Abstract
There are few natural lakes in South China, and thus, reservoirs play an important role in supplying drinking water and water for agricultural and industrial uses. Our studies show that Cyanobacteria are widespread in the reservoirs of Guangdong Province; common genera are Microcystis, Pseudanabaena, Cylindrospermopsis, Merismopedia, Chroococcus, Gloeocapsa, Dactylococcopsis, Anabaena, Raphidiopsis and Gloeothece. In summer and autumn, Cyanobacteria become dominant in eutrophic reservoirs and their relative abundance can reach up to 80%. Many species produce toxins, among which the environmentally persistent, hepatotoxic microcystins (MCs) are most prominent. A survey in 2003 showed that, although microcystins were common in Guangdong Reservoirs, their concentration was low. A survey of six reservoirs in 2004 revealed that relatively high MC concentrations appear in summer and autumn; moreover, MC concentrations increase earlier than in temperate regions and persist longer. The MC content during cyanobacterial blooms ranged from 175.8 to 2478.9 μg/g DW and of Microcystis strains ranged from 16.8 to 982.3 μg/g DW. Both implied differentiation between toxin-producing Microcystis.
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Acknowledgments
Grant from NSFC (31070416) to Dr. L. Lei was appreciated.
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Lei, L., Lin, S., Hu, R. (2012). Cyanobacteria and Cyanotoxins in Reservoirs of South China. In: Han, BP., Liu, Z. (eds) Tropical and Sub-Tropical Reservoir Limnology in China. Monographiae Biologicae, vol 91. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2007-7_7
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DOI: https://doi.org/10.1007/978-94-007-2007-7_7
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