NDLI: Algicidal activity of the thiazolidinedione derivative TD49 against the harmful dinoflagellate Heterocapsa circularisquama in a mesocosm enclosure

Content Provider	Springer Nature Link
Author	Baek, Seung Ho Son, Moonho Bae, Si Woo Shin, Kyoungsoon Na, Dong Hee Cho, Hoon Yamaguchi, Mineo Kim, Young Ok Kim, Si Wouk
Copyright Year	2012
Abstract	To assess the algicidal effects of the thiazolidinedione derivative TD49 on the unarmored dinoflagellate Heterocapsa circularisquama and to evaluate the response of the planktonic community and the environment to this chemical, we undertook mesocosm (1,300 L) and small-scale experiments. The reduction ratio for H. circularisquama in each experiment was dependent on the concentration of TD49. At a TD49 concentration >0.4 μM, the abundance of H. circularisquama decreased by 99 % in the small-scale experiment and by 84 % in the mesocosm during the initial 2 days. At 0.2 μM TD49, the abundance of H. circularisquama decreased by up to 85 % in the small-scale experiment, whereas the abundance in the mesocosm increased, implying the absence of an algicidal effect. The decrease in planktonic organisms, including H. circularisquama, following TD49 treatment was correlated with abrupt declines in culture pH and dissolved oxygen concentration. Following addition of TD49, there was a significant increase in the abundance of diatoms and cryptophyta species, and after 8 days, the dominant species in the TD49 treatments shifted to small pennate diatoms including Cylindrotheca and Entomoneis species. The growth of some species among the zooplankton community was promoted at low TD49 concentrations (≤0.4 μM), whereas high concentrations (≥1.0 μM) had a negative effect. This study demonstrates that TD49 is an effective agent for the control for H. circularisquama blooms and that large-scale mesocosms play a crucial role in assessing the application of algicides such as TD49 in natural environments.
Starting Page	1555
Ending Page	1565
Page Count	11
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	25
Issue Number	5
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thiazolidinedione derivative TD49 Heterocapsa circularisquama Dinoflagellate Mesocosm Algicidal effect Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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