【摘要】 汉沽生物稳定塘建成后的藻类调查结果表明，随污水的净化，藻类的群落结构发生了明显变化．从入水口至生态塘出口，藻类的种类数、种类多样性指数ｄ 值不断上升，出水口平均达２６８ 种，累积达５６ 种；ｄ 值平均为１４２ ；优势种由耐污种逐渐变为中污种；藻类的数量随污染物浓度的下降而上升，平均为４１１５５６ ×１０４ 个／Ｌ．水中的ＳＳ、ＢＯＤ５ 、ＣＯＤ、ＮＨ３Ｎ、ＰＯ４Ｐ等的浓度与藻类的种类数呈直线相关，与藻类的数量呈曲线关系，其关系可用一元二次方程表达，其中藻类数量与ＰＯ４Ｐ浓度关系曲线拟合度最好更多还原

【Abstract】 Theinvestigationsintothespatialandtemporaldistribution ofphytoplanktonicspeciesandthe change of community structuresin the Hangu multiple cellstabilization ponds were carried out during 1995 1997.Waterqualityofponds wasassesedbystudyingthealgalcommunitiesqualitativelyandquanti tatively.Theresultsshowedthatthevariationinalgalcommunitystructures wasstronglyrelatedto water qualityinthe differentgradesofpond.Sixsamplingstationsfrom firstpond(input) tolastone(output) weredistinguishableintermsofshowing differenceinthespeciesrichness,individualabundance and di versityindex andthelike.Firstpond withthe highestconcentration of COD,BOD5 ,Nand Pas wellas otherpollutants wasfound thatthere was afew species richness and low diversityindex in comparison with otherponds. Waterqualityinthelastpond(alsoasan ecologicalpond) wasobviouslyimproved due totheself purification andthis wasshown by dramaticincreaseinthenumberofspeciesand diversityin dexas wellas greatdecreaseinthetolerantpopulation’squantity.Averagely,alagalcommunity parame tersintheecologicalpond (lastpond) changed withthefollowingranges:56 speciesofalgal,1 .42 value ofdiversityindex and 41155.6×104/Lofindividualquantity.Thenumberofalgalspecies was wellcor related withtheconcentrationsof SS,BOD5 ,COD,NH3 Nand PO4 Pin the water.Thealgalquantity could beexpressed bysuch equationaslog Y= a+ bX- cX2 .更多还原