福建师范大学学报（自然科学版）2026，Vol.42Issue(3)：1-9,9.DOI:10.12046/j.issn.1000-5277.2026020006
溶解氧与温度波动对河口湿地碳组分的协同调控作用
Synergistic Regulation of Carbon Fractions by Dissolved Oxygen and Temperature Fluctuations in Estuarine Wetlands
摘要
Abstract
This study investigated the dynamics of carbon fractions in sediments of the Yangtze River Estuary wetlands through laboratory incubation experiments under varying dissolved oxygen(8 mg·L-1 normoxic vs.2 mg·L-1 hypoxic)and temperature(23,25,and 27℃)conditions.The results showed that elevated temperature and higher oxygen availability promoted the mineralization of sediment organic carbon,leading to significant reductions in labile carbon pools,whereas low temperature and hypoxia suppressed carbon decomposition and markedly constrained the mineraliza-tion capacity of sediment organic carbon.The temperature sensitivity(Q10)of sediment respiration was substantially higher under normoxic conditions,indicating that aerobic environments amplify the responsiveness of organic carbon mineralization to temperature variations.The proportion of iron-bound organic carbon was significantly higher under hypoxic than normoxic conditions,highlighting the critical role of dissolved oxygen in regulating carbon stability.关键词
溶解氧/温度/有机碳组分/有机碳矿化/温度敏感性/湿地/长江口Key words
dissolved oxygen/temperature/organic carbon fractions/organic carbon minerali-zation/temperature sensitivity(Q10)/wetland/Yangtze Estuary分类
资源环境引用本文复制引用
杜光月,宋振阳,冉佳丽,沈彦麒,郭萍萍,李小飞..溶解氧与温度波动对河口湿地碳组分的协同调控作用[J].福建师范大学学报（自然科学版）,2026,42(3):1-9,9.基金项目
国家自然科学基金项目(42271101) （42271101）
福建闽江河口湿地国家级自然保护区管理处项目(MJHKSD20230602) （MJHKSD20230602）
