松嫩平原西侧现代湖泊藻类群落结构特征及其影响因素分析

Structural characterization of algal community in modern lakes of west Songnen Plain and identification of its influencing factors

现代松嫩平原之上广泛发育湖泊,导致其生长的藻类群落存在明显差异,通过分析现代湖泊藻类群落结构与其影响因素的相关性,是研究藻类群落与不同类型湖泊之间关系的重点。对松嫩平原西侧地区的察尔森水库、尼尔基水库、中内泡藻类群落结构进行分析。同时结合水体金属离子含量、矿化度、pH值、温度等理化性质的测试结果发现:察尔森水库的藻类群落特征为硅藻——蓝藻、绿藻型,其中硅藻含量占比较大,尼尔基水库藻类群落结构特征为硅藻——蓝藻、绿藻型,其蓝藻和绿藻含量占比较察尔森水库上升,中内泡藻类群落特征为蓝藻、绿藻——硅藻型;平原湖泊蓝藻生长旺盛而硅藻生长受抑制,山地湖泊硅藻生长旺盛而蓝藻生长受抑制;矿化度高的湖泊蓝藻生长旺盛;水体中金属离子锶含量较高的湖泊,蓝藻生长相对旺盛,硅藻生长受到抑制;水体中金属离子铜和钡含量较高的湖泊可以促进绿藻的生长。这可能与湖泊的地理特征和水体特征不同,导致藻类植物生长环境不同有关。

Lakes are widely developed on the modern Songnen Plain,resulting in significant differences in algal communities.It is important to study the relationship between different lake types and algal communities by analyzing the relationship between algal community structure and its influencing factors in modern lakes.The algal community structure of Chaersen Lake,Nierji Lake and Zhongnei Lake in the west of Songnen Plain is analyzed with both old and new methods.At the same time,when the physical and chemical properties of water such as metal ion content,salinity,pH value and temperature were taken into account,we found that the algal community in Chaersen Lake is characterized by diatoms,cyanobacteria and green algae,and the content of diatom is relatively large.The algal community structure in Nierji Lake is characterized by diatom,cyanobacteria and green algae;the content of cyanobacteria and green algae is higher than that in Chaersen Lake;and the algal community in Zhongnei Lake is characterized by cyanobacteria,green algae and diatom.The growth of cyanobacteria in plain lakes was vigorous but the growth of diatoms was inhibited.The growth of diatoms in mountain lakes was vigorous but the growth of cyanobacteria was inhibited.Cyanobacteria grew vigorously in lakes with high salinity.The growth of cyanobacteria was relatively vigorous and the growth of diatoms was inhibited in lakes with high content of strontium.Lakes with high levels of copper and barium in the water promoted the growth of green algae.These differences may associate with the geographic difference and water characteristics of lakes.