Intensification of marine dinoflagellates blooms in Uruguay
The economic losses and health problems caused by Harmful Algal Blooms (HAB) make their understanding fundamental. While the debate continues over whether increased reporting is due to improved monitoring activity or a real increase, HAB are expanding worldwide and they are expected to increase as a...
| Published in: | INNOTEC |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | Spanish |
| Published: |
Laboratorio Tecnológico del Uruguay - LATU
2017
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| Subjects: | |
| Online Access: | https://ojs.latu.org.uy/index.php/INNOTEC/article/view/403 https://doi.org/10.26461/13.02 |
| Summary: | The economic losses and health problems caused by Harmful Algal Blooms (HAB) make their understanding fundamental. While the debate continues over whether increased reporting is due to improved monitoring activity or a real increase, HAB are expanding worldwide and they are expected to increase as a result of climate change due to increased sea surface temperature, increased stratification, ocean acidification and eutrophication, mainly in coastal areas. Uruguay I no exception to this trend and in recent years has shown an increase in the intensity of some blooms (higher density and duration), but without changes in its frequency. Species that commonly produced blooms nowadays do so with higher abundance (106 cells / l) and duration (between three and five weeks). The same is occurring with toxic species (e.g. Dinophysis cf. acuminata) determining an extension in time of the mollusks bans, with a maximum of 189 days during 2015. The increase in both space and time of these blooms could be associated with an increase in temperature and nutrient concentration. Las pérdidas económicas y problemas de salud ocasionados por las Floraciones Algales Nocivas (FAN) hacen fundamental su comprensión. Mientras continúa el debate sobre si el aumento de los reportes se debe a mayor actividad de monitoreo o a un incremento real en su ocurrencia, los problemas causados por las FAN están creciendo mundialmente. Se espera que las FAN aumenten a causa del cambio climático por un incremento en la temperatura superficial del mar, mayor estratificación, acidificación del océano y eutrofización, principalmente en las zonas costeras. Uruguay no escapa a esa tendencia y en los últimos años ha mostrado un incremento en la intensidad de algunas floraciones (mayor densidad y duración), aunque sin cambios en su frecuencia. Especies que comúnmente producían floraciones en la actualidad lo hacen con mayor abundancia (106 cél /l) y duración (entre 3 y 5 semanas). Lo mismo ocurre con algunas especies tóxicas (i.e. Dinophysis cf. acuminata) ... |
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