A precise, unified method for estimating carbon storage in cool-temperate deciduous forest ecosystems
A precise, unified method for estimating carbon storage in cool-temperate deciduous forest ecosystems
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DOI：
10.1016/j.agrformet.2005.08.014
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发表时间：
2005-11
影响因子：
6.2
通讯作者：
S. Jia;T. Akiyama
中科院分区：
文献类型：
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作者：
S. Jia;T. Akiyama
在研究森林生态系统在全球变暖中的作用时，准确估计森林生态系统中碳的储存和空间分布至关重要。因此需要适当的方法和可靠的数据。在这项研究中，我们开发了一种精确、统一的估计方法，并评估了日本中部冷温带落叶森林生态系统碳储存的七个组成部分。该方法以森林生态系统碳库的详细划分为基础，对划分后的各个碳成分分别采用精确、适宜的方法进行统一、系统的调查和估算。使用的数据和方法包括树木普查和胸径（DBH）-树木生物量之间的异速生长法、使用手持式光谱辐射计测量地面植被（Sasa）的光谱反射率测量、立枯树普查（胸径和树高）以及胸径-生物量与几何计算之间的异速生长法、枯枝落叶和粗木本碎片的详细干重调查、使用剖面挖掘和剖面采样器测量的详细土壤剖面调查。生态系统的总碳储量为440.6tCha−1。在地上质量中，71.4tCha−1 储存在活树中，5.3t 储存在直立的死树中，2.8t 储存在 Sasa Senanensis（林下植被）中。在地下质量中，19.6tCha−1 储存在活根中，1.8t 储存在直立死树的根部中，15.3t 储存在植物凋落物中，6.1t 储存在粗木质碎片中，318.3t 储存在矿质土壤中。整个生态系统中碳的储存不均匀，储存量随地形的变化而变化。储存碳的最小和最大量分别为125.1和726.9tCha−1；最高和最低含量分别出现在山谷（平均 556.7tCha−1）和朝西的斜坡（平均 381.3tCha−1）。与其他生态系统相比，该森林生态系统土壤碳储量较高，植被碳储量较低。结果还证明了土壤中砾石和石头以及标准化土壤采样深度的重要性。
Accurate estimation of the storage and spatial distribution of carbon in forest ecosystems is essential when studying the role of these ecosystems in global warming. Appropriate methods and reliable data are thus necessary. In this study, we developed a precise, unifying estimation method and assessed seven components of carbon storage in a cool-temperate deciduous forest ecosystem in central Japan. This method is based on detailed dividing of carbon pools in forest ecosystem, unifying, and systemic survey and estimate for each divided carbon component using precise and suitable methods, respectively. Data and methods used include tree census and allometry method between diameter at breast height (DBH)–biomass for tree, spectral reflectance measurement using a handy-type spectroradiometer for floor vegetation (Sasa), standing dead tree census (diameter at breast height and tree height) and allometry method between DBH–biomass and geometric calculation, detailed dry weight surveys for litter and coarse woody debris, detailed soil profile survey using profile digging and profile sampler measurement. The total carbon storage in the ecosystem equaled 440.6tCha−1. Of the aboveground mass, 71.4tCha−1was stored in living trees, 5.3t in standing dead trees, and 2.8t in Sasa senanensis (the understory vegetation). Of the belowground mass, 19.6tCha−1was stored in living roots, 1.8t in the roots of the standing dead tree, 15.3t in plant litter, 6.1t in coarse woody debris, and 318.3t in the mineral soil. Carbon was stored unevenly throughout the ecosystem, and storage varied as a function of topography. The minimum and maximum amounts of stored carbon were 125.1 and 726.9tCha−1, respectively; the highest and lowest amounts were found in a valley (average, 556.7tCha−1) and on a west-facing slope (average, 381.3tCha−1), respectively. Compared with other ecosystems, carbon storage in this forest ecosystem was higher in the soil and lower in the vegetation. The results also demonstrate the importance of gravels and stones in the soil and of standardizing the soil sampling depth.