Microcystin (MC) problem made more and more care about in China, intercellular MC (Int-MC) and cellular MC (Cel-MC) were important contents to reflect the producing-MC ability by cyanobacteria and by lakes. To study the correlations between Int-MC, Cel-MC concentration and biological and environmental factors, eight cyanobacterial blooming lakes were studied in the middle and lower reaches of the Yangtze River. Microcystin-RR (MC-RR) and Microcystin-LR (MC-LR) were the primary toxin variants in our data. From the linear correlations between MC and environmental factors, cellular-YR had significant correlation with most of chemical factors except total nitrogen (TN) and the ratio of total nitrogen and total phosphorus (TN/TP), most intracellular MC analogues had significant correlations with total dissolved nitrogen (TDN), ammonium (NH +4 ), nitrite (NO –2 ), TP, total dissolved phosphorus (TDP), Microcystis. From the canonal correspondence analysis, Int-MC concentrations were closely related with the chemical and biological factors, such as TP, total organic carbon (TOC), chlorophyll a (Chl a), Microcystis biomass, et al. While Cel-MC contents, especially Cel-RR and Cel-LR, were closely related with light environmental in the lakes such as water depth and transparence.
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This work was supported by a key project of the Chinese Academy of Sciences (Grant No. KZCX1-SW-12) and by a fund from National Natural Science Foundation of China (Grant No. 30225011). We thank Prof. Wang H Z for the guidance and Wu A P, Wang H J, Cui Y D, Pang B Z, Wang Z X and Liang X M for assistance in sampling and experimental methods.
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Wu, S., Wang, S., Yang, H. et al. Field Studies on the Environmental Factors in Controlling Microcystin Production in the Subtropical Shallow Lakes of the Yangtze River. Bull Environ Contam Toxicol 80, 329–334 (2008). https://doi.org/10.1007/s00128-008-9378-9
- Shallow lakes
- The Yangtze River