湖泊科学2026，Vol.38Issue(2)：762-778,17.DOI:10.18307/2026.0231
不同补给模式下冰川湖泊浮游藻类群落异质性及其构建机制
Heterogeneity of planktonic algal communities in glacial lakes under different recharge modes and its construction mechanism
摘要
Abstract
In the context of global warming,the retreat of glaciers on the Qinghai-Tibet Plateau has led to the formation of diverse glacial lakes.This process,by altering aquatic environmental conditions,influences the composition and distribution of microbial communities within these lakes.Investigating the heterogeneity of distinct algal communities and their assembly mechanisms across various glacial lake types is essential for understanding the distribution patterns of eukaryotic phytoplankton and their responses to environmental changes.This study focused on 10 glacial lakes in the Kuoqionggangri Glacier region of the southern Qinghai-Tibet Plateau,categorizing them into proglacial lakes,glacier-fed lakes,and non-glacier-fed lakes based on their meltwater supply pat-terns.By employing 18S rDNA amplicon sequencing,co-occurrence network analysis,and community assembly modeling,we e-valuated the impact of different water sources on eukaryotic phytoplankton communities.Results indicated that Chlorophyta was the dominant phylum.Proglacial lakes exhibited the highest α-diversity,the most stable community structures,and assembly processes governed primarily by dispersal limitation.Conversely,glacier-fed lakes displayed more fragmented community structures shaped mainly by heterogeneous selection,while non-glacier-fed lakes showed the lowest α-diversity,relied on strong species interactions for stability,and were dominated by stochastic assembly processes.Water conductivity and total dissolved solids were identified as significant factors influencing α-diversity,whereas nutrients exhibited limited effects.These findings underscore the substantial heterogeneity among glacial lake types in terms of species composition,α-and β-diversity,community stability,assembly mecha-nisms,and environmental drivers.This study provides critical insights into microbial community dynamics and ecological responses to environmental change in high-altitude glacial lake ecosystems.关键词
浮游藻类/冰川湖泊/群落结构/构建机制/青藏高原/廓琼岗日冰川Key words
Planktonic algae/glacial lakes/community structure/assembly mechanism/Qinghai-Tibet Plateau/Kuoqionggangri Glacier引用本文复制引用
陆林源,李晓东,胡涵,侯宝森,童银栋..不同补给模式下冰川湖泊浮游藻类群落异质性及其构建机制[J].湖泊科学,2026,38(2):762-778,17.基金项目
国家自然科学基金项目(U24A20640,42377399)、西藏自治区重点研发计划项目(XZ202502ZY0019,XZ202501ZY0138)、西藏自治区基地与人才建设项目(XZ202502JD0025)和西藏大学国家级大学生创新训练项目(202510694033)联合资助. （U24A20640,42377399）
