Appendix 6 – Population Trend 1 Appendix 6. Population trend
Spatio-temporal population change of arctic-breeding waterbirds
We mapped population change from 1992 to 2016 (%) within approximately 36 km2 (6 km by 6 km) cells for 20 waterbird species observed during the Arctic Coastal Plain Breeding Waterfowl Survey, Alaska. We estimated population trends using hierarchical generalized linear mixed models (see main text, Methods). We present maps in taxonomic order (Chesser et al. 2018) for Lesser Snow Goose, Greater White-fronted Goose, Black Brant, Cackling Goose, Tundra Swan, Northern Pintail, Scaup (Lesser and Greater combined), Steller’s Eider, Spectacled Eider, King Eider, White-winged Scoter, Long-tailed Duck, Red-breasted Merganser, Jaeger (Pomarine, Parasitic, and Long-tailed combined), Sabine’s Gull, Glaucous Gull, Arctic Tern, Red-throated Loon, Pacific Loon, and Yellow-billed Loon. Color shades represent approximately 1 SD change in trend.
Chesser, R. T., K. J. Burns, C. Cicero, J. L. Dunn, A. W. Kratter, I. J. Lovette, P. C. Rasmussen, J. V. Remsen, Jr., J. D. Rising, D. F. Stotz, and K. Winker. 2018. Fifty-ninth supplement to the American Ornithological Society’s check-list of North American birds. The Auk:
Ornithological Advances 135:798–813.
Appendix 6 – Population Trend 2 Figure A6.1. Lesser Snow Goose population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 3 Figure A6.2. Greater White-fronted Goose population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 4 Figure A6.3. Black Brant population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 5 Figure A6.4. Cackling Goose population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 6 Figure A6.5. Tundra Swan population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with
≥ 3 nonzero counts.
Appendix 6 – Population Trend 7 Figure A6.6. Northern Pintail population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 8 Figure A6.7. Scaup (Lesser and Greater combined) population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 9 Figure A6.8. Steller’s Eider population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with
≥ 3 nonzero counts.
Appendix 6 – Population Trend 10 Figure A6.9. Spectacled Edier population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 11 Figure A6.10. King Eider population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 12 Figure A6.11. White-winged Scoter population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 13 Figure A6.12. Long-tailed Duck population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 14 Figure A6.13. Red-breasted Merganser population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 15 Figure A6.14. Jaeger (Pomarine, Parasitic and Long-tailed combined) population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 16 Figure A6.15. Sabine’s Gull population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with
≥ 3 nonzero counts.
Appendix 6 – Population Trend 17 Figure A6.16. Glaucous Gull population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 18 Figure A6.17. Arctic Tern population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 19 Figure A6.18. Red-throated Loon population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
Appendix 6 – Population Trend 20 Figure A6.19. Pacific Loon population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with
≥ 3 nonzero counts.
Appendix 6 – Population Trend 21 Figure A6.20. Yellow-billed Loon population trend (%) across the Arctic Coastal Plain, Alaska 1992–2016. We present trends for cells with ≥ 3 nonzero counts.
