2011 年 8 月和 10月分别对滦河水体浮游植物进行了采样和分析。结果表明滦河浮游植物共发现浮游植物 8 门 99 种, 物种多样性较高。浮游植物群落组成以蓝藻门为主, 滦河水体蓝藻门细胞密度较大, 所占比例最高, 其次 为绿藻门和硅藻门。浮游植物细胞密度和生物量均空间分布不均, 其数值沿程变化趋势较一致, 上游较中下游低, 显示上游水体富营养化水平较低, 而中下游富营养化水平较高。从细胞密度和生物量评价, 上游富营养化水平较 低, 而中下游富营养化水平较高。结合 Pielou 指数和 Simpsen指数评价滦河水体污染状况, 表明上游大部分样点为 寡污型水体, 下游大部分样点为中污型水体。浮游植物指示污染类型分析表明, 污染指示种类污染 10 月较 8 月多。 本研究对滦河水体污染状况及水生态修复具有重要的参考价值。

The phytoplankton diversity in the Luanhe River was sampled and analyzed in August and October 2011. The results showed that( 1) a total of 99 taxa with 79 genera and 8 phyla are identified, indicating a high diversity of species; (2) the domi 2 nant group is blue 2green algae in the phytoplankton community composition. T he highest proportion of cell density is blue 2green algae, followed by green algae and diatoms; ( 3) Cell density and biomass of phytoplankton have unevenly spatial distribution, and their changes show the same trend along the river. Both values are lower in the upstream but higher in the downstream, in2 dicating a lower level of eutrophication in the upstream while a higher level of eutrophication in the downstream; ( 4) Based on the water pollution analysis using the Pielou index and Simpsen index, the upstream has light level of pollution whereas the downstream has middle level of pollution; and(5) the pollution types of phytoplankton indicators suggest that the pollution indi 2 cator species are higher in October than those in August. T his study provides important reference for the pollution status and a 2 quatic ecosystem restoration in the Luanhe River.

国家国际科技合作专项资助( 2013DFA71340) ; 国家水体污染控制与治理科技重大专项( 2012ZX072032002) ; 水利部/ 9480项目 (201412; T G1408)