高寒乔木与灌木林下土壤真菌群落结构特征  

Soil Fungal Community Structure under the Canopy of Alpine Trees and Shrubs

作　　者：李旭东 周华坤[2] 李宏林 史正晨 汤桂迎 吴发亮 姚俊飞 苏洪烨 阿的哈则 韩富忠 宋维秀[1] Li Xudong;Zhou Huakun;Li Honglin;Shi Zhengchen;Tang Guiying;Wu Faliang;Yao Junfei;Su Hongye;Adi Hazhe;Han Fuzhong;Song Weixiu(College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016,China;Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China;State Key Laboratory of Three Rivers Source Ecology and Plateau Agriculture and Animal Husbandry,Qinghai University,Xining 810008,China;Maixiu Forest Farm,Huangnan Tibetan Autonomous Prefecture,Qinghai Province,Huangnan 811401,China)

机构地区：[1]青海大学农牧学院,西宁810016 [2]中国科学院西北高原生物研究所,青海省寒区恢复生态学重点实验室,西宁810008 [3]青海大学省部共建三江源生态与高原农牧业国家重点实验室,西宁810008 [4]青海省黄南藏族自治州麦秀林场,黄南811401

出　　处：《青海科技》2024年第5期14-22,共9页Qinghai Science and Technology

摘　　要：为探讨高寒森林乔木与灌木林下土壤真菌群落结构的差异,该研究在青海省黄南州麦秀林场选择不同优势种组成的乔木林和灌木林各3处,通过采集林下0~10 cm土壤样品,运用高通量测序方法进行土壤真菌组成、丰度和多样性测定和分析。结果表明,灌木林下土壤真菌在所有分类级别上均显著高于乔木林下土壤真菌,且二者在群落结构上存在显著差异(P<0.05)。在门水平上,虽然子囊菌门(Ascomycota)在乔木林下土壤和灌木林下土壤中均为优势菌门,但担子菌门(Basidiomycota)在乔木土壤中更为丰富,而子囊菌门(Ascomycota)在灌木土壤中更占优势。在属水平上,乔木林下土壤中绿伞菌属(Chlorophyllum)和纤维根壳菌属(Fibulorhizoctonia)丰度较高,而在灌木林土壤中槽囊壳菌属(Lophiostoma)、筒壳菌属(Volutella)、黑孢菌属(Herpotrichiellaceae)和新壳菌属(Neonectria)的丰度较高。乔木林和灌木林在林下土壤中真菌群落结构和多样性上的差异反映了它们对不同环境的适应,该研究可为进一步理解高寒地区乔木和灌木林下土壤真菌分布及其对生境的响应提供数据依据。To explore the differences in soil fungal community structure under alpine forest trees and shrubs,this study selected three plots of tree forest and three plots of shrub forest with different dominant species in Maixiu Forest Farm,Huangnan Prefecture,Qinghai Province.Soil samples from 0-10cm depth were collected and analyzed for fungal composition,abundance,and diversity using high-throughput sequencing.The results showed that soil fungi under shrub canopies had significantly higher abundance at all taxonomic levels compared to those under tree canopies,and there were significant differences in community structure(P<0.05).At the phylum level,Ascomycota was the dominant in both tree and shrub soils,but Basidiomycota was more abundant in tree soils,while Ascomycota was more dominant in shrub soils.At the genus level,Chlorophyllum and Fibulorhizoctonia were more abundant in tree soils,while Lophiostoma,Volutella,Herpotrichiellaceae,and Neonectria were more abundant in shrub soils.The differences in fungal community structure and diversity between tree and shrub soils reflect their adaptations to different environments.This study provides data to better understand the distribution of soil fungi under alpine tree and shrub forests and their responses to habitat conditions.

关 键 词：高寒森林 乔木与灌木 土壤真菌群落 生态差异 

分 类 号：S714.3[农业科学—林学]