Microbial community structure and function potential of biological soil crusts in the Mu Us Desert,northern China
Microbial community structure and function potential of biological soil crusts in the Mu Us Desert,northern China
Aims This study assessed microbial community structure and functional potential in different biological soil crusts(BSCs)involved in key biogeochemical processes(C and N cycling)in desert ecosystems. Methods Changes in microbial composition and function gene abundance in three BSCs(algal,lichen,and moss crusts)were assessed using shotgun metagenome sequencing to explore whether different BSCs exhibited different microbial community structures,and C and N metabolic potential. Results The microbial community and functional structure differed significantly among the three BSCs;differences were largely driven by soil organic carbon and total nitrogen.The different relative abundance of genes involved in both C and N cycling promoted different microbial metabolic potential in BSCs.The C and N input process genes in lichen crusts were higher than algal crusts and moss crusts;The C degradation genes(both labile and recalcitrant C)and N loss genes(nitrification and denitrification)were higher in moss crusts.Conclusions Microbial community structure and microbial function structure changed in different BSCs types.In addition,lichen crusts possessed higher C and N fixation potential and moss crusts owed higher C metabolic and N loss potential,which could result in positive soil nutrient feedback and improve BSCs development.
Wei Feng;Yuqing Zhang;Zhen Liu;Yanfei Sun;Shugao Qin;Henan Mao;
Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China##Key Laboratory of State Forestry Administration on Soil and Water Conservation,Beijing Forestry University,Beijing,100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China##Key Laboratory of State Forestry Administration on Soil and Water Conservation,Beijing Forestry University,Beijing,100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China##Engineering Research Center of Forestry Ecological Engineering,Beijing Forestry University,Ministry of Education,Beijing 100083,China;Yanchi Research Station,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;
Biological soil crusts Microbial community structure Microbial function structure Carbon cycling nitrogen cycling Shotgun metagenome sequencing
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