scholarly journals Mechanisms on the Dominant Species Transition from Scenedesmus quadricauda to Microcystis aeruginosa in Eutrophic Conditions

2015 ◽  
Vol 28 (5) ◽  
pp. 233-244 ◽  
Author(s):  
Ryohei TAKEUCHI ◽  
Yoshimasa AMANO ◽  
Motoi MACHIDA
Keyword(s):  
Microcystis Aeruginosa ◽  
Dominant Species ◽  
Scenedesmus Quadricauda

ASSEMBLÉIAS MICROFITOPLANCTÔNICAS NUM LAGO URBANO DA CIDADE DE CURITIBA (ESTADO DO PARANÁ, BRASIL)

2007 ◽  
Vol 29 (66) ◽  
Author(s):  
Gilmar Perbiche-Neves ◽  
Mateus Ferrareze ◽  
André Ricardo Ghidini ◽  
Lineu de Brito ◽  
Madalena Tomi Shirata
Keyword(s):  
Microcystis Aeruginosa ◽  
Scenedesmus Quadricauda ◽  
Aulacoseira Granulata

O lago artificial do Parque Passeio Público tem sido submetido a grandes descargas de nutrientes, que associado à baixa profundidade e ao longo tempo de residência da água, contribuiu para a ocorrência de florações de fitoplâncton. O principal objetivo deste estudo foi analisar a variabilidade sazonal da estrutura das assembléias microfitoplanctônicas (composição e dominância) num lago urbano de Curitiba(PR). Os dados foram obtidos mensalmente, entre agosto/2002 a julho/2003, em quatro pontos de amostragem. O número total de táxons identificados foi vinte e nove. Houve predominância de Chlorococcaceae (17 taxa), seguido de Cyanophyceae (6 taxa) e Coscinodiscophyceae (4 taxa). As espécies com maior ocorrência, em ordem decrescente, foram: Scenedesmus quadricauda, Golenkinia radiata, Microcystis aeruginosa, Pediastrum duplex var. boryanum, Kirchneriella lunaris, Staurastrum paradoxum, Micractinium pusillum,Aulacoseira granulata, Lagerheimia ciliata e Sphaerocystis schroeteri. O estudo conclui que a comunidade fitoplanctônica responde às variações ambientais no lago, espacial e temporalmente.

scholarly journals The formation of haloacetamides, as an emerging class of N-DBPs, from chlor(am)ination of algal organic matter extracted from Microcystis aeruginosa, Scenedesmus quadricauda and Nitzschia palea

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7679-7687 ◽  
Author(s):  
Ni Zhang ◽  
Cao Liu ◽  
Fei Qi ◽  
Bingbing Xu
Keyword(s):  
Organic Matter ◽  
Microcystis Aeruginosa ◽  
Scenedesmus Quadricauda ◽  
Nitzschia Palea ◽  
Algal Organic Matter

The formation of haloacetamides, as an emerging class of N-DBPs, from AOM disinfection extracted from Microcystis aeruginosa, Scenedesmus quadricauda and Nitzschia palea.

scholarly journals Characteristics of Fluorescence Spectra, UV Spectra, and Specific Growth Rates during the Outbreak of Toxic Microcystis Aeruginosa FACHB-905 and Non-Toxic FACHB-469 under Different Nutrient Conditions in a Eutrophic Microcosmic Simulation Device

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2305
Author(s):  
Qi Wang ◽  
Wenjing Pang ◽  
ShuJie Ge ◽  
Hengguo Yu ◽  
Chuanjun Dai ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microcystis Aeruginosa ◽  
Dominant Species ◽  
Fluorescence Spectra ◽  
Specific Growth ◽  
Cyanobacteria Blooms ◽  
Microcystis Strain ◽  
Water Blooms ◽  
Nutrient Conditions

Microcystis aeruginosa is the dominant alga forming cyanobacteria blooms, the growth of which is limited by available nutrients. Thus, it is necessary to study cyanobacteria blooms and explore the growth of Microcystis aeruginosa under different nutrient conditions. In this paper, we take Microcystis aeruginosa, including toxic Freshwater Algae Culture of Hydrobiology Collection (FACHB)-905 and non-toxic FACHB-469 strains, into account. The strains were cultured using a simulation device under different nutrient conditions. Ultraviolet spectra, three-dimensional fluorescence spectra, and kinetic parameter indicators of the two species are studied. Compared to FACHB-469, the results show that the specific growth rate of FACHB-905 is much higher, in particular, FACHB-905 is the dominant species under low nutrient conditions. Furthermore, the UV spectral characteristics indicate that the molecular weight of dissolved organic matter in the culture tank of toxic FACHB-905 is greater than that of FACHB-469. Additionally, the humification index of toxic FACHB-905 is slightly higher as well, which suggests that it is more stable in the presence of dissolved organic matter during blooms. Therefore, the toxic Microcystis strain is more likely to become the dominant species in water blooms under lower eutrophic conditions and water blooms formed by the toxic Microcystis strain may be more difficult to recover from.

Study on Inhibitory Effect of Wheat Stalk on Algae by Different Treatments

2013 ◽  
Vol 726-731 ◽  
pp. 565-570
Author(s):  
Ri Hong Liao ◽  
Zhi Lan Xu ◽  
Xu Wen He ◽  
Xiu Lin Hu
Keyword(s):  
Microcystis Aeruginosa ◽  
Natural Water ◽  
Dominant Species ◽  
Inhibitory Effect ◽  
Phytoplankton Species ◽  
Inhibitory Rate ◽  
Phytoplankton Cells

This paper reports the effects of wheat stalk anaerobic extract and wheat stalk powder on the inhibition ofMicrocystis aeruginosain the laboratory, and the broken wheat stalk on the growth of the phytoplankton and zooplankton in natural water. The results show that: (1) the Wheat stalk Anaerobic extract has inhibitory effect on theMicrocystis aeruginosa, the average inhibiting rate was 59%; (2) the Wheat stalk powder has obvious inhibitory effect on theMicrocystis aeruginosa, the average inhibitory rate was 74% and the effect increased with the passage of time. The inhibitory rate remained the range of 75%~96% from the 3rd day to 13th day after adding the Wheat stalk powder; (3) In natural water, the addition of broken wheat stalk can cause change of the dominant phytoplankton species in which cyanophyte is not obvious dominant species anymore, and the broken wheat stalk has inhibitory effect on the growth of phytoplankton cells; (4) The addition of broken wheat stalk can promote the growth of poor-middle nutrition species zooplankton in natural water, and make their abundance soars rapidly.

Effect of Fe2+ and Fe 3+ on the Growth of Microcystis aeruginosa, Scenedesmus quadricauda and Cyclotella sp.

2011 ◽  
Vol 183-185 ◽  
pp. 510-515
Author(s):  
Qin Wang ◽  
Zong Xue Xu ◽  
Xia Jiang ◽  
Ji Xi Gao
Keyword(s):  
Microcystis Aeruginosa ◽  
Culture Medium ◽  
Growth Curves ◽  
Scenedesmus Quadricauda ◽  
Logistic Growth ◽  
High Concentration ◽  
Nutrient Sources ◽  
Monod Equation ◽  
Maximum Biomass ◽  
Logistic Growth Model

Ferrum is one of the important nutrient sources for algae in lakes. The changes of concentration in water body have great effect on the formation of dominant algae. Microcystis aeruginosa, Scenedesmus quadricauda and Cyclotella were examined in M11 culture medium which included different Fe2+ and Fe3+ concentration. Growth curves of these three algae were fitted by logistic growth-model, respectively. The maximum biomass K, inflection t and growth rate µ of those algae were investigated. The effects of Fe2+ and Fe3+ on the growth of algae were investigated by using the Monod equation. The semi-saturation constants were calculated. The results showed that the maximum biomass of these three algae did not increase with the increasing of Fe2+ and Fe3+ concentration. Low concentration of Fe2+ (200-500 mg/L) and high concentration of Fe3+ (2000-5000 mg/L) were more suitable to the growth of three algae. The sequence of the maximum biomass was: Scenedesmus quadricauda>Microcystis aeruginosa>Cyclotella.

Inhibitory Effect Study of Coptis Extract on Algae

2011 ◽  
Vol 343-344 ◽  
pp. 235-240
Author(s):  
Zhi Lan Xu ◽  
Ri Hong Liao ◽  
Qing Yi Meng ◽  
Li Xin Zhao
Keyword(s):  
Species Composition ◽  
Microcystis Aeruginosa ◽  
Natural Water ◽  
Dominant Species ◽  
Inhibitory Effect ◽  
Effect Study ◽  
Inhibitory Rate ◽  
Phytoplankton Cells

This paper reports the study of Coptis extract on its inhibition of Microcystis aeruginosa in the laboratory, and its influence on the growth of phytoplankton and zooplankton, and its impact on the Microcystin, in the natural water. The results show that: (1) the Coptis extract has obvious inhibitory effect on the Microcystis aeruginosa, and the effect increases with time. The inhibitory rate keeps above 85% from the 3rd day to 13th day after adding the Coptis extract; (2) In the natural water, the Coptis extract does not change the dominant species of phytoplankton and the species composition of zooplankton. 1~9 days after adding the Coptis extract, the density of phytoplankton cells and the dominant species (Cyanophyta) cells decrease, and the quantity of poor-middle nutrition species zooplankton soars to rise rapidly. (3) No variation on Microcystin-LR content in experiment area is observed one day after adding Coptis extract.

scholarly journals Effects of lanthanum(III) and EDTA on the growth and competition of Microcystis aeruginosa and Scenedesmus quadricauda

Limnologica ◽  
2009 ◽  
Vol 39 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Xiangcan Jin ◽  
Zhaosheng Chu ◽  
Feng Yan ◽  
Qingru Zeng
Keyword(s):  
Microcystis Aeruginosa ◽  
Scenedesmus Quadricauda
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