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首页> 外文期刊>Slovak Raptor Journal >Riding the storm out: select demographics of a breeding population of Coopera??s hawks (Accipiter cooperii) following a severe spring snowstorm
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Riding the storm out: select demographics of a breeding population of Coopera??s hawks (Accipiter cooperii) following a severe spring snowstorm

机译：在严重的春天暴风雪之后，选择繁殖人口的人群的合作队员的人口统计学（Accipiter Cooperii）的人口统计学

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摘要

The demographic responses to severe weather by top-level predators, including birds of prey, are underreported and/or unknown. Severe storms are predicted by climate change models to increase globally and in frequency into the 22nd century. In April 2018, a population of breeding Coopera??s hawks (Accipiter cooperii) in central Wisconsin, USA, experienced three days of heavy snowfall in the most severe storm, in pre-incubation-stage, for 39 years (1980a??2018). Here I report select demographic outcomes of this nesting population following this intense weather. The median hatching date of 10 June in 2018 was the sixth latest such metric in those 39 years (and the latest in 22 years since 1996) for this population, which has advanced its breeding schedule about 1.3 days/decade due to climate change or warming. Survival of a total of 16 color-marked breeding adults, 15 males and 1 female, observed pre-storm in the nesting areas, was 100% up through the late nestling stage in the same nesting areas where these birds were initially detected in 2018. Average clutch size (4.4 eggs/nest) and average brood size (4.0 young/nest) were similar to the overall average annual metrics of these demographics for this population in the earlier 38 study years. Nest success, whereby 95% of 21 nests with eggs produced advanced-aged young, was higher in 2018 than the overall average of 77% nest success rate during the earlier years. The later timing of hatching in 2018, likely due to the severe spring snowstorm, appeared to have no deleterious effects either on survival of the breeding adults or on the reproductive output of this healthy study population. Tree-canopy prey may have served as important alternative food for this typically ground-foraging raptor in 2018.
机译：以顶级捕食者（包括猎物）的顶级捕食者严重天气的人口响应是低估的和/或未知的。气候变化模型预测严重风暴，以全球和频率进入22世纪。 2018年4月，美国威斯康星州威斯康星州的繁殖馆（Accipiter Cooperii）的繁殖队（Accipiter Cooperii）在最严重的风暴中经历了三天的大雪，在预孵育阶段，39年（1980A ?? 2018年）。在这里，我在此激烈的天气之后向选择这种筑巢人口的人口结果。 2018年6月10日的中位数孵化日期是这一人口的39年（自1996年以来的22年以来）的第六个最新的公制，这是由于气候变化或变暖所需的繁殖时间表约为1.3天/十年。共存16种颜色标记的繁殖成人，15名男性和1名女性观察到嵌套地区的暴风雨，通过在2018年最初检测到这些鸟类的同一嵌套区域的雏鸟阶段晚期100％。平均离合器尺寸（4.4鸡蛋/巢）和平均育雏尺寸（4.0年轻/巢）与本人在早期的38年学习年份的这些人口统计学的整体年平均年平均度量相似。巢成功，其中95％的鸡蛋中的鸡蛋中的21个巢，2018年较高，比较早年的巢成功率的总体平均水平为77％。 2018年孵化的后来时间，可能是由于春天暴风雪严重，似乎对育种成人的生存或对这种健康研究人口的生殖产出无有害影响。 Tree-Canopy Preaty 2018年可能曾担任这款典型地锻造猛禽的重要替代食品。

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