Full-service hotels, convenience stores, or fire escapes? Evaluating the functional role of stopover sites for Neotropical migrants following passage across the Gulf of Mexico in autumn

IF 1.4 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Avian Conservation and Ecology Pub Date : 2023-01-01 DOI:10.5751/ace-02150-180207
Lauren Solomon, Antonio Celis-Murillo, Michael Ward, Jill Deppe
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Abstract

Nearctic Neotropical migratory songbirds incur the highest mortality during migration. En-route, songbirds rely on a network of stopover sites to rest, refuel, and/or seek refuge during poor weather. Conservation strategies prioritize protection of sites that best meet these needs. However, the specific function of a stopover site is expected to vary in relation to factors, such as geographic location, surrounding landscape, and weather. To identify sites with the highest conservation value for migratory songbirds, a conceptual framework was independently developed to classify sites into three functional categories based on their geographic and landscape features: fire escapes, convenience stores, and full-service hotels. The few attempts to empirically validate this framework have focused on temperate stopover sites. We evaluated the framework by testing the hypothesis that a site’s geographic and landscape characteristics can predict its function. We used capture and radio-tracking data at an island and mainland site in the Yucatan Peninsula, Mexico to quantify mean and variance in daily capture rate, body condition, stopover duration, and departure behavior during autumn, with a focus on four species: Swainson’s Thrush (Catharus ustulatus), Red-eyed Vireo (Vireo olivaceus), Gray Catbird (Dumetella carolinensis), and Prothonotary Warbler (Protonotaria citrea). Our results supported our predictions that the island functions as a fire escape, providing refuge for very high numbers of birds after encountering crosswinds or headwinds over the Gulf of Mexico, and the mainland forest site serves as a full-service hotel. The framework provides valuable insight for strategic conservation planning and management of stopover sites for songbirds. We suggest future studies evaluate the framework’s application to non-forest bird species. Additionally, we encourage collaborative efforts to consolidate and integrate tracking data, capture data from migration banding stations, and radar-based bird density estimates across a broad geography to test the framework’s ability to inform conservation planning across species’ full migratory range.
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提供全方位服务的酒店,便利店,还是防火梯?评估秋季穿越墨西哥湾的新热带候鸟中途停留点的功能作用
新北极新热带候鸟在迁徙过程中死亡率最高。在途中,鸣禽依靠中途停留点网络来休息,加油,或者在恶劣天气时寻求庇护。保护策略优先保护最能满足这些需求的地点。然而,中途站的具体功能预计会因地理位置、周围景观和天气等因素而有所不同。为了确定最具保护价值的候鸟保护区,研究人员独立开发了一个概念框架,根据其地理和景观特征将候鸟保护区划分为三个功能类别:消防通道、便利店和全方位服务酒店。经验验证这一框架的少数尝试集中在温带中途停留地点。我们通过测试场地的地理和景观特征可以预测其功能的假设来评估该框架。在墨西哥尤卡坦半岛的一个岛屿和大陆站点,利用捕获和无线电跟踪数据,量化了秋季每日捕获率、身体状况、停留时间和离境行为的均值和方差,重点研究了四个物种:天鹅画眉(Catharus ustulatus)、红眼鸟(Vireo olivaceus)、灰猫鸟(Dumetella carolinensis)和原花莺(Protonotaria citrea)。我们的研究结果支持了我们的预测,即该岛可以作为一个消防通道,在遇到墨西哥湾的侧风或逆风后为大量鸟类提供避难所,而大陆森林地点可以作为一个全方位服务的酒店。该框架为鸣禽中途停留地的战略性保护规划和管理提供了有价值的见解。我们建议未来的研究评估该框架在非森林鸟类中的应用。此外,我们鼓励合作巩固和整合跟踪数据,从迁徙带站捕获数据,以及基于雷达的鸟类密度估算,以测试该框架在物种整个迁徙范围内为保护规划提供信息的能力。
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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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