Temporally increasing spatial synchrony of North American temperature and bird populations

2016 ◽  
Vol 6 (6) ◽  
pp. 614-617 ◽  
Author(s):  
Walter D. Koenig ◽  
Andrew M. Liebhold
Keyword(s):  
North American ◽  
Spatial Synchrony ◽  
Bird Populations

scholarly journals Long-term trends and drought: spatiotemporal variation in juvenile sex ratios of North American ducks

2021 ◽  
Author(s):  
Sage Ellis ◽  
Madeleine Lohman ◽  
James Sedinger ◽  
Perry Williams ◽  
Thomas Riecke
Keyword(s):  
United States ◽  
North American ◽  
Sex Ratios ◽  
Survival Rates ◽  
The United States ◽  
Avian Communities ◽  
Eastern United States ◽  
Bird Populations ◽  
Long Term Trends

Sex ratios affect population dynamics and individual fitness, and changing sex ratios can be indicative of shifts in sex-specific survival at different life stages. While climate- and landscape-change alter sex ratios of wild bird populations, long-term, landscape scale assessments of sex ratios are rare. Further, little work has been done to understand changes in sex ratios in avian communities. In this manuscript, we analyse long-term (1961-2015) data on five species of ducks across five broad climatic regions of the United States to estimate the effects of drought and long-term trends on the proportion of juvenile females captured at banding. As waterfowl have a 1:1 sex ratio at hatch, we interpret changes in sex ratios of captured juveniles as changes in sex-specific survival rates during early life. Seven of twelve species-region pairs exhibited evidence for long-term trends in the proportion of juvenile females at banding. The proportion of juvenile females at banding increased for duck populations in the western United States and typically declined for duck populations in the eastern United States. We only observed evidence for an effect of drought in two of the twelve species-region pairs, where the proportion of females declined during drought. As changes to North American landscapes and climate continue and intensify, we expect continued changes in sex-specific juvenile survival rates. More broadly, we encourage further research examining the mechanisms underlying long-term trends in juvenile sex ratios in avian communities.

scholarly journals The implications of mid‐latitude climate extremes for North American migratory bird populations

Ecosphere ◽  
2016 ◽  
Vol 7 (3) ◽  
Author(s):  
Frank A. La Sorte ◽  
Wesley M. Hochachka ◽  
Andrew Farnsworth ◽  
André A. Dhondt ◽  
Daniel Sheldon
Keyword(s):  
North American ◽  
Climate Extremes ◽  
Migratory Bird ◽  
Bird Populations

Seasonal associations with novel climates for North American migratory bird populations

2018 ◽  
Vol 21 (6) ◽  
pp. 845-856 ◽  
Author(s):  
Frank A. La Sorte ◽  
Daniel Fink ◽  
Alison Johnston
Keyword(s):  
North American ◽  
Migratory Bird ◽  
Bird Populations

West Nile virus emergence and large-scale declines of North American bird populations

Nature ◽  
2007 ◽  
Vol 447 (7145) ◽  
pp. 710-713 ◽  
Author(s):  
Shannon L. LaDeau ◽  
A. Marm Kilpatrick ◽  
Peter P. Marra
Keyword(s):  
West Nile Virus ◽  
North American ◽  
Large Scale ◽  
West Nile ◽  
Bird Populations ◽  
North American Bird ◽  
Virus Emergence

Dynamics of North American breeding bird populations

Nature ◽  
10.1038/30478 ◽  
1998 ◽  
Vol 393 (6682) ◽  
pp. 257-260 ◽  
Author(s):  
Timothy H. Keitt ◽  
H. Eugene Stanley
Keyword(s):  
North American ◽  
Breeding Bird ◽  
Bird Populations

scholarly journals Within-population spatial synchrony in mast seeding of North American oaks

Oikos ◽  
2004 ◽  
Vol 104 (1) ◽  
pp. 156-164 ◽  
Author(s):  
Andrew Liebhold ◽  
Victoria Sork ◽  
Mikko Peltonen ◽  
Walter Koenig ◽  
Ottar N. Bjørnstad ◽  
...  
Keyword(s):  
North American ◽  
Mast Seeding ◽  
Spatial Synchrony
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