Changes in Small Mammal Microhabitat Use Following Silvicultural Disturbance
Changes in Small Mammal Microhabitat Use Following Silvicultural Disturbance
复制标题
造林干扰后小型哺乳动物微生境利用的变化
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Swihart
中科院分区：
文献类型：
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作者：
K. Kellner;R. Swihart
摘要营林干扰会导致森林的生物和非生物特性发生重大变化，对野生动物产生重大影响。许多研究表明，在森林培育后，小型哺乳动物的栖息地占有率和丰度发生了变化，但很少有人确定与小型哺乳动物反应相关的栖息地特征。我们在美国中部阔叶林地区进行了一项研究，以考察小型哺乳动物栖息地使用与微小地点尺度的栖息地变量之间的关系，在森林培育干扰前后，同时明确说明不完善的检测。在开割后，植被盖度和粗木质碎屑增加，落叶深度减少。在防护林收获的中层移除阶段之后，发生的变化较少。东部花栗鼠(Tamias Striatus)和白足鼠(Permyscus Leucopus)与木本植被盖度和粗木质碎屑呈正相关，短尾地鼠(Blarina Brevicauda)与粗木质碎屑和落叶深度呈正相关。仔细考虑实验规模和纳入检测概率对于成功识别微生境内的小型哺乳动物协会是必要的，因为这些关系有助于解释森林培育后小型哺乳动物群落的变化。
Abstract Silvicultural disturbance can lead to major shifts in biotic and abiotic characteristics of forests, with significant implications for wildlife. Many studies have demonstrated site occupancy and abundance of small mammals changes following silviculture, but few have identified the habitat characteristics associated with small mammal responses. We conducted a study in the central hardwood forest region of the U.S. to examine the relationship between small mammal habitat use and habitat variables at the microsite scale, before and after silvicultural disturbance, while explicitly accounting for imperfect detection. Following the creation of harvest openings, vegetation cover and coarse woody debris increased, and leaf litter depth decreased. Fewer changes occurred following the midstory removal stage of a shelterwood harvest. Eastern chipmunks (Tamias striatus) and white-footed mice (Peromyscus leucopus) were positively correlated with woody vegetation cover and coarse woody debris, and short-tailed shrews (Blarina brevicauda) were positively correlated with coarse woody debris and leaf litter depth. Careful consideration of experimental scale and incorporation of detection probability are necessary for successful identification of small mammal associations within microhabitats, as these relationships help to explain shifts in small mammal communities following silviculture.