ChristophersonTremblayGagneEtAl2019

Référence

Christopherson, V., Tremblay, J.-P., Gagné, P.N., Bérubé, J., St-Laurent, M.-H. (2019) Meeting caribou in the alpine: Do moose compete with caribou for food? Global Ecology and Conservation, 20. (Scopus )

Résumé

The Atlantic-Gaspésie caribou (Rangifer tarandus caribou) is an endangered, isolated population that has been declining for decades in response to intensive logging. Timber harvesting has led to a significant increase in moose (Alces americanus) densities and has triggered numerical and functional predator responses. Moose are now frequently observed at higher altitudes in preferential caribou habitat. Despite extensive range overlap between these two species across Canada, few studies have precisely assessed the potential role of exploitative competition. We assessed the potential overlap between their diets during summer, a key period for energy and nutrient acquisition in cervids. We collected faeces from both species along an altitudinal gradient (200 m–1250 m asl) and used plant chloroplast barcoding sequence trnL to reconstruct diet at the species level. Plant species composition differed between caribou and moose samples, with cervid species explaining 40% of the variation in dissimilarity. We noted slight variations in dissimilarity between species between months and along an altitudinal gradient. Some species that are almost exclusively eaten by moose (speckled alder, wild redcurrant) or by caribou (common juniper, common horsetail) contributed the most to the dissimilarity between diets. The potential for food competition appears relatively low, even at increased moose densities, possibly as a result of past competition. This separation in food niche could also be explained by an imperfect segregation of species since the proportion of time spent in different strata of altitude is unequal. High moose densities thus appear to be more harmful to caribou due to shared predators, but a low level of competition for a few food items could contribute to the decline of this endangered population if some caribou are nutritionally stressed. © 2019 The Authors

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@ARTICLE { ChristophersonTremblayGagneEtAl2019,
    AUTHOR = { Christopherson, V. and Tremblay, J.-P. and Gagné, P.N. and Bérubé, J. and St-Laurent, M.-H. },
    TITLE = { Meeting caribou in the alpine: Do moose compete with caribou for food? },
    JOURNAL = { Global Ecology and Conservation },
    YEAR = { 2019 },
    VOLUME = { 20 },
    NOTE = { cited By 0 },
    ABSTRACT = { The Atlantic-Gaspésie caribou (Rangifer tarandus caribou) is an endangered, isolated population that has been declining for decades in response to intensive logging. Timber harvesting has led to a significant increase in moose (Alces americanus) densities and has triggered numerical and functional predator responses. Moose are now frequently observed at higher altitudes in preferential caribou habitat. Despite extensive range overlap between these two species across Canada, few studies have precisely assessed the potential role of exploitative competition. We assessed the potential overlap between their diets during summer, a key period for energy and nutrient acquisition in cervids. We collected faeces from both species along an altitudinal gradient (200 m–1250 m asl) and used plant chloroplast barcoding sequence trnL to reconstruct diet at the species level. Plant species composition differed between caribou and moose samples, with cervid species explaining 40% of the variation in dissimilarity. We noted slight variations in dissimilarity between species between months and along an altitudinal gradient. Some species that are almost exclusively eaten by moose (speckled alder, wild redcurrant) or by caribou (common juniper, common horsetail) contributed the most to the dissimilarity between diets. The potential for food competition appears relatively low, even at increased moose densities, possibly as a result of past competition. This separation in food niche could also be explained by an imperfect segregation of species since the proportion of time spent in different strata of altitude is unequal. High moose densities thus appear to be more harmful to caribou due to shared predators, but a low level of competition for a few food items could contribute to the decline of this endangered population if some caribou are nutritionally stressed. © 2019 The Authors },
    AFFILIATION = { Département de Biologie, Chimie et Géographie, Centre for Northern Studies, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Québec G5L 3A1, Canada; Département de biologie, Centre for Northern Studies, Centre for Forest Research, Université Laval, 1045 avenue de la Médecine, Québec, Québec G1V 0A6, Canada; Natural Resources Canada, Laurentian Forestry Centre, 1055 du P.E.P.S, P.O. Box 10380, Stn. Sainte-Foy, Quebec City, Quebec G1V 4C7, Canada; Département de Biologie, Centre for Northern Studies, Centre for Forest Research, Université du Québec à Rimouski, Chimie et Géographie, 300 Allée des Ursulines, Rimouski, (Québec) G5L 3A1, Canada },
    ART_NUMBER = { e00733 },
    AUTHOR_KEYWORDS = { Alces americanus; Altitudinal gradient; DNA metabarcoding; Exploitative competition; Rangifer tarandus caribou; Summer forage },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.gecco.2019.e00733 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069971520&doi=10.1016%2fj.gecco.2019.e00733&partnerID=40&md5=8a696af8ed665c7dc38d5ada534e4594 },
}

********************************************************** ***************** Facebook Twitter *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - Mycorhizes_2019 ****************** **********************************************************

********************************************************** ***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

Jérémie Alluard (2016) Les statistiques au moments de la rédaction 

  • Ce document a pour but de guider les étudiants à intégrer de manière appropriée une analyse statistique dans leur rapport de recherche.

Voir les autres...