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湖泊科学  2011 

滇池流域入湖河流丰水期着生藻类群落特征及其与水环境因子的关系

DOI: 10.18307/2011.0107

Keywords: 滇池流域,着生藻类,水环境因子,空间分布格局,丰水期

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Abstract:

着生藻类是重要的水环境指示生物,其物种组成、生物密度以及多样性指数等群落特征被广泛用于监测和评价人为活动干扰对水生生态系统所造成的影响.本文根据滇池流域29条人湖河流2009年7-8月着生藻类调查数据,以及2008年9月至2009年8月逐月水环境指标监测数据,通过运用等级聚类分析、因子分析和典型对应分析,来探讨滇池流域入湖河流丰水期着生藻类群落特征与水环境因子的关系及其空间分布格局,以期为滇池流域水环境质量评价和流域综合管理提供基础.结果表明,滇池流域人湖河流在调查期间共检出着生藻类5门18科24属,其中硅藻门7科10属,绿藻门6科7属,蓝藻门2科4属,金藻门2科2属,裸藻门l科l属,丰水期着生藻类的群落结构以硅藻门的舟型藻属为优势属;滇池流域入湖河流丰水期着生藻类生物密度、舟型藻属生物密度及其百分比的空间分布格局均为流域北部入湖河流>南部>东部;TN、NH3-N和TP等无机营养盐指标是影响滇池流域入湖河流丰水期着生藻类群落特征的主要水环境因子,其综合污染状况的空间分布格局也为流域北部人湖河流>南部>东部。

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