Spatio-temporal variation of cyanobacteria and cyanotoxins in public supply reservoirs of the semi-arid region of Brazil
Cyanobacteria and cyanotoxins in reservoirs of the semi-arid region
Accepted: 16 September 2019
HTML: 151
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Authors
Cyanobacteria harmful algal blooms (CyanoHABs) have become increasingly frequent and intense in public supply reservoirs as a result of eutrophication and global climate change. The semi-arid region of Brazil has a well documented history of CyanoHABs but the underlying factors that control the excessive proliferation of these organisms and the production of their bioactive secondary metabolites are not comprehensively understood. This study aimed to identify the environmental factors that explain the spatial and temporal variations in the abundance of cyanobacteria and the concentration of cyanotoxins (microcystins, saxitoxins, and cylindrospermopsin) in semi-arid reservoirs. The following hypotheses were tested: (a) the largest biovolumes of potential toxin producing cyanobacteria occur when cyanotoxin concentrations are highest; and (b) the environmental factors that explain variations in biovolume of cyanobacteria also explain changes in cyanotoxins concentrations. Samples were taken from four reservoirs located in the Northeast region of Brazil, over a three-month period (October 2016 and February and June 2017). Of the 24 species of cyanobacteria identified, 13 were potentially toxin-producing. Physicochemical variables such as water volume of the reservoir, water transparency, soluble reactive phosphorus, and total phosphorus explained the abundance of cyanobacteria and the levels of cyanotoxins. These results corroborate the hypothesis that similar physicochemical conditions influence the abundance and diversity of cyanobacteria and cyanotoxins. Cyanobacterial blooms composed of more than one potential toxin producing species were observed in the studied reservoirs, where potential microcystin-producing species were the most common. Microcystins and saxitoxins were detected in all the reservoirs studied, while cylindrospermopsin and the cyanobacterium Cylindrospermopsis raciborskii were simultaneously recorded in only one reservoir (Camalaú Reservoir). Cylindrospermopsin was only detected in a reservoir for the first time in the State of Paraíba. Canonical redundancy analysis showed that the cyanotoxins were related to potential toxin producing species. These results corroborate the proposed hypothesis that there is a correlation between cyanotoxins and the biomass of potential producers. Also, there were situations where cyanotoxins were detected without the presence of potential producers. These results demonstrate the need for reassessment of potential toxin producing species of cyanobacteria in semi-arid reservoirs. This may lead to the identification and characterization of novel producers of these bioactive secondary metabolites.
Edited by
Andrea Lami, CNR-IRSA Verbania, ItalyHow to Cite
Similar Articles
- Keqiang Shao, Tunasheng Ba, Boqiang Qin, Jianying Chao, Guang Gao, The prevalence of Atribacteria affiliated with JS1 in the sediment core of Lake Sayram, the largest alpine lake, China , Journal of Limnology: Vol. 82 (2023)
- Neal Michelutti, Jillian L. Lemmen, Colin A. Cooke, William O. Hobbs, Alexander P. Wolfe, John P. Smol, Erratum - Assessing the effects of climate and volcanism on diatom and chironomid assemblages in an Andean lake near Quito, Ecuador , Journal of Limnology: Vol. 75 No. 2 (2016)
- Maria Belen Sathicq, Tomasa Sbaffi, Giulia Borgomaneiro, Andrea Di Cesare, Raffaella Sabatino, The meiofauna as neglected carriers of antibiotic resistant and pathogenic bacteria in freshwater ecosystems , Journal of Limnology: Vol. 80 No. 3 (2021): Celebratory Issue - 80th Anniversary of the Journal of Limnology
- Ali Oveisy, Leon Boegman, One-dimensional simulation of lake and ice dynamics during winter , Journal of Limnology: Vol. 73 No. 3 (2014)
- Jérôme Kaiser, Bora Ön, Helge W. Arz, Sena Akçer-Ön, Sedimentary lipid biomarkers in the magnesium rich and highly alkaline Lake Salda (south-western Anatolia) , Journal of Limnology: Vol. 75 No. 3 (2016)
- Lucia Montes-Ortiz, Manuel Elias-Gutierrez, Faunistic survey of the zooplankton community in an oligotrophic sinkhole, Cenote Azul (Quintana Roo, Mexico), using different sampling methods, and documented with DNA barcodes , Journal of Limnology: Vol. 77 No. 3 (2018)
- Eliana A. Panarelli, Daryl L. Nielsen, Aleicia Holland, Cladocera resting egg banks in temporary and permanent wetlands , Journal of Limnology: Vol. 80 No. 1 (2021)
- Sujeephon Athibai, Hendrik Segers, La-orsri Sanoamuang, Diversity and distribution of Brachionidae (Rotifera) in Thailand, with a key to the species , Journal of Limnology: Vol. 72 No. s2 (2013): Freshwater Invertebrates of Southeast Asia
- Boris Lipták, Agata Mrugała, Ladislav Pekárik, Anton Mutkovič, Daniel Gruľa, Adam Petrusek, Antonín Kouba, Expansion of the marbled crayfish in Slovakia: beginning of an invasion in the Danube catchment? , Journal of Limnology: Vol. 75 No. 2 (2016)
- Angela Boggero, Lyudmila Kamburska, Silvia Zaupa, Marzia Ciampittiello, Daniele Paganelli, Marco Cifoni, Michela Rogora, Tiziana Di Lorenzo, Sampling and laboratory protocols to study the effects of water-level management on the littoral invertebrate fauna in deep and large temperate lakes , Journal of Limnology: Vol. 81 No. s2 (2022): Effects of water level management on lake littorals and downstream river areas
<< < 20 21 22 23 24 25 26 27 28 29 > >>
You may also start an advanced similarity search for this article.
-
Juliana dos Santos Severiano, Edlayne Rayanara Pontes de Lima, Daniely de Lucena-Silva, Dayrla Kelly Gomes Rocha, Maria Eduarda Santana Veríssimo, Bruno Renaly Souza Figueiredo, José Etham de Lucena Barbosa, Joseline MolozziWater Research : 2023
-
Thiago Santos de Almeida Lopes, Amanda Myrna de Meneses e Costa, Whelton Brito dos Santos, Weruska Brasileiro Ferreira, Patricia Herminio CunhaCadernos Técnicos Engenharia Sanitária e Ambiental : 2023
-
Ranielle Daiana dos Santos-Silva, Juliana dos Santos Severiano, Mathias Ahii Chia, Tatiane Medeiros Queiroz, Micheline Kézia Cordeiro-Araújo, José Etham de Lucena BarbosaEnvironmental Pollution : 2024
-
Flávia Morgana Monteiro, Gustavo Correia de Moura, Juliana dos Santos Severiano, Camila Ferreira Mendes, José Etham de Lucena BarbosaAquatic Ecology : 2021
-
Andreia Souza Regis, Ronaldo Faustino da Silva , Fabio Henrique Portella Corrêa de Oliveira, Eduardo José Alécio de OliveiraRevista de Gestão Social e Ambiental : 2024