河道整治对水质及浮游生物群落特征的影响——以重庆市大足区窟窿河三驱镇段为例

发布时间：2018-04-19 21:46

本文选题：窟窿河 + 河道整治　；参考：《重庆师范大学学报(自然科学版)》2017年04期

【摘要】：【目的】调查进行综合治理后的重庆市大足区窟窿河三驱镇河段水质状况。【方法】于2015年11月对该河段中浮游生物指示种、多样性、群落结构及水质理化参数进行了调查。【结果】窟窿河三驱镇段共有浮游植物8门84属174种(含变种)、浮游动物3门25属33种。河段上、下游生物群落结构差异较大。浮游植物密度在上游两个采样点分别为1.35×107,1.58×107个·L~(-1),在下游采样点仅为4.3×106个·L~(-1);浮游动物密度在上游两个采样点分别为3.96×103,5.20×103个·L~(-1),在下游采样点则降至3.20×103个·L~(-1)。指示型为多污、中污带的3种隐藻即尖尾蓝隐藻(Chroomonas acuta)、啮蚀隐藻(Cryptomonas erosa)和卵形隐藻(Cryptomonas ovata)在河段上游为绝对优势种,而在下游仅少量发现,且优势种中的中污、寡污带指示种数量增多,暗示窟窿河水质有所好转。【结论】综合ShannonWeiner多样性指数、Margalef丰富度指数和Pielou均匀度指数的结果可知,经过治理后的河段浮游植物的丰富度与群落稳定性有所提高。综合营养状态指数的结果显示,研究河段水质由上游的中度/重度富营养状态向下游轻度富营养级转变。研究结果表明河道整治工程对研究河段水质有明显的改善作用。
[Abstract]:[objective] to investigate the water quality of Sanduzhen reach of the Gouhe River in Dazu District of Chongqing after comprehensive management. [methods] the diversity and diversity of plankton indicator species in the reach of Dazu River in November 2015 were investigated. The community structure and physical and chemical parameters of water quality were investigated. [results] there were 174 species of phytoplankton belonging to 84 genera and 8 phyla in Sanduzhen section of the Gounong River, including 3 phyla, 25 genera and 33 species of zooplankton. In the upper and lower reaches of the river, there are great differences in the structure of the biota. The density of phytoplankton was 1.35 脳 10 ~ 7 ~ 1.58 脳 10 ~ (7) L ~ (-1) ~ (-1) in the upper reaches and 4.3 脳 10 ~ (6) L ~ (-1) ~ (-1) in the lower reaches, and the density of zooplankton was 3.96 脳 10 ~ (3) ~ 5.20 脳 10 ~ (3) L ~ (-1) in the upper reaches and 3.20 脳 10 ~ (3) L ~ (-1) L ~ (-1) in the downstream sampling sites. The three species of Cryptomonas acutaa (Cryptomonas erosa) and Cryptomonas ovata (Cryptomonas ovata) are the dominant species in the upper reaches of the river, but only a few species are found in the lower reaches. The increase in the number of indicator species in the oligopollution zone suggests that the water quality of the river has improved. [conclusion] the results of ShannonWeiner diversity index, Margalef richness index and Pielou evenness index show that, The richness and community stability of phytoplankton were improved after treatment. The results of comprehensive nutritional status index showed that the water quality of the study reach changed from medium / heavy eutrophication status upstream to mild eutrophication level downstream. The results show that the river regulation works can improve the water quality of the reach.
【作者单位】：重庆师范大学生命科学学院重庆市高校动物生物学重点实验室重庆市高校生物活性物质工程研究中心;
【基金】：重庆市研究生科研创新项目(No.CYS16148) 重庆交通科研设计研究院有限公司项目(No.20151109)
【分类号】：Q178;TV85;X52

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