摘要
为了解通江城市河道浮游植物分布动态规律,同时为制定有效的水环境质量改善方案,对镇江市古运河的浮游植物组成与分布变化进行现场调查与分析,探讨了环境因子变化对河道浮游植物结构与数量的影响。结果表明,研究区共检出藻类6门38属,其中绿藻门、蓝藻门和硅藻门为3个常见门类。河道内藻类细胞密度与生物量排序为春季>秋季>夏季>冬季。对比河源采样点,河道内藻类细胞密度、生物量均在春、秋季大幅增长,藻类种类组成比例也逐渐由硅藻门为主过渡到以绿、蓝藻为主,但在夏、冬季这种变化趋势不明显。水动力、营养盐浓度、水温以及水体悬浮泥沙含量等多环境因子影响了河道内藻类生长与繁殖条件,其中因受闸控影响的水动力学条件变化是造成藻类分布变化的关键诱发要素。
The composition and quantity of phytoplankton were investigated in the Ancient Canal in Zhen-jiang City,and the effect of environmental factors on the composition and quantity of phytoplankton were simultaneously discussed to find out the phytoplankton distribution of the urban river connected with the Yangtze River and to establish effective restoration plan.Results showed that there were 38species of phytoplankton belonging to 6phyla,in which Chlorophyta,Cyanophyta and Bacillariophyta were familiar phyla.In general,the biomass and density of phytoplankton were springautumnsummerwinter.Compared with the reference site on riverhead,the biomass and density of phytoplankton increased severely along the river in spring and autumn,and the composition of algae was gradually changed from the predominant Bacillariophyta phylum to the predominant phyla Chlorophyta and Cyanophyta,but these change trends were not evident in summer and winter.The growth of phytoplankton in the river was influenced by various factors including the hydraulic condition,the nutrient level,the water temperature and the suspended sediments in water.Among these,the change of hydraulic condition caused by the impounding was primary.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2010年第11期1249-1255,共7页
Resources and Environment in the Yangtze Basin
基金
国家高技术研究发展计划"863"项目(2003AA601100)
国家科技重大专项(2008ZX07421-002)
南京工业大学青年重点基金(39727005)
关键词
浮游植物
分布特征
镇江
古运河
phytoplankton
growth rule
Zhenjiang City
the Ancient Canal
