SPATIAL VARIATION IN BREEDING HABITAT SELECTION BY CERULEAN WARBLERS (SETOPHAGA CERULEA) THROUGHOUT THE APPALACHIAN MOUNTAINS
SPATIAL VARIATION IN BREEDING HABITAT SELECTION BY CERULEAN WARBLERS (SETOPHAGA CERULEA) THROUGHOUT THE APPALACHIAN MOUNTAINS
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DOI：
10.1525/auk.2012.12104
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发表时间：
2013-01-01
期刊：
影响因子：
2.8
通讯作者：
Wigley, T. B.
中科院分区：
文献类型：
--
作者：
Boves, Than J.;Buehler, David A.;Wigley, T. B.
栖息地选择的研究往往是有限的效用，因为他们专注于小的地理区域，未能检查在多个尺度上的行为，或缺乏栖息地决策的适应性后果的评估。这些限制可能会阻碍识别成功的特定地点的管理策略，这是迫切需要的严重下降的物种，如蓝莺（Setophaga cerulea）。我们评估了如何繁殖栖息地的决定，在多个尺度上，以及随后的影响，这些决定对巢的生存，不同的阿巴拉契亚山脉。结构性生境特征的选择在不同地区之间差异很大，特别是在领土范围内。男性在最少的森林景观选择的微生境功能，反映了更封闭的树冠森林条件，而男性在高度森林景观的青睐功能与树冠干扰。巢补丁和巢址属性的女性选择更一致的跨地区，女性选择增加树的大小和林下植被覆盖和减少断面积和中层覆盖。不同研究区域的植物区系偏好相似：白色栎（Quercus alba）、黄瓜树（Magnolia acuminata）和糖枫（Acer saccharum）是首选的巢树，而红栎（Erythrobalanus亚属）和红枫（A.红（rubrum）被避免。栖息地的特点，有关巢的生存也各不相同的研究领域，和首选功能呈负相关巢的生存在一个地区。因此，我们的研究结果表明，大规模的空间异质性可能会影响当地的栖息地选择行为，它可能是必要的，以阐明特定地点的管理策略，蓝莺。接收日期：2012年6月4日，接受日期：2012年11月9日。
Studies of habitat selection are often of limited utility because they focus on small geographic areas, fail to examine behavior at multiple scales, or lack an assessment of the fitness consequences of habitat decisions. These limitations can hamper the identification of successful site-specific management strategies, which are urgently needed for severely declining species like Cerulean Warblers (Setophaga cerulea). We assessed how breeding habitat decisions made by Cerulean Warblers at multiple scales, and the subsequent effects of these decisions on nest survival, varied across the Appalachian Mountains. Selection for structural habitat features varied substantially among areas, particularly at the territory scale. Males within the least-forested landscapes selected microhabitat features that reflected more closed-canopy forest conditions, whereas males in highly forested landscapes favored features associated with canopy disturbance. Selection of nest-patch and nest-site attributes by females was more consistent across areas, with females selecting for increased tree size and understory cover and decreased basal area and midstory cover. Floristic preferences were similar across study areas: White Oak (Quercus alba), Cucumber-tree (Magnolia acuminata), and Sugar Maple (Acer saccharum) were preferred as nest trees, whereas red oak species (subgenus Erythrobalanus) and Red Maple (A. rubrum) were avoided. The habitat features that were related to nest survival also varied among study areas, and preferred features were negatively associated with nest survival at one area. Thus, our results indicate that large-scale spatial heterogeneity may influence local habitat-selection behavior and that it may be necessary to articulate site-specific management strategies for Cerulean Warblers. Received 4 June 2012, accepted 9 November 2012.