Patterns of stable isotope signatures in willow warbler Phylloscopus trochilus feathers collected in Africa
Patterns of stable isotope signatures in willow warbler Phylloscopus trochilus feathers collected in Africa
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DOI：
10.1111/j.2006.0908-8857.03628.x
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发表时间：
2006-07-01
影响因子：
1.7
通讯作者：
Åkesson, S
中科院分区：
文献类型：
--
作者：
Bensch, S;Bengtsson, G;Åkesson, S
我们对从非洲柳莺身上获得的羽毛进行了氮和碳的稳定同位素分析，以找到先前观察到的跨越斯堪的纳维亚中部迁徙分界线的不同三角洲N-15和三角洲C-13值模式的解释。一个新的数据集证实，北斯堪的纳维亚亚种P. t. acredula的鸟类比南斯堪的纳维亚亚种P. t. trochilus的鸟类具有更高的N-15值。在非洲，我们发现从主要地理区域收集的羽毛之间以及区域内国家之间的δ N-15和δ C-13值存在显著差异。斯堪的纳维亚增生带N-15和C-13的同位素特征与非洲南部柳莺的同位素特征吻合较好，但与东非和西非柳莺的同位素特征存在差异。斯堪的纳维亚trochilus的同位素特征与非洲三个地区（西部、东部和南部）的模式都不一致。然而，对来自西非国家的羽毛同位素数据进行了更详细的分析，发现这些羽毛与来自利比里亚、科特迪瓦和尼日利亚的样本相对应。西非国家是瑞典鹬的越冬地区。
We conducted stable isotope analyses of nitrogen and carbon on feathers obtained from willow warblers in Africa to find an explanation for a previously observed pattern of different delta N-15 and delta C-13 values across a migratory divide in central Scandinavia. A new data set confirms that north Scandinavian birds of the subspecies P. t. acredula have higher delta N-15 values than south Scandinavian birds of the subspecies P. t. trochilus. In Africa, we found significant differences for both delta N-15 and delta C-13 values among feathers collected from major geographical regions as well as between countries within regions. Isotope signatures of delta N-15 and delta C-13 in Scandinavian acredula matched well with those of willow warblers sampled in southern parts of Africa, but differed from samples obtained in East and West Africa. Isotope signatures in Scandinavian trochilus did not agree with the pattern in any of the three African regions (West, East or South). However, a more detailed analysis of the isotopic data in feathers from countries within West Africa, which is the wintering region of Swedish trochilus based on ringing recoveries, revealed a correspondence with samples from Liberia, the Ivory Coast and Nigeria.