Large birds travel farther in homogeneous environments
2019
Tucker, Marlee | Alexandrou, Olga | Bierregaard, Richard | Bildstein, Keith | Böhning-Gaese, Katrin | Bracis, Chloe | Brzorad, John | Buechley, Evan | Cabot, David | Calabrese, Justin | Carrapato, Carlos | Chiaradia, André | Davenport, Lisa | Davidson, David | Desholm, Mark | Desorbo, Christopher | Domenech, Robert | Enggist, Peter | Fagan, William | Farwig, Nina | Fiedler, Wolfgang | Fleming, Christen | Franke, Alastair | Fryxell, John | García-Ripollés, Clara | Grémillet, David | Griffin, Larry | Harel, Roi | Kane, Adam | Kays, Roland | Kleyheeg, Erik | Lacy, Anne | Lapoint, Scott | Limiñana, Ruben | López-López, Pascual | Maccarone, Alan | Mellone, Ugo | Mojica, William | Nathan, Ran | Newman, Scott | Noonan, Michael | Oppel, Steffen | Prostor, Mark | Rees, Eileen | Ropert‐coudert, Yan | Rösner, Sascha | Sapir, Nir | Schabo, Dana | Schmidt, Matthias | Schulz, Holger | Shariati, Mitra | Shreading, Adam | Paulo Silva, João | Skov, Henrik | Spiegel, Orr | Takekawa, John | Teitelbaum, Claire | van Toor, Mariëlle | Urios, Vicente | Vidal-Mateo, Javier | Wang, Qiang | Watts, William | Wikelski, Martin | Wolter, Kerri | Žydelis, Ramūnas | Mueller, Thomas | Senckenberg Biodiversity and Climate Research Centre (SBiK-F) ; Goethe-Universität Frankfurt am Main-Senckenberg – Leibniz Institution for Biodiversity and Earth System Research - Senckenberg Gesellschaft für Naturforschung ; Leibniz Association-Leibniz Association | Department of Biological Sciences [Germany] ; Goethe-Universität Frankfurt am Main | Society for the Protection of Prespa | Biology Department [North Carolina] ; University of North Carolina [Charlotte] (UNC) ; University of North Carolina System (UNC)-University of North Carolina System (UNC) | Hawk Mountain Sanctuary [Pennsylvania] | Reese Institute for Conservation of Natural Resources [North Carolina ; Lenoir‐Rhyne University | HawkWatch International [USA] | Biodiversity and Conservation Ecology Laboratory [USA] ; University of Utah | School of Biological, Earth and Environmental Sciences [Cork] (BEES) ; University College Cork (UCC) | Smithsonian Conservation Biology Institute | Department of Biology [USA] ; University of Maryland [College Park] (UMD) ; University System of Maryland-University System of Maryland | Instituto da Conservação da Natureza e das Florestas [Portugal] | Phillip Island Nature Parks [Australia] | School of Biological Sciences [Australia] ; 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University of Cape Town | Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) ; 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 [Occitanie])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Caerlaverock Wetland Centre [UK] ; Wildfowl & Wetlands Trust [UK] | Movement Ecology Laboratory [ISRAEL] ; The Hebrew University of Jerusalem (HUJ) | School of Biology and Environmental Science and Earth Institute [Ireland] ; University College Dublin [Dublin] (UCD) | North Carolina Museum of Natural Sciences | Department of Forestry and Environmental Resources [Raleigh] (FER) ; 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International audience
Afficher plus [+] Moins [-]anglais. AbstractAimAnimal movement is an important determinant of individual survival, population dynamics and ecosystem structure and function. Nonetheless, it is still unclear how local movements are related to resource availability and the spatial arrangement of resources. Using resident bird species and migratory bird species outside the migratory period, we examined how the distribution of resources affects the movement patterns of both large terrestrial birds (e.g., raptors, bustards and hornbills) and waterbirds (e.g., cranes, storks, ducks, geese and flamingos).LocationGlobal.Time period2003–2015.Major taxa studiedBirds.MethodsWe compiled GPS tracking data for 386 individuals across 36 bird species. We calculated the straight‐line distance between GPS locations of each individual at the 1‐hr and 10‐day time‐scales. For each individual and time‐scale, we calculated the median and 0.95 quantile of displacement. We used linear mixed‐effects models to examine the effect of the spatial arrangement of resources, measured as enhanced vegetation index homogeneity, on avian movements, while accounting for mean resource availability, body mass, diet, flight type, migratory status and taxonomy and spatial autocorrelation.ResultsWe found a significant effect of resource spatial arrangement at the 1‐hr and 10‐day time‐scales. On average, individual movements were seven times longer in environments with homogeneously distributed resources compared with areas of low resource homogeneity. Contrary to previous work, we found no significant effect of resource availability, diet, flight type, migratory status or body mass on the non‐migratory movements of birds.Main conclusionsWe suggest that longer movements in homogeneous environments might reflect the need for different habitat types associated with foraging and reproduction. This highlights the importance of landscape complementarity, where habitat patches within a landscape include a range of different, yet complementary resources. As habitat homogenization increases, it might force birds to travel increasingly longer distances to meet their diverse needs.
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