毕业论文移动版

摘要年对合溪水系、西苕溪水系、东苕溪水系和京杭大运河水系的水质以及浮游植物进行季节性调查，分析了四个水系浮游植物的种类组成、优势种、群落结构的多样性特征及水质评价，为污染防治和生态修复提供依据。结果表明，在四个水系共采集浮游植物69种(变种)，隶属于7门、61 属;其中，绿藻门种类有30多种，其次是硅藻、蓝藻，分别占18、8种，其他门类种类较少。水质调查结果为总氮、总磷的含量在Ⅲ类水质标准以上，COD含量属于Ⅱ～Ⅳ类标准,DO含量属于Ⅰ～Ⅲ类标准。表明各水系富营养化主要体现为氮超标，硝氮和亚硝氮年平均含量较低。综合水质生物学和水体理化指标评价结果：合溪水系和西苕溪水系水质可评定为轻富营养型，东苕溪水系和京杭大运河水系水质可评定为中富营养型。 44238

Abstract：2013 - 2014 of Xitiaoxi River stream、Dongtiao stream line and the Beijing Hangzhou the Grande Canale river water quality and phytoplankton seasonal investigation, analysis and evaluation of persity characteristics and water quality, water is composed of four species of phytoplankton dominant species, community structure, and provide the basis for the prevention and control of pollution and ecological restoration. The results show that, in the four river systems were collected from 69 phytoplankton species (varieties), belonging to 7 phyla, 61 genera; among them, Chlorophyta was the most, up to 30, followed by bacillariophyta, Cyanophyta, accounted for 18, 8, other categories of species. Investigation of water quality results for the content of total nitrogen, total phosphorus in the above class III water quality standard, the content of COD belongs to grade II ~ III standard, the content of DO of grade I ~ III standard. That the water eutrophication mainly to exceed the standard nitrogen, nitrate nitrogen and nitrite nitrogen average content is low. The comprehensive quality of biology and water physicochemical evaluation results: Xi River and Xitiaoxi River water quality can be assessed as light eutrophic, Dongtiao stream line and the Beijing Hangzhou the Grande Canale river water quality can be assessed as a type of eutrophication.

毕业论文关键词：浮游植物; 群落结构; 多样性特征; 优势种; 水质评价; 

Keyword: Phytoplankton；Community structure；the characteristics of persity； the dominant species；Evaluation of water quality；

目     录

1. 引言 1

2. 材料与方法 1

2.1. 样点设置 1

2.2. 采样与分析 2

2.3. 浮游植物群落分析 2

2.4. 水质评价方法 3

3. 结果与分析 3

3.1. 种类组成 3

3.2. 浮游植物丰度的季节性变化 4

3.3. 各水系优势种及浮游植物生物量的季节性变化 5

3.4. 浮游植物多样性指数 7

4. 水质调查结果 8

4.1. 个水系水质指标的年变化 8

4.2. 各水系水质指标的季节变化 8

5. 水质评价 10

5.1. 水质化学指标 10

5.2. 浮游植物群落 10

5.2.1. 浮游植物种类组成 10

5.2.2. 浮游植物丰度与生物量 (责任编辑：qin)