California Spotted Owl (Strix occidentalis occidentalis) habitat use patterns in a burned landscape
California Spotted Owl (Strix occidentalis occidentalis) habitat use patterns in a burned landscape
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DOI：
10.1650/condor-16-184.1
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发表时间：
2017-08-01
期刊：
影响因子：
3.1
通讯作者：
Johnson, Matthew D.
中科院分区：
文献类型：
--
作者：
Eyes, Stephanie A.;Roberts, Susan L.;Johnson, Matthew D.
火灾是一个动态的生态系统过程中的混合针叶林的塞拉利昂内华达州，但有有限的科学信息解决野生动物栖息地使用烧毁的景观。最近的研究提出了相互矛盾的信息，关于林分取代野火对斑点猫头鹰（Strix oceanentalis）及其栖息地的影响。虽然火灾促进异质森林景观猫头鹰青睐，高严重性火灾可能会产生大的树冠间隙，可以片段封闭的树冠栖息地的首选斑点猫头鹰。我们使用无线电遥测技术来确定觅食的加州斑点猫头鹰（S。O.在美国加州的约塞米蒂国家公园，octagentalis）表现出在其活动范围内对特定火灾严重程度斑块类型的选择。我们的研究结果表明，斑点猫头鹰表现出较强的栖息地选择范围内的栖息地和边缘栖息地附近的位置，和较低的火灾严重程度补丁类型的弱选择。虽然猫头鹰选择高对比度的边缘具有更大的相对概率比低对比度的边缘，我们没有检测到这些概率之间的统计差异。通过机械间伐或规定的火灾保护森林不受林分取代火灾的影响是管理机构的优先事项，我们的研究结果表明，低至中等严重程度的火灾可以在加州斑点猫头鹰的家园范围内创造有利于觅食的栖息地条件。
Fire is a dynamic ecosystem process of mixed-conifer forests of the Sierra Nevada, but there is limited scientific information addressing wildlife habitat use in burned landscapes. Recent studies have presented contradictory information regarding the effects of stand-replacing wildfires on Spotted Owls (Strix occidentalis) and their habitat. While fire promotes heterogeneous forest landscapes shown to be favored by owls, high severity fire may create large canopy gaps that can fragment the closed-canopy habitat preferred by Spotted Owls. We used radio-telemetry to determine whether foraging California Spotted Owls (S. o. occidentalis) in Yosemite National Park, California, USA, showed selection for particular fire severity patch types within their home ranges. Our results suggested that Spotted Owls exhibited strong habitat selection within their home ranges for locations near the roost and edge habitats, and weak selection for lower fire severity patch types. Although owls selected high contrast edges with greater relative probabilities than low contrast edges, we did not detect a statistical difference between these probabilities. Protecting forests from stand-replacing fires via mechanical thinning or prescribed fire is a priority for management agencies, and our results suggest that fires of low to moderate severity can create habitat conditions within California Spotted Owls' home ranges that are favored for foraging.