Seasonal variations in labile soil organic matter fractions in permafrost soils with different vegetation types in the central Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Shang, Wen1,2; Wu, Xiaodong1; Zhao, Lin1; Yue, Guangyang1; Zhao, Yonghua1; Qiao, Yongping1; Li, Yuqiang3 |
| 刊名 | CATENA
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 137页码:670-678 |
| 关键词 | Labile SOM dynamics Seasonal variation Vegetation cover Freeze-thaw cycle Qinghai-Tibet Plateau |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2015.07.012 |
| 通讯作者 | Wu, Xiaodong(wxd565@163.com) |
| 英文摘要 | Labile soil organic matter (SOM) plays a crucial role in nutrient and carbon cycling, particularly in permafrost ecosystems. Understanding its variation is therefore very important. In the present study, we evaluated the seasonal patterns of labile SOM from April 2013 to March 2014 under alpine swamp meadow (ASM), meadow (AM), steppe (AS) and desert (AD) vegetation in permafrost regions of the China's Qinghai-Tibet Plateau. The fractions (0 to 10 cm depth) included dissolved organic carbon (DOC), light-fraction carbon (LFC) and nitrogen (LFN), and microbial biomass carbon (MBC) and nitrogen (MBN). These fractions showed dramatic seasonal patterns in ASM and AM soils, but were relatively stable in AD soil. Soil DOC concentrations in the ASM, AM, and AD soils increased from April to May 2013, then increased again from July to August 2013 and from February to March 2014. The LFC and LFN concentrations in all four vegetation types were higher from June to August 2013. The highest MBC and MBN concentrations in the ASM, AM, and AS soils all occurred in the summer and the ASM soil showed a second peak in October or November 2013. Seasonal changes in climatic factors, vegetation types, and permafrost features were great causes of labile SOM variations in this study. Throughout the entire sampling period, the ASM soil generally had the highest labile SOM, followed by the AM, AS, and AD soils; thus, the ASM soil is the best system conserving soil nutrient (especially labile fractions) and microbial activity. Correlation analysis indicated that these fractions were not related to soil moisture and temperature in AS or AD soils, but soil temperature and moisture were significantly related to MBC and MBN in AM soil and DOC in ASM soil. Thus, the response of the labile SOM fractions in this high-altitude permafrost soils to climate change depended strongly on vegetation types. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | MICROBIAL BIOMASS ; AGRICULTURAL SOILS ; EXTRACTION METHOD ; ENZYME-ACTIVITIES ; LIGHT-FRACTION ; ARCTIC TUNDRA ; CARBON ; DYNAMICS ; NITROGEN ; ALPINE |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000367635800066 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557115 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wu, Xiaodong |
| 作者单位 | 1.Chinese Acad Sci, Cryosphere Res Stn Qinghai Xizang Tibet Plateau, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Naiman Desertificat Res Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shang, Wen,Wu, Xiaodong,Zhao, Lin,et al. Seasonal variations in labile soil organic matter fractions in permafrost soils with different vegetation types in the central Qinghai-Tibet Plateau[J]. CATENA,2016,137:670-678. |
| APA | Shang, Wen.,Wu, Xiaodong.,Zhao, Lin.,Yue, Guangyang.,Zhao, Yonghua.,...&Li, Yuqiang.(2016).Seasonal variations in labile soil organic matter fractions in permafrost soils with different vegetation types in the central Qinghai-Tibet Plateau.CATENA,137,670-678. |
| MLA | Shang, Wen,et al."Seasonal variations in labile soil organic matter fractions in permafrost soils with different vegetation types in the central Qinghai-Tibet Plateau".CATENA 137(2016):670-678. |
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来源：寒区旱区环境与工程研究所
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