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首页> 外文期刊>Canadian Journal of Zoology >Nest-site characteristics and breeding success of three species of boreal songbirds in western Newfoundland, Canada
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Nest-site characteristics and breeding success of three species of boreal songbirds in western Newfoundland, Canada

机译：加拿大纽芬兰西部三种北方鸣禽的巢穴特征和繁殖成功

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摘要

Delineating habitat requirements and preferences of species is essential for conservation planning. We studied nest habitat use and effects of microsite vegetation characteristics on breeding success of yellow-rumped warblers (Dendroica coronata (L., 1766)), blackpoll warblers (Dendroica striata (J.R. Forster, 1772)), and white-throated sparrows (Zonotrichia albicollis (Gmelin, 1789)) in an area with a low extent (< 6% of available land) of forest harvest in northwestern Newfoundland. During 2004 and 2005, 99 nests were located and monitored, and the characteristics of nest sites measured. Vegetation at yellow-rumped and blackpoll warbler nest sites differed from random sites; however, within used sites, no vegetation characteristics were significantly associated with success. White-throated sparrow nest sites contained more downed wood and less ground vegetation than did random sites; however, successful nests were associated with different variables than those that distinguished them from random sites, including less canopy cover and less woody debris. Thus, whereas yellow-rumped and blackpoll warblers used specific nest-site characteristics and white-throated sparrows had higher nest success associated with certain characteristics, the nest characteristics these birds appeared to choose did not have demonstrable fitness benefits.
机译：划定栖息地要求和物种偏好对于保护规划至关重要。我们研究了巢生境的使用以及微地点植被特征对黄腰莺（Dendroica coronata（L.，1766）），黑脚莺（Dendroica striata（JR Forster，1772））和白喉麻雀（Zonotrichia）繁殖成功的影响纽芬兰西北部森林收成程度较低（<可用土地的6％）的地区（白化病（Gmelin，1789））。在2004年和2005年期间，对99个巢穴进行了定位和监控，并测量了巢穴的特征。黄腰和黑点莺巢点的植被与随机点不同。但是，在使用地点内，没有植被特征与成功有显着联系。白喉麻雀巢站点比随机站点包含更多的被砍伐的木材和更少的地面植被。然而，成功的巢与不同的变量相关联，而不是将它们与随机位置区别开来的变量，包括更少的树冠覆盖和更少的木屑。因此，虽然黄腰and和黑po莺使用了特定的巢位特征，而白喉麻雀则具有与某些特征相关的较高巢成功率，但这些鸟似乎选择的巢特征却没有明显的适应性益处。

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