【作者】 陈莹；

【导师】 王宏伟；

【作者基本信息】 辽宁师范大学 ， 植物学， 2013， 硕士

【摘要】 2010年9月到2011年9月分四次对太子河流域的藻类植物群落组成进行了调查。共鉴定出藻类植物8门120属329种（包括21变种）。其中以硅藻最多，有36属144种，占总数的43.77%；其次是绿藻，有49属117种，占35.56%；其余蓝藻有22属39种，占11.85%；甲藻有4属6种，占1.82%；裸藻有3属11种，占3.34%；金藻有3属5种，占1.52%；黄藻有2属4种，占1.22%；隐藻最少，只有1属3种，占0.91%。底栖附着藻类28种，占总数的8.38%。在一年中，太子河流域藻类植物种数以夏季最多，有99属249种。2010年秋季藻类植物种类数有65属122种，而2011年秋季藻类植物种类数有46属76种。2010年秋季藻类植物种类数多于2011年秋季的原因是2010年夏季刚发过洪水，造成个别种类的藻类增长。春季藻类植物种类数有43属88种。太子河流域藻类植物总的细胞丰度在0.76×107cells.L-1~2.02×107cells.L-1之间。细胞丰度在夏季时最高，平均细胞丰度为7.7×104cells.L-1，秋季次之为3.9×104cells.L-1，在春季时最低，为2.9×104cells.L-1。太子河流域藻类植物的主要优势种有22种，其中蓝藻门4种，分别为巨颤藻（Oscillatoria princeps Vauch.）、小颤藻（Oscillatoria tenuis Ag.）、美丽颤藻（Oscillatoriaformosa Bory.）、螺旋鞘丝藻（Lyngbya contarta Lemm.）；绿藻门8种，分别为链丝藻（Hormidium flaccidum (Kütz.) Br.）、细链丝藻（Hormidium subtile (Kütz.) Heer.）、环丝藻（Ulothrix zonata (Web. Et Mohr) Kütz.）、池生毛枝藻（Stigeoclonium stagnatile (Haz.)Coll.）、偏生毛枝藻（Stigeoclonium subsecundum (Kütz.) Haz.）、普通水绵（Spirogyracommunis (Hass.) Kütz.）、美貌水绵（Spirogyra pulchrifigurata Jao）和维利微孢藻（Microspora willeana Lag.）；硅藻门9种，分别为偏肿桥弯藻（Cymbella ventricosaKütz.）、扁圆舟形藻（Navicula placentula (Ehr.) Grun.）、简单舟形藻（Navicula simplexKrassk.）、英吉利舟形藻（Navicula anglica Ralfs）、双头菱形藻（Nitzschia amphibianGrun.）、普通等片藻（Diatoma vulgare Bory）、变异直链藻（Melosira varians Ag.）、尺骨针杆藻（Synedra ulna (Nitzsch.) Ehrenb.）和窗格平板藻（Tabellaria fenestriata(Lyngby) Kütz.）；黄藻门1种，为小型黄丝藻（Tribonema minus (Will.) Haz.）。太子河流域藻类植物的Jaccard种类相似性指数范围在0.17-0.46之间，说明太子河流域藻类植物的季节更替明显。太子河流域藻类植物群落结构变化的主要影响因子是水温和营养盐。藻类植物多样性指数反映的水质状况较好，属于轻-中度污染状态。更多还原

【Abstract】 An ecological investigation in Taizi was made, from September2010to September2011,to analyze the algae community structure, cell abundance and the dominant species. Algaewhich contained8division,120genera,329species (including21varieties) were identifiedfrom17sampling sites. Bacillariophyta were the main part in the algae, which included36genus144species and accounted43.77%of the algae; followed by the Chlorophyta, with49genus117species and accounting35.56%of the algae; the next was Cyanophyta, including22genus39species and accounting11.85%of the algae. Pyrroptata, including4genus6species and accounting1.82%; Euglenophyta, including3genus11species and accounting3.34%; Chrysophyta, including3genus5species and accounting1.52%; Cryptophyta,including2genus4species and accounting1.22%; Cryptophyta, including1genus3speciesand accounting0.91%of the algae.Throughout the year, there is the most species of algae inSummer, reached99genus249species. There were65genus122species of the algae in theautumn of2010. However there were46genus76species of the algae in the autumn of2011.There were43genus88species of the algae in the spring.The investigation of cell abundance showed that the average cell abundance varied from0.76×107cells.L-1to12.02×107cells.L-1. The cell abundance was higher in summer andautumn, which were7.7×104cells.L-1and3.9×104cells.L-1respectively. However, it waslower in spring with2.9×104cells.L-1.There were22dominant species of algae in Taizi. The Cyanophyta had four dominantspecies, including Oscillatoria princeps Vauch.、Oscillatoria tenuis Ag.、Oscillatoria formosaBory. and Lyngbya contarta Lemm.. The Chlorophyta had eight dominant species, includingHormidium flaccidum (Kütz.) Br.、 Hormidium subtile (Kütz.) Heer.、 Ulothrix zonata (Web.Et Mohr) Kütz.、Stigeoclonium stagnatile (Haz.) Coll.、 Stigeoclonium subsecundum (Kütz.)Haz.、 Stigeoclonium subsecundum (Kütz.) Haz.、 Spirogyra pulchrifigurata Jao andMicrospora willeana Lag.. The Bacillariophyta had nine dominant species, includingCymbella ventricosa Kütz.、Navicula placentula (Ehr.) Grun.、Navicula simplex Krassk.、Navicula anglica Ralfs、Nitzschia amphibian Grun.、 Diatoma vulgare Bory、Melosiravarians Ag.、 Synedra ulna (Nitzsch.) Ehrenb. and Tabellaria fenestriata (Lyngby) Kütz..The Cryptophyta had only one dominant specie, it is Tribonema minus (Will.) Haz.. Species Jaccard index of the algae varied from0.17to0.46between every two season.Therefore both algae community structure and the cell abundance have obvious seasonalvariation.The main influence factor of algae community structure in Taizi is watertemperature and nutrient. The evaluation indicated that the water quality of the taizi rivervalley was light-moderate eutrophication．更多还原