江苏湖泊草藻初级生产潜力的归一化模型研究

Study on Normalized Model of Macrophytes-cyanobacteria Primary Production Potential in Lakes of Jiangsu Province

以太湖的梅梁湾、胥口湾和东太湖为研究对象,利用现场检测、野外调研、数据挖掘和模型推导等研究方法,对太湖草藻转化关系系数进行深入的研究,研究结果表明,太湖整体一直处于富营养化的水平,且梅梁湾、胥口湾和东太湖三个湖区近年来的营养水平呈现出上升的趋势;草型湖区水体中TP含量在0.02-0.13mg/L之间变化时,水生植物的生物量与水体中TP含量线性正相关;草藻归一化系数Ki随水体中TP含量线性增长;存在一个水生生物量的阈值区间[2 882g/m^2,4 990g/m^2],利用这个阈值区间可以简单快速地判定草藻归一化系数Ki的大小,同时这一阈值也是判定草型湖泊是否呈现富营养化特征的重要依据。得出的结论为构建富营养化湖泊的草藻归一化处理模型提供重要的理论参考。

Taking Meiliang Bay,Xukou Bay and Eastern Lake Taihu in Taihu Lake as study target,the transformation relationship coefficient in Taihu Lake watershed is deeply investigated by field detection,field investigation,data mining and model inference.The main results are that the Taihu Lake is always in eutrophic level,and in recent years increase trends have been observed in Meiliang Bay,Xukou Bay and Eastern Lake Taihu.The positive correlation between the biomass of macrophytes and aqueous total phosphorus（TP）is observed when TP concentrations vary from 0.02 mg/L to 0.13 mg/L in macrophytes dominated lake region.The macrophytes-cyanobacteria normalization coefficient Kiincreases linearly with aqueous TP concentrations.The threshold of[2 882g/m2,4 990g/m2]is used to judge Kisimply and rapidly,and whether macrophytes dominated lakes are eutrophic is also judged by this threshold.The conclusion can provide important theoretical references for the foundation of normalized model of macrophytes-cyanobacteria primary production potential in eutrophic lakes.