Arthropod diversity is governed by bottom-up ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Arthropod diversity is governed by bottom-up and top-down forces in a tropical agroecosystem
Auteur(s) :
Jacquot, Maxime [Auteur correspondant]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Université de La Réunion [UR]
Massol, Francois [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Muru, David [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Derepas, Brice [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Tixier, Philippe [Auteur]
Fonctionnement écologique et gestion durable des agrosystèmes bananiers et ananas [UR GECO]
Deguine, Jean-Philippe [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Université de La Réunion [UR]
Massol, Francois [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Muru, David [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Derepas, Brice [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Tixier, Philippe [Auteur]
Fonctionnement écologique et gestion durable des agrosystèmes bananiers et ananas [UR GECO]
Deguine, Jean-Philippe [Auteur]
Peuplements végétaux et bioagresseurs en milieu tropical [UMR PVBMT]
Titre de la revue :
Agriculture, Ecosystems & Environment
Pagination :
106623
Éditeur :
Elsevier
Date de publication :
2019
Mot(s)-clé(s) en anglais :
Plant diversity
Mango
Ecosystem functioning
Food web
Landscape
Species richness
Mango
Ecosystem functioning
Food web
Landscape
Species richness
Discipline(s) HAL :
Sciences de l'environnement/Biodiversité et Ecologie
Sciences du Vivant [q-bio]/Sciences agricoles/Agronomie
Sciences du Vivant [q-bio]/Ecologie, Environnement/Ecosystèmes
Sciences du Vivant [q-bio]/Sciences agricoles/Agronomie
Sciences du Vivant [q-bio]/Ecologie, Environnement/Ecosystèmes
Résumé en anglais : [en]
Understanding the factors underlying biodiversity patterns is crucial to develop sustainable agroecosystems conserving diversity and the services it provides. The aim of our study was to identify multi-trophic interactions ...
Lire la suite >Understanding the factors underlying biodiversity patterns is crucial to develop sustainable agroecosystems conserving diversity and the services it provides. The aim of our study was to identify multi-trophic interactions between arthropod trophic guilds in a tropical agroecosystem, while taking the effects of farming practices and landscape complexity into account. To do so, we conducted an experiment in 10 mango orchards on Reunion Island during three consecutive years. In each orchard, we monitored arthropod diversity in two different plots: one plot which maintained customary farming practices and one plot where conservation biological control practices were applied. We used structural equation models to identify the variables that affected the abundance and diversity of different arthropod trophic guilds in two strata in mango orchards: the surface of the ground vs. the mango tree canopy. Links were found to be weak at the trophic guild abundance level on both the surface of the ground and in the mango tree canopy. Conversely, biodiversity mediated complex bottom-up and top-down interactions, including diversity cascades, which differed significantly between the strata. A remarkable difference in the forces affecting herbivore and predator diversity was observed. Herbivore diversity was controlled by top-down forces on the ground, whereas predator diversity was controlled by bottom-up forces in the canopy. These results demonstrate that biodiversity depends on both top-down and bottom-up effects in the tropical agroecosystem community studied here. Interaction directions indicate that conservation biological control based on diverse plant community in ground cover can be an effective lever to foster parasitoid diversity, but not for predatory diversity.Lire moins >
Lire la suite >Understanding the factors underlying biodiversity patterns is crucial to develop sustainable agroecosystems conserving diversity and the services it provides. The aim of our study was to identify multi-trophic interactions between arthropod trophic guilds in a tropical agroecosystem, while taking the effects of farming practices and landscape complexity into account. To do so, we conducted an experiment in 10 mango orchards on Reunion Island during three consecutive years. In each orchard, we monitored arthropod diversity in two different plots: one plot which maintained customary farming practices and one plot where conservation biological control practices were applied. We used structural equation models to identify the variables that affected the abundance and diversity of different arthropod trophic guilds in two strata in mango orchards: the surface of the ground vs. the mango tree canopy. Links were found to be weak at the trophic guild abundance level on both the surface of the ground and in the mango tree canopy. Conversely, biodiversity mediated complex bottom-up and top-down interactions, including diversity cascades, which differed significantly between the strata. A remarkable difference in the forces affecting herbivore and predator diversity was observed. Herbivore diversity was controlled by top-down forces on the ground, whereas predator diversity was controlled by bottom-up forces in the canopy. These results demonstrate that biodiversity depends on both top-down and bottom-up effects in the tropical agroecosystem community studied here. Interaction directions indicate that conservation biological control based on diverse plant community in ground cover can be an effective lever to foster parasitoid diversity, but not for predatory diversity.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Source :
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