinchus cancrominus) included C-3- and C-4/CAM-specialist individuals. Our analyses provided insights into the nutritional contribution of plant and animal sources of protein and distinguish their photosynthetic origin over relatively long average time periods.
Authors:
L Gerardo Herrera; Keith A Hobson; Malinalli Rodríguez; Patricia Hernandez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-06-11
Journal Detail:
Title:  Oecologia     Volume:  136     ISSN:  0029-8549     ISO Abbreviation:  Oecologia     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-08-07     Completed Date:  2004-01-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  439-44     Citation Subset:  IM    
Affiliation:
Instituto de Biología, Universidad Nacional Autónoma de Mexico, Apartado Postal 70-153, 04510 Mexico, Distrito Federal, Mexico. gherrera@ibiologia.unam.mx
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MeSH Terms
Descriptor/Qualifier:
Animals
Birds*
Carbon Isotopes / analysis
Diet*
Dietary Proteins
Food Chain*
Nitrogen Isotopes / analysis
Photosynthesis
Plants, Edible
Tropical Climate
Chemical
Reg. No./Substance:
0/Carbon Isotopes; 0/Dietary Proteins; 0/Nitrogen Isotopes

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


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