• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fire Ecology >Historic Fire Regime of an Upland Oak Forest in South-Central North America
【24h】

Historic Fire Regime of an Upland Oak Forest in South-Central North America

机译：北美中南部的山地橡树林的历史防火制度

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Prescribed burning is used in upland oak forests of south-central North America to improve wildlife habitat, reduce fire hazard, restore ecosystem integrity, and maintain biological diversity. However, little is known about the frequency, seasonality, and ignition source of historic fires that shaped these forests. In general, it is believed that fire frequency in upland oak forests of south-central North America was influenced by climate and humans, and decreased since Euro-American settlement; yet there is a dearth of scientific evidence to support this conclusion. The objective of this study was to link the fire history of an upland oak forest in east-central Oklahoma with factors controlling the fire regime. We removed cross-sections from 69 dead post oak (Quercus stellata Wangenh.) trees in a 1 km2 area of old-growth post oak and blackjack oak (Q. marilandica Münchh.) forest, and determined the tree-ring record and exact dates of fire scars from 1750 to 2005, using standard dendrochronological methods. An increase in fire from the eighteenth to early twenty-first centuries appeared to be associated with changes in human occupation, and there was little evidence linking the frequency, severity, or extent of fires to climate factors including drought, lightning, and late-spring frosts. These findings appeared to contradict the belief that fire decreased from the eighteenth to early twenty-first centuries and appeared to emphasize the importance of anthropogenic ignition to the local fire regime.
机译：在北美中南部的山地橡树林中使用规定的燃烧方法来改善野生动植物的栖息地，减少火灾危险，恢复生态系统的完整性并维持生物多样性。然而，人们对形成这些森林的历史性火灾的发生频率，季节和起火源知之甚少。一般认为，北美中南部山地橡树林的着火频率受到气候和人类的影响，并且自欧美定居以来就降低了。然而，缺乏科学证据支持这一结论。这项研究的目的是将俄克拉荷马州中东部的高地橡树林的火灾历史与控制火灾的因素联系起来。我们从1平方公里的老树栎和二十一点栎树（Q. marilandicaMünchh。）森林中的69棵死树栎（Quercus stellata Wangenh。）树木中删除了横截面，并确定了树轮记录和确切日期使用标准树木年代学方法对1750年至2005年的火疤进行了分析。从18世纪到21世纪初，大火的增加似乎与人类职业的变化有关，而且几乎没有证据将大火的发生频率，严重程度或程度与气候因素（包括干旱，闪电和晚春）联系起来霜。这些发现似乎与人们认为火势从18世纪减少到21世纪初期的说法相矛盾，并且似乎强调了人为点火对当地火情的重要性。

著录项

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