Pedosphere (6): 819--827, 2023
ISSN 1002-0160/CN 32-1315/P
©2023 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Environmental similarity is more important than distance in the community structuring processes of ammonia-oxidizing archaea in agricultural soils |
Dorsaf KERFAHI1, Yu SHI2,3, Baozhan WANG4, Hokyung SONG5, Haiyan CHU3,6, Jonathan M. ADAMS7 |
1 School of Natural Sciences, Department of Biological Sciences, Keimyung University, Daegu 42601(Korea)
2 State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475001(China)
3 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008(China)
4 Key Lab of Microbiology for Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095(China)
5 Department of Earth and Environmental Sciences, The University of Manchester, Manchester M13 9PL(UK)
6 University of Chinese Academy of Sciences, Beijing 101408(China)
7 School of Geography and Oceanography, Nanjing University, Nanjing 210008(China) |
| ABSTRACT |
| Ammonia-oxidizing archaea (AOA) are important in converting ammonia into nitrate in soils. While many aspects of their community structure have been studied, the relative importance of stochastic versus deterministic processes has poorly been understood. We compared AOA communities across the North China Plain, targeting the amoA gene. A phylogenetic null modelling approach was used to calculate the beta nearest taxon index to quantify the influence of stochastic and deterministic processes. We found that spatial distance between samples predicted the perceived processes involved in community structuring, with stochastic processes dominating at local scales. At greater distances, stochasticity became weaker. However, soil pH, which was also the strongest determinant of AOA community, was a much stronger predictor of community structuring, leaving the distance effect redundant as an explanation of community structuring processes. The communities of AOA differing by less than 1 pH unit differed mainly stochastically in terms of operational taxonomic unit composition. At larger pH differences, deterministic processes based on heterogeneous selection between clades became increasingly dominant. It appears that AOA community composition is largely determined by the environment. However, very similar pH environments are the exception. In environments with very close pH values, stochastic effects dominantly cause differences in community composition, whether spatially near or far. |
| Key Words: amoA gene,ammonia-oxidizing bacteria,assembly processes,beta nearest taxon index,community structure,operational taxonomic unit |
| Citation: Kerfahi D, Shi Y, Wang B Z, Song H, Chu H Y, Adams J M. 2023. Environmental similarity is more important than distance in the community structuring processes of ammonia-oxidizing archaea in agricultural soils. Pedosphere. 33(6): 819-827. |
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