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Geochemical and Dietary Drivers of Mercury Bioaccumulation in Estuarine Benthic Invertebrates

Jonsson, Sofi and Liem-Nguyen, Van and Andersson, Agneta and Skyllberg, Ulf and Nilsson, Mats and Lundberg, Erik and Bjorn, Erik (2022). Geochemical and Dietary Drivers of Mercury Bioaccumulation in Estuarine Benthic Invertebrates. Environmental Science and Technology. 56 :14 , 10141-10148
[Research article]

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Abstract

ABSTRACT: Sediments represent the main reservoir of mercury (Hg) in aquatic environments and may act as a source of Hg to aquatic food webs. Yet, accumulation routes of Hg from the sediment to benthic organisms are poorly constrained. We studied the bioaccumulation of inorganic and methylmercury (HgII and MeHg, respectively) from different geochemical pools of Hg into four groups of benthic invertebrates (amphipods, polychaetes, chironomids, and bivalves). The study was conducted using mesocosm experiments entailing the use of multiple isotopically enriched Hg tracers and simulation of estuarine systems with brackish water and sediment. We applied different loading regimes of nutrients and terrestrial organic matter and showed that the vertical localization and the chemical speciation of HgII and MeHg in the sediment, in combination with the diet composition of the invertebrates, consistently controlled the bioaccumulation of HgII and MeHg into the benthic organisms. Our results suggest a direct link between the concentration of MeHg in the pelagic planktonic food web and the concentration of MeHg in benthic amphipods and, to some extent, in bivalves. In contrast, the quantity of MeHg in benthic chironomids and polychaetes seems to be driven by MeHg accumulation via the benthic food web. Accounting for these geochemical and dietary drivers of Hg bioaccumulation in benthic invertebrates will be important to understand and predict Hg transfer between the benthic and the pelagic food web, under current and future environmental scenarios.

Authors/Creators:Jonsson, Sofi and Liem-Nguyen, Van and Andersson, Agneta and Skyllberg, Ulf and Nilsson, Mats and Lundberg, Erik and Bjorn, Erik
Title:Geochemical and Dietary Drivers of Mercury Bioaccumulation in Estuarine Benthic Invertebrates
Series Name/Journal:Environmental Science and Technology
Year of publishing :2022
Volume:56
Number:14
Page range:10141-10148
Number of Pages:8
Publisher:AMER CHEMICAL SOC
ISSN:0013-936X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:monomethylmercury, inorganic divalent mercury, benthic food webs, mercury uptake, biomagni fi cation, Baltic Sea
URN:NBN:urn:nbn:se:slu:epsilon-p-118358
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118358
Additional ID:
Type of IDID
DOI10.1021/acs.est.2c03265
Web of Science (WoS)000823459600001
ID Code:28456
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:16 Aug 2022 13:26
Metadata Last Modified:16 Aug 2022 13:31

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