松花江底栖动物分布规律及与理化评价差异研究

Study on the Distribution Law and the Difference with Physicochemical Evaluation of Zoobenthos in Songhua River

2012—2015年对松花江干流11个断面21个点位进行底栖动物群落监测,在7种单一指数评价的基础上运用简单的叠加法进行综合评价,并与常规理化监测与评价进行了比较。结果显示,与2012年相比,2013年松花江干流底栖动物物种较丰富,各点位评价结果有所提升;2015年摆渡镇-同江段多为清洁等级,水环境生态质量稳中趋好,下游改善明显。结果显示,生物学评价与理化评价存在明显的差异,在水质改善的过程中生物学评价更灵敏、更显著。

The zoobenthos species in 21 sites of the 11 sections in Songhua River mainstream were sampled in 2012-2015. They were evaluated with 7 single indices,and then a simple superposition method was used to make a comprehensive evaluation,which was compared with the conventional physicochemical monitoring and evaluation. The results showed that compared with 2012,zoobenthos species in Songhua River mainstream were rich,and the evaluation results were improved in 2013. In 2015,the Baiduzhen-Tongjiang section was clean grade; the ecological quality of water environment was stable and better,which was significantly improved in the downstream. There are significant differences between biological evaluation and physicochemical evaluation. The biological evaluation is more sensitive and significant in the process of water improvement.