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引用本文:陈修康,郭跃华,冯喻,张华俊,韩博平,肖利娟.特大洪水对浮游植物群落及其演替的影响——以广东高州水库为例.湖泊科学,2014,26(1):137-146. DOI:10.18307/2014.0117
CHEN Xiukang,GUO Yuehua,Feng Yu,ZHANG Huajun,HAN Boping,XIAO Lijuan.Impact of great flood on phytoplankton assemblages and their succession:A case study of Gaozhou Reservoir, Guangdong Province. J. Lake Sci.2014,26(1):137-146. DOI:10.18307/2014.0117
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特大洪水对浮游植物群落及其演替的影响——以广东高州水库为例
陈修康1, 郭跃华1, 冯喻1, 张华俊1, 韩博平1,2, 肖利娟1,2
1.暨南大学水生生物研究所, 广州 510632;2.广东省水库蓝藻水华防治中心, 广州 510632
摘要:
洪水事件能够在短时间内对生态系统的物理与生物过程产生重大影响,从而导致浮游植物群落结构的快速演替.2010年9月,广东省大型水库——高州水库发生特大洪水.为了解洪水的生态效应,于2010年1月-2011年12月对高州水库湖沼学变量和浮游植物进行了调查研究.特大洪水期间,高州水库流域内大量泥沙等颗粒物进入水体,将原有有机物相对较多的沉积物覆盖,有助于减少营养盐的底泥释放,洪水后次年春季枯水期水体营养盐浓度明显降低(尤其是磷,总磷浓度低于0.01 mg/L).洪水过后水体中悬浮物的组成改变,在接下来的水体混合期间无机颗粒物的再悬浮导致水体透明度显著降低,但次年水库整体的透明度升高,浮游植物生物量降低.洪水事件导致的水体理化环境的改变使水库浮游植物群落结构改变,由洪水前以群体蓝藻和大个体绿藻(H1和NA功能类群)为优势类群的群落转变为洪水后以中心纲浮游硅藻和甲藻(A、B和LO功能类群)为优势类群的群落,而以往枯水期常有发生的粘质鱼腥藻等蓝藻水华在洪水后春季枯水期没有出现.
关键词:  特大洪水事件  浮游植物功能类群  湖沼学变量  演替  高州水库
DOI:10.18307/2014.0117
分类号:
基金项目:广东省水利厅科技创新项目(2009-22);NSFC广东联合基金项目(U0733007)联合资助
Impact of great flood on phytoplankton assemblages and their succession:A case study of Gaozhou Reservoir, Guangdong Province
CHEN Xiukang1, GUO Yuehua1, Feng Yu1, ZHANG Huajun1, HAN Boping1,2, XIAO Lijuan1,2
1.Institute of Hydrobiology, Jinan University, Guangzhou 510632, P. R. China;2.Guangdong Center for Control and Prevention of Reservoir Cyanobacterial Blooms, Water Resources Department of Guangdong Province and Jinan University, Guangzhou 510632, P. R. China
Abstract:
To identify the impact of a great flood event on phytoplankton assemblages and their succession in Gaozhou Reservoir, limnological variables and phytoplankton were investigated from January, 2010 to December, 2011. During flood, a mass of particles were flushed into the reservoir and overlaid the original surface sediment, which suppressed nutrients releasing from sediment. Nutrients concentration, especially phosphorus sharply decreased, and total phosphorus concentration was below 0.01 mg/L. After the flood event, the composition of suspended particles were changed, and water transparency decreased during the next mixing period because of the decreased resuspension of inorganic particles and phytoplankton biomass. The phytoplankton community structure rapidly responded to the significant change in the physical environmental variable. Dominant phytoplankton groups changed from colonial blue-green and large unicell Chlorophyta (Coda H1 and NA) to planktonic centric diatoms and dinoflagellates (Coda A, B and LO). Anabaena mucosa which caused blooms yearly in every spring dry season could not be detected after the flood event.
Key words:  Great flood event  phytoplankton functional groups  limnological variables  succession  Gaozhou Reservoir
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