Contribution of fungal biomass to persistent soil carbon across natural ecosystems  

作　　者：Xiang WANG Guang-Hui YU Yakov KUZYAKOV Bo-Hao YIN Andreas KAPPLER Cong-Qiang LIU 

机构地区：[1]Bohai Coastal Critical Zone National Observation and Research Station,Institute of Surface-Earth System Science,School of Earth System Science,Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim,Tianjin University,Tianjin 300072,China [2]Department of Soil Science of Temperate Ecosystems,Department of Agricultural Soil Science,University of Göttingen,Göttingen 37077,Germany [3]Agro-Technological Institute,Peoples Friendship University of Russia(RUDN University),Moscow 117198,Russia [4]Geomicrobiology,Center for Applied Geosciences,University of Tübingen,Tübingen 72076,Germany [5]Cluster of Excellence EXC 2124,Controlling Microbes to Fight Infection,University of Tübingen,Tübingen 72076,Germany

出　　处：《Science China Earth Sciences》2025年第2期444-456,共13页中国科学(地球科学英文版)

基　　金：the support by the RUDN University Strategic Academic Leadership Program;infrastructural support by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)under Germany's Excellence Strategy,cluster of Excellence EXC2124,project ID 390838134;supported by the National Natural Science Foundation of China(Grant Nos.U22A20608,42293264&41977271);Tianjin Municipal Science and Technology Bureau(Grant Nos.23ZYJDJC00050&24ZYJDJC00330)。

摘　　要：Fungi are known to be crucial in the formation and stabilization of soil organic matter through their exudates and dead residues(necromass).Yet,it remains unclear how fungi contribute to the persistence of carbon in soils over millennial scales across biomes.Here,this study fills the knowledge gap by linking fungal carbon stocks with minerals-associated carbon stocks across major biomes.A strong correlation between fungal biomass and reactive mineral-associated carbon stocks in soils across six biomes supports the substantial role of fungi in soil carbon persistence at the global level.High spatial resolution nanoscale secondary ion mass spectrometry revealed that fungi may stabilize carbon by forming organo-mineral associations through their close physical connection to reactive minerals and weathered nanoparticles.We propose a conceptual model that emphasizes the dualistic role of hypha-mineral interactions:(i)fungi accelerate organic matter decomposition by producing reactive oxygen species on the hypha-mineral interfaces,and(ii)fungi stabilize their residues on mineral surfaces,leading to millennial scale persistence of soil C.Concluding,fungi play a fundamental role in ecosystems that extends beyond the decomposition of persistent carbon.They are crucial in stabilizing carbon on mineral surfaces,thereby facilitating the long-term removal of carbon from rapid biotic cycling.

关 键 词：BIOGEOGRAPHY FUNGI Mineral-associated organic matter(MAOM) Reactive minerals Soil carbon stability NANOSIMS 

分 类 号：S154.3[农业科学—土壤学] X171.1[农业科学—农业基础科学]