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Migratory Connectivity of Sora, Virginia and Yellow Rails

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Presentation on theme: "Migratory Connectivity of Sora, Virginia and Yellow Rails"— Presentation transcript:

1 Migratory Connectivity of Sora, Virginia and Yellow Rails
Auriel M.V. Fournier – Arkansas Cooperative Fish and Wildlife Research Unit – University of Arkansas Kiel Drake, Doug Tozer – Bird Studies Canada David G. Krementz – USGS Arkansas Cooperative Fish and Wildlife Research Unit – University of Arkansas @RallidaeRule

2 Stopover, Migration, Wetlands
Stopover habitat for wetland species has been greatly reduced in the U.S (>60%) Waterfowl connectivity has been studied Other wetland species are unknown Especially hard for small species with no site fidelity

3 Why Rails? Why Stable Isotopes?
Important connection between wetland systems Sora and Virginia Rail are game species Elusive, poorly studied, wetland obligate No known site fidelity Isotopes – Single capture needed Butler et al – Yellow Rails in inland Canada

4 Sample Collection Yellow Rail Breeding Grounds Foam Lake, Saskatchewan
All Species Migration Sora Virginia Rail Yellow Rail

5 Stable Hydrogen Isotopes
Image:

6 Fournier & Sullivan et al 2016
Journal of Applied Ecology DOI / Stable Hydrogen Stables Isotopes with Species Distribution Model Prior Species Distribution Model

7 Species Distribution Models
Regional, State and Provincial Marshbird Monitoring Programs Logistic Regression Used 21 environmental covariates related to Temperature Wetland cover Rainfall Bayesian prior Van Wilgenburg, S.L., and K.A. Hobson Combining stable-isotope and band recovery data to improve probabilistic assignment of migratory birds to origin. Ecological Applications 21:

8 Model Results Virginia Rail Standard Deviation of Temperature
Modeling continues to be challenging Sora and Yellow Rail Mean Temp Driest Quarter Mean Temp Warmest Quarter Mean of monthly temperature range Non-forested Wetland presence

9 Yellow Rail

10 Virginia Rail

11 Sora

12 Next Steps Better east coast data for SDM
Better environmental/habitat data to feed into SDM Bring in additional isotopes Butler et al 2016 found Sulphur to be helpful Use other forms of tracking connectivity

13 Acknowledgements Wonderful Technicians! Funding From
Garden Club of America Frances M. Peacock Scholarship, Arkansas Cooperative Fish and Wildlife Research Unit

14 Questions? Presentation Available - tinyurl.com/rail-naoc16
DOI: /m9.figshare @RallidaeRule aurielfournier.github.io Butler, C.J. Wilson J.K. Frazee S.R. Kelly J.F A Comparison of the origins of Yellow Rails wintering in Oklahoma and Texas, USA Waterbirds Fournier, A.M.V. Sullivan A.R. Bump J.K. Perkins M. Shieldcastle M.C. King S.L Combining citizen science species distribution models and stable isotopes reveals migratory connectivity in the secretive Virginia Rail. Journal of Applied Ecology Van Wilgenburg, S.L., and K.A. Hobson Combining stable-isotope and band recovery data to improve probabilistic assignment of migratory birds to origin. Ecological Applications 21: Questions?

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