舞阳河硅藻生物多样性及与水体重金属和总磷总氮关系的研究
发布时间：2018-11-13 15:44
【摘要】：舞阳河是长江水系的重要支流。随经济的增长水体污染严重,水体中的磷、氮和重金属污染等已开始危及到饮用水的安全。研究喀斯特生态环境下硅藻与重金属及TP、TN之间的关系,筛选出重金属污染硅藻指示属种,为舞阳河生物监测提供理论依据。本研究选取舞阳河为研究对象,对浮游硅藻和底栖硅藻共设置30个采样点,利用Person相关性分析、主成分分析等研究水体中硅藻群落、属种与重金属及TP、TN空间分布关系,筛选重金属污染指示属种。主要研究结果如下:1.舞阳河水体中硅藻共鉴定724种硅藻,浮游硅藻鉴定出硅藻196种(包括变种),隶属于2纲6目9科18属;底栖硅藻鉴定出硅藻528种(包括变种),隶属于2纲6目11科28属。2.通过对舞阳河河河水中TN、TP、Cu、Cd、Cr、Pb的测定发现各元素在舞阳河河各样点分布存在明显差异,但各金属浓度未有明显超标。3.舞阳河河中浮游硅藻丰度与Pb的r值为0.493**,(P0.01),差异极显著,说明舞阳河中浮游硅藻的丰度与Pb含量有极显著正相关关系,回归方程为y=8.118+0.371x;而底栖硅藻丰度与Cr的相关关系为极显著正相关(P0.01,r=0.469**),回归方程为y=16.510+2.737x;与Hg的相关关系为显著正相关(P0.05,r=0.426*),回归方程为y=13.264+6.588x。4.Pb与舟形藻属(Navicula)相对丰度呈正相关(r=0.305**,P0.01),Navicula aquaedurae Lange-Bertalot与Navicula pupula Kutzing var.pupula可能为本河流段中Pb重金属河流污染的指示物种。Cr与曲壳藻属(Achnanthes)相对丰度呈正相关(r=0.561**,P0.01),Achnanthes minutissima Kutzing var.minutissima和Achnanthes saccula Carter可能为本河流段中Cr重金属河流污染的指示物种。
[Abstract]:The Wuyang River is an important tributary of the Yangtze River. With the increase of economy, the pollution of water body is serious, the pollution of phosphorus, nitrogen and heavy metal in the water body has begun to endanger the safety of drinking water. The relationship between diatoms, heavy metals and TP,TN in karst ecological environment was studied. The indicating genera and species of diatoms contaminated by heavy metals were selected, which provided theoretical basis for biological monitoring of Wuyang River. In this study, 30 sampling sites were set up for phytoplankton diatoms and benthic diatoms. The relationship between diatom community and heavy metal and TP,TN spatial distribution in water was studied by Person correlation analysis and principal component analysis. Screening of heavy metal pollution indicator species. The main results are as follows: 1. A total of 724 species of diatoms were identified in the water of Wuyang River. 196 species (including varieties) of phytoplankton were identified, belonging to 2 classes, 6 orders, 9 families, 18 genera. 528 species (including varieties) of diatoms belonging to 2 classes, 6 orders, 11 families, 28 genera were identified. Through the determination of TN,TP,Cu,Cd,Cr,Pb in water of Wuyang River, it was found that there were obvious differences in the distribution of each element in various points of Wuyang River, but the concentration of each metal did not exceed the standard obviously. The r value of Pb and planktonic diatom abundance in Wuyang River was 0.493, (P0.01), which indicated that the abundance of phytoplankton in Wuyang River was positively correlated with Pb content, and the regression equation was y 8.118 0.371x. The correlation between abundance of benthic diatoms and Cr was significantly positive (P0.01RX 0.469 *), and the regression equation was YP16.510 2.737x. There was a significant positive correlation with Hg (P0.05 ~ 0. 426 *), and a positive correlation between the relative abundance of YJ13. 264 6.588x.4.Pb and (Navicula) (R0. 305, P0. 01). Navicula aquaedurae Lange-Bertalot and Navicula pupula Kutzing var.pupula may be the indicator species of Pb heavy metal pollution in this section. The relative abundance of Cr is positively correlated with the relative abundance of (Achnanthes) (r = 0.561, P 0.01). Achnanthes minutissima Kutzing var.minutissima and Achnanthes saccula Carter may be indicative species of Cr heavy metal pollution in this section.
【学位授予单位】：贵州师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X522;Q948.8
本文编号：2329589
[Abstract]:The Wuyang River is an important tributary of the Yangtze River. With the increase of economy, the pollution of water body is serious, the pollution of phosphorus, nitrogen and heavy metal in the water body has begun to endanger the safety of drinking water. The relationship between diatoms, heavy metals and TP,TN in karst ecological environment was studied. The indicating genera and species of diatoms contaminated by heavy metals were selected, which provided theoretical basis for biological monitoring of Wuyang River. In this study, 30 sampling sites were set up for phytoplankton diatoms and benthic diatoms. The relationship between diatom community and heavy metal and TP,TN spatial distribution in water was studied by Person correlation analysis and principal component analysis. Screening of heavy metal pollution indicator species. The main results are as follows: 1. A total of 724 species of diatoms were identified in the water of Wuyang River. 196 species (including varieties) of phytoplankton were identified, belonging to 2 classes, 6 orders, 9 families, 18 genera. 528 species (including varieties) of diatoms belonging to 2 classes, 6 orders, 11 families, 28 genera were identified. Through the determination of TN,TP,Cu,Cd,Cr,Pb in water of Wuyang River, it was found that there were obvious differences in the distribution of each element in various points of Wuyang River, but the concentration of each metal did not exceed the standard obviously. The r value of Pb and planktonic diatom abundance in Wuyang River was 0.493, (P0.01), which indicated that the abundance of phytoplankton in Wuyang River was positively correlated with Pb content, and the regression equation was y 8.118 0.371x. The correlation between abundance of benthic diatoms and Cr was significantly positive (P0.01RX 0.469 *), and the regression equation was YP16.510 2.737x. There was a significant positive correlation with Hg (P0.05 ~ 0. 426 *), and a positive correlation between the relative abundance of YJ13. 264 6.588x.4.Pb and (Navicula) (R0. 305, P0. 01). Navicula aquaedurae Lange-Bertalot and Navicula pupula Kutzing var.pupula may be the indicator species of Pb heavy metal pollution in this section. The relative abundance of Cr is positively correlated with the relative abundance of (Achnanthes) (r = 0.561, P 0.01). Achnanthes minutissima Kutzing var.minutissima and Achnanthes saccula Carter may be indicative species of Cr heavy metal pollution in this section.
【学位授予单位】：贵州师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X522;Q948.8
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