Dynamic spatial interactions between the native invader Brown-headed Cowbird and its hosts

Autor: Jens-Christian Svenning, Jean-Yves Barnagaud, Julien Papaïx, Olivier Gimenez
Přispěvatelé: Biodiversité, Gènes et Communautés, Institut National de la Recherche Agronomique (INRA), Section for Ecoinformatics & Biodiversity, Department of Bioscience, Aarhus University, BIOlogie et GEstion des Risques en agriculture (BIOGER), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Biostatistique et Processus Spatiaux (BIOSP), Mathématiques et Informatique Appliquées du Génome à l'Environnement [Jouy-En-Josas] (MaIAGE), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Paul-Valéry - Montpellier 3 (UM3), AgroParisTech-Institut National de la Recherche Agronomique (INRA), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Biodiversité, Gènes & Communautés (BioGeCo), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB), Aarhus University [Aarhus], Biostatistique et Processus Spatiaux (BioSP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Diversity and Distributions
Diversity and Distributions, Wiley, 2015, 21 (5), pp.511-522. ⟨10.1111/ddi.12275⟩
Barnagaud, J-Y, Papaix, J, Gimenez, O & Svenning, J-C 2015, ' Dynamic spatial interactions between the native invader Brown-headed Cowbird and its hosts ', Diversity and Distributions, vol. 21, no. 5, pp. 511-522 . https://doi.org/10.1111/ddi.12275
ISSN: 1366-9516
1472-4642
DOI: 10.1111/ddi.12275⟩
Popis: Aim We investigated the contribution of parasitism by the Brown-headed Cowbird (Molothrus ater) to its host population dynamics at a subcontinental scale. We predicted that the growth rate of cowbirds would be most strongly related to the abundance of forest insectivorous hosts and that landscape fragmentation would have opposite effects on the parasite and its hosts. Furthermore, due to the species' sedentarity and low rates of adult dispersal, we expected that cowbird population dynamics would be structured at local, rather than large spatial scales. Location The Great Plains, United States. Methods We modelled jointly the population dynamics of cowbird and its 58 most common hosts, accounting for effects of landscape fragmentation and cowbird dispersal. We used Bayesian inference to evaluate this model on 76 routes of the North American Breeding Bird Survey (BBS), surveyed each year from 2001 to 2011. We then analysed covariations between the demographic dynamics of cowbirds and their hosts in a multivariate ecological trait space. Results Contrary to most of its hosts, the cowbird had positive growth rates in man-disturbed, fragmented landscapes, which covaried at small spatial scales. The large-scale effects of parasitism were limited, as few host species affected, or were affected by cowbird growth rates. However, significant cowbird–host relationships were structured by ecological traits: cowbird growth rates were most increased by the abundance of ecological generalists, while hosts were affected by cowbird abundance irrespective of their position in the functional space. Main conclusions Cowbirds parasitize opportunistically the hosts occurring in disturbed landscapes. The large-scale effects of nest parasitism therefore depend probably on landscape structure and other environmental factors operating at local scales. We suggest that efforts to counter the local and continental declines of many passerine species should include parasitism among the biotic components of landscape disturbance.
Databáze: OpenAIRE
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