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首页> 外文期刊>Trends in Ecology & Evolution >Habitat selection by spotted owls after a megafire reflects their adaptation to historical frequent-fire regimes
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Habitat selection by spotted owls after a megafire reflects their adaptation to historical frequent-fire regimes

机译：在梅法雷后发现了斑点猫头鹰的栖息地选择他们对历史频繁消防制度的适应

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Context Climate and land-use change have led to disturbance regimes in many ecosystems without a historical analog, leading to uncertainty about how species adapted to past conditions will respond to novel post-disturbance landscapes. Objectives We examined habitat selection by spotted owls in a post-fire landscape. We tested whether selection or avoidance of severely burned areas could be explained by patch size or configuration, and whether variation in selection among individuals could be explained by differences in habitat availability. Methods We applied mixed-effects models to GPS data from 20 spotted owls in the Sierra Nevada, California, USA, with individual owls occupying home ranges spanning a broad range of post-fire conditions after the 2014 King Fire. Results Individual spotted owls whose home ranges experienced less severe fire (< 5% of home range severely burned) tended to select severely burned forest, but owls avoided severely burned forest when more of their home range was affected ( 5-40%). Owls also tended to select severe fire patches that were smaller in size and more complex in shape, and rarely traveled > 100-m into severe fire patches. Spotted owls avoided areas that had experienced post-fire salvage logging but the interpretation of this effect was nuanced. Owls also avoided areas that were classified as open and/or young forest prior to the fire. Conclusions Our results support the hypothesis that spotted owls are adapted to historical fire regimes characterized by small severe fire patches in this region. Shifts in disturbance regimes that produce novel landscape patterns characterized by large, homogeneous patches of high-severity fire may negatively affect this species.
机译：背景气候和土地利用变化导致许多生态系统中没有历史模拟的干扰制度，从而导致适应过去条件的物种如何应对新的干扰后景观。目的我们在火后景观中审查了斑点猫头鹰的栖息地选择。我们测试了是否可以通过补丁尺寸或配置来解释选择或避免受烧伤区域的选择或避免，以及个人之间的选择变异是否可以通过栖息地可用性的差异来解释。方法我们将混合效应模型应用于来自美国塞拉尼亚山脉内华达州的20次斑点猫头鹰的GPS数据，在2014年国王火灾后占据了广泛的火灾后条件的单个猫头鹰。结果各个斑点猫头鹰的家庭范围严重的火灾（<5％的家庭范围严重烧毁）倾向于选择严重烧毁的森林，但是当他们更多的家庭范围受到影响时，猫头鹰避免了严重燃烧的森林（5-40％）。猫头鹰还倾向于选择严重的火贴片，尺寸较小，形状更复杂，很少行驶> 100米进入严重的火斑块。斑点猫头鹰避免了经历了火灾后救生记录的地区，但对这种效果的解释是细致的。猫头鹰还避免了在火灾之前被归类为开放和/或年轻森林的地区。结论我们的结果支持发现斑点猫头鹰适应该地区小严重防火斑块的历史防火制度的假设。在扰动制度中转变产生的新景观模式，其特征在于大幅度大，均匀性斑块的均匀性斑块可能会对此物种产生负面影响。

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