文献类型：期刊文献

中文题名：降水格局变化对闽楠人工幼林土壤微生物群落结构及功能的影响

英文题名：Impact of precipitation pattern changes on the soil microbial community structure and function in artificial young forests of Phoebe bournei

作者：郭昊[1,3] 王旭[2,3] 宝音满达[2,3] 曹窈畅[4] 陈洁[2] 周光益[2,3] 陈跃华[5] 宋希强[1]

第一作者：郭昊

机构：[1]热带特色林木花卉遗传与种质创新教育部重点实验室/海南大学热带农林学院,海口570228;[2]中国林业科学研究院热带林业研究所,广州510520;[3]南岭北江源国家森林生态系统观测站,广州510520;[4]中南林业科技大学,长沙410004;[5]湖南省临武县西山国有林场,临武424300

年份：2025

卷号：31

期号：12

起止页码：1884-1895

中文期刊名：应用与环境生物学报

外文期刊名：Chinese Journal of Applied and Environmental Biology

收录：;北大核心:【北大核心2023】；

基金：中央级科研院所基本科研业务专项项目(CAFYBB2021ZE001)资助。

语种：中文

中文关键词：降水格局;模拟控制;功能预测;微生物群落结构;人工幼林

外文关键词：precipitation pattern;simulation control;functional prediction;microbial community structure;artificial young plantation

分类号：S714.3

摘要：近年来全球多地呈现极端降水和干旱事件并发的趋势,热带亚热带地区降水格局将呈现出旱季更干、雨季更湿的特点.土壤微生物是森林生态系统的重要组成部分,降水格局变化引起水文过程的变化,进而影响土壤水分、微生物和凋落物分解等变化,从而影响森林生态系统的多种功能.为深入探究降水格局变化对中亚热带森林土壤微生物群落的影响,以6年生闽楠(Phoebe bournei)人工幼林为研究对象,通过野外原位降水控制实验模拟“旱季更干,雨季更湿”的降水格局变化模式(precipitation change,PC),并以自然降水(natural precipitation,NP)为对照,采用高通量测序技术,分析降水格局变化下土壤细菌、真菌和古菌的群落多样性、组成和功能特征及其差异,探究影响微生物变化的关键环境因子.结果显示:(1)PC处理显著影响细菌和真菌β多样性,但对微生物α多样性均无显著影响;(2)PC处理改变了微生物群落的结构组成,细菌变形菌门相对丰度增加了44.80%,真菌担子菌门和古菌疣微菌门相对丰度分别减小了56.78%和47.59%;(3)PC处理对细菌化能异养、有氧化能异养和古菌好氧氨氧化、硝化作用及真菌植物病原菌和动物寄生菌功能群丰度均产生积极影响;(4)PC和NP处理下影响微生物群落结构和功能的驱动环境因子存在差异,降水格局变化下影响土壤细菌和古菌的最关键理化因子为pH,真菌则为土壤全磷.可见,降水格局变化通过调控土壤pH和全磷等关键理化因子,重塑中亚热带闽楠人工幼林土壤微生物群落结构与功能特征,且对不同类群微生物的影响存在差异性.
In recent years,concurrent extreme precipitation and drought events have become increasingly frequent worldwide.Tropical and subtropical regions are expected to exhibit precipitation patterns characterized by drier dry seasons and wetter rainy seasons.Soil microorganisms are critical components of forest ecosystems,and changes in precipitation patterns can alter hydrological processes,leading to variations in soil moisture,microbial activity,and litter decomposition,ultimately affecting multiple ecosystem functions.To investigate the impact of altered precipitation patterns on soil microbial communities in a mid-subtropical forest,a field-based precipitation control experiment was conducted in a six-year-old Phoebe bournei plantation.The experiment simulated a precipitation change(PC)pattern of“drier dry seasons and wetter rainy seasons”using natural precipitation(NP)as the control.High-throughput sequencing was employed to analyze soil bacterial,fungal,and archaeal community diversity,composition,and functional characteristics,and to identify key environmental factors driving microbial changes under altered precipitation conditions.The results showed that:(1)The PC treatment significantly influenced bacterial and fungalβ-diversity but had no significant effect on microbialαdiversity;(2)PC treatment altered microbial community composition,increasing the relative abundance of Proteobacteria by 44.80%,while reducing the relative abundances of Basidiomycota and Thaumarchaeota by 56.78% and 47.59%,respectively;(3)PC treatment positively impacted functional groups such as chemoheterotrophic and aerobic chemoheterotrophic bacteria,aerobic ammonia-oxidizing and nitrifying archaea,as well as fungal plant pathogens and animal parasites;(4)The key environmental factors driving microbial community structure and function differed between PC and NP treatments.Under altered precipitation patterns,soil pH was the most critical physicochemical factor influencing bacterial and archaeal communities,while total phosphorus(TP)was the key factor for fungi.In summary,alterations in precipitation patterns reshape the community structure and function of soil microbes in 6-year-old young Phoebe bournei plantations in the subtropical zone of China by regulating key physicochemical factors(e.g.,soil pH and total phosphorus),with heterogeneous impacts on distinct microbial taxa.