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Variation of soil carbon accumulation across a topographic gradient in a humid subtropical mountain forest

文献类型：期刊论文

作者Tian, Qiuxiang2,4; Wang, Dongya1,2; Li, Dong1,2,3; Huang, Lin1,2; Wang, Min1,2; Liao, Chang1,2; Liu, Feng2,4
刊名BIOGEOCHEMISTRY
出版日期2020-06-04
页码18
关键词Topographic position Carbon storage Particulate organic carbon Carbon stability Carbon fractions Chemical association
ISSN号0168-2563
DOI10.1007/s10533-020-00679-2
英文摘要Topography is tightly coupled with soil organic carbon (SOC) cycling in sloping landscapes. However, we know little about the spatial variation of SOC accumulation and persistence along a topographic gradient and the controlling processes. Here, we assessed the spatial variation of SOC and its composition along a topographic gradient in a humid mountain forest. The variables associated with environmental factors, topographical traits, carbon input from plants, and soil physico-chemical properties were analyzed to assess their contributions. Results showed that both SOC and mineral-bound organic carbon (MOC) contents were comparable among the topographic positions (ridge, middle slope, lower slope and valley). However, particulate organic carbon (POC) content decreased significantly from ridge to valley. Our measured environmental variables explained 67%, 74% and 77% of the variations in SOC contents for 0-10 cm, 10-20 cm and 20-40 cm soils, respectively. Soil physico-chemical properties (including pH and soil reactive Fe/Al oxides) were the main driver on SOC and MOC variations. In contrast, the variation in POC was more explained by topographical traits and carbon input. We also observed significantly lower SOC stability for ridge soil than valley soil. The significant topographic patterns for SOC fraction and SOC stability suggested that the soil carbon cycling processes were dependent on landscape positions. Future carbon budget and carbon dynamic researches in the humid sloping landscapes should take into account the topographic effects, especially for the free and light carbon fractions.
资助项目National Natural Science Foundation of China[31400463] ; National Natural Science Foundation of China[31470526] ; National Natural Science Foundation of China[31870465]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
WOS记录号WOS:000537683500001
出版者SPRINGER
源URL[http://202.127.146.157/handle/2RYDP1HH/15308]  
专题中国科学院武汉植物园
通讯作者Liu, Feng
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
3.Tibet Univ, Coll Sci, Lasa 850000, Peoples R China
4.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Qiuxiang,Wang, Dongya,Li, Dong,et al. Variation of soil carbon accumulation across a topographic gradient in a humid subtropical mountain forest[J]. BIOGEOCHEMISTRY,2020:18.
APA Tian, Qiuxiang.,Wang, Dongya.,Li, Dong.,Huang, Lin.,Wang, Min.,...&Liu, Feng.(2020).Variation of soil carbon accumulation across a topographic gradient in a humid subtropical mountain forest.BIOGEOCHEMISTRY,18.
MLA Tian, Qiuxiang,et al."Variation of soil carbon accumulation across a topographic gradient in a humid subtropical mountain forest".BIOGEOCHEMISTRY (2020):18.

入库方式： OAI收割

来源：武汉植物园

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