SOIL CARBON DYNAMICS ACROSS A WINDTHROW DISTURBANCE SEQUENCE IN SOUTHEAST ALASKA
SOIL CARBON DYNAMICS ACROSS A WINDTHROW DISTURBANCE SEQUENCE IN SOUTHEAST ALASKA
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阿拉斯加东南部风尘扰动序列的土壤碳动态
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
R. Sletten
中科院分区：
文献类型：
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作者：
M. Kramer;P. Sollins;R. Sletten
很少有研究考察自然干扰对土壤有机质的形成、稳定和流失的影响。在浅层(<；1米)山地森林土壤中，抛风活动可能导致矿物和有机土层向下到基岩的重新分布和混合。我们研究了阿拉斯加东南部山区温带雨林沿风吹扰动序列的小流域土壤碳的格局，土壤有机质的主要成分。我们的目标是(1)评估抛风和抛光对土壤有机碳在矿物层中积累的影响；(2)比较土壤有机质积累的形式。描述了土壤，并测量了主要有机层和矿物层的厚度，沿三个流域的横断面每隔5米测量一次，风速历史形成了对比。随机选择土壤描述站点的一个子集，然后采样以确定数量和数量。
Few studies have examined the influence of natural disturbances, such as windthrow, on soil organic matter formation, stabilization, and loss in soils. In shallow (<1 m) mountain forest soils, windthrow activity may result in the redistribution and mixing of mineral and organic soil horizons down to bedrock. We studied the patterns of soil carbon, the dominant constituent of soil organic matter, in watersheds along a windthrow disturbance sequence in a mountainous temperate rain forest in southeast Alaska. Our objectives were (1) to evaluate the influence of windthrow and illuviation on the accumulation of soil organic carbon in mineral horizons and (2) to compare the forms of soil organic matter that have accumulated. Soils were described, and the thickness of the major organic and mineral horizons was measured, every 5 m along transects in three watersheds with contrasting windthrow histories. A subset of the soil description sites was randomly selected and then sampled to determine the quantity and qua...