BohrerBrandesMandelEtAl2012

Référence

Bohrer, G., Brandes, D., Mandel, J.T., Bildstein, K.L., Miller, T.A., Lanzone, M., Katzner, T., Maisonneuve, C., Tremblay, J.A. (2012) Estimating updraft velocity components over large spatial scales: Contrasting migration strategies of golden eagles and turkey vultures. Ecology Letters, 15(2):96-103. (Scopus )

Résumé

Soaring birds migrate in massive numbers worldwide. These migrations are complex and dynamic phenomena, strongly influenced by meteorological conditions that produce thermal and orographic uplift as the birds traverse the landscape. Herein we report on how methods were developed to estimate the strength of thermal and orographic uplift using publicly available digital weather and topography datasets at continental scale. We apply these methods to contrast flight strategies of two morphologically similar but behaviourally different species: golden eagle, Aquila chrysaetos, and turkey vulture, Cathartes aura, during autumn migration across eastern North America tracked using GPS tags. We show that turkey vultures nearly exclusively used thermal lift, whereas golden eagles primarily use orographic lift during migration. It has not been shown previously that migration tracks are affected by species-specific specialisation to a particular uplift mode. The methods introduced herein to estimate uplift components and test for differences in weather use can be applied to study movement of any soaring species. © 2011 Blackwell Publishing Ltd/CNRS.

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@ARTICLE { BohrerBrandesMandelEtAl2012,
    AUTHOR = { Bohrer, G. and Brandes, D. and Mandel, J.T. and Bildstein, K.L. and Miller, T.A. and Lanzone, M. and Katzner, T. and Maisonneuve, C. and Tremblay, J.A. },
    JOURNAL = { Ecology Letters },
    TITLE = { Estimating updraft velocity components over large spatial scales: Contrasting migration strategies of golden eagles and turkey vultures },
    YEAR = { 2012 },
    NOTE = { cited By 120 },
    NUMBER = { 2 },
    PAGES = { 96-103 },
    VOLUME = { 15 },
    ABSTRACT = { Soaring birds migrate in massive numbers worldwide. These migrations are complex and dynamic phenomena, strongly influenced by meteorological conditions that produce thermal and orographic uplift as the birds traverse the landscape. Herein we report on how methods were developed to estimate the strength of thermal and orographic uplift using publicly available digital weather and topography datasets at continental scale. We apply these methods to contrast flight strategies of two morphologically similar but behaviourally different species: golden eagle, Aquila chrysaetos, and turkey vulture, Cathartes aura, during autumn migration across eastern North America tracked using GPS tags. We show that turkey vultures nearly exclusively used thermal lift, whereas golden eagles primarily use orographic lift during migration. It has not been shown previously that migration tracks are affected by species-specific specialisation to a particular uplift mode. The methods introduced herein to estimate uplift components and test for differences in weather use can be applied to study movement of any soaring species. © 2011 Blackwell Publishing Ltd/CNRS. },
    AFFILIATION = { Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, OH, United States; Department of Civil and Environmental Engineering, Acopian Engineering Center, Lafayette College, Easton, PA, United States; Advanced Conservation Strategies, Philadelphia, PA, United States; Acopian Center for Conservation Learning, Hawk Mountain Sanctuary, Orwigsburg, PA, United States; Riparia, The Pennsylvania State University, University Park, PA, United States; Cellular Tracking Technologies, Somerset, PA, United States; Division of Forestry and Natural Resources, West Virginia University, Morgantown, WV, United States; Ministère des Ressources naturelles et de la Faune, Rimouski, QC, Canada; Ministère des Ressources naturelles et de la Faune, Quebec City, QC, Canada },
    AUTHOR_KEYWORDS = { Behavioural ecology; Flight; Movement ecology; Terrain; Uplift; Weather },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/j.1461-0248.2011.01713.x },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-84855468041&doi=10.1111%2fj.1461-0248.2011.01713.x&partnerID=40&md5=f2fadfb1ea8ed1b64cd2a91ce8b5f50c },
}

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