Trophic transfer of biodiversity effects: functional equivalence of prey diversity and enrichment?

Abstract : Producer diversity is frequently assumed to be detrimental to herbivores, because less edible taxa are more likely to dominate diverse communities. Many producers are, however, complementary in their resource use, and primary production is often positively related to producer diversity. We performed an experiment with microalgae and a generalist herbivore to explore the hypothesis that such positive effects are transferred up the food chain and are functionally comparable to effects of enrichment with a limiting resource. In both absence and presence of grazers, primary production was positively affected by both light supply and producer diversity. Survival, reproduction, and biomass of herbivores were also positively affected by light supply and producer diversity, with both factors contributing equally to grazer performance. We conclude that producer diversity can indeed have similar positive effects on secondary production as enrichment with a limiting resource and discuss conditions under which such positive effects are likely to dominate over negative ones.
Type de document :
Article dans une revue
Ecol Evol, 2012, 2 (12), pp.3110-22. 〈10.1002/ece3.415〉
Liste complète des métadonnées

Littérature citée [58 références]  Voir  Masquer  Télécharger

http://hal.univ-brest.fr/hal-00779774
Contributeur : Adminhal Univbrestbu <>
Soumis le : mardi 22 janvier 2013 - 15:39:44
Dernière modification le : jeudi 11 janvier 2018 - 06:22:24
Document(s) archivé(s) le : mardi 23 avril 2013 - 03:55:05

Fichier

ece30002-3110.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Stephan Behl, Vera Schryver, Sebastian Diehl, Herwig Stibor. Trophic transfer of biodiversity effects: functional equivalence of prey diversity and enrichment?. Ecol Evol, 2012, 2 (12), pp.3110-22. 〈10.1002/ece3.415〉. 〈hal-00779774〉

Partager

Métriques

Consultations de la notice

194

Téléchargements de fichiers

228