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| Natura: | Artículo científico |
| Lingua: | es |
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Sociedad de Biología de Chile
2016
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=369944970010 |
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| _version_ | 1866814928201973760 |
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| author | Viviana Almanza |
| author_facet | Viviana Almanza |
| contents | Occurrence of toxic blooms of Microcystis aeruginosa in a central Chilean (36° Lat. S) urban lake Viviana Almanza Oscar Parra Carlos E. De M. Bicudo Carolina Baeza Johana Beltran Ricardo Figueroa Roberto Urrutia Biología Chile Lago urbano Microcistina Eutrofización Microcystis aeruginosa Background: During the last decades the frequency and global distribution of toxic cyanobacteria blooms has increased globally, which has been attributed to the eutrophication and climate change. In Chile there have been reports on blooms in aquatic ecosystem in localities with high density population and on the presence of five congeners of microcystins but only two documented toxics blooms with hundreds fish kills. We investigated the presence of toxic cyanobacteria blooms in the Lo Galindo urban lake, Concepción city, and the environmental factors that influence the abundance of cyanobacteria and microcystins concentration. Lo Galindo Lake, is used for various recreational and eventually as a drinking water source. Results: Toxic blooms of Microcystis aeruginosa are developed in Lo Galindo lake, those that occur throughout the year in a wide range of environmental conditions, forming scums blooms during summer and dispersive blooms in all seasons. There are different microcystin congeners, the most frequent congener was MC-RR (21 %) and the highest concentration corresponded to 115.4 μg L-1 MC-LR. Conclusions: The dominance and development of the M. aeruginosa blooms in the lake is determined by various environmental factors such as temperature, nutrients, diversity of taxa and wind speed that affect the formation of disperse-type blooms and/or scums; the latter are developed only in summer, coinciding with the highest temperature and concentrations of total microcystins. In the lake the microcystin and different types of congener is highly variable, so special care is recommended to use lake water for consumption and for recreational activities. The emergence and persistence of Microcystis blooms in this body of water are considered a potential health risk for the inhabitants of the area, considering the proximity and the system use by the inhabitants. Keywords: Microcystin, Microcystis aeruginosa, Scums blooms, Dispersive blooms, Eutrophication, Urban lake, Chile. 2016 artículo científico 0716-078X https://www.redalyc.org/articulo.oa?id=369944970010 es http://www.redalyc.org/revista.oa?id=3699 Revista Chilena de Historia Natural application/pdf Sociedad de Biología de Chile Revista Chilena de Historia Natural (Chile) Vol.89 |
| format | Artículo científico |
| id | redalyc_369944970010 |
| language | es |
| publishDate | 2016 |
| publisher | Sociedad de Biología de Chile |
| spellingShingle | Occurrence of toxic blooms of Microcystis aeruginosa in a central Chilean (36° Lat. S) urban lake Viviana Almanza Biología Chile Lago urbano Microcistina Eutrofización Microcystis aeruginosa Occurrence of toxic blooms of Microcystis aeruginosa in a central Chilean (36° Lat. S) urban lake Viviana Almanza Oscar Parra Carlos E. De M. Bicudo Carolina Baeza Johana Beltran Ricardo Figueroa Roberto Urrutia Biología Chile Lago urbano Microcistina Eutrofización Microcystis aeruginosa Background: During the last decades the frequency and global distribution of toxic cyanobacteria blooms has increased globally, which has been attributed to the eutrophication and climate change. In Chile there have been reports on blooms in aquatic ecosystem in localities with high density population and on the presence of five congeners of microcystins but only two documented toxics blooms with hundreds fish kills. We investigated the presence of toxic cyanobacteria blooms in the Lo Galindo urban lake, Concepción city, and the environmental factors that influence the abundance of cyanobacteria and microcystins concentration. Lo Galindo Lake, is used for various recreational and eventually as a drinking water source. Results: Toxic blooms of Microcystis aeruginosa are developed in Lo Galindo lake, those that occur throughout the year in a wide range of environmental conditions, forming scums blooms during summer and dispersive blooms in all seasons. There are different microcystin congeners, the most frequent congener was MC-RR (21 %) and the highest concentration corresponded to 115.4 μg L-1 MC-LR. Conclusions: The dominance and development of the M. aeruginosa blooms in the lake is determined by various environmental factors such as temperature, nutrients, diversity of taxa and wind speed that affect the formation of disperse-type blooms and/or scums; the latter are developed only in summer, coinciding with the highest temperature and concentrations of total microcystins. In the lake the microcystin and different types of congener is highly variable, so special care is recommended to use lake water for consumption and for recreational activities. The emergence and persistence of Microcystis blooms in this body of water are considered a potential health risk for the inhabitants of the area, considering the proximity and the system use by the inhabitants. Keywords: Microcystin, Microcystis aeruginosa, Scums blooms, Dispersive blooms, Eutrophication, Urban lake, Chile. 2016 artículo científico 0716-078X https://www.redalyc.org/articulo.oa?id=369944970010 es http://www.redalyc.org/revista.oa?id=3699 Revista Chilena de Historia Natural application/pdf Sociedad de Biología de Chile Revista Chilena de Historia Natural (Chile) Vol.89 |
| title | Occurrence of toxic blooms of Microcystis aeruginosa in a central Chilean (36° Lat. S) urban lake |
| topic | Biología Chile Lago urbano Microcistina Eutrofización Microcystis aeruginosa |
| url | https://www.redalyc.org/articulo.oa?id=369944970010 |