Nom du corpus

Corpus Systématique Animale

Titre du document

Variability in seed size selection by granivorous passerines: effects of bird size, bird size variability, and ecological plasticity

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Bird size
  • Ecological plasticity
  • Niche variation hypothesis
  • Seed-eating birds
  • Seed size selection
Nom du fichier dans la ressource
Oiseaux_v2b_02304
Auteur(s)
  • Mario Díaz
Affiliation(s)
  • Departamento de Biología Animal I (Vertebrados), Facultad de Biología, Universidad Complutense, 28040, Madrid, Spain
Résumé

The niche variation hypothesis predicts a direct relationship between intraspecific variability in feeding ecology and the variability of the morphological traits related to feeding behaviour. The following study tests this prediction by measuring in captivity the seed size preferences and the morphology of 9–11 individuals of seven specialized granivorous bird species. The average seed size preferences of these birds have previously been shown to be related to components of bill size. The ranges of seed sizes selected were related to the mean bill sizes of birds in a way that paralleled the patterns found when analysing average values. Bill and body size variability were not related, however, to the range of seed preferences after controlling for the significant mean-variance relationship showed by morphological traits. Thus, results do not support the niche variation hypothesis. the significant effect of average bill size on diet variability was consistent with the direct relationship between bird size and ecological plasticity expected on the basis of the shape of the family of functions relating seed size and seed profitability for different-sized birds. These findings suggest morphological mechanisms for ecological plasticity whose generality and evolutionary significance merit further research.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
E1C7C822202D464F64B7F4D063615A9A6AEC5EC6
Revue

Oecologia

Année de publication
1994
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.275
Sous-corpus
  • Oiseaux
Type de publication
Journal
ark:/67375/1BB-2NGX57RW-V
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