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引用本文:郭跃华,陈修康,张建林,韩博平,彭亮.广东省高州水库水华过程中蓝藻群落的动态特征.湖泊科学,2011,23(4):527-533. DOI:10.18307/2011.0406
GUO Yuehua,CHEN Xiukang,ZHANG Jianlin,HAN Boping,PENG Liang.Dynamics of cyanobacterial community during algae blooming in Gaozhou Reservoir of Guangdong Province,southern China. J. Lake Sci.2011,23(4):527-533. DOI:10.18307/2011.0406
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广东省高州水库水华过程中蓝藻群落的动态特征
郭跃华1, 陈修康1, 张建林1, 韩博平1,2, 彭亮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, 广东省水利厅-暨南大学, 广州 510632
摘要:
2009年1-4月, 高州水库发生了规模较大的粘质鱼腥藻(Anabaena mucosa)水华, 最高藻细胞密度达3.4×107cells/L, 并在2010年的同一时期再次出现, 这也是粘质鱼腥藻首次在广东省水库水体形成水华.为了解该水库蓝藻水华发生的特点, 本文于2009年8月到2010年7月对高州水库进行了逐月采样, 分析了水华发生期间蓝藻群落结构特征及动态.蓝藻群落结构在枯水期与丰水期差异显著, 蓝藻细胞丰度枯水期较高, 蓝藻优势种为粘质鱼腥藻, 并形成蓝藻水华, 丰水期蓝藻细胞丰度较低.在枯水期降雨较少, 水库水位与库容较低, 水力滞留时间急剧增加, 水体稳定, 有利于藻类的大量繁殖与生物量积累.同时水体透明度下降, 水温下降, 更有益于对低温有较好适应能力的种类—粘质鱼腥藻成为优势种并形成水华.蓝藻生物量与水温有很强的负相关性, 表明粘质鱼腥藻能够适应低温.在丰水期, 表层水温增加, 水体分层加剧, 同时降雨大幅度提高, 水位显著升高, 水华微囊藻的优势度增加, 取代了粘质鱼腥藻成为最主要的优势种, 但由于总丰度下降, 蓝藻水华消失。
关键词:  蓝藻水华  粘质鱼腥藻  蓝藻群落  高州水库
DOI:10.18307/2011.0406
分类号:
基金项目:广东省水利厅科技计划项目和国家自然科学基金项目(U0733007)联合资助
Dynamics of cyanobacterial community during algae blooming in Gaozhou Reservoir of Guangdong Province,southern China
GUO Yuehua1, CHEN Xiukang1, ZHANG Jianlin1, HAN Boping1,2, PENG Liang1,2
1.Institute of Hydrobiology, Jinan University, Guangzhou 510632, P.R.China;2.Control and Mitigation Center of Cyanobacteria Blooms of Guangdong Province, Water Resources Department of Guangdong Province and Jinan University, Guangzhou 510632, P.R.China
Abstract:
A cyanobacterial bloom(dominated by Anabaena mucosa) in Gaozhou Reservoir was firstly reported from January to April in 2009, occurred again in 2010.Its maximum cell density reached 3.4×107 cells/L.To understand the characteristics of the cya-nobacterial blooms,the community structure and dynamics of cyanobacteria were investigated monthly from August 2009 to July 2010.There was a significant difference in species composition of cyanobacteria between dry season and flood season in the reser-voir.Cell density in dry season was higher than that in flood season when Anabaena mucosa formed cyanobacterial bloom.This phe-nomenon may attribute to the beneficial conditions to algal growth and accumulation,e.g.low precipitation,low water level and low storage capacity,but hydraulic retention time prolonged and thermal stability increased.Moreover,the decreased water trans-parency and lowering temperature would contribute to Anabaena mucosa turning into the dominant species and to form cyanobacterial blooms.Strong negative correlation between water temperature and cyanobacterial biomass suggested that Anabaena mucosa was a-daptable to low water temperature.In the flood season,increasing of precipitation resulted in high water level,and thermal stratifi-cation occurred in vertical column of the water.Microcystis flos-aquae was dominated in the algal community gradually instead of An-abaena mucosa because of the water stratification,but the bloom disappeared with a dramatic decrease of total cyanobacteral bio-mass.In conclusion,the cyanobacterial bloom in Gaozhou Reservoir was closely related to water temperature and precipitation.
Key words:  Cyanobacterial bloom  Anabaena mucosa  cyanobacterial community  Gaozhou Reservoir
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