人民珠江2024，Vol.45Issue(4)：77-86,10.DOI:10.3969/j.issn.1001-9235.2024.04.010
乐安河源区水库沉积硅藻分布特征及环境响应
Distribution Characteristics and Environmental Response of Diatoms Deposited in Reservoirs in the Source Region of Le'an River
摘要
Abstract
At present,the study of heavy metal pollution in the Le'an River Basin should be explored.To fully elucidate the environmental characteristics and change-driven processes of reservoirs in the source region of the Le'an River,this paper employs Qinghua and Shijing reservoirs with different ecological environments and development backgrounds as research objects.Experimental records of diatom species and physicochemical indicators in sedimentary column cores are conducted,and meanwhile combined with modern monitoring data and multivariate statistical methods,environmental characteristics driving factors affecting changes in sedimentary diatom assemblages and sedimentary environment in reservoirs are analyzed.The results show that nutrient levels in the reservoirs gradually increase with the depth to the surface,and the sediment pollution evaluation also reveals the collection process of nutrients.Universal and cleaning indicator species have been replaced by fouling-tolerant and eutrophication indicator species of sedimentary diatoms,with representative species being Achnanthidium minutissima and Navicula minima.The multivariate statistical analysis results show that TP,TN,TP,and TOC are the main driving factors of diatom community structure distribution in Qinghua and Shijing reservoirs respectively(p＜0.05).Box plot analysis results of 18 diatom indices reveal that CEE and LOBO indices are screened and show sound evaluation suitability and correlation.The input of exogenous materials into the reservoirs is affected by different anthropogenic practices to drive the succession of the diatom community,with a trend towards eutrophication in both reservoirs.关键词
硅藻/沉积物/富营养化/指数/乐安河Key words
diatom/sediment/eutrophication/index/Le'an River分类
建筑与水利引用本文复制引用
殷浤炜,张洁,严如玉,计勇,肖伟奇,蔡高堂..乐安河源区水库沉积硅藻分布特征及环境响应[J].人民珠江,2024,45(4):77-86,10.基金项目
国家自然科学基金项目(52269018、52109090) （52269018、52109090）
江西省科技厅项目(20202BBGL73094、20212BDH81002) （20202BBGL73094、20212BDH81002）
江西省研究生创新计划资助项目(YC2022-s977、YC2022-s984、YC2022-s992、YJSCX202204) （YC2022-s977、YC2022-s984、YC2022-s992、YJSCX202204）
