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首页> 外文学位 >Impacts of beech bark disease on stand composition and wildlife resources in Michigan.
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Impacts of beech bark disease on stand composition and wildlife resources in Michigan.

机译：山毛榉树皮病对密歇根州林分组成和野生动植物资源的影响。

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摘要

Beech bark disease was discovered in Michigan in 2000 and will likely kill at least 50% of mature American beech trees. Our study was designed to collect benchmark data that will allow us, in future studies, to determine how understory composition, wildlife resources, and stand productivity are affected by beech bark disease. We assessed the potential impact of beech bark disease in forest stands with varying beech densities (low, moderate, and high) and infestation of Cryptococcus fagisuga (absent, light, and heavy). Variables were measured in 62 stands throughout the Upper and Lower Peninsulas of Michigan in 2002 and 2003. Regenerating beech stem density did not differ among stands and no current evidence suggests dense beech thickets will regenerate in stands impacted by beech bark disease in Michigan. Beech snags were significantly more abundant in stands with heavy C. fagisuga infestation than in stands where C. fagisuga was absent or infestation was light, suggesting tree mortality from beech bark disease had occurred. Coarse woody debris volume and beech nut mass appeared to be highest in stands with heavy C. fagisuga infestation, although means were not statistically different. Long-term monitoring of these stands will be necessary to document the effects of beech bark disease as it progresses throughout Michigan.
机译：2000年在密歇根州发现了山毛榉树皮病，可能会杀死至少50％的美国成熟山毛榉树。我们的研究旨在收集基准数据，这些数据将使我们在以后的研究中能够确定山毛榉树皮病对林下成分，野生动植物资源和林分生产力的影响。我们评估了山毛榉树皮病在不同密度（低，中和高）和隐球菌侵染（无，轻和重）侵染的林分中的潜在影响。在2002年和2003年，在密歇根州上，下半岛的62个林分中测量了变量。林分之间再生的山毛榉茎密度没有差异，目前没有证据表明在密歇根州的山毛榉树皮病影响的林分中会再生出密集的山毛榉灌丛。比起没有烟曲霉或轻度侵染的山毛榉，在重度Fagisuga大量侵染的林分中，山毛榉枝明显丰富，表明发生了山毛榉树皮病造成的树木死亡。虽然重度无统计学差异，粗重的C. fagisuga侵染的林地中粗木屑的体积和山毛榉坚果的质量似乎最高。对这些林分进行长期监控对于记录整个密歇根州的山毛榉树皮病的影响将是必要的。

著录项

  • 作者

    Kearney, Amy M.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Biology Entomology.; Agriculture Forestry and Wildlife.
  • 学位 M.S.
  • 年度 2006
  • 页码 118 p.
  • 总页数 118
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 昆虫学;森林生物学;
  • 关键词

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