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Spatial and temporal variations in cyanobacteria and microcystins in aha reservoir,Southwest China

Journal of Oceanology and Limnology 2018年第4期36卷 1126-1131页

作者： HAN Mengshu LI Qiuhua CHEN Hailong XIAO Jing JIANG Fan Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province Guizhou Normal University Guiyang 550001China

Toxic cyanobacteria(TCB) are well-known worldwide for their adverse impacts on humans. Species compositions and seasonal variations of TCB in reservoirs depend on interactions between physical and chemical factors. This study was conducted to evaluate the water quality in the aha reservoir, Southwest China, focusing on cyanobacteria and cyanotoxins. Water samples were collected weekly or biweekly from May to September of 2015 and used to delineate temporal variations in density and distribution of toxic cyanobacteria and cyanotoxins in the reservoir. Toxic cyanobacteria identified consisted of Aphanizomenon flos-aquae, Pseudanabaena limnetica, Cylindrospermopsis sp., and Microcystis sp., with Aphanizomenon flos-aquae and Pseudanabaena limnetica being the most common and significant toxic genera. The total biomass of cyanobacteria was 17.0 mg/L. Identification and quantification of microcystin variants were conducted by high performance liquid chromatography(HPLC) using a system equipped with a photodiode array detector. Microcystin levels were between 0–3.0 μg/L, MC-RR was around 0–3.0 μg/L and MC-LR was approximately 0–0.9 μg/L. Overall, the results of this study indicate that the investigated reservoirs should be monitored regularly to minimize potential health risks to the human population.

关键词： Cyanobacteria Aphanizomenonflos-aquae Microcystin-LR Microcystin-RR aha reservoir

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Study on the Relationship between Chlorophyll-a and Environmental Impact Factors in Deep reservoir in Karst Areas——Taking aha reservoir for Example

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Meteorological and Environmental Research 2011年第3期2卷 49-52页

作者： XIA Pin-hua,LIN Tao,LI Cun-xiong,XUE Fei,ZHANG Bang-xi Key Laboratory of Mountainous Environmental Information System and Ecological Environment Protection in Guizhou Province,Guizhou Normal University,Guiyang 550001,China

[Objective] The aim was to study the relationship between chlorophyll-a and environmental impact factors in deep reservoir in Karst Areas.[Method] Taking aha reservoir for example,the changes of chlorophyll-a content and its relationship with environmental impact factors were researched,and the water quality of aha reservoir was assessed by means of modified Carlson trophic state index.[Result] Chlorophyll-a content in aha reservoir was higher in March,April,May and September and lower from June to August,and there was obvious seasonal variation,namely its variation trend was spring>summer>autumn>*** addition,chlorophyll-a content showed extremely significant correlation with transparency and dissolved oxygen (Paha reservoir which was in moderate trophic state in August,October and November and eutrophic state in other months.[Conclusion] The study could provide scientific reference for discussing the mechanism of lake eutrophication.

关键词： aha reservoir Chlorophyll-a Environmental factors Trophic state index China

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The concentration and distribution of different mercury species in the water columns and sediment of aha Lake

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Acta Geochimica 2006年第S1期 154-154页

作者： Weiyang BAI, Xinbin FENG, Xuewu FU, Tianrong HE, Guangle QIU 1 State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

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