1. 1. 2. 2. 3. 4. 4. 3. Individual variation in D within a breeding population of American redstarts. Kathryn M. Langin 1 *, Matthew W. Reudink 1 *, T. Kurt Kyser 2 , D. Ryan Norris 3 , Peter P. Marra 4 , and Laurene M. Ratcliffe 1.
Individual variation in D within a breeding population of American redstarts
Kathryn M. Langin1*, Matthew W. Reudink1*, T. Kurt Kyser2, D. Ryan Norris3, Peter P. Marra4, and Laurene M. Ratcliffe1
1Dept. Biology and 2Dept. Geological Sciences and Geological Engineering, Queen’s University, Kingston ON
3Dept. Forest Sciences, University of British Columbia, Vancouver BC; 4Smithsonian Migratory Bird Center, Washington DC
*First two authors contributed equally
Results and Discussion
Figure 2. Variation in D among age groups and feather types.
To examine variation in D signatures within American redstart population breeding in southeastern Ontario.
Figure 1. American redstart (Setophaga ruticilla) breeding (red; darker=higher density) and wintering (blue) ranges. Contour lines are based on D (‰) values of growing-season precipitation, corrected for water-feather fractionation5.
Figure 3. Inter-annual variation in D for adult and nestling feathers.
1K.A. Hobson, L.I. Wassenaar, Oecologia 109, 142 (1997).
2D.R. Rubenstein et al., Science 295, 1062 (2002).
3J.F. Kelly et al., Oecologia 130, 216 (2002).
4D.R. Norris et al., Science 306, 2249 (2004).
5D.R. Norris et al., Auk In review.
6T.W. Sherry, R.T. Holmes, in The Birds of North America, No. 277, A. Poole, F. Gill, Eds. (Academy of Natural Sciences, Philadelphia PA, 1997).
Funding was provided by the Natural Sciences and Engineering Research Council of Canada (LMR, TKK, KML, DRN), the National Science Foundation (PPM), the Canadian Foundation for Innovation (TKK), Wilson Ornithological Society (DRN), Sigma Xi (MWR), American Ornithologists’ Union (MWR), Society of Canadian Ornithologists (MWR), Queen’s University, and the Smithsonian Institution. Thanks to Kerry Klassen and April Vuletich for help with isotope analysis, to Caleb Hasler for GIS mapping, and to our many excellent field crews.
nestling contour feathers (day 5-6; n=27)
fledgling contour feathers (day 9-10; n=9)
Figure 4. Within-individual variation in D in 2004.