FrenettePelletierSt-Laurent2020

Référence

Frenette, J., Pelletier, F., St-Laurent, M.-H. (2020) Linking habitat, predators and alternative prey to explain recruitment variations of an endangered caribou population. Global Ecology and Conservation, 22. (Scopus )

Résumé

Habitat loss, fragmentation and alteration are frequently identified as important threats to biodiversity, inducing major changes in the structure and composition of species communities and the resulting interspecific interactions. North American woodland caribou (Rangifer tarandus caribou) populations suffer from habitat modifications and most are currently in decline. It has been suggested that the conversion of old-growth coniferous forests into early-seral stages has increased cervid abundances, which have, in turn, stimulated a numerical response of predator populations, ultimately threatening caribou populations via a habitat-mediated apparent competition mechanism. Using a long-term dataset (1984–2012) of the Atlantic-Gaspésie caribou population, we quantified changes in interspecific interactions triggered by apparent competition between moose (Alces americanus) and caribou via the responses of two incidental predators, coyote (Canis latrans) and black bear (Ursus americanus). We also documented calf recruitment rates and analysed temporal trends (last three decades) in this vital rate. Inter-annual variations in autumn calf recruitment were mostly affected by the proxy of regional abundance of coyotes, which was highly correlated with moose and black bear proxies of abundance. The increase in coyote abundance proxy in the Gaspésie Peninsula following anthropogenic habitat modifications seems to be the main mechanism responsible for the current decline in the Atlantic-Gaspésie caribou population. Our analyses revealed some impacts of habitat alteration and the complexity of the resulting trophic cascades. © 2020 The Authors

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@ARTICLE { FrenettePelletierSt-Laurent2020,
    AUTHOR = { Frenette, J. and Pelletier, F. and St-Laurent, M.-H. },
    TITLE = { Linking habitat, predators and alternative prey to explain recruitment variations of an endangered caribou population },
    JOURNAL = { Global Ecology and Conservation },
    YEAR = { 2020 },
    VOLUME = { 22 },
    NOTE = { cited By 0 },
    ABSTRACT = { Habitat loss, fragmentation and alteration are frequently identified as important threats to biodiversity, inducing major changes in the structure and composition of species communities and the resulting interspecific interactions. North American woodland caribou (Rangifer tarandus caribou) populations suffer from habitat modifications and most are currently in decline. It has been suggested that the conversion of old-growth coniferous forests into early-seral stages has increased cervid abundances, which have, in turn, stimulated a numerical response of predator populations, ultimately threatening caribou populations via a habitat-mediated apparent competition mechanism. Using a long-term dataset (1984–2012) of the Atlantic-Gaspésie caribou population, we quantified changes in interspecific interactions triggered by apparent competition between moose (Alces americanus) and caribou via the responses of two incidental predators, coyote (Canis latrans) and black bear (Ursus americanus). We also documented calf recruitment rates and analysed temporal trends (last three decades) in this vital rate. Inter-annual variations in autumn calf recruitment were mostly affected by the proxy of regional abundance of coyotes, which was highly correlated with moose and black bear proxies of abundance. The increase in coyote abundance proxy in the Gaspésie Peninsula following anthropogenic habitat modifications seems to be the main mechanism responsible for the current decline in the Atlantic-Gaspésie caribou population. Our analyses revealed some impacts of habitat alteration and the complexity of the resulting trophic cascades. © 2020 The Authors },
    AFFILIATION = { Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, Centre for Northern Studies, 300 Allée des Ursulines, Rimouski, Québec G5L 3A1, Canada; Canada Research Chair in Evolutionary Demography and Conservation, Département de biologie, Université de Sherbrooke, 2500 boul. de l'Université, Sherbrooke, Québec J1K 2R1, Canada; Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, Centre for Northern Studies and Centre for Forest Research, 300 Allée des Ursulines, Rimouski, Québec G5L 3A1, Canada },
    ART_NUMBER = { e00920 },
    AUTHOR_KEYWORDS = { Apparent competition; Incidental predators; Landscape ecology; Rangifer tarandus caribou; Variance partitioning; Vital rates },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.gecco.2020.e00920 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85078203008&doi=10.1016%2fj.gecco.2020.e00920&partnerID=40&md5=2ac846e01c74e8ade4301a0b3854c334 },
}

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