摘要
2004年调查了广东省境内的新丰江水库和契爷石水库的蓝藻分布特征。结果表明:共检测到蓝藻18属,绝大多数为丝状体和群体种类。常见属有假鱼腥藻(Pseudan-abaena)、湖生蓝丝藻(Limnothrix)、微囊藻(Microcystis)和蓝纤维藻(Dactylococcopsis)。新丰江水库和契爷石水库蓝藻细胞密度分别为4～249和1911～114228cells·ml-1,富营养化的契爷石水库蓝藻细胞密度比贫营养型的新丰江水库高出3个数量级;2座水库最高蓝藻细胞密度均出现在夏季,温度是引起2座水库蓝藻细胞密度的季节性变化的主要因素;在新丰江水库,微囊藻是优势蓝藻种类之一,相对丰度35%～97%,夏季细胞密度高于其它季节;在契爷石水库,虽然微囊藻细胞密度比新丰江水库高出1个数量级,但其相对丰度不超过3%;假鱼腥藻和湖生蓝丝藻是契爷石水库的优势蓝藻种类,多数情况下相对丰度超过50%;水体稳定性和由透明度主导的水体光照条件的差别可能是导致两座水库蓝藻由不同生活类型的种类占优势的主要原因。
The distribution patterns of Cyanophyta in two subtropical reservoirs, Xinfengjiang Reservoir and Qieyeshi Reservoir, in Guangdong Province were investigated bimonthly in 2004. A total of 18 genera were identified, and most of them were filamentous and colonial. The most common genera were Pseudanabaena, Limnothrix, Microcystis and Dactylococcopsis, and the Cyanophyta abundance was 4 -249 cells · ml^-1 in Xinfengjiang Reservoir and 1911-114228 cells · ml^-1 in Qieyeshi Reservoir. In eutrophic reservoir, Qiyeshi Reservoir, the abundance of Cyanophyta was several orders higher than that in oligotrophic reservoir, Xinfengjiang Reservoir. In both of the reservoirs, the maximum abundance occurred in summer, and temperature was the possible factor controlling the seasonal variation of Cyanophyta abundance. In Xinfengjiang Reservoir, Microcystis was one of the dominant Cyanophyta species, which contributed 35%-97% of the total abundance, and its maximum abundance was found in summer. In Qiyeshi Reservoir, Microcystis abundance was one order higher than that in Xinfengjiang Reservoir, but its relative abundance was lower than 3%. Pseudanabaena and Limnothrix were the dominant Cyanophyta species, and contributed more than 50% of the total Cyanophyta abundance most of the time. The stability of water body and the underwater light condition driven by water transparence seemed to be the key factors inducing Cyanophyta dominated by different ecotypes of species in the two reservoirs.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第7期1027-1033,共7页
Chinese Journal of Ecology
基金
广东省水文局重点项目(GDSW0302)
广东省科技攻关资助项目(2KM06103S)
关键词
蓝藻
营养水平
水库
Cyanophyta
trophic level
reservoir.
