Survival of Afro-Palaearctic passerine migrants in western Europe and the impacts of seasonal weather variables
Survival of Afro-Palaearctic passerine migrants in western Europe and the impacts of seasonal weather variables
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DOI：
10.1111/ibi.12366
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发表时间：
2016-07-01
期刊：
影响因子：
2.1
通讯作者：
Baillie, Stephen R.
中科院分区：
文献类型：
--
作者：
Johnston, Alison;Robinson, Robert A.;Baillie, Stephen R.
迁徙鸣禽在西欧的人口显示物种和地区之间的人口趋势有相当大的差异。这些大规模模式的人口和环境原因知之甚少。使用不断努力的雾网研究的数据，我们调查了丰富的变化，成年人的生存和季节性天气条件之间的关系35个西欧人口的8种迁徙莺（Sylviidae）。我们使用跨物种和物种内的比较，以评估生存的年度变化是否与通过或冬季的天气条件相关。我们使用CJS标记-再捕获模型估计了瞬时个体比例和再捕获率的变化。物种越冬在潮湿的生物气候区的西非有显着较高的年度生存概率比物种越冬在干旱的生物气候区的非洲（萨赫勒）。萨赫勒地区的降雨量与五个物种中至少一些种群的生存率呈正相关。我们发现，在秋季和春季通过期间，这可能是由于使用大尺度指数的天气指数显着关系少。在我们研究的所有物种中，年度人口变化与成年生存相关，尽管经历广泛衰退的物种表现出最弱的关系。
Populations of migratory songbirds in western Europe show considerable variation in population trends between species and regions. The demographic and environmental causes of these large-scale patterns are poorly understood. Using data from Constant Effort mist-netting studies, we investigated relationships between changes in abundance, adult survival and seasonal weather conditions among 35 western European populations of eight species of migratory warblers (Sylviidae). We used cross-species and within-species comparisons to assess whether annual variation in survival was correlated with weather conditions during passage or winter. We estimated survival using CJS mark-recapture models accounting for variation in the proportion of transient individuals and recapture rates. Species wintering in the humid bioclimatic zone of western Africa had significantly higher annual survival probabilities than species wintering in the arid bioclimatic zone of Africa (the Sahel). Rainfall in the Sahel was positively correlated with survival in at least some populations of five species. We found substantially fewer significant relationships with indices of weather during the autumn and spring passage periods, which may be due to the use of broad-scale indices. Annual population changes were correlated with adult survival in all of our study species, although species undergoing widespread declines showed the weakest relationships.