Long-distance post-release movements challenge the metapopulation restoration of Bearded Vultures

IF 2.7 3区 环境科学与生态学 Q2 ECOLOGY
Ecosphere Pub Date : 2024-08-20 DOI:10.1002/ecs2.4856
Cécile Tréhin, Olivier Duriez, François Sarrazin, Benoit Betton, Jocelyn Fonderflick, Franziska Loercher, Etienne Marlé, Jean-Francois Seguin, Julien Traversier, Noémie Ziletti, Jean-Baptiste Mihoub
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引用次数: 0

Abstract

Restoring ecological dynamics is a key objective of conservation translocations. Exemplarily, reconnecting the reintroduced alpine populations with native Pyrenean populations through re-establishing locally extinct populations in between, in the Causses and the Pre-Alps, is a major goal for the long-term conservation of Bearded Vultures in Europe. Understanding Bearded Vultures' post-release movements and foraging behavior is critical to understanding the settlement of newly restored populations and to supporting conservation measures. The telemetric monitoring of 43 translocated and wild-born juveniles allowed us to investigate whether differences exist in post-release movements and foraging behavior during the first year of life between reintroduced and native populations. Medium- and long-distance exploration movements start during the spring following fledging for both translocated and wild-born individuals. However, birds translocated in the most distant release site (Causses) exhibited greater exploration distances with no clear directional movement pattern, had smaller home ranges, and had a stronger preference for supplementary feeding stations than those from other populations. Although some birds translocated in the Pre-Alps displayed similar behaviors, the pattern is not as strong as in the Causses, likely because of the proximity to the breeding populations reintroduced in the Alps or differences in the number and management of supplementary feeding stations. Preference for supplementary feeding stations (SFS) mostly occurred in the Pre-Alps and the native populations, but was lower in the Causses. Seasonal variations in SFS preference were consistent among populations, with a peak in the first spring following fledging. Beyond documenting post-release movements in Bearded Vultures, we suggest better accounting for the demographic consequences of behaviors to track conservation translocation effectiveness, at both local and regional scales.

Abstract Image

放归后的长途迁徙给胡兀鹫的种群恢复带来挑战
恢复生态动态是保护性迁移的一个关键目标。例如,通过在高山和前阿尔卑斯山之间重建当地已灭绝的种群,将重新引入的高山种群与比利牛斯原生种群重新连接起来,是在欧洲长期保护大胡子秃鹫的一个主要目标。了解大胡子秃鹫放归后的活动和觅食行为对于了解新恢复种群的定居情况和支持保护措施至关重要。通过对 43 只转运幼鸟和野生幼鸟进行遥测监测,我们研究了放归后第一年的活动和觅食行为在重引入种群和本地种群之间是否存在差异。中长距离觅食活动从幼鸟羽化后的春季就开始了。然而,与其他种群的鸟类相比,在最远的释放地点(高斯)移居的鸟类表现出更大的探索距离,但没有明确的运动方向,家域范围较小,对补充饲喂站有更强的偏好。虽然阿尔卑斯山前区的一些鸟类表现出类似的行为,但这种模式不如高斯区强烈,这可能是因为离阿尔卑斯山重新引入的繁殖种群较近,或补充饲喂站的数量和管理存在差异。对补充饲喂站(SFS)的偏好主要发生在阿尔卑斯山前区和本地种群,但在高山区则较低。不同种群对补充饲喂站的偏好具有一致的季节性变化,在羽化后的第一个春天达到高峰。除了记录大胡子秃鹫放归后的活动外,我们还建议更好地考虑其行为对人口的影响,以便在地方和区域范围内跟踪保护性迁移的效果。
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来源期刊
Ecosphere
Ecosphere ECOLOGY-
CiteScore
4.70
自引率
3.70%
发文量
378
审稿时长
15 weeks
期刊介绍: The scope of Ecosphere is as broad as the science of ecology itself. The journal welcomes submissions from all sub-disciplines of ecological science, as well as interdisciplinary studies relating to ecology. The journal''s goal is to provide a rapid-publication, online-only, open-access alternative to ESA''s other journals, while maintaining the rigorous standards of peer review for which ESA publications are renowned.
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