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首页> 外文期刊>The condor >Stopover ecology of autumn landbird migrants in the Boise foothills of southwestern Idaho
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Stopover ecology of autumn landbird migrants in the Boise foothills of southwestern Idaho

机译：爱达荷州西南部博伊西山麓的秋季陆鸟迁徙者的停留生态

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The topography of western North America provides a complex landscape for landbird migrants, and stopover patterns in this region are poorly understood. We examined seven years of stopover data (1997-2003) from a montane area in southwestern Idaho to determine whether this area provides Suitable stopover habitat. We compared the proportion of birds recaptured, stopover duration. and changes in energetic condition within and among species and between two mist-netting, sites located in different habitats. The proportion of birds recaptured ranged from zero to over 20%, and fewer than 5% of individuals were recaptured in most species. Mean minimum stopover durations from recapture data ranged from I to 10 days: most species averaged less than 6 days. Stopover duration estimates from open-populations models were comparable but generally greater than estimates from recapture data. As found in stopover studies from other regions, stopover metrics varied within and among species in Idaho. However, most migrants in this study exhibited an ability to gain mass, evidenced both by recapture data and by regression of energetic condition against time since sunrise. These data imply that montane habitats in Idaho are suitable stopover sites. It follows that these habitats might serve an important role for many landbird migrants during the period of late summer molt and autumn migration. a time when many lowland areas of the West, including some riparian systems, are especially arid. We suggest that including montane nonriparian habitats in future stopover ecology Studies will allow for a more complete understanding of migrant habitat needs in the West.
机译：北美西部的地形为陆鸟移民提供了复杂的景观，对该地区的中途停留模式知之甚少。我们检查了爱达荷州西南部山区的七年中途停留数据（1997-2003年），以确定该地区是否提供合适的中途停留栖息地。我们比较了被捕获的鸟类比例，中途停留时间。物种内部和物种之间以及位于不同栖息地的两个雾网站点之间的能量状态变化。被捕获的鸟类比例从零到超过20％不等，在大多数物种中，只有不到5％的个体被捕获。从捕获数据中得出的平均最小中途停留时间为1到10天：大多数物种平均不到6天。来自开放人口模型的中途停留时间估计值具有可比性，但通常大于重新捕获数据的估计值。正如在其他地区的中途停留研究中发现的那样，中途停留指标在爱达荷州的物种内部和物种之间有所不同。但是，这项研究中的大多数移民都表现出增加体重的能力，这既可以通过重获数据，也可以通过日出后精力充沛的状况相对时间的回归来证明。这些数据表明，爱达荷州的山地栖息地是合适的中转站。因此，在夏末蜕皮和秋季迁徙期间，这些栖息地可能对许多陆鸟迁徙者起重要作用。西部许多低地地区，包括一些河岸系统，特别干旱。我们建议将山地非河岸生境纳入未来的中途停留生态学研究中，将有助于更全面地了解西方的移民生境需求。

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