唐鱼自然群体栖息地水环境调查

于2005年6月至12月,每两个月一次调查从化市鹿田镇唐鱼自然群体栖息地的水环境,分析了水质、底泥以及浮游生物数量和组成特点。结果表明,栖息地水体6月,12月水质较好,8月总氮含量偏高,10月总氮、总磷含量都高,而COD值一直都较高。底泥的凯氏氮和有机质含量高,而磷含量相对较低。8月浮游植物密度达到最大值,其群落组成特点是,硅藻种数多,蓝藻、绿藻种数少,而数量上,硅藻少,蓝藻多,绿藻次之。8月浮游动物密度大,种数多,其他月份数量和种数相对较少。

Natural habitat of Tanichthys albonubes

The habitat of a rare minnow Tanichthys albonubes in Conghua town, Guangdong province was investigated form June 2005 to December 2005, and water quality, sediment and plankton were quantified. The water quality of the habitat was better in June and December than in other months. Total nitrogen in water bodies was high in August, and high concentration of total nitrogen and total phosphorus appeared in October. The COD was high in all months. The contents of nitrogen and organism in sediment were high, however, the contents of phosphorus was low. The max density of phytoplankton and zooplankton in water bodies appeared in August. In other months the quantity and species were low. There were fewer species but larger quantity in both of Cyanophyta and Chlorophyta than diatoms.