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Inundation increases wetland soil organic carbon through microbial necromass rather than plant lignin components

文献类型：期刊论文

作者Zhao, Mingliang2,3; Wang, Lianjing2,3; Xiao, Leilei2,3; Song, Weimin2,3; Wang, Xiaojie2,3; Chu, Xiaojing2,3; Zhang, Xiaoshuai2,3; Zhao, Qingyun1,2,3; He, Yangjian2,3; Wei, Siyu2,3
刊名CATENA
出版日期2026-06-01
卷号267页码:15
关键词Inundation depth Soil organic carbon Microbial necromass carbon Plant lignin phenols Wetland
ISSN号0341-8162
DOI10.1016/j.catena.2026.109962
通讯作者Han, Guangxuan(gxhan@yic.ac.cn)
英文摘要Although wetlands are known to be important carbon sinks, the mechanisms governing soil organic carbon (SOC) stabilisation under different hydrological regimes remain unclear. While microbial necromass carbon (MNC) and plant lignin phenols are key components of SOC, the effects of different inundation depths on their relative contributions to SOC remain poorly understood. Here, we conducted a 6-year field experiment in the Yellow River Delta wetland, China, with varying inundation depths (0, 5, 10, 20, 30 and 40 cm). The results revealed that SOC stocks in surface soils (0-20 cm) increased by 38% (4.86 to 6.73 g & sdot;kg-1) with increasing inundation depth, primarily due to enhanced plant productivity and microbial turnover. The contribution of MNC to SOC increased significantly from 14.8% to 23.8%, exceeding increase in lignin phenol content (0.08-0.12 g kg-1) by an order of magnitude (10-16 times). Fungal necromass dominated MNC accumulation and was strongly associated with soil microbial biomass C and Fep + Alp levels. In contrast, lignin phenol dynamics were regulated by abiotic factors (pH and Fep + Alp level), showing no significant SOC contribution shifts. Structural equation modelling indicated that soil microbial activity and mineral associations were the primary drivers of MNC, collectively explaining 88% of its variation. These findings refine the existing understanding of wetland C dynamics, demonstrating that inundation depth increases SOC stocks and preferentially stabilises microbial-derived C through biotic-abiotic interactions. Incorporating hydrological gradients into Earth system models is essential for predicting wetland carbon-climate feedback under intensifying hydrological variability.
WOS关键词ENZYMATIC LATCH ; COMMUNITY
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:001710593000001
资助机构National Key Research and Development Program of China ; Natural Science Foundation of China ; Natural Science Foundation of Shandong ; Young Talent of Lifting engineering for Science and Technology in Shandong, China ; Yellow River Delta Ecological Research Station of Coastal Wetland ; Chinese Academy of Sciences
源URL[http://ir.yic.ac.cn/handle/133337/42240]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者Han, Guangxuan
作者单位1.Liaocheng Univ, Sch Geog & Environm, Liaocheng 252000, Peoples R China
2.Chinese Acad Sci, Yellow River Delta Field Observat & Res Stn Coasta, Dongying 257500, Shandong, Peoples R China
3.Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Zone Environm Proc & Ecol Reme, Yantai 264003, Shandong, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Mingliang,Wang, Lianjing,Xiao, Leilei,et al. Inundation increases wetland soil organic carbon through microbial necromass rather than plant lignin components[J]. CATENA,2026,267:15.
APA Zhao, Mingliang.,Wang, Lianjing.,Xiao, Leilei.,Song, Weimin.,Wang, Xiaojie.,...&Han, Guangxuan.(2026).Inundation increases wetland soil organic carbon through microbial necromass rather than plant lignin components.CATENA,267,15.
MLA Zhao, Mingliang,et al."Inundation increases wetland soil organic carbon through microbial necromass rather than plant lignin components".CATENA 267(2026):15.

入库方式： OAI收割

来源：烟台海岸带研究所

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