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Article

No Clear Response in the Stormwater Phytoplankton Community to Biocide Contamination

1
Department of the Built Environment, Aalborg University, Thomas Manns Vej 23, 9220 AalborgØ, Denmark
2
NIRAS, Ceres Allé 3, 8000 Aarhus, Denmark
*
Author to whom correspondence should be addressed.
Water 2020, 12(11), 3120; https://doi.org/10.3390/w12113120
Received: 20 September 2020 / Revised: 27 October 2020 / Accepted: 3 November 2020 / Published: 7 November 2020
(This article belongs to the Section Urban Water Management)
This study investigated the responses of natural phytoplankton communities of an urban stormwater pond to biocide contamination. The biocides carbendazim, terbutryn, diuron, and irgarol 1051, and their mixture, were used in two laboratory microcosm and one outdoor mesocosm studies at concentrations of 10, 100, and 1000 ng L−1. The water samples were collected in a pond receiving significant biocide contamination. The mesocosm study was carried out in the same pond. The phytoplankton community response was evaluated after 10–15 days of exposure, with respect to its taxonomic composition, abundance and biovolume. No significant changes were observed in any of the experiments. Only at the highest applied terbutryn concentration were lower numbers of taxa identified in both microcosm and mesocosm experiments. Additionally, increases in Chlorophyta abundance and biovolume, along with an increase in irgarol concentration, were observed throughout the three experiments. Nevertheless, the statistical analysis did not confirm any significant differences among the biocide treatments. These results suggest that the biocide concentrations probably were below the harmful or toxic threshold to the stormwater pond phytoplankton. On the other hand, as the investigated pond phytoplankton taxa face biocide inputs throughout the year, they could have already adapted to the tested biocide contamination. View Full-Text
Keywords: algae taxonomic diversity; stormwater ponds; carbendazim; diuron; terbutryn; irgarol algae taxonomic diversity; stormwater ponds; carbendazim; diuron; terbutryn; irgarol
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MDPI and ACS Style

Minelgaite, G.; Stephansen, D.A.; Simon, M.; Fejerskov, M.L.; Vollertsen, J. No Clear Response in the Stormwater Phytoplankton Community to Biocide Contamination. Water 2020, 12, 3120. https://doi.org/10.3390/w12113120

AMA Style

Minelgaite G, Stephansen DA, Simon M, Fejerskov ML, Vollertsen J. No Clear Response in the Stormwater Phytoplankton Community to Biocide Contamination. Water. 2020; 12(11):3120. https://doi.org/10.3390/w12113120

Chicago/Turabian Style

Minelgaite, Greta; Stephansen, Diana A.; Simon, Márta; Fejerskov, Morten L.; Vollertsen, Jes. 2020. "No Clear Response in the Stormwater Phytoplankton Community to Biocide Contamination" Water 12, no. 11: 3120. https://doi.org/10.3390/w12113120

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