| 太原汾河景区浮游植物群落结构及其与环境因子关系分析 |
| 摘要点击 2501 全文点击 1185 投稿时间：2015-10-29 修订日期：2015-11-19 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 太原汾河景区 浮游植物 环境因子 冗余分析 水质 |
| 英文关键词 Fenhe Scenic Spot of Taiyuan phytoplankton environmental factors redundancy analysis(RDA) water quality |
|
| 中文摘要 |
| 为了探究太原汾河景区水体浮游植物群落结构特征及水质状况,对浮游植物的种类组成、生物量及其与环境理化因子的相关性进行监测. 在2014年丰水期6~10月对汾河太原景区从上游到下游设置9个采样点进行定期采样调查. 分析结果表明,太原汾河景区水体中浮游植物主要为蓝藻门、绿藻门、硅藻门植物,其中蓝藻植物数量最多,其次为绿藻和硅藻. 在丰水期浮游植物细胞密度呈现先上升后下降现象,7月达到最高. 采样点间也存在较大差异,位于汾河景区中下游的3个样点浮游植物数量最多. 浮游植物生物量与环境理化因子的关系通过冗余分析(RDA)进行整体排序,结果表明浮游植物总细胞密度与溶解氧呈显著正相关,与化学需氧量呈显著负相关. 硅藻细胞密度与水温、气温呈极显著正相关,与化学需氧量呈极显著负相关. 各种环境因子的作用在不同时期的表现不同. 综合营养状态指数分析,太原汾河景区水体中总氮在整个时空范围内超标,处于轻度到中度富营养水平状态. |
| 英文摘要 |
| In order to explore the structural characteristics of phytoplankton community and the water quality of the Fenhe scenic spot in Taiyuan, the species composition and the biomass of phytoplankton as well as their correlation with the environmental factors were monitored. The survey selected 9 sampling sites along the up and lower reaches in Fenhe scenic spot of Taiyuan, from Chaicun Bridge to Xiangyun Bridge. During the wet season (June-October) in 2014, specimens were collected, qualitative and quantitative investigation on the algae and monitoring on physicochemical indexes of the water were studied. Meanwhile, the water quality was analyzed and evaluated combining all the physicochemical indexes and cell density. Correlation analysis and RDA were conducted to analyze the relationship of algal community structure and the environmental factors. The main results showed that the dominant phytoplanktons were Cyanophyta, Chlorophyta and Bacillariophyta. The algal biomass first increased and then reduced during the wet season, and the maximum value of biomass occurred in July. There were many differences among different sampling points. The cell densities of phytoplankton were much higher in three central areas than the other sampling sites. Physical and chemical factors showed a variation tendency in time and space. Based on the results of RDA between phytoplankton cell densities and the physic-chemical parameters, the cell densities and the physic-chemical parameters had different correlations. The total cell density had significant positive correlation with dissolved oxygen, and negative correlation with COD. There were extremely significant positive correlations between diatom cell densities and water temperature, air temperature. But the diatom cell density was obviously negatively correlated with COD. It was distinct that the functions of the environment factors were different in temporal and spatial distribution. The state index of comprehensive nutrition indicated that the total nitrogen content was beyond the standard in all sampling sites during the whole wet season. The water quality varied from oligotrophic to light eutrophic. |
|
|
|
