Ocurrencia de floraciones nocivas de microalgas en las costas del estado Miranda, Venezuela
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Environment
red tide
harmful algal Bloom
Ostreopsis
Venezuela
ambiente
floración algal nociva
marea roja
Ostreopsis
Venezuela
red tide
harmful algal Bloom
Ostreopsis
Venezuela
ambiente
floración algal nociva
marea roja
Ostreopsis
Venezuela
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Journal ISSN
Volume Title
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Instituto Tecnológico de Santo Domingo (INTEC)
En comunidades de la costa central de Venezuela, ocurren intoxicaciones masivas, que ocasionan mortandad de peces y efectos sobre la salud de personas y animales domésticos. Para entender la dinámica de estos fenómenos, se requiere conocer la estructura comunitaria del fitoplancton durante los eventos. Con apoyo de la comunidad, se captaron muestras de fitoplancton durante tres intoxicaciones masivas ocurridas en los años 2010, 2014 y 2015 y se determinaron variables fisicoquímicas del agua. Como resultado, se obtuvo una comunidad diversa con presencia de diatomeas, dinoflagelados, cianobacterias y euglenofitas con diferencias significativas en la composición durante cada evento. Sin embargo, en las tres intoxicaciones masivas coincide un sobrecrecimiento de dinoflagelados del género Ostreopsis acompañado de la euglenofita Eutreptiella gymnastica, ampliamente conocidos por sus efectos tóxicos en floraciones algales cuando alcanzan densidades superiores a 1.000 células/litro. Al comparar, estas condiciones con aquellas en la que no hay intoxicación, se puede observar que la proporción de la densidad de Ostreopsis con respecto al resto de los dinoflagelados, sobrepasa el 50 %, lo cual pudiera servir de indicador durante las floraciones algales nocivas de estas especies.
In communities on the central coast of Venezuela, massive poisonings occur that cause fish mortality and effects on the health of people and domestic animals. To understand the dynamics of these phenomena, it is necessary to know the community structure of phytoplankton during events. With the support of the community, samples of phytoplankton were collected during three massive poisonings that occurred in 2010, 2014 and 2015. And also, physicochemical variables of the water were determined. As a result, a diverse community was obtained with the presence of diatoms, dinoflagellates, cyanobacteria, and euglenophytes with significant differences in the composition in each event. However, in the three massive poisonings, an overgrowth of dinoflagellates of the genus Ostreopsis coincides, accompanied by the euglenophyte Eutreptiella gymnastica, which are widely known for their toxic effects on algal blooms when they reach densities greater than 1,000 cell/liter. When comparing these conditions with those in which there is no intoxication, it can be seen that the proportion of the density of Ostreopsis spp with respect to the rest of the dinoflagellates exceeds 50%, which could serve as an indicator during harmful algal blooms of these species.
In communities on the central coast of Venezuela, massive poisonings occur that cause fish mortality and effects on the health of people and domestic animals. To understand the dynamics of these phenomena, it is necessary to know the community structure of phytoplankton during events. With the support of the community, samples of phytoplankton were collected during three massive poisonings that occurred in 2010, 2014 and 2015. And also, physicochemical variables of the water were determined. As a result, a diverse community was obtained with the presence of diatoms, dinoflagellates, cyanobacteria, and euglenophytes with significant differences in the composition in each event. However, in the three massive poisonings, an overgrowth of dinoflagellates of the genus Ostreopsis coincides, accompanied by the euglenophyte Eutreptiella gymnastica, which are widely known for their toxic effects on algal blooms when they reach densities greater than 1,000 cell/liter. When comparing these conditions with those in which there is no intoxication, it can be seen that the proportion of the density of Ostreopsis spp with respect to the rest of the dinoflagellates exceeds 50%, which could serve as an indicator during harmful algal blooms of these species.
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info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:eu-repo/semantics/publishedVersion
Artículos
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Science, Environment and Climate; Vol. 3 No. 1 (2020): Science, Environment and Climate; 55-71
Ciencia, Ambiente y Clima; Vol. 3 Núm. 1 (2020): Ciencia, Ambiente y Clima; 55-71
2636-2333
2636-2317
10.22206/cac.2020.v3i1
Ciencia, Ambiente y Clima; Vol. 3 Núm. 1 (2020): Ciencia, Ambiente y Clima; 55-71
2636-2333
2636-2317
10.22206/cac.2020.v3i1