Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.soilbio.2018.09.034 |
Desert and steppe soils exhibit lower autotrophic microbial abundance but higher atmospheric CO2 fixation capacity than meadow soils | |
Zhao, Kang1,2,3; Kong, Weidong1,2; Wang, Fei1,2; Long, Xi-En4; Guo, Chunyan1,2; Yue, Linyan1,2; Yao, Huaiying4,5; Dong, Xiaobin6 | |
通讯作者 | Kong, Weidong |
来源期刊 | SOIL BIOLOGY & BIOCHEMISTRY
![]() |
ISSN | 0038-0717 |
出版年 | 2018 |
卷号 | 127页码:230-238 |
英文摘要 | CO2-fixing by soil autotrophic microbes is as important as by plants in semi-arid and arid ecosystems, such as the Tibetan Plateau grassland. CO2-fixing microbial community characteristics, capacity and their driving environmental factors remain unclear. Here we investigated the autotrophic microbial community in grassland surface soils on the Tibetan Plateau using molecular methods targeting the large subunit gene (cbbL) of ribulose-1, 5-bisphosphate carboxylase/oxygenase. The CO2 fixation capacity was assessed by the (CO2)-C-13 probing method. The results showed that soil autotrophic microbial abundance substantially increased from desert, steppe to meadow. The autotrophic abundance significantly increased with enhancing mean annual precipitation (MAP), soil ammonium concentration and aboveground plant biomass (APB). Forms IAB and IC autotrophic microbial communities strongly varied with grassland types. Variation partitioning analysis revealed that the structure variations were mainly explained by MAP and aridity, which explained 4.2% and 2.6% for the IAB community, and 7.6% and 8.5% for the IC community. Desert and steppe soils exhibited significantly higher atmospheric (CO2)-C-13 fixation rate than meadow soils (29 versus 18 mg kg(-1) soil d(-1)). The (CO2)-C-13 fixation rate negatively correlated with APB and soil ammonium concentration, demonstrating the substantially important role of autotrophic microbes in oligotrophic soils. Form IAB autotrophs were phylogenetically affiliated with Cyanobacteria. Form IC autotrophs were affiliated with Rhizobiales and Actinobacteria, the former gradually increased and the latter decreased from desert, steppe to meadow. Our findings offer new insight into the importance of MAP in driving soil autotrophic microbial community and highlight microbial roles in carbon cycling in dryland ecosystems. |
英文关键词 | Soil autotrophs CO2 fixation Tibetan plateau Grassland cbbL gene Stable isotope |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000449895600025 |
WOS关键词 | SUBUNIT GENES CBBL ; CARBON-DIOXIDE ; COMMUNITY STRUCTURE ; GENOME SEQUENCE ; GRASSLAND SOILS ; CLIMATE-CHANGE ; DIVERSITY ; BACTERIA ; CYANOBACTERIA ; ASSIMILATION |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
来源机构 | 北京师范大学 ; 中国科学院青藏高原研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/213212 |
作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100039, Peoples R China; 3.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Shijiazhuang 050021, Hebei, Peoples R China; 4.Chinese Acad Sci, Key Lab Urban Environm & Hlth, Inst Urban Environm, Xiamen, Peoples R China; 5.Wuhan Inst Technol, Sch Environm Ecol & Biol Engn, Res Ctr Environm Ecol & Engn, Wuhan 430073, Hubei, Peoples R China; 6.Beijing Normal Univ, Coll Resources Sci & Technol, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China |
推荐引用方式 GB/T 7714 | Zhao, Kang,Kong, Weidong,Wang, Fei,et al. Desert and steppe soils exhibit lower autotrophic microbial abundance but higher atmospheric CO2 fixation capacity than meadow soils[J]. 北京师范大学, 中国科学院青藏高原研究所,2018,127:230-238. |
APA | Zhao, Kang.,Kong, Weidong.,Wang, Fei.,Long, Xi-En.,Guo, Chunyan.,...&Dong, Xiaobin.(2018).Desert and steppe soils exhibit lower autotrophic microbial abundance but higher atmospheric CO2 fixation capacity than meadow soils.SOIL BIOLOGY & BIOCHEMISTRY,127,230-238. |
MLA | Zhao, Kang,et al."Desert and steppe soils exhibit lower autotrophic microbial abundance but higher atmospheric CO2 fixation capacity than meadow soils".SOIL BIOLOGY & BIOCHEMISTRY 127(2018):230-238. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。