Comparison of Soil Organic Matter Transformation Processes in Different Alpine Ecosystems in the Qinghai-Tibet Plateau | |
Chen, Qiuyu1,2; Lei, Tianzhu3; Wu, Yingqin3; Si, Guicai3; Xi, Chuanwu4; Zhang, Gengxin1 | |
刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES |
2019 | |
卷号 | 124期号:1页码:33-45 |
关键词 | alpine ecosystem organic matter transformation microbial community soil density fractionation Py-GC-MS MS |
ISSN号 | 2169-8953 |
DOI | 10.1029/2018JG004599 |
英文摘要 | Soils in the Qinghai-Tibet Plateau are young in terms of development and form a thin, skeletal soil layer because the gravel parent materials are glaciofluvial deposit, eluvium, and fluvial sediment, which are extremely sensitive to global climate change. The lack of understanding of soil organic matter (SOM) transformation processes in this region hinders the prediction of SOM stocks under future climate conditions. In this study, SOM transformation processes were investigated by density groupings and pyrolysis-gas chromatography/tandem-mass spectrometry (Py-GC-MS/MS) in five alpine ecosystems: alpine desert, alpine grassland, alpine meadow, alpine wetland, and alpine forest. The roles of microbial community in different density fractions were elucidated. Soil samples were separated into three fractions with NaI solution: labile fraction (F-L; rho <= 1.6 g/cm(3)), moderate fraction (F-M; 1.6 < rho < 2.25 g/cm(3)), and recalcitrant fraction (F-R; rho >= 2.25 g/cm(3)). The following results were obtained. (1) The ratios of different fractions (F-M/F-L, F-R/F-M, and F-R/F-L) indicated the transformation processes of SOM, and ratios less than 1 represented degradation. The transformation processes were similar in alpine grassland and meadow and were similar in alpine desert, wetland, and forest but differed from each other. (2) Fungi preferred to degrade plant detritus, which mainly affected F-L, whereas bacteria chiefly affected F-M. (3) Precipitation altered vegetation type and soil pH, thus affecting communities and microorganism activities and resulting in the above differences. These findings highlight the importance of understanding the limited transformation processes of SOM in ecosystems to predict the impact of climate change on SOM preservation. |
资助项目 | National Natural Science Foundation of China[41471055] ; Key Research Program of Frontier Sciences of the Chinese Academy of Science[QYZDB-SSW-DQC025] ; Science and Technology Basic Resources Investigation Program of China[2015FY110100] |
WOS关键词 | MICROBIAL COMMUNITY COMPOSITION ; DIFFERENT VEGETATION TYPES ; PYROLYSIS-GC/MS ; ENZYME-ACTIVITIES ; CLIMATE-CHANGE ; CARBON POOLS ; FOREST ; BIOMASS ; TEMPERATURE ; PERMAFROST |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000458728400003 |
资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Science and Technology Basic Resources Investigation Program of China ; Science and Technology Basic Resources Investigation Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Science and Technology Basic Resources Investigation Program of China ; Science and Technology Basic Resources Investigation Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Science and Technology Basic Resources Investigation Program of China ; Science and Technology Basic Resources Investigation Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Key Research Program of Frontier Sciences of the Chinese Academy of Science ; Science and Technology Basic Resources Investigation Program of China ; Science and Technology Basic Resources Investigation Program of China |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/90685] |
专题 | 地质与地球物理研究所_兰州油气中心 |
通讯作者 | Zhang, Gengxin |
作者单位 | 1.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, Inst Tibetan Plateau Res, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Key Lab Petr Resources Res, Inst Geol & Geophys, Lanzhou, Gansu, Peoples R China 4.Univ Michigan, Sch Publ Hlth, Dept Environm Hlth Sci, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Chen, Qiuyu,Lei, Tianzhu,Wu, Yingqin,et al. Comparison of Soil Organic Matter Transformation Processes in Different Alpine Ecosystems in the Qinghai-Tibet Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(1):33-45. |
APA | Chen, Qiuyu,Lei, Tianzhu,Wu, Yingqin,Si, Guicai,Xi, Chuanwu,&Zhang, Gengxin.(2019).Comparison of Soil Organic Matter Transformation Processes in Different Alpine Ecosystems in the Qinghai-Tibet Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(1),33-45. |
MLA | Chen, Qiuyu,et al."Comparison of Soil Organic Matter Transformation Processes in Different Alpine Ecosystems in the Qinghai-Tibet Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.1(2019):33-45. |
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