附着藻类对沉积物磷的影响

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目 录

题目 富营养化进程中附着藻类对沉积物磷的影响…………………………………1

1引言……………………………………………………………………5

1.1研究背景……………………………………………………………………………………5

1.2附着藻类……………………………………………………………………………………5

1.2.1附着藻类的影响因素………………………………………………………………5

1.2.1.1温度……………………………………………………………………………5

1.2.1.2光…………………………………………………………………………………5

1.2.1.3 营养盐……………………………………………………………………………6

1.3湖泊沉积物中的磷的形态…………………………………………………………………6

2 材料与方法……………………………………………………6

2.1实验材料…………………………………………………………………………6

2.2实验设计…………………………………………………………………………6

2.3测定方法………………………………………………………………………………7

2.3.1 沉积物总氮(TN)､有机碳(TOC)含量测定…………………………………………7

2.3.2沉积物个磷形态的含量测定…………………………………………………………7

2.3.2.1 TP的测定……………………………………………………………………7

2.3.2.2 IP和OP的测定………………………………………………………………7

2.3.2.3 Fe/Al-P和Ca-P含量的测定……………………………………………………8

2.3.3 附着藻类的组成鉴定…………………………………………………………………8

2.3.4附着藻类叶绿素a的测定……………………………………………………………8

2.3.5数据处理………………………………………………………………………………9

3 结果与分析…………………………………………………………9

3.1不同营养条件下附着藻类的生长…………………………………………………………9

3.1.1不同富营养化程度下沉积物表层附着藻类叶绿素a(chla)的分布…………………9

3.1.2 附着藻类的组成………………………………………………………………………10

3.1.3附着藻类在不同营养程度对沉积物各种磷形态含量的影响………………………15

3.1.3.1附着藻类对沉积物总磷(TP)的影响……………………………………………15

3.1.3.2附着藻类对沉积物铁铝磷(Fe/Al-P)的影响……………………………………16

3.1.3.3附着藻类对沉积物钙磷(Ca-P)的影响…………………………………………17

3.1.3.4 附着藻类对沉积物有机磷(OP)的影响…………………………………………17

3.1.3.5 附着藻类对沉积物无机磷(IP)的影响…………………………………………18

4､讨论与小结…………………………………………………………18

参考文献………………………………………………………………19

致谢……………………………………………………………………22

富营养化进程中附着藻类对沉积物磷的影响

任思瑶

, China

Abstract: In order to study the effects of epipelic algae attached to sediments on phosphorus morphologyin the process of water eutrophication. epipelic algal biomass (chlorophll) and community composition and phosphorus fractions were researched by indoor simulation experiment under different eutrophication levels. The results showed that the biomass of epipelic algae is positively correlated with the nutrient concentration in column water. Cyanophyta and diatoms are the dominant species under the condition of medium and low concentration of nutrient, and Cyanophyta and green algae are the dominant species in high concentration nutrient concentrations. epipelic algae had an effect on phosphorus morphology. In this experiment, under the condition of the same the nutrientconcentration of water , Fe/Al-P, Ca-P and organ phosphorus on the surface of sediments showed a downward trend first and then an upward trend, while inorganic phosphorus content showed a downward trend first , and a small change in total phosphorus content. The higher the biomass of epipelic algae, the greater the effect of epipelic algae on the phosphorus forms in sediments.

Key words: epipelic algae; sediment; phosphorus; eutrophication

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