NDLI: Initial recolonization of benthic fauna in defaunated sediment contaminated with octylphenol: Field microcosm exposure study

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Initial recolonization of benthic fauna in defaunated sediment contaminated with octylphenol: Field microcosm exposure study

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Toxicology and Environmental Health Sciences : Volume 1

Initial recolonization of benthic fauna in defaunated sediment contaminated with octylphenol: Field microcosm exposure study

Content Provider	Springer Nature Link
Author	Ryu, Jongseong Kim, Chan Kook Khim, Jong Seong Park, Kun Ho Lee, Chang Hoon Lee, Jong Hyeon Moon, Seong Dae Lee, Jung Suk Shim, Won Joon Lim, Un Hyuk Hong, Sang Hee Song, Sung Joon Lee, Kyu Tae
Copyright Year	2010
Abstract	Recolonization of benthic fauna in defaunated sediment contaminated with octylphenol (OP) has been investigated by the use ofin situ microcosm exposure study. Trays with defaunated sediment (control) and those treated with five OP concentrations (0.59, 5.4, 7.6, 66, and 660 μg g$^{−1}$, sediment dry weight (DW)) were exposed at the subtidal (ca. 10 m), in the southern coast of Korea, over two months. The initial response (after one-month exposure) of macrozoobenthos at the trays of control and three lower OP (0.59–7.6 μg g$^{−1}$ DW) showed rapid colonization of macrozoobenthos with high diversity and abundance. However, the species number sharply decreased after two-month exposure, particularly at the tray of greatest OP (660 μg g$^{−1}$ DW) treated with species number from 15 (after 30-days) to 3 (after 70-days). Other univariate indices such as abundance and biomass of benthic macrofauna also showed concentration-and time-dependent declines, indicating a potential adverse effect of OP on benthic community recolonization. Further, the multi-dimensional scaling (MDS) analysis that clearly separated two distinct faunal groups of macrobenthos during exposure supported the concentration-dependant recolonization followed by succession at the OP concentration of >7.6 μg g$^{−1}$ DW. Similar to macrofauna, the meiofaunal abundance significantly decreased at the OP concentration of >7.6 μg g$^{−1}$ DW, indicating certain threshold of OP between 7.6–66 μg g$^{−1}$ DW that caused adverse effect on benthic community recolonization. Although the critical adverse OP concentration found in community level was relatively high compared to the environmental concentrations (ppb levels) reported in coastal sediments, it should be pointed out that certain species could be influenced by the exposure of lower OP concentrations.
Starting Page	132
Ending Page	140
Page Count	9
File Format	PDF
ISSN	20059752
Journal	Toxicology and Environmental Health Sciences
Volume Number	2
Issue Number	2
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Macrozoobenthos Recolonization Defaunated sediment Microcosm Octylphenol Pharmacology/Toxicology Environmental Health
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Toxicology

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