农业环境科学学报Issue(12)：2349-2356,8.DOI:10.11654/jaes.2015.12.014
湖泊水-沉积物界面SiO3-Si交换通量研究
Exchange Fluxes of SiO3-Si Across Water-Sediment Interface in Different Lakes
摘要
Abstract
Silicon(Si)flux greatly influences Si concentrations and primary productivity of aquatic ecosystems. An investigation was con-ducted to examine the release characteristics and fluxes of SiO3-Si across the water-sediment interface in Lake Wuliangsuhai(WLSH)and Daihai(DH)by employing columnar simulation method. During the summer of 90 days, the exchange rate of SiO3-Si at the water-sediment interface was about 1.28 mmol·m-2·d-1, with 963.07 t of SiO3-Si released into lake water in WLSH, while it was about 1.10 mmol·m-2·d-1 and 1.95 mmol·m-2·d-1 in the deep and shoal water zones, respectively, with 893.41 t of SiO3-Si entered in Lake DH. This indicated that the sediments in WLSH and DH functioned as source of SiO3-Si in the summer. The exchange rate of SiO3-Si at sediments-water interface was correlated with clay and biogenic silica(BSi)content and particle size of the sediments. Silicon released from sediments played an important role in maintaining lake primary productivity, providing 15%and 49.5%of SiO3-Si required by phytoplankton in WLSH and DH, respec-tively. The stoichiometry results showed that phosphorus and SiO3-Si would be the limiting nutrients for the primary productivity of phyto-plankton in WLSH and DH, respectively.关键词
硅/扩散通量/释放速率/水-沉积物界面/湖泊Key words
SiO3-Si/diffusion flux/release rate/sediment-water interface/lake分类
资源环境引用本文复制引用
颜道浩,吕昌伟,何江,王伟颖,左乐,李磊..湖泊水-沉积物界面SiO3-Si交换通量研究[J].农业环境科学学报,2015,(12):2349-2356,8.基金项目
国家自然科学基金项目（41003049，40863003）；内蒙古自然科学基金项目 （）
