Nitrogen transformation processes in soil along a High Arctic tundra transect

作     者：GUO Mengjie WANG Qing ZHANG Wanying JIAO Yi SUN Bowen HOU Lijun ZHU Renbin GUO Mengjie;WANG Qing;ZHANG Wanying;JIAO Yi;SUN Bowen;HOU Lijun;ZHU Renbin

作者机构：Institute of Polar Environment&Anhui Province Key Laboratory of Polar Environment and Global ChangeSchool of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of NBC Protection for CivilianBeijing 102205China Terrestrial Ecology SectionDepartment of BiologyCopenhagen UniversityCopenhagenØDK-2100Denmark State Key Laboratory of Estuarine and Coastal ResearchEast China Normal UniversityShanghai 200241China 

出 版 物：《Advances in Polar Science》 (极地科学进展（英文版）)

年 卷 期：2023年第34卷第2期

页      面：105-124页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：This study was funded by the National Key Research and Development Program of China(Grant no.2020YFA0608501) the National Natural Science Foundation of China(Grant no.41976220) the State Key Laboratory of NBC Protection of Civilians(Grant no.SKLNBC2020-10) 

主　　题：Arctic tundra soil nitrogen transformation nitrification denitrification functional gene abundance ammonia-oxidizing archaea 

摘      要：Soil nitrogen(N)transformation processes in the High Arctic tundra are poorly understood even though nitrogen is one of the main limiting *** analyzed soil samples collected along a High Arctic tundra transect to investigate spatial variability in key nitrogen transformation processes,functional gene abundances,ammonia-oxidizing archaea(AOA)community structures,and key nitrogen transformation *** potential denitrification rates were higher than the nitrification rates in the soil samples,although nitrification may still regulate N2O emissions from tundra *** nutrient(total carbon,total organic carbon,total nitrogen,and NH_(4)^(+)-N)contents were important determinants of spatial variability in the potential denitrification rates of soil along the tundra *** total sulfurcontent was the main variable controlling potential nitrification processes,probably in association with sulfate-reducing *** nitrate content was the main variable affecting potential dissimilatory nitrate reduction to *** and ammonia-oxidizing bacteria amoA,nirS,and anammox 16S rRNA genes were found in all of the soil *** play more important roles than ammonia-oxidizing bacteria in *** bacteria may utilize NO_(2)^(-)produced through *** analysis indicated that the AOA amoA sequences could be grouped into eight unique operational taxonomic units(OTUs)with a 97%sequence similarity and were affiliated with three group 1.1b *** results indicated that heterogeneous environmental factors(e.g.,the carbon and nitrogen contents of soil)along the High Arctic tundra transect strongly affected the nitrogen transformation rate and relevant functional gene abundances in soil.