生态学杂志2025，Vol.44Issue(4)：1057-1064,8.DOI:10.13292/j.1000-4890.202504.029
亚热带森林源头溪流植物残体与沉积物钙、镁储量动态特征
Dynamics of calcium and magnesium storage in plant litter and sediments of a subtropical forest headwater stream
摘要
Abstract
Plant litter and sediments play a crucial role in the storage and migration of nutrients in forest headwater streams,and can significantly impact material cycling in downstream waters.We examined the spatial and temporal dynamics of calcium(Ca)and magnesium(Mg)concentrations and storage in plant litter and sediments of a sub-tropical forest headwater stream from March 2021 to February 2022 in the upper reaches of Minjiang River,San-ming,Fujian.Results showed that:(1)The maximum concentrations of Ca and Mg in plant litter were 15557.72 and 970.98 mg·kg-1 in December and October,respectively.The highest concentrations of sediment Ca and Mg were 1840.61 and 576.74 mg·kg-1 in August and May,respectively.(2)The highest storage of plant litter Ca and Mg was observed in April,with average values of 1.27 and 0.09 g·m-2,respectively,while those of sediment Ca and Mg occurred in August and May,with average values of 130.76 and 46.77 g·m-2,respectively.(3)The lar-gest storage of plant litter Ca and Mg occurred in the source reach,whereas that of sediments occurred in a sam-pling site with confluence at the middle-lower reaches of the stream.(4)Stream physical and chemical properties,particularly discharge,water temperature,monthly rainfall,rainfall frequency,and dissolved oxygen,significantly affected the storage and concentrations of Ca and Mg in plant litter and sediments.These results will help to better understand the role of forest headwater streams in nutrient storage and fluxes in subtropical forests.关键词
养分循环/溪流特征/支流汇入/钙/镁Key words
nutrient cycle/stream characteristics/inflow of tributary/calcium/magnesium引用本文复制引用
马弟婷,赵泽敏,胡婉榕,彭艳,袁朝祥,倪祥银,吴福忠,岳楷..亚热带森林源头溪流植物残体与沉积物钙、镁储量动态特征[J].生态学杂志,2025,44(4):1057-1064,8.基金项目
国家自然科学基金项目(32271633,32201342,32171641)和福建省自然科学基金项目(2003L3005,2022J01642)资助. （32271633,32201342,32171641）
