Variation in climate warming along the migration route uncouples arrival and breeding dates
Variation in climate warming along the migration route uncouples arrival and breeding dates
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DOI：
10.1111/j.1365-2486.2004.00823.x
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发表时间：
2004-09-01
影响因子：
11.6
通讯作者：
Lehikoinen, E
中科院分区：
文献类型：
--
作者：
Ahola, M;Laaksonen, T;Lehikoinen, E
面对全球气候变化，移栖物种特别令人关切，因为它们可能受到越冬地区、沿着和繁殖地变化的影响。在这里，我们表明，迁移和繁殖时间的一个跨撒哈拉的移民，捕蝇Ficedula hypoleuca，密切关注当地温度沿着迁移路线和繁殖地。由于短期内春季的长期温度趋势的差异，迁移期和迁移和繁殖日期之间的时间间隔，这个物种在芬兰西南部的延长。中欧北方部分地区的气温在第一批移民抵达时上升，为他们向北迁移提供了便利。春季晚些时候的气温没有变化，最后一批个体与以前一样同时到达。繁殖的时间没有提前，因为到达繁殖地点后的温度没有变化。这些结果表明，姬小蜂可以加快它们的迁移速度，以响应沿着迁移路线的温度上升。我们的研究结果强烈表明，气候变化的影响，必须在适当的时间和地理尺度为每个物种和人口有关的研究。
Migratory species are of special concern in the face of global climate change, since they may be affected by changes in the wintering area, along the migration route and at the breeding grounds. Here we show that migration and breeding times of a trans-Saharan migrant, the pied flycatcher Ficedula hypoleuca, closely follow local temperatures along the migration route and at the breeding grounds. Because of differences in long-term temperature trends of short within-spring periods, the migration period and the time interval between migration and breeding dates of this species have extended in SW Finland. Temperatures in northern parts of Central Europe have risen at the time when the first migrants arrive there, facilitating their migration northward. Temperatures later in the spring have not changed, and the last individuals arrive at the same time as before. The timing of breeding has not advanced because temperatures at the breeding site after arrival have not changed. These results show that the pied flycatchers can speed up their migration in response to rising temperatures along the migration route. Our results strongly indicate that the effects of climate change have to be studied at the appropriate time and geographical scales for each species and population concerned.