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Ecological and economic impacts of wildfires on an Appalachian oak forest in southern West Virginia.

机译:野火对西维吉尼亚州南部的阿巴拉契亚橡树林的生态和经济影响。

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摘要

Oaks (Quercus spp.) are considered a fire adapted species and fire disturbances throughout the lifecycle have been proposed to be necessary for maintaining oak dominated stands. Wildfire has been blamed for significant losses in sawtimber volume. A total of 164 points were sampled in stands that had experienced between zero to six wildfires over 36 years in Cabwaylingo State Forest (CSF), West Virginia. The wildfires have affected different strata and species of forest vegetation in different ways. While total overstory density decreased from 242 to 38 TPA with increasing fire frequency, oak density was highest in areas of three fires. Although overall basal area decreased from 171 to 52 ft2/ac, oak basal area remained fairly constant at around 60 ft2/ac. Oaks in smaller (< 8 inches) DBH classes were most abundant in areas of two to four wildfires. Total density of sapling sized stems increased with heightened fire occurrence. Oak saplings were significantly highest in density in areas of four fires. Neither oak nor non-oak seedling densities showed significantly differences by fire occurrences. Aggregate oak seedling height, however, was highest in areas that had burned four times. A regeneration assessment method by Steiner et al. (2008) revealed that expected oak stocking 30 years after complete harvest would be 73% in areas of three burns, decreasing with lower or higher fire occurrences. Our results indicate that oak advance reproduction is most competitive over non-oak species in those areas of CSF that have experienced two to four wildfires. Sawtimber volume loss due to cull increased from 181 to 752 Bdft/ac in areas experiencing from zero to six fire occurrences. Total net volume and net dollar value declined with increasing fire frequency ranging from 10,924 to 4,906 Bdft/ac and
机译:橡树(Quercus spp。)被认为是适合火种的物种,并且在整个生命周期中,都提出了对火种的干扰对于维持以橡树为主的林分是必要的。人们将野火归咎于锯材产量的重大损失。在西维吉尼亚州Cabwaylingo州森林(CSF),在36年中经历零到六次野火的林分中,总共采样了164点。野火以不同方式影响了不同的地层和森林植被物种。随着火灾频率的增加,总的层积密度从242 TPA降低到38 TPA,但橡木密度在三场大火中最高。尽管整个基础面积从171降至52平方英尺/英亩,但橡木的基础面积仍相当稳定,约为60平方英尺/英亩。 DBH级别较小(小于8英寸)的橡树在两到四场野火的区域中数量最多。幼树大小的茎的总密度随火势的增加而增加。在四场大火中,橡木树苗的密度最高。橡树和非橡树的幼苗密度均未因火灾发生而显示出显着差异。然而,在燃烧四次的地区,橡树幼苗的总高度最高。 Steiner等人的再生评估方法。 (2008年)揭示,在完全燃烧后30年内,预计三倍燃烧的橡木储量将为73%,随着火灾次数的增加或降低而减少。我们的结果表明,在经历了2到4次野火的CSF地区,橡木的超前繁殖比非橡木更具竞争优势。在发生0到6起火灾的地区,由于剔除造成的锯材体积损失从181 Bdft / ac增加到752 Bdft / ac。随着火灾频率的增加,总净体积和净美元价值从10,924降至4,906 Bdft / ac,

著录项

  • 作者

    Wood, Katharina U. Mueller.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Biology, Botany.Economics, Agricultural.Agriculture, Forestry and Wildlife.Biology, Ecology.
  • 学位 M.S.
  • 年度 2010
  • 页码 52 p.
  • 总页数 52
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 ;
  • 原文服务方 国家工程技术数字图书馆
  • 关键词

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