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Open AccessArticle

Cyanobacterial Blooms in Lake Varese: Analysis and Characterization over Ten Years of Observations

1
European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy
2
Agenzia Regionale per la Protezione dell’Ambiente della Lombardia, Regione Lombardia, 21100 Varese, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(3), 675; https://doi.org/10.3390/w12030675
Received: 30 November 2019 / Revised: 12 February 2020 / Accepted: 19 February 2020 / Published: 1 March 2020
(This article belongs to the Special Issue Advancing Knowledge on Cyanobacterial Blooms in Freshwaters)
Cyanobacteria blooms are a worldwide concern for water bodies and may be promoted by eutrophication and climate change. The prediction of cyanobacterial blooms and identification of the main triggering factors are of paramount importance for water management. In this study, we analyzed a comprehensive dataset including ten-years measurements collected at Lake Varese, an eutrophic lake in Northern Italy. Microscopic analysis of the water samples was performed to characterize the community distribution and dynamics along the years. We observed that cyanobacteria represented a significant fraction of the phytoplankton community, up to 60% as biovolume, and a shift in the phytoplankton community distribution towards cyanobacteria dominance onwards 2010 was detected. The relationships between cyanobacteria biovolume, nutrients, and environmental parameters were investigated through simple and multiple linear regressions. We found that 14-days average air temperature together with total phosphorus may only partly explain the cyanobacteria biovolume variance at Lake Varese. However, weather forecasts can be used to predict an algal outbreak two weeks in advance and, eventually, to adopt management actions. The prediction of cyanobacteria algal blooms remains challenging and more frequent samplings, combined with the microscopy analysis and the metagenomics technique, would allow a more conclusive analysis. View Full-Text
Keywords: freshwater; cyanobacteria; bloom; air temperature; nutrients; model freshwater; cyanobacteria; bloom; air temperature; nutrients; model
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MDPI and ACS Style

Chirico, N.; António, D.C.; Pozzoli, L.; Marinov, D.; Malagó, A.; Sanseverino, I.; Beghi, A.; Genoni, P.; Dobricic, S.; Lettieri, T. Cyanobacterial Blooms in Lake Varese: Analysis and Characterization over Ten Years of Observations. Water 2020, 12, 675. https://doi.org/10.3390/w12030675

AMA Style

Chirico N, António DC, Pozzoli L, Marinov D, Malagó A, Sanseverino I, Beghi A, Genoni P, Dobricic S, Lettieri T. Cyanobacterial Blooms in Lake Varese: Analysis and Characterization over Ten Years of Observations. Water. 2020; 12(3):675. https://doi.org/10.3390/w12030675

Chicago/Turabian Style

Chirico, Nicola; António, Diana C.; Pozzoli, Luca; Marinov, Dimitar; Malagó, Anna; Sanseverino, Isabella; Beghi, Andrea; Genoni, Pietro; Dobricic, Srdan; Lettieri, Teresa. 2020. "Cyanobacterial Blooms in Lake Varese: Analysis and Characterization over Ten Years of Observations" Water 12, no. 3: 675. https://doi.org/10.3390/w12030675

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