Altitudinal changes in carbon storage of temperate forests on Mt Changbai, Northeast China
Altitudinal changes in carbon storage of temperate forests on Mt Changbai, Northeast China
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DOI：
10.1007/s10265-009-0301-1
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发表时间：
2010-02
影响因子：
2.8
通讯作者：
B. Zhu;Xiangping Wang;Jingyun Fang;S. Piao;Haihua Shen;Shuqing Zhao;C. Peng
中科院分区：
文献类型：
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作者：
B. Zhu;Xiangping Wang;Jingyun Fang;S. Piao;Haihua Shen;Shuqing Zhao;C. Peng
许多研究调查了森林生态系统碳储量的区域和大陆尺度模式;然而，森林生态系统不同组成部分（植被、碎屑和土壤）碳储量的海拔变化仍然知之甚少。在这项研究中，我们测量了沿着海拔700- 2000 m的22个森林样地的植被、碎屑和土壤的碳储量，以量化主要森林生态系统碳储量的海拔变化长白山红松阔叶混交林700-1,100 m，云杉冷杉林1,100-1,800 m，赤桦林1,800-2,000 m。生态系统总碳密度（每公顷碳储量）平均为237 t C ha−1（范围从112到338吨C公顷-1），其中153吨C公顷-1（52-245吨C ha−1）储存在植被生物量中，14吨C ha−1（2.2-48 t C ha−1）在森林碎屑（包括立死树、倒下的树和地面材料）中，70 t C ha−1（35-113 t C ha−1）在土壤有机质中（1 m深度）。在所有森林类型中，岳桦林的植被和总碳密度最低，土壤有机碳（SOC）密度最高，而云杉林和冷杉林的碎屑碳密度最高。3个生态系统组分的碳密度均表现出明显的海拔变化规律：随着海拔的升高，植被碳密度显著降低，碎屑碳密度先升高后降低，有机碳密度呈升高趋势，但不显著。总生态系统C在各组分中的分配呈现出相似但沿着海拔梯度更为显著的变化趋势。研究结果表明，长白山温带森林不同组分间碳储量和分配随森林类型和海拔高度的不同而有很大差异。
A number of studies have investigated regional and continental scale patterns of carbon (C) stocks in forest ecosystems; however, the altitudinal changes in C storage in different components (vegetation, detritus, and soil) of forest ecosystems remain poorly understood. In this study, we measured C stocks of vegetation, detritus, and soil of 22 forest plots along an altitudinal gradient of 700–2,000 m to quantify altitudinal changes in carbon storage of major forest ecosystems (Pinus koraiensisand broadleaf mixed forest, 700–1,100 m;PiceaandAbiesforest, 1,100–1,800 m; andBetula ermaniiforest, 1,800–2,000 m) on Mt Changbai, Northeast China. Total ecosystem C density (carbon stock per hectare) averaged 237 t C ha−1(ranging from 112 to 338 t C ha−1) across all the forest stands, of which 153 t C ha−1(52–245 t C ha−1) was stored in vegetation biomass, 14 t C ha−1(2.2–48 t C ha−1) in forest detritus (including standing dead trees, fallen trees, and floor material), and 70 t C ha−1(35–113 t C ha−1) in soil organic matter (1-m depth). Among all the forest types, the lowest vegetation and total C density but the highest soil organic carbon (SOC) density occurred inBetula ermaniiforest, whereas the highest detritus C density was observed inPiceaandAbiesforest. The C density of the three ecosystem components showed distinct altitudinal patterns: with increasing altitude, vegetation C density decreased significantly, detritus C density first increased and then decreased, and SOC density exhibited increasing but insignificant trends. The allocation of total ecosystem C to each component exhibited similar but more significant trends along the altitudinal gradient. Our results suggest that carbon storage and partitioning among different components in temperate forests on Mt Changbai vary greatly with forest type and altitude.