Comparative assessment of single and joint effects of diuron and Irgarol 1051 on Arctic and temperate microalgae using chlorophyll a fluorescence imaging
Type
ArticleAuthors
Kottuparambil, SreejithBrown, Murray T.
Park, Jihae
Choi, Soyeon
Lee, Hojun
Choi, Han-Gu
Depuydt, Stephen
Han, Taejun
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionRed Sea Research Center (RSRC)
Date
2017-02-06Online Publication Date
2017-02-06Print Publication Date
2017-05Permanent link to this record
http://hdl.handle.net/10754/622887
Metadata
Show full item recordAbstract
Ship groundings and ice-breakers can cause pollution of the polar environment with antifouling biocides such as diuron and Irgarol 1051. The present study used pulse amplitude modulated fluorometry to compare single and joint toxicities of diuron and Irgarol 1051 on two freshwater taxa of microalgae (Chlorella and Chlamydomonas) originating from Arctic and temperate regions. 30min acute toxicity tests using chlorophyll a (Chl a) fluorescence revealed that Arctic strains of microalgae were more sensitive to herbicides than their temperate counterparts. Diuron and Irgarol 1051 had equal toxicities in the Arctic species, while Irgarol 1051 was more toxic (EC50=5.55–14.70μgL−1) than diuron (EC50=12.90–>40μgL−1) in the temperate species. Toxicity assessment of various mixtures of diuron and Irgarol 1051 revealed antagonistic, additive, and synergistic effects. Our data suggest that herbicides can adversely affect photosynthesis in Arctic microalgae at relatively low levels, and their impact can increase under complex mixture conditions.Citation
Kottuparambil S, Brown MT, Park J, Choi S, Lee H, et al. (2017) Comparative assessment of single and joint effects of diuron and Irgarol 1051 on Arctic and temperate microalgae using chlorophyll a fluorescence imaging. Ecological Indicators 76: 304–316. Available: http://dx.doi.org/10.1016/j.ecolind.2017.01.024.Sponsors
The study was financially supported by Incheon National University (2012). Thanks are due to the Editor and the anonymous reviewers for their valuable and constructive comments.Publisher
Elsevier BVJournal
Ecological IndicatorsAdditional Links
http://www.sciencedirect.com/science/article/pii/S1470160X17300304ae974a485f413a2113503eed53cd6c53
10.1016/j.ecolind.2017.01.024