| Depth effects on bacterial community assembly processes in paddy soils | |
Li, Weitao2 ; Kuzyakov, Yakov3,4,5; Zheng, Yulong2; Li, Pengfa1; Li, Guilong1; Liu, Ming1; Alharbi, Hattan A.; Li, Zhongpei1
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| 2022 | |
| Source Publication | SOIL BIOLOGY & BIOCHEMISTRY
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| ISSN | 0038-0717 |
| Volume | 165Issue:_Pages:- |
| Abstract | Bacterial communities in soil play a key role in carbon (C) and nutrient cycling. Unravelling how bacterial community assemble and distribute with soil depth is a prerequisite for understanding microbial functions, nutrient cycling and management. Twenty-six rice fields in a typical red soil area in a wet subtropical climate were sampled in the topsoil (0-10 and 10-20 cm) and subsoil (20-40 cm). Physico-chemical soil properties, quantitative fluorescence PCR and high-throughput sequencing were used to analyse the V4 region of 16S rDNA. The rRNA operon copy number and alpha diversity decreased continuously with soil depth because of reduced access to carbon, energy, oxygen and nutrients. The relative abundance of the dominant phyla Proteobacteria and Actinobacteria decreased with increasing soil depth, whereas the opposite trend was observed for the phylum Nitrospirae. The interaction intensity between taxa increased with depth, as limited carbon and nutrients in the undisturbed subsoil lead to the cooccurrence of taxa with similar ecological niches that cooperated to reduce functional redundancy. The higher modularity of the bacterial network in the topsoil is associated with greater environmental perturbations (flooding, fertilization, etc.) to maintain the robustness of the microbial community. Bacterial community assembly processes were stochastic up to 40 cm, but ecological drift was the predominant process in the topsoil, whereas dispersal limitation was dominant in the subsoil. The contribution of abiotic factors (e.g. nutrient and iron contents) and biotic factors (taxa-taxa interactions) as well as dispersal limitations to bacterial community assembly was depth specific. Concluding, the basic principles of bacterial community assembly were evaluated for the first time for a broad range of paddy soils. |
| Keyword | Rice paddies Bacterial community assembly Microbial beta diversity Land use Microbial distribution and niches |
| Subject Area | Agriculture |
| DOI | 10.1016/j.soilbio.2021.108517 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000776078500007 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/12999 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Menglun 666303, Yunnan, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71,East Beijing Rd,POB 821, Nanjing 210008, Peoples R China 3.Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Yunnan, Mengla, Peoples R China 4.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Dept Agr Soil Sci, Gottingen, Germany 5.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia 6.RUDN Univ, Agrotechnol Inst, Moscow, Russia 7.Alharbi, Hattan A.] King Saud Univ, Coll Food & Agr Sci, Dept Plant Protect, Riyadh 11451, Saudi Arabia |
| Recommended Citation GB/T 7714 | Li, Weitao,Kuzyakov, Yakov,Zheng, Yulong,et al. Depth effects on bacterial community assembly processes in paddy soils[J]. SOIL BIOLOGY & BIOCHEMISTRY,2022,165(_):-. |
| APA | Li, Weitao.,Kuzyakov, Yakov.,Zheng, Yulong.,Li, Pengfa.,Li, Guilong.,...&Li, Zhongpei.(2022).Depth effects on bacterial community assembly processes in paddy soils.SOIL BIOLOGY & BIOCHEMISTRY,165(_),-. |
| MLA | Li, Weitao,et al."Depth effects on bacterial community assembly processes in paddy soils".SOIL BIOLOGY & BIOCHEMISTRY 165._(2022):-. |
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| Depth effects on bac（9021KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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