Stimulation of methane production potential and alteration in community composition of methanogens following conversion of China's coastal marshes to paddy fields

被引:4
作者
Yao, Xiaochen [1 ]
Wang, Weiqi [2 ]
Yang, Yuling [1 ]
Yang, Wangting [1 ]
Hu, Qinan [1 ]
Jin, Jinghao [1 ]
Liu, Jiaqi [1 ]
Wang, Yuchao [1 ]
Shen, Lidong [1 ]
机构
[1] Nanjing Univ Informat Sci & Technol, Sch Ecol & Appl Meteorol, Key Lab Ecosyst Carbon Source & Sink, China Meteorol Adm ECSS CMA, Nanjing 210044, Peoples R China
[2] Fujian Normal Univ, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou 350117, Peoples R China
关键词
Land conversion; Coastal marshes; Paddy fields; Methane production; Community of methanogenic archaea; MICROBIAL COMMUNITIES; RICE; EMISSIONS; SOIL; RECLAMATION; ARCHAEA; TEMPERATURE; ECOSYSTEMS; BACTERIA;
D O I
10.1016/j.catena.2024.108428
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Conversion of coastal marshes to paddy fields can significantly affect methane (CH4) emissions. However, how such land conversion impacts methanogenesis, a key microbial process regulating CH4 emissions, is poorly known. This investigation adopted a space-for-time substitution method to compare soil methane production potential (MPP), abundance and community composition of methanogenic archaea between marsh land (covered by Kandelia candek, Phragmites australis, or Bruguiera sexangula) and nearby paddy fields in six different regions along the coast of China. Linear mixed-effects models showed that the conversion of salt marshes to paddy fields resulted in significant increases in overall MPP and abundance of methanogenic archaea by 343 % and 346 % in average, respectively. A significant variation in the community composition of methanogenic archaea was observed between marsh land and paddy fields, with the dominant genera shifting from Methanolobus (32.1 %) and Methanosarcina (27.3 %) to Methanobacterium (49.0 %). Partial least squares path model showed that the change of MPP was primarily driven by abundance of methanogenic archaea, and the abundance was affected by alterations in soil physicochemical properties (e.g., organic carbon content, NH4+ content, and salinity) and community composition of methanogenic archaea caused by land conversion. Moreover, both MPP and abundance of methanogenic archaea were significantly correlated with the conversion years. Collectively, this study was the first to show the dynamic response of MPP and community of methanogenic archaea to the conversion of coastal marshes to paddy fields, thereby enhancing our understanding of land conversion's impact on CH4 cycling and the underlying mechanism.
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页数:11
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