Regional variation in forest harvest regimes in the northeastern United States
Regional variation in forest harvest regimes in the northeastern United States
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DOI：
10.1890/12-0180.1
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发表时间：
2013-04-01
影响因子：
5
通讯作者：
Buchholz, Thomas
中科院分区：
文献类型：
--
作者：
Canham, Charles D.;Rogers, Nicole;Buchholz, Thomas
伐木是美国东北部森林成年树死亡的一个更大的原因，比所有其他死亡原因的总和还要大。我们使用森林调查和分析(FIA)数据来建立统计模型，以量化区域森林总采伐制度的三个不同方面：(1)作为地上树木总生物量的函数的样地被砍伐的年度概率，(2)如果样地被砍伐的成年树断面积被移除的比例，以及(3)作为在样地水平上被移除的断面积的百分比、树种及其大小的函数的样地内的一棵树被移除的概率。结果表明，采伐以相对频繁的部分采伐为主，但不同地区、不同森林类型间差异较大。采伐制度与自然干扰制度在空间和时间上的动态死亡率有相似之处，可预测地随着林分结构以及树种和大小的变化而变化。
Logging is a larger cause of adult tree mortality in northeastern U.S. forests than all other causes of mortality combined. We used Forest Inventory and Analysis (FIA) data to develop statistical models to quantify three different aspects of aggregate regional forest harvest regimes: (1) the annual probability that a plot is logged, as a function of total aboveground tree biomass, (2) the fraction of adult tree basal area removed if a plot was logged, and (3) the probability that an individual tree within a plot was removed, as a function of the fraction of basal area removed at the plot level, the species of tree, and its size. Results confirm that relatively frequent partial harvesting dominates the logging regimes, but with significant variation among different parts of the region and different forest types. The harvest regimes have similarities with natural disturbance regimes in imposing spatially and temporally dynamic mortality that varies predictably as a function of stand structure as well as tree species and size.