Fire history and the establishment of oaks and maples in second-growth forests
Fire history and the establishment of oaks and maples in second-growth forests
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DOI：
10.1139/x07-216
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发表时间：
2008-05-01
影响因子：
2.2
通讯作者：
Sutherland, Elaine Kennedy
中科院分区：
文献类型：
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作者：
Hutchinson, Todd F.;Long, Robert P.;Sutherland, Elaine Kennedy
我们用树木年代学来研究过去火灾对橡树和枫树建立的影响。六个研究单位位于俄亥俄州南部，1923年开始有组织的消防控制。在2000年林分间伐后，我们收集了橡树（n = 137）和枫树（n = 204）伐桩的基部横截面。每个单位的火灾历史是从橡树发展而来的，橡树和枫树的建立与火灾历史有关。从1870年到1933年，共记录了26起火灾;此后，只有两起火灾被确认。威布尔中位数火灾返回间隔范围从9.1至11.3年的期间结束1935年;平均火灾发生概率（年/火灾）为同一时期的范围从11.6至30.7年。在单位之间，立场开始约。1845年至1900年，几乎没有橡树招聘记录后，1925年。大多数枫树在火灾停止后建立。在几个单位，最后一次重大火灾后立即由一个大脉冲的枫树建立和橡树招聘的停止，表明火灾停止和从橡树到枫树建立的转变之间的直接关系。
We used dendrochronology to examine the influence of past fires on oak and maple establishment. Six study units were located in southern Ohio, where organized fire control began in 1923. After stand thinning in 2000, we collected basal cross sections from cut stumps of oak (n = 137) and maple (n = 204). The fire history of each unit was developed from the oaks, and both oak and maple establishment were examined in relation to fire history. Twenty-six fires were documented from 1870 to 1933; thereafter, only two fires were identified. Weibull median fire-return intervals ranged from 9.1 to 11.3 years for the period ending 1935; mean fire occurrence probabilities (years/fires) for the same period ranged from 11.6 to 30.7 years. Among units, stand initiation began ca. 1845 to 1900, and virtually no oak recruitment was recorded after 1925. Most maples established after the cessation of fires. In several units, the last significant fire was followed immediately by a large pulse of maple establishment and the cessation of oak recruitment, indicating a direct relationship between fire cessation and a shift from oak to maple establishment.