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首页> 外文学位 >A Comparison of Fire Severity Effects on Post Fire Vegetation Recovery Nine Years Following the Rodeo-Chediski Fire: A Long Term Monitoring Study.
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A Comparison of Fire Severity Effects on Post Fire Vegetation Recovery Nine Years Following the Rodeo-Chediski Fire: A Long Term Monitoring Study.

机译：牛仔竞技-奇迪奇大火后九年火灾严重程度对火灾后植被恢复的影响比较：一项长期监测研究。

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摘要

Two nearly homogenous 60 acre watersheds near Heber, Arizona, within the Apache-Sitgreaves National Forest, were burned at moderate and high severities during the 2002 Rodeo-Chediski wildfire. Each watershed had 30 permanent plots located on it from earlier studies. In 2011, nearly 10 years following the fire, the plots were re-measured to determine how fire severity affects the long term vegetative recovery of this ecosystem; specifically herbaceous production and tree regeneration and density.;Canopy cover, litter depth, herbaceous weight, herbaceous cover and shrub cover are vital indicators of herbaceous production, and were found to be significantly different between the sites. Canopy cover and litter depth were found to be significantly higher on the moderate site while herbaceous weight, herbaceous cover and shrub cover were found to be significantly higher on the high site.;Tree densities of the three present tree species, ponderosa pine, alligator juniper, and gambel oak, were measured and divided into five size classes to distinguish the diversity of the communities. The mean densities for each species and size class were analyzed to determine if there were any statistically significant differences between the sites. Ponderosa pine saplings (regeneration) were found to have no significant differences between the sites. Juniper and oak saplings were found to be significantly higher on the high site. The remaining four ponderosa pine size classes were found to be significantly higher on the moderate site while the remaining four size classes for juniper and oak were found to have no statistical differences between the sites.;Further analysis of the tree proportions revealed that the ponderosa pine species was significantly higher on the moderate site while juniper and oak were significantly higher on the high site. Species specific proportion analysis showed that the ponderosa pine size classes were significantly different across the sites while the juniper and oak size classes showed no significant differences between the sites. Within the ponderosa pine size classes, saplings were found to be significantly higher on the high site while the remaining four classes were significantly higher on the moderate site.
机译：在2002年Rodeo-Chediski野火期间，亚利桑那州希伯附近的Apache-Sitgreaves国家森林内的两个近乎均匀的60英亩小流域被烧成中等强度和高强度。每个分水岭上都有来自早期研究的30个永久性地块。在大火发生后近十年的2011年，对这些土地进行了重新测量，以确定大火的严重程度如何影响该生态系统的长期营养恢复；尤其是草本植物的生产以及树木的再生和密度。盖层，凋落物深度，草本重量，草本盖度和灌木盖度是草本植物生产的重要指标，并且发现这些部位之间存在显着差异。中度部位的冠层覆盖度和凋落物深度显着较高，而高地部位的草重，草本覆盖度和灌木覆盖度则显着更高。现有的三种树种，黄松，短吻鳄的树木密度和gambel橡木被测量并分为五个大小等级，以区分社区的多样性。分析每种物种和大小类别的平均密度，以确定位点之间是否有任何统计学上的显着差异。黄松树苗（再生）在两个部位之间没有显着差异。在高处发现杜松和橡树苗明显更高。在中度部位发现其余四个美国黄松的大小等级显着较高，而在杜松和橡树中其余四个大小等级在两个部位之间没有统计学差异。;进一步分析树木比例表明，美国黄松中度站点的树种明显更高，而杜松和橡树在高站点的树种则更高。物种特异性比例分析表明，黄松松的大小等级在两个地点之间存在显着差异，而杜松和橡树的大小等级在两个地点之间没有显着差异。在美国黄松的大小等级中，幼树在高处被发现明显较高，而其余四类在中部被显着增加。

著录项

  • 作者

    Neeley, Heidi L.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Biology Botany.;Agriculture Forestry and Wildlife.;Environmental Sciences.
  • 学位 M.S.
  • 年度 2012
  • 页码 73 p.
  • 总页数 73
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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