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首页> 外文期刊>The Wilson Bulletin >HABITAT USE BY THE BICKNELL'S THRUSH IN THE ESTRIE REGION, QUEBEC
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HABITAT USE BY THE BICKNELL'S THRUSH IN THE ESTRIE REGION, QUEBEC

机译：魁北克埃克斯特地区比克奈尔河口人居中心的使用

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摘要

Concern has been raised that the viability of Bicknell's Thrush (Catharus bicknelli) populations is precarious due, in part, to threats to its breeding habitat. Qualitative descriptions of habitat use have suggested that the species breeds primarily in dense, high elevation forests of northeastern North America. However, there is little quantitative information on habitat use patterns, which impedes formulation of effective conservation plans. To address this knowledge gap, we characterized the habitat of 42 sites occupied by Bicknell's Thrushes and 19 unoccupied sites on two mountains in the Estrie region, Quebec. Occupied sites were dominated by balsam fir (Abies balsamea) growing at high density, whereas unoccupied sites had a larger component of hardwoods at lower density. We found significant differences in vegetation composition and habitat structure between occupied and unoccupied sites for each mountain separately, and the two combined, though the particular variables distinguishing the two site types varied between the two mountains likely because of differences in management history. Our results show that the structure of occupied habitats may differ among sites even within a single region. However, it was evident that dense balsam fir-dominated habitats were used selectively by Bicknell's Thrushes at both study sites, and that the maintenance of such habitats should be a conservation priority in the Estrie region.
机译：有人担心，比克内尔鹅口疮（Catharus bicknelli）种群的生存能力不稳定，部分原因是对其繁殖栖息地的威胁。对栖息地利用的定性描述表明，该物种主要在北美东北部茂密的高海拔森林中繁殖。但是，关于栖息地使用方式的定量信息很少，这阻碍了有效保护计划的制定。为了解决这一知识鸿沟，我们对魁北克埃斯特里地区的42个被比克内尔鹅口疮所占据的地点和19个空置地点的栖息地进行了描述。被占领的地点以高密度生长的香脂冷杉（Abies balsamea）为主，而未被占领的地点以较低的密度具有更大的阔叶树成分。我们发现，每座山的有人居住和无人居住的地点之间的植被组成和栖息地结构都存在显着差异，并且将两者结合在一起，尽管区分这两个地点类型的特定变量可能由于管理历史的不同而在两个山脉之间有所不同。我们的结果表明，即使在单个区域内，被占领栖息地的结构也可能因地点而异。但是，很明显，在两个研究地点，Bicknell鹅口疮都选择性地使用了以香脂冷杉为主的致密生境，在埃斯特里地区，此类生境的维护应作为保护重点。

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