【摘要】 于2011年枯水期、丰水期对辽宁省北部汎河10个断面的着生藻类的种类、生物密度进行了调查。结果表明:监测到着生藻类6门8纲16目25科47属,其中枯水期监测到35属,丰水期监测到32属;汎河着生藻类群落主要由硅藻组成,其次是蓝藻和绿藻;枯水期汎河各断面着生藻类生物密度平均为11.92×105个·cm-2,丰水期的生物密度平均为3.75×105个·cm-2;枯水期汎河着生藻类的优势种主要有肘状针杆藻(Synedra ulna)、尖针杆藻(S.acus)、短线脆杆藻(Fragilaria brevistriata)、钝脆杆藻(F.capucina)、普通等片藻(Diatoma vulgare)、近缘桥弯藻(Cymbella affinis)、偏肿桥弯藻(C.ventricosa)、箱形桥弯藻(C.cistula);丰水期优势种主要有美丽颤藻(Oscillatoria formosa)、两栖颤藻(O.tenuis)、席藻(Phormidium sp.)、肘状针杆藻(S.ulna)、尖异极藻(Gomphonema acuminatum)、扁圆卵形藻(Cocconeis placentula);Shannon多样性指数评价显示汎河水质为轻污染。更多还原

【Abstract】 In dry and rainy seasons of 2011,an investigation was conducted on the species and density of periphytic algal communities in ten sections of Fanhe River located in northern Liaoning Province of Northeast China.A total of 47 genera,25 families,16 orders,8 classes,and 6 phyla were identified,with 35 genera in dry season and 32 genera in rainy season.The periphytic algal communities in the River were mainly consisted of diatoms,followed by green algae and blue algae.The average density of the algae was 11.92×105 cell·cm-2 in dry season and 3.75×105 cell·cm-2 in rainy season.The dominant species in dry season were Synedra ulna,S.acus,Fragilaria brevistriata,F.capucina,Diatoma vulgare,Cymbella affinis,C.ventricosa,and C.cistula,and those in rainy season were Oscillatoria formosa,O.tenuis,Phormidium sp.,Synedra ulna,Gomphonema acuminatum,and Cocconeis placentula.The evaluation with Shannon diversity index indicated that the water quality of the River was of slight pollution.更多还原