首页> 外文学位 >Classifying the Fire Regime Condition Class for upland oak-hickory forests of the Shawnee National Forest.
【24h】

Classifying the Fire Regime Condition Class for upland oak-hickory forests of the Shawnee National Forest.

机译:为肖尼国家森林的山地橡树山林森林分配防火制度条件等级。

获取原文
获取原文并翻译 | 示例

摘要

Several reports of widespread establishment of mesophytic vegetation within oak-hickory upland forests have been documented throughout the Central Hardwoods Region. Previous studies suggest deviations from historic disturbance regimes may be a primary driver of vegetation change, necessitating the use of Fire Regime Condition Class (FRCC) guidelines to measure changes in forest structure. Current parameters of forest structure and fuel loading were assessed within mature oak-hickory uplands throughout the ecological subsections of the Shawnee National Forest, including the Greater Shawnee Hills, Lesser Shawnee Hills, Cretaceous Hills, and the Illinois Ozarks. Present species importance values and forest structure were compared with reference conditions developed from General Land Office records (Fralish et al. 2002). Current uplands contained an average 214.72 +/- 16.52 trees/ac and 103.37 +/- 2.16 ft 2 BA/ac, while reference stands harbored less than 90 trees/ac with a range of 16 and 120 ft2 BA/ac. Due to the high levels of fragmentation and a lack of large contiguous upland stands within the Shawnee National Forest, stand level criteria for FRCC values were developed as opposed to landscape level FRCC values which are commonly used. FRCC values determined during initial surveys were compared with plot level ratios of forest structure parameters regarding oaks:mesophytes and xerophytes:mesophytes, yielding clear relationships between species composition and FRCC values. Fuel loading (tons/ac) was assessed as a determinant of FRCC values, however a significant relationship between FRCC values and fuel loading was not discovered. Since widespread deviations from the historic fire regime have taken place since the early 20th century, Fire Regime Condition Class values were found to fall into the FRCC 2 and 3 categories without any stands representing FRCC 1. This determination requires future management practices to follow Fire Regime Condition Class guidelines. The study proved that mesophytic species have become established within all canopy strata, with a strong probability of gaining future dominance without active forest management. Although it is clear that forest structure has deviated from reference conditions, a strong oak-hickory overstory component found throughout the study area provides a potential resource to sustain future oak-hickory upland ecosystems.
机译:在整个中部硬木地区,已有几篇关于在橡木山核桃林地中广泛建立中生植物的报道。先前的研究表明,与历史干扰制度的偏离可能是植被变化的主要驱动力,因此有必要使用《火灾状况条件等级》(FRCC)指南来衡量森林结构的变化。在整个肖尼国家森林生态区,包括大肖尼山,小肖尼山,白垩纪山和伊利诺伊州奥扎克斯山地,在成熟的橡木山地高地内评估了森林结构和燃料负荷的当前参数。将目前的物种重要性值和森林结构与根据国家土地局的记录制定的参考条件进行比较(Fralish等,2002)。当前的高地平均包含214.72 +/- 16.52英亩/英亩和103.37 +/- 2.16 ft 2英亩/英亩,而参考林地少于90棵/英亩,范围为16和120 ft2 BA / ac。由于肖尼国家森林中的高碎片化程度和缺乏大量连续的高地林分,因此制定了林分FRCC值的标准,而不是通常使用的景观水平FRCC值。将初始调查期间确定的FRCC值与关于橡树:中生石和旱生植物:中生石的森林结构参数的地积比率进行比较,从而得出物种组成与FRCC值之间的明确关系。燃料负荷(吨/ ac)被评估为FRCC值的决定因素,但是并未发现FRCC值与燃料负荷之间的显着关系。由于自20世纪初期以来就发生了与历史性火灾制度的大范围偏离,因此发现火灾状况条件等级值属于FRCC 2和3类,而没有任何代表FRCC 1的立场。此确定要求未来的管理实践遵循火灾状况条件类准则。研究证明,在所有冠层中均已建立了中生物种,而没有积极的森林管理就很有可能获得未来的统治地位。尽管很明显森林结构已经偏离了参考条件,但是在整个研究区发现的强烈的山核桃木树丛成分提供了维持未来山核桃木树丛高地生态系统的潜在资源。

著录项

  • 作者

    Tikusis, Paul.;

  • 作者单位

    Southern Illinois University at Carbondale.;

  • 授予单位 Southern Illinois University at Carbondale.;
  • 学科 Biology Ecology.;Agriculture Forestry and Wildlife.;Natural Resource Management.
  • 学位 M.S.
  • 年度 2009
  • 页码 145 p.
  • 总页数 145
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学(生物生态学);森林生物学;
  • 关键词

  • 入库时间 2022-08-17 11:37:38

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