Moina macrocopa demographic response to harmful cyanobacteria
Por:
Nandini, S., Araiza-Vazquez, D. A., Sarma S.S.S.
Publicada:
1 abr 2021
Categoría:
Aquatic science
Resumen:
The Virgilio Uribe Rowing Canal in Xochimilco, Mexico City has
cyanobacterial blooms throughout the year, often of the genus
Microcystis. Here we evaluated the demographic responses of Moina
macrocopa in the presence of cyanotoxins obtained by freezing and
sonication of blooms collected in June (2017), September (2017) and
March (2018). Acute toxicity tests (LC50) showed that the median lethal
concentration, on Moina macrocopa was 1.56, 1.30 and 2.56 mu g/L, in
June, September and March, respectively. The life table of M. macrocopa
was done using 5% and 10% of the LC50, fed on Scenedesmus acutus (0.5
x 10(6) cells/mL) with four replicates per treatment. We found that
cyanotoxins reduced the survival and fecundity of Moina macrocopa. The
population growth rates ranged from 0.27 and 0.49 d(-1) for the blooms
collected in June, 0.38 and 0.52 d(-1) for those of September and 0.42
and 0.52 d(-1) for the blooms in March. We found that most of the
cyanobacterial strains of the rowing canal are toxic and may have
adverse effects on humans exposed to them daily. (C) 2020 European
Regional Centre for Ecohydrology of the Polish Academy of Sciences.
Published by Elsevier B.V. All rights reserved.
Filiaciones:
Nandini, S.:
Laboratory of Aquatic Zoology, FES Iztacala, National Autonomous University of Mexico, Av. De los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, State of Mexico 54090, Mexico
Araiza-Vazquez, D. A.:
Laboratory of Aquatic Zoology, FES Iztacala, National Autonomous University of Mexico, Av. De los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, State of Mexico 54090, Mexico
Sarma S.S.S.:
Laboratory of Aquatic Zoology, FES Iztacala, National Autonomous University of Mexico, Av. De los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, State of Mexico 54090, Mexico
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