大型溞(Daphnia magna)控藻生态修复技术在典型南亚热带湖泊中的应用

Daphnia Magna(Daphnia magna)Application of Algae Control of Ecological Restoration Technology in Typical Subtropical Lakes

以典型南亚热带富营养化水体——海珠湿地景观水体和荔湾湖为例,采用大型溞摄食藻类、有机悬浮物颗粒迅速提高水体透明度,恢复沉水植物群落,逐步完善修复系统的结构和功能。结果表明:修复后海珠湿地景观水体主要水质指标NH_3–N、TN、TP和CODcr分别在1mg/L、1.5mg/L、0.01mg/L和10mg/L以下,SD在2m左右;荔湾湖修复后水质也基本保持在地表Ⅲ水标准(GB3838–2002)。实践证明,大型溞控藻生态修复技术能够适应南亚热带富营养化水体,效果显著,这也为典型华南富营养化水体的生态修复提供一种有效的治理技术。

Haizhu Wet landscape waterbody and Liwan Lake, two successful cases of typical waterbodies in South Subtropic were restored.And macrophytc community was established efficiently during restoration because of high transparency （SD） increasedqutckly by Daphnia magna which filtered with algae and organic suspended particles, and then the structure and function of recoverysystem improved gradually.Results showed that the main quality indexes of Haizhu wetland such as NH3-N, TN, TP and CODer werebelloxed ling/L, 1.5/L, 0.01mg/L and 10mg/L, respectively, and SD was about 2m.Water quality of Liwan Lake after restorationwas maintained the surface IIl water standards （GB3838-2002）, basically.It is proved the ecological restoration technology driven byDapbnia magna can adapt to the eutrophic waterbody in south subtropic completely, which is also provides an effective technology forthe ecological restoration ofeutrophica waterbody in South China.