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
- Peifang Wang, Lingxiao Ren, Chao Wang, Jin Qian, Jun Hou, Presence and patterns of alkaline phosphatase activity and phosphorus cycling in natural riparian zones under changing nutrient conditions , Journal of Limnology: Vol. 74 No. 1 (2015)
- Walter Finsinger, Thierry Fonville, Emiliya Kirilova, Andrea Lami, Piero Guilizzoni, André F. Lotter, A long-term multi-proxy record of varved sediments highlights climate-induced mixing-regime shift in a large hard-water lake ~5000 years ago , Journal of Limnology: Vol. 73 No. 2 (2014)
- Kay Van Damme, Supiyanit Maiphae, Phannee Sa-Ardrit, Inland swamps in South East Asia harbour hidden cladoceran diversities: species richness and the description of new paludal Chydoridae (Crustacea: Branchiopoda: Cladocera) from Southern Thailand , Journal of Limnology: Vol. 72 No. s2 (2013): Freshwater Invertebrates of Southeast Asia
- Roberto Bertoni, Martino Bertoni, Giuseppe Morabito, Michela Rogora, Cristiana Callieri, A non-deterministic approach to forecasting the trophic evolution of lakes , Journal of Limnology: Vol. 75 No. s1 (2016): Proceedings of the 6th National Congress of Limnology
- Wei Xiong, Ping Xie, Shengrui Wang, Yuan Niu, Xi Yang, Wenjie Chen, Sources of organic matter affect depth-related microbial community composition in sediments of Lake Erhai, Southwest China , Journal of Limnology: Vol. 74 No. 2 (2015)
- Mircea Alexe, Gheorghe Șerban, Andreea Baricz, Adrian-Ștefan Andrei, Adorján Cristea, Karina P. Battes, Mirela Cîmpean, Laura Momeu, Vasile Muntean, Sebastian A. Porav, Horia L. Banciu, Limnology and plankton diversity of salt lakes from Transylvanian Basin (Romania): A review , Journal of Limnology: Vol. 77 No. 1 (2018)
- Ning Chen, Ling Liu, Yanfeng Li, Danying Qiao, Yuanpo Li, Ying Zhang, Yiyan Lv, Morphology-based classification of functional groups for potamoplankton , Journal of Limnology: Vol. 74 No. 3 (2015)
- Pranay Sharma, Alexey A. Kotov, Establishment of Chydorus sphaericus (O.F. Muller, 1785) (Crustacea: Cladocera) in Australia: consequences of mass fish stocking from Northern Europe? , Journal of Limnology: Vol. 74 No. 2 (2015)
- Jascieli Carla Bortolini, Sueli Train, Luzia Cleide Rodrigues, The variability in the hydrosedimentological regime supports high phytoplankton diversity in floodplain: A 12-year survey of the Upper Paraná River , Journal of Limnology: Vol. 76 No. 3 (2017)
- Selene Babini, Luciana Cibils Martina, Elisa Luque, Noemi Gari, Nancy Salas, Adolfo L. Martino, Anuran larvae diet from agroecosystem’s ponds: environmental quality and implications for their populations , Journal of Limnology: Vol. 76 No. 1 (2017)
<< < 9 10 11 12 13 14 15 16 17 18 > >>
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