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Hotspots of, and Decadal Changes in, Seabird Abundance in the Northwest Atlantic

Hotspots of, and Decadal Changes in, Seabird Abundance in the Northwest Atlantic. Richard R. Veit 1 , Jarrod A. Santora 2 , Timothy P. White 1 , Marie Martin 1 , Andrew Gilbert 3 and Melanie J. Steinkamp 4 1 CSI/CUNY Graduate Center 2 NOAA SW Fisheries Science Center 3 USGS Patuxent MD

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Hotspots of, and Decadal Changes in, Seabird Abundance in the Northwest Atlantic

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  1. Hotspots of, and Decadal Changes in, Seabird Abundance in the Northwest Atlantic Richard R. Veit1, Jarrod A. Santora2, Timothy P. White1, Marie Martin1, Andrew Gilbert3 and Melanie J. Steinkamp4 1 CSI/CUNY Graduate Center 2 NOAA SW Fisheries Science Center 3 USGS Patuxent MD 4 ACJV/USFWS Patuxent MD

  2. Funded by BOEM(RE), USFWS/ACJV,NSF Polar Programs,NOAA AMLR

  3. 1.) seabirds are aggregated2.) densities range from 0.01 to 10003.) many zeroesNevertheless4.) There is predictability

  4. 1.) HOTSPOTS

  5. Effort

  6. Abundance (left), Diversity (right) Only CELLS that were sampled in BOTH time periods. 1991-2011 1991-2011 1970-1990 1970-1990

  7. 2.) CHANGES IN ABUNDANCE

  8. Northern Fulmar P=10-16

  9. Northern Fulmar 1970-1990 1990-2010

  10. Great Shearwater P= 10-16

  11. Great Shearwater 1970-1990 1990-2010

  12. Northern Gannet P=10-16

  13. Northern Gannet 1970-1990 1990-2010

  14. Dovekie P=0.001

  15. Dovekie 1970-1990 1990-2010

  16. Razorbill P=0.5

  17. Razorbill 1970-1990 1990-2010

  18. Conclusions 1.) Persistence is evident is sebird distributions 2.) Large scale changes can be detected with broadscale surveys

  19. Anomaly of Species Richness: (left) 1970-1990 and (right) 1990-2011.

  20. Spatial difference in effort between 1970-1990 (+) and 1991-2011 (-) 1991-2011 1970-1990

  21. Anomaly of Abundance: (left) 1970-1990 and (right) 1990-2011.

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