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Stopover ecology of the least sandpiper (Calidris minutilla) in Iowa: implications for reservoir management
Lake and Reservoir Management ( IF 1.5 ) Pub Date : 2021-05-28 , DOI: 10.1080/10402381.2021.1920071
Rachel A. Vanausdall 1 , Stephen J. Dinsmore 1
Affiliation  

Abstract

Vanausdall RA, Dinsmore SJ. 2021. Stopover ecology of the least sandpiper (Calidris minutilla) in Iowa: implications for reservoir management. Lake Reserv Manage. 37:300–312.

Multipurpose reservoirs can be used to manage habitat for shorebirds during migration, an energetically costly event that may influence demographics and population numbers. This is particularly true for shorebirds that migrate through the interior of the United States, which has lost much of its wetland habitat. Shorebirds use aquatic systems during stopover periods throughout migration to rest and refuel. Understanding the factors that influence the probability of a shorebird remaining at a stopover area can inform decisions regarding reservoir management. We examined the influence of habitat and environmental covariates and body condition on the daily local residency probability of migrant least sandpipers (Calidris minutilla) at Saylorville Lake, a reservoir in central Iowa. We monitored 189 least sandpipers in fall 2016, 2017, 2019, and 2020 using radiotelemetry. Using a nest survival model, our most competitive model included significant negative effects of water level (β = −8.35, 85% CI = −11.18, −5.52) and body condition (β = −4.91, 85% CI = −6.82, −3.01) on residency probability. We calculated a mean daily local residency probability of 0.78 (95% CI 0.56, 1.00) and used this value to calculate a minimum stopover duration of 3.96 d (95% CI = 3.45, 4.46). Our findings indicate that the timing of water level management at Saylorville Lake can impact the residency probability of the least sandpiper. Drawing down water levels just prior to fall migration and maintaining water levels at or below the conservation pool level (254.8 m) can provide habitat for this species and likely other shorebirds.



中文翻译:

爱荷华州最少鹬(Calidris minutilla)的中途停留生态学:对水库管理的影响

摘要

Vanausdall RA,Dinsmore SJ。2021.爱荷华州最少鹬 ( Calidris minutilla ) 的中途停留生态:对水库管理的影响。湖泊保护区管理。37:300–312。

多用途水库可用于在迁徙期间管理滨鸟的栖息地,这是一项可能影响人口统计和人口数量的耗能巨大的活动。对于在美国内陆迁徙的滨鸟来说尤其如此,美国已经失去了大部分湿地栖息地。水鸟在整个迁徙过程中的中途停留期间使用水生系统来休息和加油。了解影响滨鸟停留在中途停留区域概率的因素可以为有关水库管理的决策提供信息。我们研究了栖息地和环境协变量以及身体状况对迁徙最少的鹬(Calidris minutilla)位于爱荷华州中部的一个水库塞勒维尔湖。我们使用无线电遥测技术在 2016 年、2017 年、2019 年和 2020 年秋季监测了 189 只最少的鹬。使用巢生存模型,我们最具竞争力的模型包括水位 (β = -8.35, 85% CI = -11.18, -5.52) 和身体状况 (β = -4.91, 85% CI = -6.82, - 3.01) 关于居住概率。我们计算了 0.78 (95% CI 0.56, 1.00) 的平均每日本地居住概率,并使用该值计算了 3.96 天的最短停留时间 (95% CI = 3.45, 4.46)。我们的研究结果表明,赛勒维尔湖水位管理的时间安排会影响最少鹬的居住概率。在秋季迁移之前降低水位,并将水位保持在或低于保护池水位 (254.

更新日期:2021-05-28
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