English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/131755
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Abiotic, Biotic, and Evolutionary Control of the Distribution of C and N Isotopes in Food Webs

AutorLaiolo, Paola ; Illera, Juan Carlos ; Meléndez; Leandro; Segura, Amalia; Obeso, José Ramón
Palabras claveBiogeochemical fluxes
Elevation gradients
Grazing
Nitrogen cycle
Trophic relationships
Evolutionary legacy
Fecha de publicación22-dic-2014
EditorAmerican Society of Naturalists
CitaciónThe American Naturalist 185(2): 169-182 (2015)
ResumenEcosystem functioning depends on nutrient cycles and their responses to abiotic and biotic determinants, with the influence of evolutionary legacies being generally overlooked in ecosystem ecology. Along a broad elevation gradient characterized by shifting climatic and grazing environments, we addressed clines of plant N and C∶N content and of δ13C and δ15N in producers (herbs) and in primary (grasshoppers) and secondary (birds) consumers, both within and between species in phylogenetically controlled scenarios. We found parallel and significant intra- and interspecific trends of isotopic variation with elevation in the three groups. In primary producers, nutrient and isotope distributions had a detectable phylogenetic signal that constrained their variation along the environmental gradient. The influence of the environment could not be ascribed to any single factor, and both grazing and climate had an effect on leaf stoichiometry and, thus, on the resources available to consumers. Trends in consumers matched those in plants but often became nonsignificant after controlling for isotopic values of their direct resources, revealing direct bottom-up control and little phylogenetic dependence. By integrating ecosystem and mechanistic perspectives, we found that nutrient dynamics in food webs are governed at the base by the complex interaction between local determinants and evolutionary factors.
Versión del editorhttp://dx.doi.org/10.5061/dryad.g4p92
URIhttp://hdl.handle.net/10261/131755
DOI10.5061/dryad.g4p92
ISSN0003-0147
Aparece en las colecciones: (INCAR) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Abiotic_biotic_Laiolo_2015.pdf377,33 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.