浑河水系着生藻类的群落结构与生物完整性  

Community structure and biological integrity of periphyton in Hunhe River water system of Liaoning Province, Northeast China

作　　者：殷旭旺[1,2] 张远[3] 渠晓东[3] 刘颖[1,2] 李庆南[1,2] 孟伟[3] 

机构地区：[1]大连海洋大学生命科学与技术学院,辽宁大连116023 [2]辽宁省水生生物学重点实验室,辽宁大连116023 [3]中国环境科学研究院流域水生态保护技术研究室,北京100012

出　　处：《应用生态学报》2011年第10期2732-2740,共9页Chinese Journal of Applied Ecology

基　　金：国家"水体污染控制与治理"重大科技专项;流域水生态功能评价与分区技术课题(2008ZX07526-001)资助

摘　　要：以辽宁省浑河水系为研究范例,调查了全流域范围内62个样点的着生藻类群落和水环境理化特征,并应用着生藻类生物完整性评价指数(P-IBI),结合栖息地环境质量评价指数(QHEI),对浑河流域水生态系统进行健康评价.结果表明:浑河水系着生藻类群落结构具有明显的空间异质性,浑河水系的采样点可划分为4组(Group),不同组间的着生藻类群落结构、物种多度、密度和香农多样性指数均存在明显差异.典范对应分析(CCA)结果显示,驱动浑河着生藻类群落结构形成的水环境因子为铵氮(NH4+-N)和活性磷(PO43--P).P-IBI和QHEI在浑河水系某些河段上的评价结果有较大出入,但从全流域尺度上看,P-IBI和QHEI的评价结果基本一致,表现为浑河上游的苏子河健康状况较好,而上游的浑河以及中下游的浑河干流健康状况较差.Taking the Hunhe River water system in Liaoning Province of Northeast China as a case, this paper investigated the community structure of periphyton and the physical and chemical characteristics of water environment at 62 sampling sites, and, by using the biological integrity index of periphyton （P-IBI） and the habitat environment quality index （QHEI）, a health assessment on the aquatic ecosystem of the water system was conducted. There was a great spatial heterogeneity in the periphyton community structure, and the sampling sites could be divided into 4 groups, with significant differences in the community structure, species richness, density, and Shannon diversity index among the groups. Canonical correspondence analysis （CCA） showed that ammonia nitrogen （NH4＋-N） and dissolved phosphorus （PO43--P） were the main water environment factors driving the formation of the periphyton community structure in the water system. The health assessment of the water system based on P-IBI and QHEI was basically in consistency, though the assessment of several reaches had large discrepancy. Overall, the Suzi River at the upper reaches of the water system had a better health status, while the upper reaches of Hunhe River and the main stream of Hunhe River at its middle and lower reaches were worse in health.

关 键 词：生物完整性指数 栖息地环境质量评价 典范对应分析 主成分分析 群落结构 

分 类 号：Q948.8[生物学—植物学]