Pedosphere 34(1): 36--43, 2024
ISSN 1002-0160/CN 32-1315/P
©2024 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Importance of periphytic biofilms for carbon cycling in paddy fields: A review |
Lei ZHOU1,2,3, Yonghong WU1,2,3 , Junzhuo LIU1,2,3, Pengfei SUN1,2,3, Ying XU1,2,3, Jan DOLFING4, Robert G.M. SPENCER5, Erik JEPPESEN6,7,8,9 |
1 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);
2 Zigui Three Gorges Reservoir Ecosystem, Observation and Research Station of Ministry of Water Resources of the People's Republic of China, Yichang 443605 (China);
3 College of Nanjing, University of Chinese Academy of Sciences, Nanjing 211135 (China);
4 Faculty of Energy and Environment, Northumbria University, Newcastle upon Tyne NE1 8QH (UK);
5 Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee FL 32306 (USA);
6 Department of Ecoscience & Centre for Water Technology (WATEC), Aarhus University, Aarhus DK-8000 (Denmark);
7 Sino-Danish Centre for Education and Research, Beijing 100049 (China);
8 Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation (EKOSAM), Middle East Technical University, Ankara 06800 (Turkiye);
9 Institute of Marine Sciences, Middle East Technical University, Mersin 33731 (Turkiye) |
| ABSTRACT |
| Paddy fields play an important role in global carbon (C) cycling and are an important source of methane (CH4) emissions. Insights into the processes influencing the dynamics of soil organic C (SOC) in paddy fields are essential for maintaining global soil C stocks and mitigating climate change. Periphytic biofilms composed of microalgae, bacteria, and other microorganisms are ubiquitous in paddy fields, where they directly mediate the transfer of elements at the soil-water interface. However, their contributions to C turnover and exchange have been largely neglected. Periphytic biofilms affect and participate in soil C dynamics by altering both abiotic (e.g., pH and redox potential) and biotic conditions (e.g., microbial community composition and metabolism). This review summarizes the contributions of periphytic biofilms to soil C cycling processes, including carbon dioxide fixation, SOC mineralization, and CH4 emissions. Future research should be focused on: i) the mechanisms underlying periphytic biofilm-induced C fixation and turnover and ii) quantifying the contributions of periphytic biofilms to soil C uptake, stabilization, and sequestration in paddy fields. |
| Key Words: carbon fixation,carbon mineralization,carbon sequestration,methane emission,microbial aggregates,soil organic carbon |
| Citation: Zhou L, Wu Y H, Liu J Z, Sun P F, Xu Y, Dolfing J, Spencer R G M, Jeppesen E. 2024. Importance of periphytic biofilms for carbon cycling in paddy fields: A review. Pedosphere. 34(1): 36–43. |
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