酸化水体中的浮游生物及其与主要化学因子的关系

PLANKTON OF ACIDIFIED WATERS IN RELATION TO MAIN CHENICAL FACTORS

１９９１－１９９２年对重庆市郊若干酸化水体的生物待正与理化参数进行综合研究的结果表明，藻类的种类数、细胞密度、生物量和叶绿素ａ含量以及浮游动物的种类数等均与呈正相关，但与Ｈ＋和总Ａｌ浓度呈负相关。浮游动物的个体密度在酸化水体中明显下降，但是鱼的捕食作用掩盖了其与上述化学参数之间的相关性。水体中Ｈ＋和总Ａｌ浓度的增加在很大程度上对浮游生物产生了不利影响，水体的透明度、总Ａｌ．ＴＰ和ＳＯ与ｐＨ的相关性十分明显，ｒ值分别为－０．６３７５、－０．６８６８、０．７５６１和０．７３２３。

An integrated studies on biological aspects and several physico-chemical parameters in acidified waters have been conducted at the outskirts of Chongqing City during 1991-1992.There were obvious positive correlations between the algal parameters(species numbers, cell density,biomass and Ch1.a content)and TP or/and SO, but nega- tive correlations between algal abundance and H￣+。or/and total Al concentration.As regards to zooplankton,remakable positive correlation between species numberand SO or/and TP, but negative correlation between species number and H+ orand total Al were found. Hardly any correlation was found between the indivi-dual density of zooplankton and these chemical factors,The individual density ofzooplankton in the less acid waters without fishes were often higher than those inthe normal waters with a higher fish crop. The correlation betweee pH and water transparency,SO and total aluminum concentration was also very notable.