非繁殖期金翅林莺和蓝翅林莺的生境关系

IF 1.4 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
David I. King, Michael E. Akresh, David Murillo, Ruth E. Bennett, R. Chandler
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引用次数: 0

摘要

。金翅林莺和蓝翅林莺都是值得高度关注的新热带迁徙物种,它们在中美洲越冬地的分布重叠,但它们在栖息地使用方面的重叠程度尚不清楚,这可能会阻碍保护工作。2016年和2017年,我们在洪都拉斯Yoro的咖啡种植景观中沿着栖息地和海拔梯度调查了这两个物种。我们使用了一种已知的带有蜂群轨迹的回放来增强对雌性莺的探测,因为检查性别栖息地隔离是我们研究的另一个目标。两种林莺的生境存在差异,雄性金翅林莺出现在海拔较高的以湿润森林/咖啡为主的景观中(森林中有一些浓密的荫咖啡,在我们的站点遥感无法区分),而雄性蓝翅林莺则出现在海拔较高的景观中,这与景观中的农业数量呈正相关。7只雌性金翅林莺中有6只在遮荫咖啡中遇到,然而,这种联系并不显著,可能是由于样本规模小,可探测性低。雄性金翅莺与潮湿的森林/咖啡和海拔之间的联系,以及雄性和雌性金翅莺在栖息地使用上的对比,与该地区先前的研究一致。此外,这些非繁殖期蚯蚓目物种的景观关联反映了它们的繁殖期景观关联,金翅林莺占据更多的森林景观,蓝翅林莺占据更多的农业景观。雌性金翅林莺和蓝翅林莺使用遮荫咖啡表明农林业可能是保护这些物种越冬种群的一种有前途的工具,尽管考虑到据报道使用遮荫咖啡会增加其他迁徙物种被捕食的风险,这一结果应该谨慎看待
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Habitat associations of Golden-winged Warblers and Blue-winged Warblers during the non-breeding season
. The Golden-winged Warbler ( Vermivora chyrsoptera ) and Blue-winged Warbler ( Vermivora cyanoptera ) are both Neotropical migratory species of elevated conservation concern that overlap in distribution on their Central American wintering grounds, yet the extent to which they overlap in terms of habitat use is unknown, potentially hindering conservation efforts. We surveyed these two species along habitat and elevational gradients within a coffee-growing landscape during 2016 and 2017 in Yoro, Honduras. We used playback with a mobbing track known to enhance detections of female warblers, since examining sexual habitat segregation was another objective of our study. Habitat occupied by these two species differed, with male Golden-winged Warblers occurring in landscapes dominated by humid forest/coffee (forest with some dense shade coffee, which were indistinguishable with remote sensing at our sites) at higher elevations than male Blue-winged Warblers, which were positively associated with the amount of agriculture in the landscape. Six of seven female Golden-winged Warblers were encountered in shade coffee, however, this association was not significant, likely due to small sample size and low detectability. The association between male Golden-winged Warblers and humid forest/coffee and elevation, and contrasts in habitat use between male and female Golden-winged Warblers, are consistent with prior research in the region. Furthermore, the landscape associations of these non-breeding Vermivora species mirror their breeding landscape associations, with Golden-winged Warblers occupying more forested landscapes and Blue-winged Warblers occupying more agricultural landscapes. The use of shade coffee by female Golden-winged Warblers and Blue-winged Warblers suggests agroforestry could be a promising tool for conserving wintering populations of these species, although this result should be viewed with caution given that use of shade coffee is reported to elevate predation risk in other migratory species
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来源期刊
Avian Conservation and Ecology
Avian Conservation and Ecology BIODIVERSITY CONSERVATION-ORNITHOLOGY
CiteScore
2.20
自引率
7.10%
发文量
43
审稿时长
>12 weeks
期刊介绍: Avian Conservation and Ecology is an open-access, fully electronic scientific journal, sponsored by the Society of Canadian Ornithologists and Birds Canada. We publish papers that are scientifically rigorous and relevant to the bird conservation community in a cost-effective electronic approach that makes them freely available to scientists and the public in real-time. ACE is a fully indexed ISSN journal that welcomes contributions from scientists all over the world. While the name of the journal implies a publication niche of conservation AND ecology, we think the theme of conservation THROUGH ecology provides a better sense of our purpose. As such, we are particularly interested in contributions that use a scientifically sound and rigorous approach to the achievement of avian conservation as revealed through insights into ecological principles and processes. Papers are expected to fall along a continuum of pure conservation and management at one end to more pure ecology at the other but our emphasis will be on those contributions with direct relevance to conservation objectives.
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