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Relationship of Peromyscus Mice to Hemlock and Nonhemlock Forest Communities of the Cumberland Plateau, Tennessee

机译：田鼠的Peromyscus小鼠与铁杉和非铁杉森林群落的关系

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摘要

The invasive hemlock woolly adelgid (Adelges tsugae ) (HWA) causes widespread mortality to eastern hemlock ( Tsuga canadensis) trees in the United States and was first documented on the Cumberland Plateau, Tennessee in 2008. Many studies have examined the impact of lost hemlock habitat on birds, salamanders, aquatic invertebrates, and ants, but few on small mammals, especially in the southern extent of the eastern hemlock range.;In 2013 and 2014, hemlock and associated non-hemlock stands in Putnam, White, and Van Buren counties on the Cumberland Plateau in Tennessee were sampled to look for relationships between forest composition and the rodent community composition in hemlock forests prior to tree loss expected from HWA infestation. The invertebrate community was also sampled to examine differences between hemlock and non-hemlock stands. Further, vegetative variables were measured to determine if differences between hemlock and non-hemlock stands influenced the small mammal community.;Peromyscus captures were greater in hemlock stands (Putnam County p = 0.0146, White County p = 0.0005, Van Buren County p = 0.0495) than control stands. A model was developed using logistic regression where five vegetative variables were predictive of mice captures; three (hemlock stem count, canopy density, and horizontal ground cover) included odds ratios higher than one. Additionally, the arthropod Order Polydesmida was more abundant in non-hemlock stands (Putnam County p < 0.001, White County p = 0.001, Van Buren County p =0.006.) It is unclear if greater mice captures in hemlock and greater abundance of Polydesmida in non-hemlock stands is indicative of a relationship between eastern hemlock trees, certain millipedes and Peromyscus mice. However, changes to Cumberland Plateau forest structure resulting from hemlock mortality via HWA may impact Peromyscus species composition locally with increased Peromyscus leucopus populations and decreased Peromyscus maniculatus populations.
机译：入侵性铁杉羊毛adelgid（Adelges tsugae）（HWA）在美国导致东部铁杉（Tsuga canadensis）树木广泛死亡，并于2008年在田纳西州的坎伯兰高原首次得到记录。许多研究已经研究了失去的铁杉栖息地的影响。在鸟类，sal，水生无脊椎动物和蚂蚁上，但在小型哺乳动物上很少，特别是在东部铁杉范围的南部。； 2013年和2014年，普特南，怀特和范布伦县的铁杉和相关的非铁杉在田纳西州坎伯兰高原的坎普兰地区进行了抽样调查，以寻找铁杉林中森林组成与啮齿类动物群落组成之间的关系，然后再从HWA侵染中预计树木损失。还对无脊椎动物社区进行了抽样，以检查铁杉和非铁杉立场之间的差异。此外，还测量了营养变量以确定铁杉和非铁杉林之间的差异是否影响了小型哺乳动物群落。;铁杉林中的红皮草捕获量更大（Putnam县p = 0.0146，White County p = 0.0005，Van Buren县p = 0.0495 ），而不是控制站。使用logistic回归开发了一个模型，其中五个营养变量可以预测小鼠的捕获情况。三个（铁杉茎数，冠层密度和水平地面覆盖率）的比值比均大于1。此外，节肢动物节肢动物在非铁杉林中的分布更为丰富（Putnam县p <0.001，怀特县p = 0.001，范布伦县p = 0.006。）目前尚不清楚是否有更多的老鼠在铁杉中捕获并在河豚草中有更多的Polydesmida。非铁杉立场表明东部铁杉树，某些千足虫和Peromyscus小鼠之间的关系。然而，由于HWA的铁杉死亡率导致坎伯兰高原森林结构的变化可能会影响当地的Peromyscus物种组成，其中Peromyscus leucopus种群增加，而Peromyscus maniculatus种群减少。

著录项

  • 作者

    Howser, Karen S.;

  • 作者单位

    Tennessee Technological University.;

  • 授予单位 Tennessee Technological University.;
  • 学科 Biology.;Ecology.;Wildlife conservation.
  • 学位 M.S.
  • 年度 2017
  • 页码 66 p.
  • 总页数 66
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地下建筑;
  • 关键词

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