Abstract Increasing frequency and severity of wildfire may jeopardize persistence of large tracts of late seral forest, raising concerns over population viability of forest-dependent species like the Northern Goshawk (Accipiter gentilis). We tracked 20 adult Northern Goshawks with GPS loggers over 4 years to investigate roosting (nocturnal) and foraging (diurnal) habitat selection in a heterogeneously burned forest landscape of the Sierra Nevada mountains of California, United States. Goshawks selected late seral forest attributes for both roosting and foraging at multiple spatio-temporal scales, although at the finest (daily) scale, goshawks selected more diverse forest structure that included small trees and medium canopy cover. Less than 6% of roosts were in areas burned in the last 50 years and goshawks avoided areas burned at high severity when roosting and when foraging across spatial scales. Four goshawks (3 males, 1 female) undertook forays >5 km from their nest location, two of which forayed into burned areas during at least one season. High severity fire is likely to make forests unsuitable foraging or roosting habitat for Northern Goshawks, although lower severity fire may provide foraging opportunities for this generalist predator. Eighty percent of foraging space use and 87% of roost locations were considered high fire hazard potential, suggesting that goshawk habitat in western North America is likely to be reduced by predicted increases in fire frequency and severity in the region.

中文翻译：

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北苍鹰（Accipiter gentilis）在易火森林中的多尺度栖息地选择

摘要 野火的频率和严重程度的增加可能危及大片晚期热带森林的持久性，引起对诸如北苍鹰 (Accipiter gentilis) 等依赖森林的物种种群生存能力的担忧。我们在 4 年多的时间里用 GPS 记录器跟踪了 20 只成年北苍鹰，以调查美国加利福尼亚州内华达山脉异质燃烧森林景观中的栖息（夜间）和觅食（昼夜）栖息地选择。苍鹰在多个时空尺度上为栖息和觅食选择了晚期 seral 森林属性，尽管在最好的（每日）尺度上，苍鹰选择了更多样化的森林结构，包括小树和中等树冠覆盖。在过去 50 年中，只有不到 6% 的栖息地位于被烧毁的区域，苍鹰在栖息和跨空间尺度觅食时避开了严重烧毁的区域。四只苍鹰（3 只雄性，1 只雌性）在离巢穴 5 公里以上的地方进行了突袭，其中两只苍鹰在至少一个季节进入了被烧毁的区域。高烈度火灾可能使森林不适合北方苍鹰觅食或栖息，尽管低烈度火灾可能为这种多面手捕食者提供觅食机会。80% 的觅食空间使用和 87% 的栖息地点被认为具有高火灾危险性，这表明北美西部的苍鹰栖息地可能会因该地区火灾频率和严重程度的预测增加而减少。1 只雌性）在离巢穴 5 公里以上的地方进行了攻击，其中至少有两个在至少一个季节进入了被烧毁的区域。高烈度火灾可能使森林不适合北方苍鹰觅食或栖息，尽管低烈度火灾可能为这种多面手捕食者提供觅食机会。80% 的觅食空间使用和 87% 的栖息地点被认为具有高火灾危险性，这表明北美西部的苍鹰栖息地可能会因该地区火灾频率和严重程度的预测增加而减少。1 只雌性）在离巢穴 5 公里以上的地方进行了攻击，其中至少有两个在至少一个季节进入了被烧毁的区域。高烈度火灾可能使森林不适合北方苍鹰觅食或栖息，尽管低烈度火灾可能为这种多面手捕食者提供觅食机会。80% 的觅食空间使用和 87% 的栖息地点被认为具有高火灾危险性，这表明北美西部的苍鹰栖息地可能会因该地区火灾频率和严重程度的预测增加而减少。尽管较低严重程度的火可能为这种多面手捕食者提供觅食机会。80% 的觅食空间使用和 87% 的栖息地点被认为具有高火灾危险性，这表明北美西部的苍鹰栖息地可能会因该地区火灾频率和严重程度的预测增加而减少。尽管较低严重程度的火可能为这种多面手捕食者提供觅食机会。80% 的觅食空间使用和 87% 的栖息地点被认为具有高火灾危险性，这表明北美西部的苍鹰栖息地可能会因该地区火灾频率和严重程度的预测增加而减少。