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Upwelling systems in the migration ecology of Roseate Terns (Sterna dougallii) breeding in northwest Europe
IBIS ( IF 2.1 ) Pub Date : 2020-12-30 , DOI: 10.1111/ibi.12915
Chris P. F. Redfern 1 , David Kinchin‐Smith 2 , Stephen Newton 3 , Paul Morrison 2 , Mark Bolton 2 , Daniel Piec 2
Affiliation  

For migratory seabirds, staging and wintering areas may be important targets for conservation. Declines of Roseate Tern Sterna dougallii populations have led to conservation initiatives at breeding sites on both sides of the North Atlantic. However, these could be compromised by environmental conditions in non‐breeding areas. The migratory ecology of Roseate Terns is poorly known and we used light‐level biologgers (geolocators) to identify the migratory routes, staging and wintering areas of Roseate Terns from two European colonies. Most birds wintered off the Ghanaian coast in the Gulf of Guinea, but some wintered further west off Sierra Leone and Liberia, or changed locations during the winter. In these areas, cold‐water upwellings of the Guinea Current Large Marine Ecosystem (GCLME) may provide vital foraging resources. Geolocations in combination with temperature measurements and satellite sea‐surface temperature data show that cold‐water upwellings of the Canary Current Large Marine Ecosystem (CCLME) were important areas for migratory staging, particularly on the return migration which was slower than the outward journey. These results emphasize the importance of productive cold‐water upwellings in the migratory ecology of Roseate Terns. The GCLME and CCLME are under threat from over‐exploitation, pollution and climate change; effective conservation of these environments will be important to secure the long‐term future of these and other seabirds.

中文翻译:

西北欧玫瑰燕鸥(Sterna dougallii)繁殖的迁徙生态中的上升流系统

对于迁徙的海鸟而言,分期和越冬地区可能是重要的保护目标。玫瑰燕鸥Sterna dougallii的衰落人口导致了北大西洋两岸繁殖地的保护倡议。但是,在非育种地区,这些条件可能会受到环境条件的影响。玫瑰燕鸥的迁徙生态学鲜为人知,我们使用了轻型生物记录仪(地理定位器)来识别来自两个欧洲殖民地的玫瑰燕鸥的迁徙路线,分期和越冬地区。大多数鸟类在几内亚湾的加纳海岸外越冬,但在塞拉利昂和利比里亚外向西越冬,或者在冬季改变了位置。在这些地区,几内亚当前大型海洋生态系统(GCLME)的冷水上升流可能提供重要的觅食资源。地理位置结合温度测量和卫星海表温度数据表明,金丝雀流大型海洋生态系统(CCLME)的冷水上升流是迁徙阶段的重要区域,特别是在回程迁移方面,这比向外旅行要慢。这些结果强调了生产性冷水上升流对玫瑰燕鸥迁徙生态的重要性。GCLME和CCLME受到过度开发,污染和气候变化的威胁;有效保护这些环境对于确保这些海鸟和其他海鸟的长远未来至关重要。这些结果强调了生产性冷水上升流在玫瑰燕鸥迁徙生态中的重要性。GCLME和CCLME受到过度开发,污染和气候变化的威胁;有效保护这些环境对于确保这些海鸟和其他海鸟的长远未来至关重要。这些结果强调了生产性冷水上升流在玫瑰燕鸥迁徙生态中的重要性。GCLME和CCLME受到过度开发,污染和气候变化的威胁;有效保护这些环境对于确保这些海鸟和其他海鸟的长远未来至关重要。
更新日期:2021-03-04
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