东湖磷酸酶活力及其生态学意义研究

A Study on Phosphatase Activity and Its Ecological Significance in the East Lake

本文对东湖磷酸酶活力(PA)的来源,不同湖区活力水平的比较,及其与主要环境因子的关系作了初步研究。结果表明,东湖水柱中磷酸酶活力主要来自藻类,底泥中则主要来自细菌;在东湖磷浓度波动范围内,磷对碱性磷酸酶活力(ALPA)无明显抑制,实验室条件下相当于环境水平的磷浓度不能抑制PA;光照促进藻类PA的增加;溶解氧有利于藻类PA提高,对细菌PA则相反。

Thg source of phosphatase activity (PA) in different regions in the East Lake, Wuhan City, is compared, and the relationships between the environmental factors and PA are studied. The result show that phytopiankon contributes most to PA in lake water just as bacterium does to PA in bottom sediment. Within the range of phosphate concentration in the lake, alkaline phosphatese is not repressed obviously by phosphorus. In the experiments, phosphate can not refrain PA, while light and dissolved oxygen will promote algal PA, but not do so to bacterial PA.