摘要
为研究酸沉降对水生生态系统的影响，１９９１年至１９９２年间，对地处我国重酸雨区域的重庆市郊６个水体中的藻类进行了比较研究，结果表明，绿藻门的种类最多，占种类总数的５０％以上，其次是蓝藻或硅藻。藻类的细胞密度、生物量和叶绿素ａ，在酸化水体中（ｐＨ值＜５．０）分别为２３．３～４９．９万个／Ｌ，０．５９～１．０５ｍｇ／Ｌ和０．６５～３．０１ｍｇ／ｍ３；在轻度酸化水体（６．０＞ｐＨ值＞５．０）分别为４３３．９～６８０．０万个／Ｌ，６．６～２１．７５ｍｇ／Ｌ和１４．６６～２５．１９ｍｇ／ｍ３。三项指标均随水体酸度的增加而减少。酸化水体中的藻类生长潜力（ＡＧＰ）很弱，低ｐＨ值和可给态磷的不足是造成ＡＧＰ低的主要限制因素。
The phytoplankton in acid waters of Chongqing City was investigated. Green algae is the most important group representing more than 50% of the total species. The subdominance of the algae community is bluegreen algae or diatoms. The total cell density, biomass and chlorophyll a concentration are 2.33～4.99×106 ind./L, 0.95～1.05mg/L and 0.65～3.01mg/m3 respectively in acid waters (pH<5.0 ):and 43.39～68.00 ×106 ind/L, 6.6～21,75mg/L and 14.66～25.19mg/m3 in less acid waters (pH>5.0).It seems that these three parameters determined are all reduced with decrease in pH value. The results of AGP Test indicates that the AGP of acid waters is very low. Low pH and availability of phosphorus are the most important factors resulting in low AGP.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1994年第5期350-355,共6页
China Environmental Science
关键词
水污染
酸化
水体
藻类
生长潜力
水生生物
Acid waters
Phytoplankton
Community structure
Chlorophyll a
Algae growth potential.
