Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer

Several reports suggested that rice seedling nursery-box application of some systemic insecticides (neonicotinoids and fipronil) is the cause of the decline in dragonfly species noted since the 1990s in Japan. We conducted paddy mesocosm experiments to investigate the effect of the systemic insectic...

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Main Authors:	Kasai, Atsushi, Hayashi, Takehiko I., Ohnishi, Hitoshi, Suzuki, Kazutaka, Hayasaka, Daisuke, Goka, Koichi
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793285/

id	pubmed-4793285
recordtype	oai_dc
spelling	pubmed-47932852016-03-17 Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer Kasai, Atsushi Hayashi, Takehiko I. Ohnishi, Hitoshi Suzuki, Kazutaka Hayasaka, Daisuke Goka, Koichi Article Several reports suggested that rice seedling nursery-box application of some systemic insecticides (neonicotinoids and fipronil) is the cause of the decline in dragonfly species noted since the 1990s in Japan. We conducted paddy mesocosm experiments to investigate the effect of the systemic insecticides clothianidin, fipronil and chlorantraniliprole on rice paddy field biological communities. Concentrations of all insecticides in the paddy water were reduced to the limit of detection within 3 months after application. However, residuals of these insecticides in the paddy soil were detected throughout the experimental period. Plankton species were affected by clothianidin and chlorantraniliprole right after the applications, but they recovered after the concentrations decreased. On the other hand, the effects of fipronil treatment, especially on Odonata, were larger than those of any other treatment. The number of adult dragonflies completing eclosion was severely decreased in the fipronil treatment. These results suggest that the accumulation of these insecticides in paddy soil reduces biodiversity by eliminating dragonfly nymphs, which occupy a high trophic level in paddy fields. Nature Publishing Group 2016-03-16 /pmc/articles/PMC4793285/ /pubmed/26979488 http://dx.doi.org/10.1038/srep23055 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Kasai, Atsushi Hayashi, Takehiko I. Ohnishi, Hitoshi Suzuki, Kazutaka Hayasaka, Daisuke Goka, Koichi
spellingShingle	Kasai, Atsushi Hayashi, Takehiko I. Ohnishi, Hitoshi Suzuki, Kazutaka Hayasaka, Daisuke Goka, Koichi Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
author_facet	Kasai, Atsushi Hayashi, Takehiko I. Ohnishi, Hitoshi Suzuki, Kazutaka Hayasaka, Daisuke Goka, Koichi
author_sort	Kasai, Atsushi
title	Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
title_short	Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
title_full	Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
title_fullStr	Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
title_full_unstemmed	Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
title_sort	fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer
description	Several reports suggested that rice seedling nursery-box application of some systemic insecticides (neonicotinoids and fipronil) is the cause of the decline in dragonfly species noted since the 1990s in Japan. We conducted paddy mesocosm experiments to investigate the effect of the systemic insecticides clothianidin, fipronil and chlorantraniliprole on rice paddy field biological communities. Concentrations of all insecticides in the paddy water were reduced to the limit of detection within 3 months after application. However, residuals of these insecticides in the paddy soil were detected throughout the experimental period. Plankton species were affected by clothianidin and chlorantraniliprole right after the applications, but they recovered after the concentrations decreased. On the other hand, the effects of fipronil treatment, especially on Odonata, were larger than those of any other treatment. The number of adult dragonflies completing eclosion was severely decreased in the fipronil treatment. These results suggest that the accumulation of these insecticides in paddy soil reduces biodiversity by eliminating dragonfly nymphs, which occupy a high trophic level in paddy fields.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793285/
_version_	1613552402966773760

Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer

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