Persistence and habitat associations of Purple Martin roosts quantified via weather surveillance radar
Persistence and habitat associations of Purple Martin roosts quantified via weather surveillance radar
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DOI：
10.1007/s10980-015-0279-0
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发表时间：
2016-01-01
影响因子：
5.2
通讯作者：
Kelly, Jeffrey F.
中科院分区：
文献类型：
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作者：
Bridge, Eli S.;Pletschet, Sandra M.;Kelly, Jeffrey F.
几十年来，天气监视雷达（WSR）一直被用来定位紫马丁斯（Progne subis）的栖息地。雷达数据处理和可访问性的改进现在使得有可能在广阔的空间scale.ObjectivesWe定位所有的紫马丁栖息地在北美和使用的数据来评估（1）与栖息地相关的土地覆盖类型（2）栖息地持久性，土地覆盖类型，MethodsWe used mosaiced images of radar reflectivity based on the NEXRAD WSR network to locate 234 Purple Martin rosts that were active between 2009 and 2014.在这些栖息地中，我们通过实地考察和公民科学家的报告对57个栖息地进行了实地调查。我们分配栖息地到不同的类，根据当地的土地覆盖，并使用了各种统计和空间分析，以解决上述objectives.ResultsRoosts主要与森林，农田，城市和水域土地覆盖类型，农田是最常见的。有一个明显的偏好，城市的网站，城市栖息地与高年至一年的持久性。我们没有发现栖息地的持久性和区域人口趋势之间的相关性，从北美繁殖鸟类调查（BBS）.ConclusionsAlthough他们使用的栖息地的多样化阵列，城市栖息地似乎是越来越重要的紫马丁。城市栖息地的持久性很高，这与该物种独特的自然历史及其与人类社会的联系相一致。
Context Weather surveillance radars (WSR) have been used to locate roost sites used by Purple Martins (Progne subis) for decades. Improvements in radar data processing and accessibility now make it possible to monitor roosts over a broad spatial scale.ObjectivesWe sought to locate all of the Purple Martin roosts in North America and to use the data to evaluate (1) the land cover types associated with roosts (2) relationships among roost persistence, land cover type, and regional population trends.MethodsWe used mosaicked images of radar reflectivity based on the NEXRAD WSR network to locate 234 Purple Martin roosts that were active between 2009 and 2014. Of these roosts, we ground-truthed a subset of 57 with site visits and reports from citizen scientists. We assigned roosts to different classes based on local land cover, and used a variety of statistical and spatial analyses to address the objectives listed above.ResultsRoosts were mainly associated with forest, cropland, urban, and water land cover types, with cropland being the most common. There was an apparent preference for urban sites, and urban roosts were associated with the high year-to-year persistence. We found no correlation between roost persistence and regional population trends in data from the North American Breeding Bird Survey (BBS).ConclusionsAlthough they use a diverse array of roosting habitats, urban roosting areas appear to be increasingly important for Purple Martins. Persistence of urban roosts was high, which aligns with the species' unique natural history and its association with human societies.