Apparent survival of tropical birds in a wet, premontane forest in Costa Rica

Apparent survival of tropical birds in a wet, premontane forest in Costa Rica
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哥斯达黎加潮湿的山前森林中热带鸟类的明显生存情况

DOI:
10.1111/jofo.12290
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发表时间:
2019
影响因子:
0.9
通讯作者:
Boyle, W. Alice
Boyle, W. Alice
中科院分区:
生物学4区
文献类型:
--
作者:
Shogren, Elsie H.;Jones, Megan A.;Sandercock, Brett K.;Boyle, W. Alice

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尽管热带鸟类在生命史理论的发展中很重要,但我们缺乏有关大多数物种的人口比率和人口动态驱动因素的信息。我们使用来自哥斯达黎加中海拔异常潮湿的山前森林的 7 年(2007-2013)捕获-标记-再捕获数据集来估计七种热带雀形目动物的表观生存率。对于其中四个物种,我们提供了首次发布的人口统计参数。重新捕获概率范围为 0.21 至 0.53,表观存活率的年度估计范围为 0.23 至 1.00。我们还评估了降雨量的年际变化对人口比率的影响。我们的结果与年际降雨量增加了两个物种的表观存活率的估计值和减少了三个物种的表观生存率的估计值一致。对于我们可以将表观存活率估计值与干旱地区的估计值进行比较的三个物种,我们的估计值并不总是高于或低于之前发布的值。我们记录的物种内部和物种之间人口统计率的时间和空间变异性凸显了在广泛的生物地理梯度上概括生活史特征的困难。最重要的是,这项工作强调了降水在塑造热带鸟类人口数量方面的特定作用,并强调了对热带生命史的环境驱动因素进行机械研究的必要性。
Despite the importance of tropical birds in the development of life history theory, we lack information about demographic rates and drivers of population dynamics for most species. We used a 7‐year (2007–2013) capture‐mark‐recapture dataset from an exceptionally wet premontane forest at mid‐elevation in Costa Rica to estimate apparent survival for seven species of tropical passerines. For four of these species, we provide the first published demographic parameters. Recapture probabilities ranged from 0.21 to 0.53, and annual estimates of apparent survival varied from 0.23 to 1.00. We also assessed the consequences of inter‐annual variation in rainfall on demographic rates. Our results are consistent with inter‐annual rainfall increasing estimates of apparent survival for two species and decreasing estimates for three species. For the three species where we could compare our estimates of apparent survival to estimates from drier regions, our estimates were not consistently higher or lower than those published previously. The temporal and spatial variability in demographic rates we document within and among species highlights the difficulties of generalizing life history characteristics across broad biogeographic gradients. Most importantly, this work emphasizes the context‐specific role of precipitation in shaping tropical avian demographic rates and underscores the need for mechanistic studies of environmental drivers of tropical life histories.
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