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| DOI | 10.1093/ornithapp/duae003 |
| Poor reproductive performance of Least Terns after tropical cyclones in Mississippi, USA suggests delayed nesting seriously reduces colony productivity | |
| 发表日期 | 2024 |
| ISSN | 0010-5422 |
| EISSN | 2732-4621 |
| 英文摘要 | Coastal birds that rely on sandy beaches for breeding are vulnerable to catastrophic flooding events resulting from tropical cyclones. The effects of storm surge on annual productivity depend on the propensity and success of renesting attempts post-storm. From 2017 to 2021, I investigated the effects of storm surge on Least Tern (Sternula antillarum) annual productivity, renesting probability, and nest and chick survival after storms on Mississippi's Gulf of Mexico Coast. Tropical cyclones made landfall during peak breeding period in 3 of these years, resulting in complete overwash of all colonies. Observers monitored daily nest survival, productivity (maximum fledge count per maximum nest count), and frequency of disturbance from avian predators at each colony. Total annual productivity (fledge count per nest count across the study area) summed across colonies ranged from 0.00 to 0.07 in storm years and from 0.29 to 0.66 in non-storm years. Probability of colony re-occupation declined as a function of storm date and increased with pre-storm nest success. Disturbance rate from avian predators did not increase post-storm compared to pre-storm periods. Nest survival increased with colony size and decreased in both late-season (non-storm) and post-storm time periods. Mean probability of chick survival was 0.20 +/- 0.06 (mean +/- SD) for peak nesting period in non-storm years, whereas mean predicted chick survival was 0.003-0.004 in storm years and in renesting periods in all years. Storm surge resulted in nearly complete loss of Least Tern breeding productivity despite renesting attempts and colony re-occupation after storms. I found no evidence that avian predation increased post-storm as a result of habitat changes; rather, similarly low productivity was observed for late-season breeding attempts in non-storm years. Repeated storm surge events could pose a serious threat to the viability of Mississippi's coastal-nesting Least Tern population, and protection of Least Terns during early and peak nesting seasons is critical for ensuring breeding success. center dot The Least Tern is a colonial beach-nesting bird that needs conservation attention throughout its range. This species is on the U. S. Fish and Wildlife Service Birds of Conservation Concern List, and is listed as a species of High Conservation Need in the Mississippi State Wildlife Action Plan.center dot Storm surge during the breeding season can destroy large numbers of Least Tern eggs and chicks, and factors such as storm timing, habitat changes, and dispersal distances might affect whether birds can make a successful post-storm breeding attempt.center dot Least Tern breeding productivity (fledglings produced per nest) in coastal Mississippi was negligible in 3 storm years despite up to 24% of birds attempting to breed post-storm.center dot Egg and chick survival rates and predator disturbance rates post-storm were similar to rates observed in late season in non-storm years.center dot The post-storm breeding failure is likely due to more general poor performance of late breeders that cannot be addressed through habitat management.center dot Increased storm frequency and intensity could pose a serious threat to the viability of Mississippi's coastal Least Tern population.center dot Protection of Least Terns during early and peak nesting seasons is critical for ensuring breeding success. Las aves costeras que dependen de playas arenosas para la reproduccion son vulnerables a eventos catastroficos de inundacion causados por los ciclones tropicales. Los efectos que la marea de tormenta tiene en la productividad anual dependen de la propension y el exito de los intentos de renidificacion despues de la tormenta. De 2017 a 2021, investigue los efectos de la marea de tormenta en la productividad anual de Sternula antillarum, en la probabilidad de renidificacion y en la supervivencia de nidos y polluelos despues de tormentas en la costa del Golfo de Mexico en Mississippi. Los ciclones tropicales tocaron tierra durante el periodo de reproduccion maxima en tres de estos anos, lo que produjo la inundacion completa de todas las colonias. Los observadores monitorearon la supervivencia diaria de los nidos, la productividad (conteo maximo de volantones por conteo maximo de nidos) y la frecuencia de disturbios por parte de depredadores aviares en cada colonia. La productividad anual total (conteo de volantones por conteo de nidos en toda el area de estudio) sumada a traves de las colonias vario de 0.00 a 0.07 en anos de tormentas y de 0.29 a 0.66 en anos sin tormentas. La probabilidad de reocupacion de la colonia disminuyo en funcion de la fecha de la tormenta y aumento con el exito del nido previo a la tormenta. La tasa de disturbios causada por los depredadores aviares no aumento despues de la tormenta en comparacion con los periodos previos a la tormenta. La supervivencia del nido aumento con el tamano de la colonia y disminuyo tanto en la temporada tardia (sin tormenta) como en el periodo posterior a la tormenta. La probabilidad media de supervivencia de los polluelos fue de 0.20 +/- 0.06 (media +/- DE) para el pico del periodo de nidificacion en anos sin tormentas, mientras que la probabilidad media predicha de supervivencia de los polluelos fue de 0.003-0.004 en anos de tormenta y en periodos de renidificacion para todos los anos. La marea de tormenta resulto en una perdida casi completa de la productividad reproductiva de S. antillarum a pesar de los intentos de renidificacion y de reocupacion de la colonia despues de las tormentas. No encontre evidencia de que la depredacion aviar aumentara despues de la tormenta como resultado de cambios en el habitat; mas bien, se observo una productividad igualmente baja para los intentos de reproduccion en la temporada tardia en anos sin tormentas. Los eventos repetidos de marea de tormenta podrian representar una amenaza seria para la viabilidad de la poblacion de S. antillarum que anida en la costa de Mississippi, y su proteccion durante las temporadas tempranas y de pico de nidificacion es fundamental para garantizar el exito reproductivo. |
| 英文关键词 | breeding; climate change; cyclone; dispersal; nest survival; renesting; cambio climatico; ciclon; dispersion; renidificacion; reproduccion; supervivencia de nidos |
| 语种 | 英语 |
| WOS研究方向 | Zoology |
| WOS类目 | Ornithology |
| WOS记录号 | WOS:001179453700001 |
| 来源期刊 | ORNITHOLOGICAL APPLICATIONS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/306903 |
| 推荐引用方式 GB/T 7714 | . Poor reproductive performance of Least Terns after tropical cyclones in Mississippi, USA suggests delayed nesting seriously reduces colony productivity[J],2024. |
| APA | (2024).Poor reproductive performance of Least Terns after tropical cyclones in Mississippi, USA suggests delayed nesting seriously reduces colony productivity.ORNITHOLOGICAL APPLICATIONS. |
| MLA | "Poor reproductive performance of Least Terns after tropical cyclones in Mississippi, USA suggests delayed nesting seriously reduces colony productivity".ORNITHOLOGICAL APPLICATIONS (2024). |
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