Spatial distribution and influencing factors of humus layer thickness of forest land in permafrost region of Northeast China
Spatial distribution and influencing factors of humus layer thickness of forest land in permafrost region of Northeast China
复制标题
东北多年冻土区林地腐殖质层厚度空间分布及影响因素
DOI：
10.1016/j.catena.2023.106979
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发表时间：
2023-05
期刊：
影响因子：
6.2
通讯作者：
Shuying Zang
中科院分区：
文献类型：
--
作者：
Haoran Man;Xingfeng Dong;Miao Li;Zhichao Zhang;Cuizhen Wang;Shuying Zang
腐殖质对土壤水动态、养分储存和植物生长具有重大影响。研究表明，腐殖质层与气候、土壤性质、地形等环境因素有关。然而，腐殖质层（HLT）的厚度及其空间分布的研究较少。特别是在永久冻土层下的北方山地森林中，环境对 HLT 的影响仍不清楚。本研究以中国东北地区高纬度寒带山地森林流域为研究对象，探讨了环境因素对HLT的影响及其与多年冻土类型的关系。使用地理加权回归克里金法 (GWRK) 模型提取跨流域的 HLT 分布。确定高程、坡度、坡向、年平均地表温度和年平均土壤含水量为HLT的统计显着影响因素。海拔是这片寒冷土地上 HLT 最重要的变量，通过影响地表温度和土壤含水量对 HLT 产生间接影响。地形对地表温度和土壤含水量的影响更为显着。研究区域内三个永久冻土类别的 HLT 范围为 1.1 至 26.7 厘米，随着永久冻土类型的不连续性而减小（连续永久冻土 > 零星永久冻土 > 孤立斑块）。研究结果表明，北部高纬度地区腐殖质发育与多年冻土类型密切相关，气候变暖下多年冻土退化可导致腐殖质层减薄。
Humus has significant impacts on soil water dynamics, nutrient storage and plant growth. Studies have demonstrated that the humus layer is related to climate, soil properties, topography and other environmental factors. However, the thickness of the humus layer (HLT) and its spatial distributions are less investigated. Especially in boreal mountain forests underlain with permafrost, the environmental influences on HLT remain unclear. In a high-latitude watershed of boreal mountain forest in Northeast China, this study explores the effects of the environmental factors on HLT, and its relationships with permafrost types. The HLT distribution across the watershed is extracted using the geographically weighted regression kriging (GWRK) model. The elevation, slope, aspect, mean annual ground surface temperature and mean annual soil water content are determined to be statistically significant influencers factors of HLT. The elevation is the most important variable for HLT in this cold land, with an indirect effect on HLT through impacting ground surface temperature and soil water content. Topography casts more significant impact than ground surface temperature and soil water content. HLT ranges from 1.1 to 26.7 cm across three permafrost classes in the study area, decreasing with the discontinuity of permafrost types (continuous permafrost > sporadic permafrost > isolated patches). The findings suggest that the humus development is closely related to the permafrost type in northern high latitudes, and the permafrost degradation can lead to humus layer thinning under climate warming.
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影响因子：
6.2
作者：
Katalin Anita Zagyvai-Kiss;P. Kalicz;J. Szilágyi;Z. Gribovszki
通讯作者：
Katalin Anita Zagyvai-Kiss;P. Kalicz;J. Szilágyi;Z. Gribovszki
影响因子：
2.5
作者：
G. Broll;H. Brauckmann;M. Overesch;B. Junge;C. Erber;Gerhard Milbert;D. Baize;F. Nachtergaele
通讯作者：
G. Broll;H. Brauckmann;M. Overesch;B. Junge;C. Erber;Gerhard Milbert;D. Baize;F. Nachtergaele
凋落物增加极大增强了中国东北多年冻土区白桦林的土壤呼吸
影响因子：
2.9
作者：
Hong Wei;Xiuling Man
通讯作者：
Xiuling Man
影响因子：
5.2
作者：
S. Yi;M. Woo;M. A. Arain
通讯作者：
S. Yi;M. Woo;M. A. Arain
影响因子：
--
作者：
B. Ghuman;R. Lal
通讯作者：
B. Ghuman;R. Lal