Amount of downed woody debris and its prediction using stand characteristics in boreal and mixedwood forests of Ontario, Canada
Amount of downed woody debris and its prediction using stand characteristics in boreal and mixedwood forests of Ontario, Canada
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加拿大安大略省北方林和混交林中倒下的木质残骸量及其林分特征预测
DOI：
10.1139/x08-067
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发表时间：
2008
影响因子：
2.2
通讯作者：
Jiaxin Chen
中科院分区：
文献类型：
--
作者：
M. Ter‐Mikaelian;S. Colombo;Jiaxin Chen
我们分析了安大略省北方和混交林的435块永久样地的被砍伐的木质碎屑(DWD)数据，寻求经验关系来根据林分属性来预测DWD的数量。在每个永久样地中，沿三个样带收集数据，包括与样带交点处直径大于或等于7.5 cm的DWD块的直径、树种和分解程度。样地含水率变化范围为0.70~402.7 t·ha-1和0.1~103.4 t·ha-1。针叶林平均含水率为65.4t·ha-1和15.9t·ha-1，阔叶木为主的样地为61.9t·ha-1和16.5t·ha-1。我们的分析表明，干重与林分年龄、立地指数或以黑云杉(Picea Mariana(Mill.)BSP)、东部白松(Pinus strobus L.)、糖枫(Acer charcharum Marsh.)和红栎树(Quercus rubra L.)以樟子松(Pinus bansiana Lamb.)、红松(Pinus bansiana Lamb.)、红松(Pinus.
We analyzed data on downed woody debris (DWD) from 435 permanent sample plots in boreal and mixedwood forests of Ontario seeking empirical relationships to predict DWD quantity from stand attributes. In each permanent sample plot, data were collected along three transects, including diameter, tree species, and degree of decomposition of DWD pieces with diameter greater than or equal to 7.5 cm at the point of intersection with the transect. Amounts of DWD in sample plots ranged from 0.7 to 402.7 m3·ha–1 and from 0.1 to 103.4 t·ha–1. Mean DWD values were 65.4 m3·ha–1 and 15.9 t·ha–1 in softwood- and 61.9 m3·ha–1 and 16.5 t·ha–1 in hardwood-dominated plots. Our analysis revealed no relationship between DWD and stand age, site index, or stocking for plots dominated by black spruce (Picea mariana (Mill.) BSP), eastern white pine (Pinus strobus L.), sugar maple (Acer saccharum Marsh.), and red oak (Quercus rubra L.) and weak relationships for plots dominated by jack pine (Pinus banksiana Lamb.), red pine (Pinus...