Data/hora: 08/06/2024 18:04:43

Provedor de dados: | 5
País: | France
Título: | Implications of morphological and functional traits for trophic relationships within fish communities and marine trophic network architecture
Autores: | Cachera, Marie.
Data: | 2013-12-18
Ano: | 2013
Palavras-chave: | Communauté; Morphologie; Réseau trophique; Niche; Traits fonctionnels; Manche Est; Community; Morphology; Trophic network; Niche; Functional traits; Eastern English Channel.
Resumo: | A current issue in ecology is to understand the contribution of biodiversity to ecosystem functioning and notably to comprehend how inter- and intra-specific trait variation affects trophic interactions between individuals and species, the trophic organization of communities and trophic network architecture. Particularly, morphology has historically been considered as a main determinant of organisms’ ecology, which led to the field of ecomorphology, and, from a functional perspective, is expected to influence trophic relationships and other ecological functions performed by species. This thesis aimed at studying the trophic organization of a marine fish community and its dependency on morphological and functional trait variation between and within species. The associated trophic network revealed a meta-community structure, including two sub-networks along a coastal-offshore gradient. Species trophic niche breadth and individual trophic niche variation increased together, a pattern relying partly on species functional identity and the sex, body size and habitat of individuals. Contrary to phylogeny, species morphology was a relevant proxy for functional identity. Finally, morphology seemed the main source of variability in individual trophic relationships within the assemblage, but a large part of diet variation remained unexplained suggesting that critical factors had been neglected, notably behaviour. These results allow understanding better the role of morphological and functional diversity in the structure of marine trophic networks and may help to predict their spatio-temporal dynamics and their responses to perturbations.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00195/30603/29069.pdf
Editor: | Université Sciences et Technologies de Lille
Relação: | http://archimer.ifremer.fr/doc/00195/30603/
Formato: | application/pdf
Fonte: | 2013 Université de Lille 1