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Journal articles on the topic 'Limnothrix'

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Published: 10 December 2022

Last updated: 19 February 2023

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1

Zhu, Mengling, Gongliang Yu, Xiaochuang Li, Wenhua Tan, and Renhui Li. "Taxonomic and phylogenetic evaluation of Limnothrix strains (Oscillatoriales, Cyanobacteria) by adding Limnothrix planktonica strains isolated from central China." Hydrobiologia 698, no. 1 (May 16, 2012): 367–74. http://dx.doi.org/10.1007/s10750-012-1127-8.

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2

Kim, Ye-Ri, Jeong-Mi Do, Kyung Hee Kim, Alexandra R. Stoica, Seung-Woo Jo, Un-Kyung Kim, and Ho-Sung Yoon. "C-phycocyanin from Limnothrix Species KNUA002 Alleviates Cisplatin-Induced Ototoxicity by Blocking the Mitochondrial Apoptotic Pathway in Auditory Cells." Marine Drugs 17, no. 4 (April 19, 2019): 235. http://dx.doi.org/10.3390/md17040235.

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Ototoxicity, or adverse pharmacological effects on the inner ear or auditory nerve, is a common side effect of cisplatin, a platinum-based drug widely used in anticancer chemotherapy. Although the incidence of ototoxicity is high among patients that receive cisplatin therapy, there is currently no effective treatment for it. The generation of excessive reactive oxygen species (ROS) is considered to be the major cause of cisplatin-induced ototoxicity. C-phycocyanin (C-PC), a blue phycobiliprotein found in cyanobacteria and red algae, has antioxidant and anticancer activities in different experimental models in vitro and in vivo. Thus, we tested the ability of C-PC from Limnothrix sp. KNUA002 to protect auditory cells from cisplatin-induced ototoxicity in vitro. Pretreatment with C-PC from Limnothrix sp. KNUA002 inhibited apoptosis and protected mitochondrial function by preventing ROS accumulation in cisplatin-treated House Ear Institute-Organ of Corti 1 (HEI-OC1) cells, a mouse auditory cell line. Cisplatin increased the expression of Bax and reduced the expression of Bcl-2, which activate and inhibit, respectively, the mitochondrial apoptotic pathway in response to oxidative stress. Pretreatment with C-PC prior to cisplatin treatment caused the Bax and Bcl-2 levels to stay close to the levels in untreated control cells. Our results suggest that C-PC from Limnothrix sp. KNUA002 protects cells against cisplatin-induced cytotoxicity by inhibiting the mitochondrial apoptotic pathway.

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3

Meffert, Maria-Elisabeth. "Biotope selection of Limnothrix rosea (UTERMÖHL) MEFFERT (Cyanophyceae)." Archiv für Hydrobiologie 117, no. 2 (December 20, 1989): 129–39. http://dx.doi.org/10.1127/archiv-hydrobiol/117/1989/129.

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4

Romanov, R. E. "Limnothrix redeckei (Van Goor) Meffert (Cyanoprocaryota) in the potamoplankton." International Journal on Algae 9, no. 2 (2007): 105–16. http://dx.doi.org/10.1615/interjalgae.v9.i2.10.

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5

Ott, Ingmar, Peeter Nõges, Reet Laugaste, and Toomas Kõrv. "Occurrence of Limnothrix redekei Van Goor in Estonian lakes." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 109 (August 1, 2003): 455–68. http://dx.doi.org/10.1127/1864-1318/2003/0109-0455.

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6

DE OLIVEIRA, ELANE D. CUNHA, ALAN C. DA CUNHA, NATALINA B. DA SILVA, RAQUEL CASTELO-BRANCO, JOÃO MORAIS, MARIA PAULA C. SCHNEIDER, SILVIA M. M. FAUSTINO, VITOR RAMOS, and VITOR VASCONCELOS. "Morphological and molecular characterization of cyanobacterial isolates from the mouth of the Amazon River." Phytotaxa 387, no. 4 (January 11, 2019): 269. http://dx.doi.org/10.11646/phytotaxa.387.4.1.

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The Amazon region contains a great diversity of species, and the Amazon River basin accounts for almost 20% of all the freshwater in the world. Despite the favorable environmental conditions in this region, little is known about the cyanobacterial diversity of this waterbody, especially at the mouth of the river. In this paper, we used the polyphasic approach to identify 14 cyanobacterial strains isolated in the Amazon River on the inlet site from a drinking water supply located close to the river mouth. The isolated strains were characterized based on morphology, behavior in culture, 16S rRNA gene sequencing, phylogenetic analysis and potential for toxin production. The isolated strains belong to seven different genera, namely, Alkalinema, Cephalothrix, Limnothrix, Leptolyngbya, Phormidium, Pseudanabaena and an unidentified Nostocales taxa that may represent a new genus. Strikingly, there were no new species, nor detection of gene clusters associated with cyanotoxin production. However, the phylogenetic placements of the Amazonian strains of Limnothrix and Pseudanabaena provide new insight into the taxonomy of these genera, reinforcing the need for taxonomic revision.

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7

Meffert, Maria-Elisabeth. "In situ and in vitro photosynthesis of Limnothrix redekei (Cyanophyta)." Archiv für Hydrobiologie 116, no. 4 (October 16, 1989): 401–14. http://dx.doi.org/10.1127/archiv-hydrobiol/116/1989/401.

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8

Yu, Gongliang, Mengling Zhu, Youxin Chen, Qianqian Pan, Wenbo Chai, and Renhui Li. "Polyphasic characterization of four species of Pseudanabaena (Oscillatoriales, Cyanobacteria) from China and insights into polyphyletic divergence within the Pseudanabaena genus." Phytotaxa 192, no. 1 (January 7, 2015): 1. http://dx.doi.org/10.11646/phytotaxa.192.1.1.

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Current cyanobacterial taxonomic studies are mainly performed through polyphasic characterization at the genus and/or species levels. In this study, eleven Pseudanabaena strains isolated in China were taxonomically and phylogenetically evaluated by investigating several characteristics, including morphological features, cellular ultrastructures, pigment composition, and 16S rRNA gene sequences. The strains were identified as four morphospecies, namely, Pseudanabaena mucicola, P. galeata, P. limnetica, and P. minima. The cellular ultrastructures of these species showed that peripheral thylakoids with 4‒8 parallel layers were parietally distributed. Phylogenetic results based on 16S rRNA gene sequences indicated that most of the Pseudanabaena strains used in this study, including the eleven from China and three Pseudanabaena catenata strains from GenBank, gathered into one large cluster that represents the core of the genus Pseudanabaena. Several Pseudanabaena species/strains that represent different extreme environments were phylogenetically located outside the main stream cluster and should be removed under the genus Pseudanabaena on the basis of the role of the main stream species. Limnothrix strains were divided into two clades, and the taxonomic solution for these clades was discussed. This study is the first to report on the morphology and phylogeny of Pseudanabaena species in China, providing new insights into the taxonomy of the genera Pseudanabaena and Limnothrix.

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9

Xiangling, Liu, Han Ying, Zhao Yijun, and Cheng Kai. "A novel freshwater cyanophage with a complex collar infects Limnothrix planktonica." Phycologia 54, no. 6 (November 2015): 578–82. http://dx.doi.org/10.2216/15-82.1.

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10

Noronha, Judith M., Manguesh U. Gauns, and Sanjeev C. Ghadi. "Isolation of a novel cyanophage infecting potentially bloom-forming Limnothrix sp." Limnologica 93 (March 2022): 125961. http://dx.doi.org/10.1016/j.limno.2022.125961.

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11

Humpage, Andrew, Ian Falconer, Catherine Bernard, Suzanne Froscio, and Larelle Fabbro. "Toxicity of the cyanobacterium Limnothrix AC0243 to male Balb/c mice." Water Research 46, no. 5 (April 2012): 1576–83. http://dx.doi.org/10.1016/j.watres.2011.11.019.

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12

Bernard, Catherine, Suzanne Froscio, Rebecca Campbell, Paul Monis, Andrew Humpage, and Larelle Fabbro. "Novel toxic effects associated with a tropical Limnothrix/Geitlerinema-like cyanobacterium." Environmental Toxicology 26, no. 3 (May 5, 2011): 260–70. http://dx.doi.org/10.1002/tox.20552.

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13

Hong, Ji Won, Seung-Woo Jo, Oh Hong Kim, Mi Rang Jeong, Hyeon Kim, Kyung Mok Park, Kyoung In Lee, and Ho-Sung Yoon. "Characterization of a Korean Domestic Cyanobacterium Limnothrix sp. KNUA012 for Biofuel Feedstock." Journal of Life Science 26, no. 4 (April 30, 2016): 460–67. http://dx.doi.org/10.5352/jls.2016.26.4.460.

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14

Khattar, J. I. S., D. P. Singh, Namita Jindal, N. Kaur, Y. Singh, P. Rahi, and A. Gulati. "Isolation and Characterization of Exopolysaccharides Produced by the Cyanobacterium Limnothrix redekei PUPCCC 116." Applied Biochemistry and Biotechnology 162, no. 5 (February 20, 2010): 1327–38. http://dx.doi.org/10.1007/s12010-010-8922-3.

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15

Daniels, Olivia, Larelle Fabbro, and Sandrine Makiela. "The Effects of the Toxic Cyanobacterium Limnothrix (Strain AC0243) on Bufo marinus Larvae." Toxins 6, no. 3 (March 6, 2014): 1021–35. http://dx.doi.org/10.3390/toxins6031021.

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16

NISHIZAWA, Tomoyasu, Tomoyo HANAMI, Eriko HIRANO, Takamasa MIURA, Yuko WATANABE, Akira TAKANEZAWA, Masakazu KOMATSUZAKI, Hiroyuki OHTA, Makoto SHIRAI, and Munehiko ASAYAMA. "Isolation and Molecular Characterization of a Multicellular Cyanobacterium, Limnothrix/Pseudanabaena sp. Strain ABRG5-3." Bioscience, Biotechnology, and Biochemistry 74, no. 9 (September 23, 2010): 1827–35. http://dx.doi.org/10.1271/bbb.100216.

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17

de P. Azevedo, Maria Teresa, Catharina A. de Souza, Tatiana Rosado, Vera Huszar, and Fabio Roland. "Limnothrix bicudoi, a new species of Cyanophyceae/Cyanobacteria from Southeast of Brazil." Algological Studies 109, no. 1 (August 1, 2003): 93–102. http://dx.doi.org/10.1127/1864-1318/2003/0109-0093.

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18

Nicklisch, Andreas. "Does mortality by nitrogen deficiency influence the succession of Limnothrix redekei and Planktothrix agardhii?" SIL Proceedings, 1922-2010 25, no. 4 (October 1994): 2214–17. http://dx.doi.org/10.1080/03680770.1992.11900599.

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19

Kuzmenko, Anton, Denis Yudin, Sergei Ryazansky, Andrey Kulbachinskiy, and Alexei A. Aravin. "Programmable DNA cleavage by Ago nucleases from mesophilic bacteria Clostridium butyricum and Limnothrix rosea." Nucleic Acids Research 47, no. 11 (May 22, 2019): 5822–36. http://dx.doi.org/10.1093/nar/gkz379.

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20

Park, Ae Kyung, Il-Sup Kim, Byung Wook Jeon, Soo Jung Roh, Min-Young Ryu, Hae-Ri Baek, Seoung-Woo Jo, et al. "Crystal structures of aldehyde deformylating oxygenase from Limnothrix sp. KNUA012 and Oscillatoria sp. KNUA011." Biochemical and Biophysical Research Communications 477, no. 3 (August 2016): 395–400. http://dx.doi.org/10.1016/j.bbrc.2016.06.090.

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21

Karageorgou, Dimitra, Panagiota Zygouri, Theofylaktos Tsakiridis, Mohamed Amen Hammami, Nikolaos Chalmpes, Mohammed Subrati, Ioannis Sainis, et al. "Green Synthesis and Characterization of Silver Nanoparticles with High Antibacterial Activity Using Cell Extracts of Cyanobacterium Pseudanabaena/Limnothrix sp." Nanomaterials 12, no. 13 (July 4, 2022): 2296. http://dx.doi.org/10.3390/nano12132296.

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In this work, we demonstrated the ability of the cyanobacterium Pseudanabaena/Limnothrix sp. to produce ultra-small silver nanoparticlesin the forms of metallic silver (Ag0) and silver oxides (AgxOy) via a facile green synthetic process. The biological compounds in the cyanobacterial cellular extract acted both as reducing agents for silver ions and functional stabilizing agents for the silver nanoparticles. Furthermore, the antibacterical activity of the as-synthesized nanoparticles against Gram-negative Escherichia coli and Gram-positive Corynebacterium glutamicum bacterial cells was evaluated. The experimental results revealed a remarkable bactericidal activity of the nanoparticles that was both time-dependent and dose-dependent. In addition to their excellent bactericidal properties, the developed nanoparticles can be used as nanosupports in various environmental, biological, and medical applications.

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22

Gantar, Miroslav, Dragan Simović, Sonja Djilas, Walter W. Gonzalez, and Jaroslava Miksovska. "Isolation, characterization and antioxidative activity of C-phycocyanin from Limnothrix sp. strain 37-2-1." Journal of Biotechnology 159, no. 1-2 (May 2012): 21–26. http://dx.doi.org/10.1016/j.jbiotec.2012.02.004.

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23

Sugawara, Takuya, Mariko Chinzei, Setsuko Numano, Chifumi Kitazaki, and Munehiko Asayama. "Flocculation and pentadecane production of a novel filamentous cyanobacterium Limnothrix sp. strain SK1-2-1." Biotechnology Letters 40, no. 5 (March 5, 2018): 829–36. http://dx.doi.org/10.1007/s10529-018-2525-4.

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24

Anas et al., Abdulaziz. "EVALUATION OF ANTIOXIDANT AND CYTOTOXIC PROPERTIES OF CYANOBACTERIA, LIMNOTHRIX SP. AND LEPTOLYNGBYA SP. FROM ARABIAN SEA." Journal of Microbiology, Biotechnology and Food Sciences 6, no. 3 (December 1, 2016): 956–60. http://dx.doi.org/10.15414/jmbfs.2016/17.6.3.956-960.

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25

Nõges, Peeter, and Ingmar Ott. "Occurrence, coexistence and competition of Limnothrix redekei and Planktothrix agardhii: analysis of Danish-Estonian lake database." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 109 (August 1, 2003): 429–41. http://dx.doi.org/10.1127/1864-1318/2003/0109-0429.

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26

Perkerson III, Ralph B., Emilie A. Perkerson, and Dale A. Casamatta. "Phylogenetic examination of the cyanobacterial genera Geitlerinema and Limnothrix (Pseudanabaenaceae) using 16S rDNA gene sequence data." Algological Studies 134 (July 1, 2010): 1–16. http://dx.doi.org/10.1127/1864-1318/2010/0134-0001.

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27

Gkelis, S., P. Rajaniemi, E. Vardaka, M. Moustaka-Gouni, T. Lanaras, and K. Sivonen. "Limnothrix redekei (Van Goor) Meffert (Cyanobacteria) Strains from Lake Kastoria, Greece Form a Separate Phylogenetic Group." Microbial Ecology 49, no. 1 (January 2005): 176–82. http://dx.doi.org/10.1007/s00248-003-2030-7.

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28

Pechar, L. "Long-term changes in fish pond management as ‘an unplanned ecosystem experiment’: importance of zooplankton structure, nutrients and light for species composition of cyanobacterial blooms." Water Science and Technology 32, no. 4 (August 1, 1995): 187–96. http://dx.doi.org/10.2166/wst.1995.0183.

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The study presents data on the species composition of cyanobacterial water blooms in Czech fish ponds from the 1950s to the 1990s. Since the 1950s, a shift from large-colonial Aphanizomenon flos-aquae var. flos-aquae through Microcystis aeruginosa and small-colonial species of Anabaena to single-filament species (Planktohrix agardhii, Limnothrix redekei, Aphanizomenon gracile) or single-cell forms (Microcystis ichtyoblabe), has been observed. The changes in the species composition of the water blooms are closely related to changes in fishery management (increase in fish stock, increase in application of organic fertilizers). At present the high predation of fish upon zooplankton results in elimination of large colonial blooms of A. flos-aquae associated with large filtering zooplankton (Daphnia). Low grazing pressure of zooplankton, low light conditions and low N:P ratios are suitable conditions for mass development of the small species of cyanobacteria. High pH is not necessary to achieve cyanobacteria dominance.

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29

Nõges, Peeter. "Seasonal variation in trichome length of cyanophytes Limnothrix planctonica and L. redekei in a large shallow lake." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 94 (September 16, 1999): 261–74. http://dx.doi.org/10.1127/algol_stud/94/1999/261.

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30

Rose, Adam K., Larelle Fabbro, and Susan Kinnear. "Cyanobacteria breakthrough: Effects of Limnothrix redekei contamination in an artificial bank filtration on a regional water supply." Harmful Algae 76 (June 2018): 1–10. http://dx.doi.org/10.1016/j.hal.2018.04.010.

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31

Dembowska, Ewa. "Cyanobacterial blooms in shallow lakes of the Iławskie Lake District." Limnological Review 11, no. 2 (January 1, 2011): 69–79. http://dx.doi.org/10.2478/v10194-011-0028-y.

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Cyanobacterial blooms in shallow lakes of the Iławskie Lake DistrictThe dominance of blue-green algae observed in many lakes is related to a high trophic level. Shallow eutrophic lakes are particularly often abundant in blue-green algae. The research on phytoplankton, the results of which are presented in this paper, was carried out between 2002 and 2005 in six lakes. These lakes differed considerably in their size and management methods applied in the catchment (drainage) area. A few types of water blooms were distinguished, which is related to the catchment area management, the intensity of mixing and the trophic level. Algal blooms of the Planktothrix type appeared in lakes situated in an open area of agricultural catchment basins. Algal blooms of the Limnothrix type were characteristic of lakes with a forest-agricultural catchment area but surrounded by high shores, which reduced the wind influence on the mixing. Sporadic mixed algal blooms were typical of lakes situated in forest catchment areas.

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32

Kopp, Radovan, Andrea Ziková, Jan Mareš, Stanislav Navrátil, Ondřej Adamovský, and Miroslava Palíková. "Diversity and toxin content of cyanobacteria in fish ponds (South Moravia, Czech Republic) related to fishery management intensity." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 56, no. 5 (2008): 111–18. http://dx.doi.org/10.11118/actaun200856050111.

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During the vegetative period of the year 2005 (June–October) we carried out hydrobiological and hydrochemical monitoring of selected ponds inhered in Southern Moravia in relation to different fishery management intensities. Water temperature, dissolved oxygen content, pH, conductivity and water transparency were monitored directly at taking place, N–NH4+, N–NO2-, N–NO3-, P–PO43- content and chlorophyll-a concentration were measured in hydrochemical laboratory. At the same time, water samples for taxonomical analyses of phytoplankton and assessment of toxin content of cyanobacteria were taken. All ponds were characterized by low water transparency, high values of pH, N–NH4+, P–PO43- and high chlorophyll a concentration. We detected maximum concentration of 18.7 µg . l−1 microcystins in ponds dominated by the species Microcystis aeruginosa. Total microcystin concentration in water of all ponds with dominance of pikoplanktonic cyanobacteria were below detection limit (LOD < 0.125 µg . l−1). The dominance of cyanobacteria species shifts from coccal (especially genus Microcystis) to small-colonial pikoplanctonic (genus Aphanocapsa, Aphanothece) and to single-filamentous (genus Planktothrix, Limnothrix, Pseudanabaena) cyanobacteria related to increasing fish stock density.

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33

Economou, Christina N., Nikolaos Marinakis, Maria Moustaka-Gouni, George Kehayias, George Aggelis, and Dimitris V. Vayenas. "Lipid production by the filamentous cyanobacterium Limnothrix sp. growing in synthetic wastewater in suspended- and attached-growth photobioreactor systems." Annals of Microbiology 65, no. 4 (January 15, 2015): 1941–48. http://dx.doi.org/10.1007/s13213-014-1032-7.

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34

Rojo, C., and M. Alvarez Cobelas. "Population dynamics of Limnothrix redekei, Oscillatoria lanceaeformis, Planktothrix agardhii and Pseudanabaena limnetica (cyanobacteria) in a shallow hypertrophic lake (Spain)." Hydrobiologia 275-276, no. 1 (February 1994): 165–71. http://dx.doi.org/10.1007/bf00026708.

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35

Aboim, Joseline Barbosa, Deborah Terra de Oliveira, Vanessa Albuquerque de Mescouto, André Silva dos Reis, Geraldo Narciso da Rocha Filho, Agenor Valadares Santos, Luciana Pereira Xavier, Alberdan Silva Santos, Evonnildo Costa Gonçalves, and Luis Adriano Santos do Nascimento. "Optimization of Light Intensity and NaNO3 Concentration in Amazon Cyanobacteria Cultivation to Produce Biodiesel." Molecules 24, no. 12 (June 24, 2019): 2326. http://dx.doi.org/10.3390/molecules24122326.

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The objective of this study, for the first time, was to optimize Amazonian cyanobacterial culture conditions for improving cell productivity and lipid content, by analyzing the effect of light intensity and nitrogen concentration, for empirically evaluating biodiesel quality parameters. The strains Synechocystis sp. CACIAM05, Microcystis aeruginosa CACIAM08, Pantanalinema rosaneae CACIAM18, and Limnothrix sp. CACIAM25, were previously identified by morphological and molecular analysis (16S rRNA) and were selected based on their production of chlorophyll a and dry cell weight. Then, factorial planning (22) with central points was applied, with light intensity and NaNO3 concentration as independent variables. As response variables, cell productivity and lipid content were determined. Statistical analysis indicated that for all strains, the independent variables were statistically significant for cell productivity. Analysis of the fatty acid composition demonstrated diversity in the composition of the fatty acid profile from the experimental planning assays of each strain. The Biodiesel Analyzer software predicted the biodiesel quality parameters. CACIAM05 and CACIAM25 obtained better parameters with low levels of light intensity and NaNO3 concentration, whereas CACIAM08 and CACIAM18 obtained better parameters with low NaNO3 concentrations and high luminous intensity.

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36

Falcone-Dias, Maria Fernanda, Marianna Vaz Rodrigues, Jeppe Lund Nielsen, Nadieh de Jonge, Niels O. G. Jørgensen, Diego Peres Alonso, Gianmarco S. David, Reinaldo José da Silva, and João Pessoa Araújo Júnior. "Occurrence of Cyanobacteria and microcystins in hydroelectric reservoirs used for fish farming." Journal of Water and Health 18, no. 6 (October 29, 2020): 983–94. http://dx.doi.org/10.2166/wh.2020.089.

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Abstract Fish farming can have a negative impact on water quality and aquatic organisms due to emerging blooms of Cyanobacteria and the production of cyanotoxins. In this study, the effect of aquaculture in hydroelectric reservoirs in Brazil was evaluated in six fish farms and in upstream and downstream water through analysis of the microbiome, Cyanobacteria and microcystin concentrations. Synechococcus and Microcystis were observed at all six locations, while Limnothrix was also observed abundantly at two locations. An increase in the relative abundance of Cyanobacteria inside the fish farms was observed at two locations, while an increase of Cyanobacteria was observed in downstream at five of the six locations. Microcystins were detected in significant and high values in all locations, with concentrations up to 1.59 μg/L. The trend in microcystin concentrations was mirrored in copy numbers of the mcyE gene (encodes microcystin synthetase) and presence of Microcystis, but not in any of the other observed cyanobacterial groups. In summary, the study shows that aquaculture production influenced the water microbiome inside and downstream the fish farms, and a direct correlation was found between mcyE gene copies, microcystin production and abundance of Microcystis, but not for the total abundance of Cyanobacteria.

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37

Czyżewska, Wanda, and Marlena Piontek. "The Efficiency of Microstrainers Filtration in the Process of Removing Phytoplankton with Special Consideration of Cyanobacteria." Toxins 11, no. 5 (May 21, 2019): 285. http://dx.doi.org/10.3390/toxins11050285.

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The research presented in this manuscript concerns the evaluation of the effectiveness of microstrainers, which are designed to reduce the amount of plankton in treated surface water. The efficiency of microstrainer filtration analysis is very important for the proper course of the water-treatment process not only in the Water-Treatment Plant (WTP) in Zielona Góra (central western Poland) but also in other WTPs around the world. The qualitative and quantitative monitoring of the abundance of plankton including cyanobacteria during the particle-filtration process allows not only for the assessment of the potential cyanotoxic risk in surface water providing a source of drinking water, but also allows the evaluation of the action and the prevention of adverse impacts of microstrainers. Over four years of research, it was observed that the largest amount of cyanobacteria before microstrainer filtration took place in May. The dominant species was Limnothrix redeckei. The microstrainer removal of plankton and cyanobacteria was statistically significant. The quantity of removed plankton increased with its increasing content in raw water. The particle-filtration process, by reducing the amount of cyanobacteria, contributes to a decrease in intracellular microcystins.

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38

D.C. Oliveira, Elane, Raquel Castelo-Branco, Luis Silva, Natalina Silva, Joana Azevedo, Vitor Vasconcelos, Silvia Faustino, and Alan Cunha. "First Detection of Microcystin-LR in the Amazon River at the Drinking Water Treatment Plant of the Municipality of Macapá, Brazil." Toxins 11, no. 11 (November 15, 2019): 669. http://dx.doi.org/10.3390/toxins11110669.

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Human poisoning by microcystin has been recorded in many countries, including Brazil, where fatal cases have already occurred. The Amazon River is the main source of drinking water in municipalities such as Macapá, where there is no monitoring of cyanobacteria and cyanotoxins. This study investigated the presence of cyanobacteria and cyanotoxins in samples from a drinking water treatment plant (DWTP) that catches water from the Amazon River. The toxin analyses employed ELISA, LC/MS, and molecular screening for genes involved in the production of cyanotoxins. The sampling was carried out monthly from April 2015 to April 2016 at the intake (raw water) and exit (treated water) of the DWTP. This study reports the first detection of microcystin-LR (MC-LR) in the Amazon River, the world’s largest river, and in its treated water destined for drinking water purposes in Macapá, Brazil. The cyanobacterial density and MC-LR concentration were both low during the year. However, Limnothrix planctonica showed a density peak (± 900 cells mL−1) in the quarter of June–August 2015, when MC-LR was registered (2.1 µg L−1). Statistical analyses indicate that L. planctonica may produce the microcystin.

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39

Savadova-Ratkus, Ksenija, Hanna Mazur-Marzec, Jūratė Karosienė, Kaarina Sivonen, Suvi Suurnäkki, Jūratė Kasperovičienė, Ričardas Paškauskas, and Judita Koreivienė. "Cyanobacteria and Their Metabolites in Mono- and Polidominant Shallow Eutrophic Temperate Lakes." International Journal of Environmental Research and Public Health 19, no. 22 (November 20, 2022): 15341. http://dx.doi.org/10.3390/ijerph192215341.

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Monodominant (one species dominates) or polidominant (multiple species dominate) cyanobacterial blooms are pronounced in productive freshwater ecosystems and pose a potential threat to the biota due to the synthesis of toxins. Seasonal changes in cyanobacteria species and cyanometabolites composition were studied in two shallow temperate eutrophic lakes. Data on cyanobacteria biomass and diversity of dominant species in the lakes were combined with chemical and molecular analyses of fifteen potentially toxin-producing cyanobacteria species (248 isolates from the lakes). Anatoxin-a, saxitoxin, microcystins and other non-ribosomal peptides formed the diverse profiles in monodominant (Planktothrix agardhii) and polidominant (Aphanizomenon gracile, Limnothrix spp. and Planktolyngbya limnetica) lakes. However, the harmfulness of the blooms depended on the ability of the dominant species to synthesize cyanometabolites. It was confirmed that P. agardhii produced a greater amount and diverse range of MCs and other NRPs. In the polidominant lake, isolates of the co-dominant A. gracile, L. planctonica and P. limnetica synthesized no or only small amounts of cyanometabolites. In general, the profile of cyanometabolites was greater in cyanobacteria isolates than in environmental samples, indicating a high potential for toxic cyanobacteria bloom.

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Kangro, Kersti, and Peeter Nõges. "Seasonal development of Planktothrix agardhii Anagnostidis et Komarek and Limnothrix redekei (Van Goor) Meffert in a sharply stratified hypertrophic lake." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 109 (August 1, 2003): 267–80. http://dx.doi.org/10.1127/1864-1318/2003/0109-0267.

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Dokulil, Martint T., and Jutta Mayer. "Population dynamics and photosynthetic rates of a Cylindrospermopsis - Limnothrix association in a highly eutrophic urban lake, Alte Donau, Vienna, Austria." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 83 (December 19, 1996): 179–95. http://dx.doi.org/10.1127/algol_stud/83/1996/179.

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Лозицкая, Екатерина Александровна, Олеся Сергеевна Бугранова, Оксана Владимировна Казимирченко, and Надежда Александровна Цупикова. "ОЦЕНКА ЭКОЛОГИЧЕСКОГО СОСТОЯНИЯ ОЗЕРА КАРПОВСКОГО В 2019 Г." KSTU News, no. 59 (January 11, 2020): 73–87. http://dx.doi.org/10.46845/1997-3071-2020-59-73-87.

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Озеро Карповское относится к категории малых водоемов Калининграда, активно используемых в рекреационных целях. Малые водоемы наиболее уязвимы к загрязнениям и в течение короткого периода времени могут утрачивать способность к самоочищению. Цель данной работы – оценка экологического состояния оз. Карповского по гидрохимическим, гидрологическим, микробиологическим и гидробиологическим параметрам. Гидрохимические показатели озера, за исключением содержания железа, соответствовали значениям рыбохозяйственных нормативов. Превышение нормативов по содержанию общего железа в водоеме характерно для поверхностных вод Калининградской области. Количество сапрофитных бактерий в воде увеличивалось к летне-осеннему сезону, что связано с повышением температуры воды летом в среднем до 22–26 °С и усилением деструктивных процессов в осенний сезон. В бактериопланктоне оз. Карповского преобладали аэробные бактерии, развитие которых определялось наличием в воде легкодоступного органического вещества, достаточного количества кислорода, благоприятного pH среды. Патогенных бактерий, опасных для здоровья человека, в микрофлоре воды не обнаруживали. Альгофлора озера по таксономическим показателям характеризовалась как «зелено-эвгленово-диатомово-синезеленая», что характерно для многих урбанизированных водоемов. В количественном отношении преобладали водоросли из отдела Cyanoprokaryota при доминировании Limnothrix redekei и Planktothrix agardhii. Вегетация водорослей в течение всего периода способствовала поддержанию стабильно высокого содержания кислорода и, возможно, оказывала влияние на снижение содержания биогенных элементов в воде. Результаты проведенного комплексного анализа показали, что оз. Карпов-ское относится к водоемам β-мезосапробной зоны – это соответствует эвтрофному уровню.

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Tokodi, Nada, Damjana Drobac Backović, Jelena Lujić, Ilija Šćekić, Snežana Simić, Nevena Đorđević, Tamara Dulić, et al. "Protected Freshwater Ecosystem with Incessant Cyanobacterial Blooming Awaiting a Resolution." Water 12, no. 1 (December 31, 2019): 129. http://dx.doi.org/10.3390/w12010129.

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For 50 years persistent cyanobacterial blooms have been observed in Lake Ludoš (Serbia), a wetland area of international significance listed as a Ramsar site. Cyanobacteria and cyanotoxins can affect many organisms, including valuable flora and fauna, such as rare and endangered bird species living or visiting the lake. The aim was to carry out monitoring, estimate the current status of the lake, and discuss potential resolutions. Results obtained showed: (a) the poor chemical state of the lake; (b) the presence of potentially toxic (genera Dolichospermum, Microcystis, Planktothrix, Chroococcus, Oscillatoria, Woronichinia and dominant species Limnothrix redekei and Pseudanabaena limnetica) and invasive cyanobacterial species Raphidiopsis raciborskii; (c) the detection of microcystin (MC) and saxitoxin (STX) coding genes in biomass samples; (d) the detection of several microcystin variants (MC-LR, MC-dmLR, MC-RR, MC-dmRR, MC-LF) in water samples; (e) histopathological alterations in fish liver, kidney and gills. The potential health risk to all organisms in the ecosystem and the ecosystem itself is thus still real and present. Although there is still no resolution in sight, urgent remediation measures are needed to alleviate the incessant cyanobacterial problem in Lake Ludoš to break this ecosystem out of the perpetual state of limbo in which it has been trapped for quite some time.

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Napiórkowska-Krzebietke, Agnieszka, Krystyna Kalinowska, Elżbieta Bogacka-Kapusta, Konrad Stawecki, and Piotr Traczuk. "Cyanobacterial Blooms and Zooplankton Structure in Lake Ecosystem under Limited Human Impact." Water 12, no. 5 (April 28, 2020): 1252. http://dx.doi.org/10.3390/w12051252.

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Cyanobacterial blooms are tightly related to increasing trophic conditions of lakes and climate warming. Abiotic and biotic parameters were studied in a shallow lake, in which the island with the largest cormorants colony in north-eastern Poland is situated. We hypothesized that the strongest cyanobacterial blooms will persist near the cormorant’s island and will decrease with an increasing distance from it. Filamentous cyanobacteria (Pseudanabaena, Planktolyngbya, Limnothrix, Planktothrix) were the main phytoplankton components during summer and autumn. Their strongest blooms (up to 66 mg L−1) were recorded near the roosting area. The content of nutrients and chlorophyll a, and the biomass of phytoplankton (primarily cyanobacteria) and zooplankton, decreased gradually with the increasing distance from the island. The changes from hypertrophic to eutrophic conditions were confirmed by a decrease in values of the trophic state index from 72 (site 1) to 58 (site 5). This all suggests that cormorants might have a significant impact on the deterioration of water quality (at distance to 1.6 km) and can contribute to faster water eutrophication. Our results suggest that protection of breeding sites for many waterbirds, such as cormorants, becomes a real threat for the functioning of aquatic ecosystems due to a large load of nutrients.

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Dembowska, Ewa A., and Szymon Józefowicz. "Seasonal changes in phytoplankton and bioindices in the southern part of Lake Jeziorak (NE Poland)." Oceanological and Hydrobiological Studies 44, no. 1 (January 1, 2015): 1–10. http://dx.doi.org/10.1515/ohs-2015-0001.

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AbstractThe structure of phytoplankton communities of Lake Jeziorak was presented for the first time. The objective of our research was qualitative and quantitative analysis and bioindices of phytoplankton during and outside the tourist season. Analysis of phytoplankton assemblages were performed in 2011-2012. A total of 96 taxa were identified in Lake Jeziorak, mainly: Cyanobacteria - 20, Bacillariophyceae - 49, and Chlorophyta − 19. Biomass of the phytoplankton varied from 10 mg l−1 in October to 29 mg l−1 in May. In the whole research period, Cyanobacteria dominated and represented up to 68% of the total biomass. The cyanobacterial blooms were constantly observed. Biomass in the summer period was composed of filamentous Aphanizomenon gracile, Limnothrix redekei, Planktothrix agardhii and Pseudanabaena limnetica. Outside the holiday season, i.e. in autumn and spring, filamentous Cyanobacteria accompanied cryptomonads in phytoplankton. The species composition, the biomass of phytoplankton, and TSI indicate the hypertrophic conditions of the lake. Phytoplankton in Lake Jeziorak was in a state of equilibrium for almost the entire study period. S1 was a dominant group and its abundance and biomass did not change by more than 10%. There was no significant direct effect of the seasonal tourism impact on the development of phytoplankton in Lake Jeziorak.

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Haghighi, Omid, Shahab Shahryari, Mojgan Ebadi, Sima Modiri, Hossein Shahbani Zahiri, Hadi Maleki, and Kambiz Akbari Noghabi. "Limnothrix sp. KO05: A newly characterized cyanobacterial biosorbent for cadmium removal: the enzymatic and non-enzymatic antioxidant reactions to cadmium toxicity." Environmental Toxicology and Pharmacology 51 (April 2017): 142–55. http://dx.doi.org/10.1016/j.etap.2017.03.008.

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Meffert, Maria-Elisabeth. "Planktic unsheathed filaments (Cyanophyceae) with polar and central gas vacuoles II. Biology, population dynamics and biotopes of Limnothrix redekei (VAN GOOR) MEFFERT." Archiv für Hydrobiologie 116, no. 3 (October 5, 1989): 257–82. http://dx.doi.org/10.1127/archiv-hydrobiol/116/1989/257.

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Moustaka-Gouni, Maria, Elisabeth Vardaka, and Eleni Tryfon. "Phytoplankton species succession in a shallow Mediterranean lake (L. Kastoria, Greece): steady-state dominance of Limnothrix redekei, Microcystis aeruginosa and Cylindrospermopsis raciborskii." Hydrobiologia 575, no. 1 (September 25, 2006): 129–40. http://dx.doi.org/10.1007/s10750-006-0360-4.

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Dziga, Dariusz, Nada Tokodi, Damjana Drobac, Mikołaj Kokociński, Adam Antosiak, Jakub Puchalski, Wojciech Strzałka, Mariusz Madej, Zorica Svirčev, and Jussi Meriluoto. "The Effect of a Combined Hydrogen Peroxide-MlrA Treatment on the Phytoplankton Community and Microcystin Concentrations in a Mesocosm Experiment in Lake Ludoš." Toxins 11, no. 12 (December 11, 2019): 725. http://dx.doi.org/10.3390/toxins11120725.

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Harmful cyanobacteria and their toxic metabolites constitute a big challenge for the production of safe drinking water. Microcystins (MC), chemically stable hepatotoxic heptapeptides, have often been involved in cyanobacterial poisoning incidents. A desirable solution for cyanobacterial management in lakes and ponds would eliminate both excess cyanobacteria and the MC that they potentially produce and release upon lysis. Hydrogen peroxide (H2O2) has recently been advocated as an efficient means of lysing cyanobacteria in lakes and ponds, however H2O2 (at least when used at typical concentrations) cannot degrade MC in environmental waters. Therefore, mesocosm experiments combining the cyanobacteria-lysing effect of H2O2 and the MC-degrading capacity of the enzyme MlrA were set up in the highly eutrophic Lake Ludoš (Serbia). The H2O2 treatment decreased the abundance of the dominant cyanobacterial taxa Limnothrix sp., Aphanizomenon flos-aquae, and Planktothrix agardhii. The intracellular concentration of MC was reduced/eliminated by H2O2, yet the reduction of the extracellular MC could only be accomplished by supplementation with MlrA. However, as H2O2 was found to induce the expression of mcyB and mcyE genes, which are involved in MC biosynthesis, the use of H2O2 as a safe cyanobacteriocide still requires further investigation. In conclusion, the experiments showed that the combined use of H2O2 and MlrA is promising in the elimination of both excess cyanobacteria and their MC in environmental waters.

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Bittner, Michal, Alja Štern, Marie Smutná, Klára Hilscherová, and Bojana Žegura. "Cytotoxic and Genotoxic Effects of Cyanobacterial and Algal Extracts—Microcystin and Retinoic Acid Content." Toxins 13, no. 2 (February 2, 2021): 107. http://dx.doi.org/10.3390/toxins13020107.

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In the last decade, it has become evident that complex mixtures of cyanobacterial bioactive substances, simultaneously present in blooms, often exert adverse effects that are different from those of pure cyanotoxins, and awareness has been raised on the importance of studying complex mixtures and chemical interactions. We aimed to investigate cytotoxic and genotoxic effects of complex extracts from laboratory cultures of cyanobacterial species from different orders (Cylindrospermopsis raciborskii, Aphanizomenon gracile, Microcystis aeruginosa, M. viridis, M. ichtyoblabe, Planktothrix agardhii, Limnothrix redekei) and algae (Desmodesmus quadricauda), and examine possible relationships between the observed effects and toxin and retinoic acid (RA) content in the extracts. The cytotoxic and genotoxic effects of the extracts were studied in the human hepatocellular carcinoma HepG2 cell line, using the MTT assay, and the comet and cytokinesis-block micronucleus (cytome) assays, respectively. Liquid chromatography electrospray ionization mass spectrometry (LC/ESI-MS) was used to detect toxins (microcystins (MC-LR, MC-RR, MC-YR) and cylindrospermopsin) and RAs (ATRA and 9cis-RA) in the extracts. Six out of eight extracts were cytotoxic (0.04–2 mgDM/mL), and five induced DNA strand breaks at non-cytotoxic concentrations (0.2–2 mgDM/mL). The extracts with genotoxic activity also had the highest content of RAs and there was a linear association between RA content and genotoxicity, indicating their possible involvement; however further research is needed to identify and confirm the compounds involved and to elucidate possible genotoxic effects of RAs.

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