水生生物学报2025，Vol.49Issue(7)：45-56,12.DOI:10.7541/2025.2024.0460
西藏南部温泉泛化种和特化种的群落构建过程
THE COMMUNITY ASSEMBLY PROCESS OF GENERALIZED AND SPECIA-LIZED HOT SPRING SPECIES IN SOUTHERN XIZANG,CHINA
摘要
Abstract
In this study,we employed 18S rDNA high-throughput sequencing and environmental factor analysis to explore the community assembly mechanisms of generalized and specialized microbial eukaryotes,as well as their responses to environmental changes in 34 hot springs in southern Xizang,China.The results showed that the propor-tion of specialized species was higher,with the dominant phyla including Ascomycota,Chlorophyta,and Arthropoda.Generalized species were mainly composed of Ascomycota,Basidiomycota,and Chordata.The species richness of specialized was significantly higher than that of generalized,although their evenness was lower.β-diversity analysis indicated that both groups were mainly characterized by species turnover.Network analysis revealed that the specia-lized species exhibited a higher degree of modularity,whereas the generalized species showed stronger connectivity and higher network stability,which may enhance their ability to respond quickly to environmental changes.The community assembly was primarily driven by stochastic processes,with generalized species dominated by undominant processes and heterogeneous selection,while specialized species were more dependent on homogenous dispersal.Among the environmental factors,temperature,latitude,and ammonium nitrogen significantly influenced the distribu-tion of generalized species,with temperature and latitude having a more significant effect.For specialized species,temperature,pH,and altitude were more important,with temperature and pH having the greatest influence.Electrical conductivity may,to some extent,influence the community assembly process of generalized and specialized species.Overall,generalized species exhibited broader adaptability,while specialized species demonstrated stronger adaptabi-lity to specific habitats.This study provides new insights into the community assembly mechanisms and ecological functions of plateau geothermal spring ecosystems and offers scientific evidence to global research on microbial diver-sity in extreme environments.关键词
群落多样性/共现网络/微真核生物/青藏高原Key words
Community diversity/Co-occurrence network/Microeukaryotes/Qinghai-Xizang Plateau分类
生物学引用本文复制引用
闫冰洁,徐佳杰,卫佩佩,王陈,姜传奇,巴桑..西藏南部温泉泛化种和特化种的群落构建过程[J].水生生物学报,2025,49(7):45-56,12.基金项目
国家自然科学基金面上项目(32070418) （32070418）
西藏大学研究生高水平人才培养计划(2022-GSP-S071)资助[Supported by the Na-tional Natural Science Foundation of China(32070418) （2022-GSP-S071）
the High-Level Talent Training Program for Postgraduate of Tibet Univer-sity(2022-GSP-S071)] （2022-GSP-S071）
