Modeling the Effects of Fire Severity and Spatial Complexity on Small Mammals in Yosemite National Park, California
Modeling the Effects of Fire Severity and Spatial Complexity on Small Mammals in Yosemite National Park, California
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模拟火灾严重程度和空间复杂性对加利福尼亚州优胜美地国家公园小型哺乳动物的影响
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Lutz
中科院分区：
文献类型：
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作者：
S. Roberts;S. Roberts;J. W. Wagtendonk;A. Miles;D. Kelt;J. Lutz
我们评估了美国加利福尼亚州约塞米蒂国家公园 2 至 15 岁烧伤中火灾严重程度以及相关空间和植物参数对小型哺乳动物种群的影响。我们还开发了栖息地模型，可以预测小型哺乳动物对不同严重程度的火灾的反应。我们假设火灾的严重程度会通过植被组成、结构和空间栖息地复杂性的变化影响小型哺乳动物的丰度。鹿鼠 (Peromyscus maniculatus) 的丰度对火灾严重程度呈负向反应，而灌丛鼠 (P boylii) 的丰度随着橡树 (Quercus spp.) 覆盖面积的增加而增加。花栗鼠（Neotamias spp.）丰度的最佳预测是通过结合对橡树覆盖的负面反应和对空间栖息地复杂性的正面反应。加州地松鼠（Spermophilus beecheyi）的丰度随着空间栖息地复杂性的增加而增加。我们的结果表明，火灾的严重程度以及随后植被结构和栖息地空间复杂性的变化可以影响小型哺乳动物的丰度模式。
We evaluated the impact of fire severity and related spatial and vegetative parameters on small mammal populations in 2 yr- to 15 yr-old burns in Yosemite National Park, California, USA. We also developed habitat models that would predict small mammal responses to fires of differing severity. We hypothesized that fire severity would influence the abundances of small mammals through changes in vegetation composition, structure, and spatial habitat complexity. Deer mouse (Peromyscus maniculatus) abundance responded negatively to fire severity, and brush mouse (P boylii) abundance increased with increasing oak tree (Quercus spp.) cover. Chipmunk (Neotamias spp.) abundance was best predicted through a combination of a negative response to oak tree cover and a positive response to spatial habitat complexity. California ground squirrel (Spermophilus beecheyi) abundance increased with increasing spatial habitat complexity. Our results suggest that fire severity, with subsequent changes in vegetation structure and habitat spatial complexity, can influence small mammal abundance patterns.