Chemical-, site-, and taxa-dependent benthic community health in coastal areas of the Bohai Sea and northern Yellow Sea: A sediment quality triad approach

The Science of the Total Environment
Jong Seong KhimJohn P Giesy

Abstract

To investigate benthic ecological quality associated with coastal pollution in the Bohai Sea and northern Yellow Sea, a sediment quality triad (SQT) approach was applied. Chemical (six groups of persistent toxic substances (PTSs) and 8 metals and metalloids), toxicological (AhR-mediated potency), and ecological (bacterial and meiofaunal communities) elements were selected and used in an integrated sediment assessment. The benthic meiofaunal community was newly analyzed and used as an additional component of the infaunal community during the SQT. Concentrations of chemicals and potential toxicity in sediments both indicated moderate to severe pollution in the study area, characterized by site-specific and land-uses. In particular, As, DDTs, and bioassay-derived dioxin equivalents exceeded corresponding sediment quality guidelines at nearly all locations. Limited occurrences of meiofaunal taxa (mean = 5.2) and relatively low species diversity, mainly comprised of nematodes (75.3%) and copepods (14.6%), among locations was generally consistent with pollution. The benthic community was consistent with compound-specific responses to gradients of contamination, particularly for As. Densities of two taxa, Nematoda and Nemertea exhibit...Continue Reading

Citations

Sep 17, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Paula C FureySylvia Lee
Oct 22, 2020·The Science of the Total Environment·Hanbyul LeeJae-Jin Kim
Mar 20, 2021·The Science of the Total Environment·Marina Ferrel FonsecaGustavo Fonseca
Jun 20, 2021·The Science of the Total Environment·Kyuwon HwangJong Seong Khim

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