Stochastic and deterministic drivers of seasonal variation of fungal community in tobacco field soil

PeerJ

article

Xing Li¹  Tianming Li¹  Delong Meng¹  Tianbo Liu³  Yongjun Liu³  Huaqun Yin¹  Jie Deng⁴  Songrong Zeng⁵  Li Shen¹ 

[1] School of Minerals Processing and Bioengineering, Central South University;Key Laboratory of Biometallurgy, Ministry of Education;College of Agronomy, Hunan Agricultural University;School of Ecological and Environmental Sciences, East China Normal University;Hery Fok Collge of Life Sciences, Shaoguan University

关键词: Seasonal variation;    Fungal community;    Community assembly;    Ecological processes;    Stochastic process;    Dispersal;   

DOI  :  10.7717/peerj.6962

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background The soil fungal community plays an important role in global carbon cycling and shows obvious seasonal variations, however, drivers, particularly stochastic drivers, of the seasonal variation in the fungal community have never been addressed in sufficient detail. Methods We investigated the soil fungal community variation between summer growing (SG) and winter fallow (WF) stage, through high throughput sequencing of internal transcribed spacer (ITS) amplicons. Subsequently, we assessed the contribution of different ecological processes to community assembly using null-model-based statistical framework. Results The results showed that the fungal community diversity decreased significantly after tobacco cropping in the SG stage and the composition showed a clear turnover between the WF and SG stages. The variation in community composition was largely attributable to the presence of a small portion of Dothideomycetes in the WF stage that dominated the soil fungal community in the SG stage. The organic matter, temperature, and water content were the main deterministic factors that regulated the fungal community; these factors explained 34.02% of the fungal community variation. Together with the result that the fungal community was mainly assembled by the dispersal process, our results suggested that the stochastic factors played important roles in driving the seasonal variation of fungal community. The dispersal limitation dominated the fungal community assembly during the WF stage when homogenizing dispersal was the main assembly process of the fungal community in the SG stage. Thus, we proposed that the dispersal processes are important drivers for seasonal variation of fungal community in tobacco planted soil.

【 授权许可】

CC BY