A range-wide domino effect and resetting of the annual cycle in a migratory songbird

Locations of 12 tree swallow (Tachycineta bicolor) breeding sites where geolocators were deployed and recovered (circles; n = 133 individuals), and non-breeding locations (triangles) are superimposed over the breeding (yellow) and non-breeding (pink) range (BirdLife International and NatureServe 2015). The breeding site coordinates and samples sizes within each latitude category (gradients of blue) are in the electronic supplementary material.

Authors: Elizabeth A. Gow 1, Lauren Burke 2, David W. Winkler 3, Samantha M. Knight 1, David W. Bradley 4, Robert G. Clark 5, Marc Be´lisle 6, Lisha L. Berzins 7, Tricia Blake 8, Eli S. Bridge 9, Russell D. Dawson 7, Peter O. Dunn 10, Dany Garant 6, Geoff Holroyd 11, Andrew G. Horn 2, David J. T. Hussell 12,†, Olga Lansdorp 13, Andrew J. Laughlin 14, Marty L. Leonard 2, Fanie Pelletier 6, Dave Shutler 15, Lynn Siefferman 16, Caz M. Taylor 17, Helen Trefry 11, Carol M. Vleck 18, David Vleck 18, Linda A. Whittingham 10 and D. Ryan Norris 1

Year: 2019

Publication: Proceedings of the Royal Society B

Publication Link: http://dx.doi.org/10.1098/rspb.2018.1916

Access: Open

Affliations: 1Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
2Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4R2
3Department of Ecology and Evolutionary Biology, Museum of Vertebrates, Laboratory of Ornithology,
Cornell University, Ithaca, NY 14853, USA
4Bird Studies Canada, Delta, British Columbia, Canada V4K 3N2
5Environment and Climate Change Canada, Saskatoon, Saskatchewan, Canada S7N 0X4
6Département de Biologie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1
7Ecosystem Science and Management Program, University of Northern British Columbia, Prince George,
British Columbia, Canada V2N 4Z9
8Alaska Songbird Institute, Fairbanks, AK 99708, USA
9Oklahoma Biological Survey, University of Oklahoma, Norman, OK 73019, USA
10Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-
Milwaukee, Milwaukee, WI 53201, USA
11Beaverhill Bird Observatory, Box 1418, Edmonton, Alberta, Canada T5J 2N5
12Ontario Ministry of Natural Resources, Peterborough, Ontario, Canada K9J 7BS
13Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
14Department of Environmental Studies, UNC Asheville, Asheville, NC 28804, USA
15Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada B4P 2R6
16Department of Biology, Appalachian State University, Boone, NC 28608, USA
17Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA 70118, USA
18Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, IA 50011-1020, USA

†Deceased 10 April 2015

Corresponding Author: Elizabeth A. Gow, e-mail: egow@uoguelph.ca

Funding: Funding for the study was provided by Leaders Opportunity Fund Grants from the Canadian Foundation for Innovation (D.R.N., R.D.D.), Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grants (D.R.N., R.G.C., R.D.D., M.B., D.G., F.P., M.L.L.), an NSERC Research Tools and Instruments Grant (D.R.N., M.B., R.D.D., D.G., M.L.L., F.P., D.S.), an NSERC Postdoctoral Research Fellowship (E.A.G.), an NSERC Industrial Research and Development Fellowship (D.W.B.), an NSERC Alexander Graham Bell Canada Graduate Scholarship (L.L.B.), the NSERC Canada Research Chairs Program (M.B., F.P.), the University of Guelph (D.R.N.), Environment and Climate Change Canada (R.G.C., O.L.), Bird Studies Canada (D.W.B., D.J.T.H.), the University of Northern British Columbia (R.D.D.), the British Columbia Knowledge Development Fund (R.D.D.), the Skaggs Foundation (T.B.), a National Science Foundation Grant DEB-0933602 (C.M.T.), a National Science Foundation Grant IOS-0745156 (C.M.V., D.V.), Fonds de Recherche du Que´bec—Nature et Technologies (M.B., D.G., F.P.), the James S. McDonnell Foundation (C.M.T.), the Alberta Conservation Association (G.L.H, H.E.T.), TD Friends of the Environment (G.L.H., H.E.T.), the Shell Environmental Fund (G.L.H., H.E.T.) and Nature Canada’s Charles Labatiuk Nature Endowment Fund (G.L.H., H.E.T.). The development and analysis of some of the geolocators were supported by the National Science Foundation grant nos. IDBR 1152356 and DEB 0946685 (E.S.B.), and IDBR 1152131 (D.W.W.).

Keywords: carry-over effects, life history, migration, Tachycineta bicolor, timing of breeding, tree swallow

Abstract: Latitudinal differences in timing of breeding are well documented but how such differences carry over to influence timing of events in the annual cycle of migratory birds is not well understood.We examined geographical variation in timing of events throughout the year using light-level geolocator tracking data from 133 migratory tree swallows (Tachycineta bicolor) originating from 12 North American breeding populations. A swallow’s breeding latitude influenced timing of breeding, which then carried over to affect breeding ground departure. This resulted in subsequent effects on the arrival and departure schedules at autumn stopover locations and timing of arrival at non-breeding locations. This ‘domino effect’ between timing events was no longer apparent by the time individuals departed for spring migration. Our range-wide analysis demonstrates the lasting impact breeding latitude can have on migration schedules but also highlights how such timing relationships can reset when individuals reside at non-breeding sites for extended periods of time.

Supplementary Material: https://dx.doi.org/10.6084/m9.figshare.c.4335911

Intrusive Methodologies: Equipped 561 Tree Swallows with geolocators

Citizen Science: None

Conservation: No discussion




Leave a Reply

Your email address will not be published. Required fields are marked *