Seasonal dynamics of water bloom-forming Microcystis morphospecies and the associated extracellular microcystin concentrations in large, shallow, eutrophic Dianchi Lake

Wu, Yanlong; Лин, Ли; Gan, Nanqin; Zheng, Lingling; Ma, Haiyan; Shan, Kun; Liu, Jin; Xiao, Baihua; Song, Lirong

doi:10.1016/j.jes.2014.06.031

Cited by 78 publications

(28 citation statements)

References 40 publications

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“…Although the MC content of the concentrated filtrates of some Microcystis strains used in this study was high, the pure MC-LR did not show any inhibitory effect on Aphanizomenon flos-aquae. In addition, the MC content of Lake Dianchi has also been demonstrated to be low (Wu et al, 2014). Consequently, MC-LR cannot be considered a candidate allelochemicals driving growth inhibition of A. flos-aquae by Microcystis.…”

Section: Discussionmentioning

confidence: 99%

Growth inhibitory effect of Microcystis on Aphanizomenon flos-aquae isolated from cyanobacteria bloom in Lake Dianchi, China

Gan

et al. 2015

Harmful Algae

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Section: Discussionmentioning

confidence: 99%

Growth inhibitory effect of Microcystis on Aphanizomenon flos-aquae isolated from cyanobacteria bloom in Lake Dianchi, China

Gan

et al. 2015

Harmful Algae

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“…High water temperatures have been known to lead to cyanobacterial bloom development in temperate (Robarts andZohary, 1987 Jöhnk et al, 2008;Wu et al, 2014) and semi-arid (Mitrovic et al, 2003) regions. The genus Microcystis is one of the most important cyanobacteria due to its great ecological importance and public health implications (Sanchis et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of Microcystis aeruginosa growth and [D-Leu1] microcystin-LR production in culture media at different temperatures

et al. 2017

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A B S T R A C TThe effect of temperature (26 C, 28 C, 30 C and 35 C) on the growth of native CAAT-3-2005 Microcystis aeruginosa and the production of Chlorophyll-a (Chl-a) and Microcystin-LR (MC-LR) were examined through laboratory studies. Kinetic parameters such as specific growth rate (m), lag phase duration (LPD) and maximum population density (MPD) were determined by fitting the modified Gompertz equation to the M. aeruginosa strain cell count (cells mL À1 ). A 4.8-fold increase in m values and a 10.8-fold decrease in the LPD values were found for M. aeruginosa growth when the temperature changed from 15 C to 35 C. The activation energy of the specific growth rate (Em) and of the adaptation rate (E 1 /LPD) were significantly correlated (R 2 = 0.86). The cardinal temperatures estimated by the modified Ratkowsky model were minimum temperature = 8.58 AE 2.34 C, maximum temperature = 45.04 AE 1.35 C and optimum temperature = 33.39 AE 0.55 C.Maximum MC-LR production decreased 9.5-fold when the temperature was increased from 26 C to 35 C. The maximum production values were obtained at 26 C and the maximum depletion rate of intracellular MC-LR was observed at 30-35 C. The MC-LR cell quota was higher at 26 and 28 C (83 and 80 fg cell À1 , respectively) and the MC-LR Chl-a quota was similar at all the different temperatures (0.5-1.5 fg ng À1 ).The Gompertz equation and dynamic model were found to be the most appropriate approaches to calculate M. aeruginosa growth and production of MC-LR, respectively. Given that toxin production decreased with increasing temperatures but growth increased, this study demonstrates that growth and toxin production processes are uncoupled in M. aeruginosa. These data and models may be useful to predict M. aeruginosa bloom formation in the environment.

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“…Moreover, M. wesenbergii, M. flos-aquae , and M. viridis have been reported as the dominant species in lakes besides M. aeruginosa 2728. Succession is always observed in these species in lakes29. A serious and important question is whether or not we can use the Cu 2+ dose determined from M. aeruginosa to control all Microcystis species in lakes.…”

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Species-dependent variation in sensitivity of Microcystis species to copper sulfate: implication in algal toxicity of copper and controls of blooms

Wei

Tan

et al. 2017

Sci Rep

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Copper sulfate is a frequently used reagent for Microcystis blooms control but almost all the previous works have used Microcystis aeruginosa as the target organism to determine dosages. The aim of this study was to evaluate interspecific differences in the responses of various Microcystis species to varying Cu2+ concentrations (0, 0.05, 0.10, 0.25, and 0.50 mg L−1). The half maximal effective concentration values for M. aeruginosa, M. wesenbergii, M. flos-aquae, and M. viridis were 0.16, 0.09, 0.49, and 0.45 mg L−1 Cu2+, respectively. This showed a species-dependent variation in the sensitivity of Microcystis species to copper sulfate. Malonaldehyde content did not decrease with increasing superoxide dismutase content induced by increasing Cu2+, suggesting that superoxide dismutase failed to reduce Cu2+ damage in Microcystis. Considering the risk of microcystin release when Microcystis membranes are destroyed as a result of Cu2+ treatment and the stimulation effects of a low level of Cu2+ on growth in various species, our results suggest that copper sulfate treatment for Microcystis control could be applied before midsummer when M. aeruginosa and M. viridis are not the dominant species and actual amount of Cu2+ used to control M. wesenbergii should be much greater than 0.10 mg L−1.

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Seasonal dynamics of water bloom-forming Microcystis morphospecies and the associated extracellular microcystin concentrations in large, shallow, eutrophic Dianchi Lake

Cited by 78 publications

References 40 publications

Growth inhibitory effect of Microcystis on Aphanizomenon flos-aquae isolated from cyanobacteria bloom in Lake Dianchi, China

Growth inhibitory effect of Microcystis on Aphanizomenon flos-aquae isolated from cyanobacteria bloom in Lake Dianchi, China

Mathematical modeling of Microcystis aeruginosa growth and [D-Leu1] microcystin-LR production in culture media at different temperatures

Species-dependent variation in sensitivity of Microcystis species to copper sulfate: implication in algal toxicity of copper and controls of blooms

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