Migratory diversity predicts population declines in birds
Migratory diversity predicts population declines in birds
复制标题
DOI：
10.1111/ele.12569
复制
发表时间：
2016-03-01
期刊：
影响因子：
8.8
通讯作者：
Franco, Aldina M. A.
中科院分区：
文献类型：
--
作者：
Gilroy, James J.;Gill, Jennifer A.;Franco, Aldina M. A.
迁徙物种的减少是全世界的一个紧迫问题，但造成这种减少的机制尚未完全了解。我们假设，在迁徙运动和目的地中具有更大种群内变异性的物种，这里称为迁徙多样性，可能对环境变化更具弹性。为了验证这一点，我们将迁徙多样性的地图指标与340只欧洲种鸟的近期种群趋势相关联。相对于繁殖，占据较大非繁殖范围的物种，我们称之为“迁徙分散”的特征，不太可能比那些非繁殖范围更受限制的物种下降。部分迁移策略（即重叠的繁殖和非繁殖范围）的物种也不太可能比完全移民或完全居民下降，这种影响是独立的迁移距离。最近的进展率在欧洲范围内的春天到达日期是更大的部分移民比完全移民，这表明迁徙的多样性也可能有助于促进物种对气候变化的反应。
Declines in migratory species are a pressing concern worldwide, but the mechanisms underpinning these declines are not fully understood. We hypothesised that species with greater within-population variability in migratory movements and destinations, here termed migratory diversity', might be more resilient to environmental change. To test this, we related map-based metrics of migratory diversity to recent population trends for 340 European breeding birds. Species that occupy larger non-breeding ranges relative to breeding, a characteristic we term migratory dispersion', were less likely to be declining than those with more restricted non-breeding ranges. Species with partial migration strategies (i.e. overlapping breeding and non-breeding ranges) were also less likely to be declining than full migrants or full residents, an effect that was independent of migration distance. Recent rates of advancement in Europe-wide spring arrival date were greater for partial migrants than full migrants, suggesting that migratory diversity may also help facilitate species responses to climate change.