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Water table-driven divergent patterns and drivers of particulate and mineral-associated organic carbon in alpine peatlands

文献类型：期刊论文

作者Zheng, Han4,6; Liu, Mengjie4,6; Chu, Houkun4; Gaffney, Paul P. J.5; Pan, Junxiao4; Wang, Quan-Cheng4; Li, Yang1; Tian, Dashuan4; Zhang, Ruiyang4; Zhou, Ronglei4,6
刊名CATENA
出版日期2026
卷号262页码:109650
关键词Alpine peatlands Particulate organic carbon Mineral-associated organic carbon Climate change Water table level
ISSN号0341-8162
DOI10.1016/j.catena.2025.109650
产权排序1
文献子类Article
英文摘要Classifying soil organic carbon (SOC) into particulate organic carbon (POC) and mineral-associated organic carbon (MAOC) can enhance the understanding of SOC vulnerability to environmental changes. However, the spatial patterns and drivers of POC and MAOC in peatlands remain poorly documented. Here, we collect topsoil samples (0-20 cm) from 43 representative sites exhibiting varying water table levels across the Zoige Plateau, the world's largest alpine peatland. The mean value of POC and MAOC was 131.71 g kg soil- 1 and 92.75 g kg soil- 1, respectively, with POC dominating the SOC contribution (58.4 %) in alpine peatlands compared to other terrestrial ecosystems. Multiple linear regression and random forest analyses identified SOC, soil total nitrogen, and lignin phenols as primary determinants of POC variation, whereas MAOC variation was mainly explained by SOC, iron-bound carbon, and non-crystalline iron oxides. Spatial predictions based on random forest models indicated that POC stocks (mean: 8.25 kg m- 2) increased from southeast to northwest, whereas MAOC stocks (mean: 5.53 kg m- 2) were higher in southeast on the Zoige Plateau. Rising water tables increased both POC stocks and their contribution to SOC, while declining water tables enhanced the contribution of MAOC stocks to SOC but reduced total SOC stocks. Our findings highlight divergent patterns and drivers of SOC fractions at large scales in alpine peatlands, provide evidence of how water table fluctuations influence their relative contributions to SOC stocks, and offer valuable insights into soil carbon formation and stability in these cold, climate-sensitive peatland ecosystems.
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WOS关键词EXTRACELLULAR ENZYME-ACTIVITY ; NITROGEN
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:001619594200001
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/217729]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Wang, Jinsong
作者单位1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610213, Peoples R China;
2.Southwest Minzu Univ, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu 610041, Peoples R China;
3.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China;
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China;
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
推荐引用方式
GB/T 7714		 Zheng, Han,Liu, Mengjie,Chu, Houkun,et al. Water table-driven divergent patterns and drivers of particulate and mineral-associated organic carbon in alpine peatlands[J]. CATENA,2026,262:109650.
APA Zheng, Han.,Liu, Mengjie.,Chu, Houkun.,Gaffney, Paul P. J..,Pan, Junxiao.,...&Wang, Jinsong.(2026).Water table-driven divergent patterns and drivers of particulate and mineral-associated organic carbon in alpine peatlands.CATENA,262,109650.
MLA Zheng, Han,et al."Water table-driven divergent patterns and drivers of particulate and mineral-associated organic carbon in alpine peatlands".CATENA 262(2026):109650.

入库方式： OAI收割

来源：地理科学与资源研究所

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