Filling knowledge gaps in a threatened shorebird flyway through satellite tracking
Filling knowledge gaps in a threatened shorebird flyway through satellite tracking
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DOI：
10.1111/1365-2664.13474
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发表时间：
2019-08-07
影响因子：
5.7
通讯作者：
Piersma, Theunis
中科院分区：
文献类型：
--
作者：
Chan, Ying-Chi;Tibbitts, T. Lee;Piersma, Theunis
跟踪单个动物活动的卫星技术能够绘制其时空发生模式。这在研究不足或偏远地区特别有用，因为这些地区需要迅速收集相关生态知识，为管理行动提供信息。其中一个区域是东亚，那里的许多潮间带生境正在以前所未有的速度退化，依赖这些生境的滨鸟种群迅速减少。我们研究卫星跟踪的效用，以加快识别沿海网站的保护重要性，在东亚-澳大拉西亚飞行路线。在2015-2017年，我们使用太阳能卫星发射器跟踪了32只大节（Calidris tenuirostris）的迁徙，这是一种广泛分布在飞行路线上的“濒危”滨鸟物种，在非繁殖季节完全依赖于潮间带栖息地觅食。从大绳结的轨迹中，共确定了沿着92个停靠点。令人惊讶的是，这些网站中有63%在我们的研究之前并不被认为是重要的滨鸟网站;事实上，每一个被跟踪的个体都使用了以前不被识别的网站。从飞行路线的地面研究中获得的场地知识在黄海最为完整，而在东南亚、中国南部和俄罗斯东部则普遍缺乏。合成与应用。卫星追踪突出了对滨鸟具有潜在重要性但缺乏生态信息和保护认识的沿海栖息地，例如中国南部和东南亚的栖息地。与此同时，追踪到的个体分布数据可以指导在不太为人所知的地点进行地面调查，以收集有关鸟类数量和栖息地特征的信息。为了确认并随后保护宝贵的沿海生境，应优先考虑通过将鸟类跟踪与地面方法相结合来填补知识空白。
Satellite-based technologies that track individual animal movements enable the mapping of their spatial and temporal patterns of occurrence. This is particularly useful in poorly studied or remote regions where there is a need for the rapid gathering of relevant ecological knowledge to inform management actions. One such region is East Asia, where many intertidal habitats are being degraded at unprecedented rates and shorebird populations relying on these habitats show rapid declines. We examine the utility of satellite tracking to accelerate the identification of coastal sites of conservation importance in the East Asian-Australasian Flyway. In 2015-2017, we used solar-powered satellite transmitters to track the migration of 32 great knots (Calidris tenuirostris), an "Endangered" shorebird species widely distributed in the Flyway and fully dependent on intertidal habitats for foraging during the non-breeding season. From the great knot tracks, a total of 92 stopping sites along the Flyway were identified. Surprisingly, 63% of these sites were not known as important shorebird sites before our study; in fact, every one of the tracked individuals used sites that were previously unrecognized. Site knowledge from on-ground studies in the Flyway is most complete for the Yellow Sea and generally lacking for Southeast Asia, Southern China and Eastern Russia. Synthesis and applications. Satellite tracking highlighted coastal habitats that are potentially important for shorebirds but lack ecological information and conservation recognition, such as those in Southern China and Southeast Asia. At the same time, the distributional data of tracked individuals can direct on-ground surveys at the lesser known sites to collect information on bird numbers and habitat characteristics. To recognize and subsequently protect valuable coastal habitats, filling knowledge gaps by integrating bird tracking with ground-based methods should be prioritized.