Milin Deng , Yong Zheng , Zi-Yang He , Maokui Lyu , Shengsheng Jin , Hao Yang , Hanshuo Zhang , Ji-Zheng He , Yongxin Lin
{"title":"Organic carbon negatively affects the diversity of soil nitrous oxide reducers in Chinese fir plantations at a regional scale","authors":"Milin Deng , Yong Zheng , Zi-Yang He , Maokui Lyu , Shengsheng Jin , Hao Yang , Hanshuo Zhang , Ji-Zheng He , Yongxin Lin","doi":"10.1016/j.apsoil.2024.105457","DOIUrl":null,"url":null,"abstract":"<div><p>Large-scale planting of Chinese fir (<em>Cunninghamia lanceolata</em>) can bring considerable economic benefits but also seriously alters soil properties, disrupting soil microbial survival patterns and giving rise to distinct microbial communities. Nitrous oxide (N<sub>2</sub>O) reduction is the sole recognized biological sink for N<sub>2</sub>O, thereby playing a critical role in forest nitrogen cycling. However, the distribution of N<sub>2</sub>O reducers in Chinese fir plantation soils and the underlying factors at a regional scale remain unclear. Here, we assessed the abundance, diversity, and community structure of <em>nosZ</em> I-type N<sub>2</sub>O reducers in soil samples collected from nine state-owned forest farms in Fujian Province, China. The abundance of <em>nosZ</em> I-type reducers exhibited significant variation across sites, with altitude exerting the greatest influence, positively influencing their abundance. Soil organic carbon (SOC) and dissolved organic carbon (DOC) were the strongest predictors of alpha-diversity. Interestingly, SOC and DOC exhibited a negative association with <em>nosZ</em> I-type reducer alpha-diversity. Additionally, DOC played a significant role in influencing community structure. All <em>nosZ</em> I sequences were associated with Alphaprotebacteria and Betaproteobacteria, with Alphaproteobacteria dominating <em>nosZ</em> I-type reducer communities in all soils, accounting for over 90 % of the total sequences. Moreover, the modified stochasticity ratio values exceeded 0.5 at all sampling sites except for one, characterized by the lowest pH and relatively lower nutrient content, indicating the predominance of stochastic processes in community assembly. Taken together, our results provide novel evidence that the augmentation of organic carbon content could potentially reduce diversity and alter the structure of <em>nosZ</em> I-type reducer communities, with potential implications for N<sub>2</sub>O emissions in Chinese fir plantations.</p></div>","PeriodicalId":8099,"journal":{"name":"Applied Soil Ecology","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Soil Ecology","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0929139324001884","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Large-scale planting of Chinese fir (Cunninghamia lanceolata) can bring considerable economic benefits but also seriously alters soil properties, disrupting soil microbial survival patterns and giving rise to distinct microbial communities. Nitrous oxide (N2O) reduction is the sole recognized biological sink for N2O, thereby playing a critical role in forest nitrogen cycling. However, the distribution of N2O reducers in Chinese fir plantation soils and the underlying factors at a regional scale remain unclear. Here, we assessed the abundance, diversity, and community structure of nosZ I-type N2O reducers in soil samples collected from nine state-owned forest farms in Fujian Province, China. The abundance of nosZ I-type reducers exhibited significant variation across sites, with altitude exerting the greatest influence, positively influencing their abundance. Soil organic carbon (SOC) and dissolved organic carbon (DOC) were the strongest predictors of alpha-diversity. Interestingly, SOC and DOC exhibited a negative association with nosZ I-type reducer alpha-diversity. Additionally, DOC played a significant role in influencing community structure. All nosZ I sequences were associated with Alphaprotebacteria and Betaproteobacteria, with Alphaproteobacteria dominating nosZ I-type reducer communities in all soils, accounting for over 90 % of the total sequences. Moreover, the modified stochasticity ratio values exceeded 0.5 at all sampling sites except for one, characterized by the lowest pH and relatively lower nutrient content, indicating the predominance of stochastic processes in community assembly. Taken together, our results provide novel evidence that the augmentation of organic carbon content could potentially reduce diversity and alter the structure of nosZ I-type reducer communities, with potential implications for N2O emissions in Chinese fir plantations.
期刊介绍:
Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.