水生态学杂志2026，Vol.47Issue(2)：78-88,11.DOI:10.15928/j.1674-3075.202309150254
云南小型高山湖泊沉积物产甲烷潜势及其驱动因素
Methane Production and Driving Factors in Sediments of Small Alpine Lakes on the Yunnan Plateau
摘要
Abstract
Alpine lakes,rarely affected by human activities,are ideal for studying the mechanisms of lake methane(CH4)production and emission on natural environmental change.In this investigation,three small alpine lakes(Taiji Lake,Jiehu Lake and Sanxuan Lake)on Laoj unshan Mountain,Yunnan Province were selected for case study.Sediment CH4 production and primary driving factors were explored to bet-ter understand CH4 generation and emission.In the summer of 2022,we monitored routine water quality parameters,assessed sediment CH4 production and measured CH4 emission fluxes at the water-air inter-face.We also examined the influence of electron acceptors(SO42-,NO3-,Fe3+)and total Mn in sediment porewater,and the effect of sediment organic content on sediment CH4 production.Net CH4 emissions in all three lakes were low[0.12-1.21 mmol/(m2·d)],attributed primarily to low water temperatures(14.66-16.09 ℃)and high dissolved oxygen levels(78.40％-84.88％saturation).In all three lakes,CH4 produc-tion was relatively high in the top 5 cm of sediment and decreased as sediment depth increased.Anaero-bic oxidation of CH4 occurred in the sediment to varying degrees,with Fe3,SO42-,NO3-and total Mn po-tentially acting as electron acceptors in the oxidation process.Sediment organic content did not signifi-cantly affect sediment CH4 production,but there was nitrogen enrichment in the top 15 cm of sediments that could contribute to the higher CH4 production observed in the surface sediments.These results con-tribute to our understanding of CH4 dynamics in Alpine Lakes.关键词
碳循环/氮素富集/甲烷厌氧氧化/有机质含量/高山湖泊Key words
carbon cycling/nitragen enrichment/anaerobic methane oxidation/organic matter content/alpine lakes分类
资源环境引用本文复制引用
范雨春,刘流,刘智,孔令阳,黄林培,康满春,石小涛,陈光杰..云南小型高山湖泊沉积物产甲烷潜势及其驱动因素[J].水生态学杂志,2026,47(2):78-88,11.基金项目
云南省西南联合研究生院科技专项(202302AP370001) （202302AP370001）
云南省基础研究计划项目面上项目(202401AT070132) （202401AT070132）
国家自然科学基金项目(42207089,42311530334) （42207089,42311530334）
云南省科技厅社会发展重大专项(202203AC100002) （202203AC100002）
云南省科技厅异龙湖高原浅水湖泊云南省野外科学观测研究站(202305AM070002). （202305AM070002）
