Associations of extreme weather, El Niño events, and streamflow with the annual apparent survival of a migratory riparian bird in the western United States DOI Creative Commons

Liz Allocca,

Kyle D. Kittelberger, Çağan H. Şekercioğlu

et al.

Ibis, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Neotropical avian migrants are affected by environmental change throughout their full annual cycles. In the southwestern United States, these species rely on riparian corridors for food and water, migration stopover sites, as breeding grounds. Climate imperils essential ecosystems, with southwest predicted to become hotter more arid, thus resulting in frequent extreme heat drought. The tropical forests of Latin America, where many overwinter, face similar threats. impacts changes demography migratory remains poorly understood. We analysed 13 years capture–mark–recapture bird banding data (2011–2023) from southern Utah examine effects age‐class a range variables survival common bird, Western Yellow‐breasted Chat Icteria virens auricollis . found that adult chats had significantly greater probability than first‐year birds (mean adults: 0.53 ± 0.11; juveniles: 0.12 0.07). While rates differed two age‐classes, variability was closely matched across years, indicating both adults juveniles impacted similarly ecological factors. also were particularly sensitive El Niño‐Southern Oscillation (ENSO) cycle, Niño events being associated reduced chat survival. This suggests key negative impact drier, conditions during wintering grounds Central America—conditions may increasingly future climate change. near‐significant season (% days maximum temperature exceeding 90th percentile 30‐year baseline) spring precipitation, well potential positive association between streamflow. Our results not only demonstrate importance variation cycle driving survival, but highlight how species.

Language: Английский

Associations of extreme weather, El Niño events, and streamflow with the annual apparent survival of a migratory riparian bird in the western United States DOI Creative Commons

Liz Allocca,

Kyle D. Kittelberger, Çağan H. Şekercioğlu

et al.

Ibis, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Neotropical avian migrants are affected by environmental change throughout their full annual cycles. In the southwestern United States, these species rely on riparian corridors for food and water, migration stopover sites, as breeding grounds. Climate imperils essential ecosystems, with southwest predicted to become hotter more arid, thus resulting in frequent extreme heat drought. The tropical forests of Latin America, where many overwinter, face similar threats. impacts changes demography migratory remains poorly understood. We analysed 13 years capture–mark–recapture bird banding data (2011–2023) from southern Utah examine effects age‐class a range variables survival common bird, Western Yellow‐breasted Chat Icteria virens auricollis . found that adult chats had significantly greater probability than first‐year birds (mean adults: 0.53 ± 0.11; juveniles: 0.12 0.07). While rates differed two age‐classes, variability was closely matched across years, indicating both adults juveniles impacted similarly ecological factors. also were particularly sensitive El Niño‐Southern Oscillation (ENSO) cycle, Niño events being associated reduced chat survival. This suggests key negative impact drier, conditions during wintering grounds Central America—conditions may increasingly future climate change. near‐significant season (% days maximum temperature exceeding 90th percentile 30‐year baseline) spring precipitation, well potential positive association between streamflow. Our results not only demonstrate importance variation cycle driving survival, but highlight how species.

Language: Английский

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