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.
基金项目
国家自然科学基金(41825021)
国家自然科学基金(42207447)
国家重点研发计划(2021YFD17008)
江苏省自然科学基金(BK20220004)
中国博士后科学基金(BX2021325)
中国博士后科学基金(2022M723242)
State Key Laboratory of Lake Science and Environment Foundation,China(2022SKL008)
TUBITAK program BIDEB2232 of Türkiye(118C250)
维普
万方数据