• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >The effects of prescribed burning by the National Park Service on pine-oak forests within Great Smoky Mountains National Park.
【24h】

The effects of prescribed burning by the National Park Service on pine-oak forests within Great Smoky Mountains National Park.

机译：国家公园管理局规定的焚烧措施对大烟山国家公园内的松橡树林产生了影响。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The National Park Service (NPS) at Great Smoky Mountains National Park (GSMNP) has implemented prescribed burning of pine-oak forests in an attempt to restore and maintain this fire-dependent forest type, which is converting to a mesic broadleaf forest after a long period of fire suppression. One goal of the burning is to create suitable habitat for the red-cockaded woodpecker, a federally endangered species that requires a habitat with open stands possessing mature pines. The effects of prescribed burns on two pine-oak forests were measured and evaluated to determine their effectiveness in achieving management goals. Hemispherical photography analysis quantified the impact of burning on available light reaching the forest floor with the global site factor (GSF), the percentage of total above-the-canopy light reaching the forest floor. A site which received a high intensity burn had canopy coverage substantially reduced resulting in more light penetration compared with a site which received a low intensity prescribed burn and unburned control sites. Pine regeneration was abundant only in the forest at the location receiving the high intensity burn. Available light had a significant relationship with the species composition of tree regeneration. Substantial pine regeneration and recruitment into larger size classes was associated with levels of GSF that were 60 percent or greater, providing a novel, empirical criterion for management of this forest type. On the low intensity fire site, hardwood regeneration increased following the fire, indicating that the low intensity fire actually accelerated succession to a more mesic forest type. Future fires in pine-oak forests at GSMNP should be of sufficient intensity to reduce the canopy to the extent that GSF is 60 percent or greater following the burn in order to retain pine-oak forests.
机译：大雾山国家公园（GSMNP）的国家公园管理局（NPS）实施了规定的烧制松橡树森林的尝试，以恢复和维持这种依赖火的森林类型，经过长时间的使用，该森林已转变为中生的阔叶林灭火期。焚烧的目标之一是为红冠啄木鸟创造合适的栖息地。啄木鸟是一种联邦濒危物种，需要一个开放的，拥有成熟松树的栖息地。对规定的烧伤对两个松橡林的影响进行了测量和评估，以确定它们在实现管理目标方面的有效性。半球摄影分析通过全球占位因子（GSF）量化了燃烧对到达森林地面的可用光的影响，即到达森林地面的全部冠层以上光的百分比。与遭受低强度规定烧伤和未燃烧对照部位的地点相比，遭受高强度烧伤的地点的冠层覆盖率大大降低，导致更多的光线穿透。仅在遭受高强度烧伤的森林中，松树的再生丰富。可用光与树木再生的物种组成有显着关系。大量的松树再生和募集成更大的树种与60％或更高的GSF水平相关，为管理这种森林类型提供了新颖的经验标准。在低烈度火灾现场，火灾后阔叶树的再生增加，表明低烈度火灾实际上加速了向更中生森林类型的演替。 GSMNP松树林中的未来大火应具有足够的强度，以将树冠减少到烧毁后GSF为60％或更高的程度，以保留松树林。

著录项

  • 作者

    Bretthauer, Scott M.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Agriculture Forestry and Wildlife.; Environmental Sciences.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 258 p.
  • 总页数 258
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 森林生物学;环境科学基础理论;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号