naa a22 4500 51074933X CHVBK 20180411083058.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11270-013-1593-2 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1593-2 First Report of Microcystins and Anatoxin-a Co-occurrence in San Roque Reservoir (Córdoba, Argentina) [Elektronische Daten] [Marcia Ruiz, Lucas Galanti, Ana Ruibal, María Rodriguez, Daniel Wunderlin, María Amé] The aim of this study was to evaluate the presence of microcystin-LR, microcystin-RR, microcystin-YR, and the neurotoxin anatoxin-a in water samples collected monthly during 1year in San Roque reservoir (Córdoba, Argentina) to identify the environmental factors that could promote the presence of these cyanotoxins. The HPLC-UV and MS/MS analysis showed the presence of microcystin in most of the sampling times, even when Cyanobacteria were subdominant. Microcystin concentrations varied from not detectable levels to 119.0μgL−1. Thus, they frequently surpassed the guidelines suggested by WHO for drinking water (1μgL−1) and recreational exposure (20μgL−1). To the extent of our knowledge, this is the first report of anatoxin-a in freshwaters in South America. Anatoxin-a concentrations varied from not detectable levels to 6.6ngL−1, a thousand times below the provisional guideline adopted by New Zealand for drinking water. Microcystin showed significant correlation with Microcystis and Pseudoanabaena while anatoxin-a correlated with Oscillatoria and Anabaena counts. Linear discriminant analysis showed that higher pH levels and more variable chlorophyll-a concentrations were measured in San Roque reservoir when cyanotoxins were present. Lower inorganic nitrogen concentrations were observed in autumn, when the prevalence of Anabaena became significant in Cyanobacteria composition and highest anatoxin-a levels were measured. The observed dynamic of phytoplankton going together with the cyanotoxins occurrence could be explained by the hypothesis of cyanotoxins acting as allelopathic compounds. The microcystin levels measured plus the presence of anatoxin-a show the need of stronger management efforts to preserve human and wildlife health. Springer Science+Business Media Dordrecht, 2013 Cyanotoxins nationallicence HPLC-MS/MS nationallicence Neurotoxins nationallicence Hepatotoxins nationallicence Environmental factors nationallicence Ruiz Marcia Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut Galanti Lucas Facultad de Ciencias Químicas-CIBICI, Universidad Nacional de Córdoba—CONICET, Haya de la Torre esq. Medina Allende, 5000, Córdoba, Argentina aut Ruibal Ana Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut Rodriguez María Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut Wunderlin Daniel Facultad Ciencias Químicas-ICYTAC, Universidad Nacional de Córdoba—CONICET, Av. Juan Filloy s/n, Ciudad Universitaria, 5000, Córdoba, Argentina aut Amé María Facultad de Ciencias Químicas-CIBICI, Universidad Nacional de Córdoba—CONICET, Haya de la Torre esq. Medina Allende, 5000, Córdoba, Argentina aut Water, Air, & Soil Pollution Springer Netherlands 224/6(2013-06-01), 1-17 0049-6979 224:6<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1593-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1593-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ruiz Marcia Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Galanti Lucas Facultad de Ciencias Químicas-CIBICI, Universidad Nacional de Córdoba—CONICET, Haya de la Torre esq. Medina Allende, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Ruibal Ana Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Rodriguez María Instituto Nacional del Agua-Centro de la Región Semiárida, Ambrosio Olmos 1142, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Wunderlin Daniel Facultad Ciencias Químicas-ICYTAC, Universidad Nacional de Córdoba—CONICET, Av. Juan Filloy s/n, Ciudad Universitaria, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Amé María Facultad de Ciencias Químicas-CIBICI, Universidad Nacional de Córdoba—CONICET, Haya de la Torre esq. Medina Allende, 5000, Córdoba, Argentina aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/6(2013-06-01), 1-17 0049-6979 224:6<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer