Mercury in the northeastern Chukchi Sea: Distribution patterns in seawater and sediments and biomagnification in the benthic food web

Fox, Austin L.; Hughes, Emily A.; Trocine, Robert P.; Trefry, John H.; Schonberg, Susan V.; McTigue, Nathan D.; Lasorsa, Brenda K.; Konar, Brenda; Cooper, Lee W.

doi:10.1016/j.dsr2.2013.07.012

Cited by 53 publications

(28 citation statements)

References 49 publications

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“…g -1 revealed 84% loss, indicating a poor transfer of Hg in the zooplankton. This agreed with earlier studies [25,[33][34].…”

Section: Hg In Zooplankton (Level Ii)supporting

confidence: 83%

“…g -1 ) concentrations as well, plus bioaccumulation studies (30 d) using the DMA-80 [31][32][33][34]. Quality control was assured following the use of blanks, controls, and standard reference materials from BCR, IAEA, NIST, and NRC (CRM-414 phytoplankton powder), (MA-A-1/ TM copepod), (SRM:1566b oyster tissue), and (CRM: DORM-2 dogfish muscle) [35][36].…”

Section: Hg Analysismentioning

confidence: 99%

See 1 more Smart Citation

Effect of Mercury Transfer from Producer to Consumer in a Marine Environment

Bu-Olayan¹,

Thomas²

2017

Pol. J. Environ. Stud.

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“…g -1 revealed 84% loss, indicating a poor transfer of Hg in the zooplankton. This agreed with earlier studies [25,[33][34].…”

Section: Hg In Zooplankton (Level Ii)supporting

confidence: 83%

Section: Hg Analysismentioning

confidence: 99%

Effect of Mercury Transfer from Producer to Consumer in a Marine Environment

Bu-Olayan¹,

Thomas²

2017

Pol. J. Environ. Stud.

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“…The study of contaminants, such as methylmercury, has been linked to stable isotope measurements of carbon and nitrogen in order to relate the fate of metal contaminants to food sources and food web structure (Chen et al, 2009, 2014, 2016, Coelho et al, 2013, Fox et al, 2014, Becker et al, 2016). In these cases, contaminant samples as well as their paired stable isotope samples must be minimally handled and processed to avoid contamination.…”

Section: Introductionmentioning

confidence: 99%

Influence of sample preparation on estuarine macrofauna stable isotope signatures in the context of contaminant bioaccumulation studies

Curtis

Buggé

Buckman

et al. 2017

Journal of Experimental Marine Biology and Ecology

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The ratios of stable isotopes of carbon and nitrogen provide important information on food sources of aquatic organisms and trophic structure of aquatic food webs. For many studies, trophic position and food source are linked to bioaccumulation and trophic transfer of contaminants from prey to predators. In these cases, it is useful to use measurements on whole organisms to make direct comparisons of contaminant bioaccumulation and food web attributes. There is a great deal of variation in methods used for stable isotope analysis, particularly in the selection of tissue type and sample preparation prior to stable isotope analysis. While there have been aquatic studies that examined methodological differences, few have focused on estuarine organisms. In this study, the effects of depuration and tissue dissection on the stable isotope enrichment of common estuarine invertebrates and fish were examined. Homogenized tissues of non-depurated whole organisms were compared to dissected muscle tissue or depurated whole organisms. A 24 h depuration did not change the mean δ15N and δ13C values for most species examined. Additionally, as expected, significant differences in carbon and nitrogen signatures were found when muscle tissues were compared to whole organisms. However, differences were small enough that food source as inferred by δ13C or trophic level as inferred from δ15N would not be inaccurately represented (differences of <1.9‰ for δ13C and <1.2‰ for δ15N). The results of this study suggest that for these common estuarine fish and macroinvertebrates, stable isotopes ratios of samples can be analyzed without depuration in the same way as samples for contaminant analysis, but differences in tissue types must be taken into account when combining data from different sources.

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“…For example, atmospheric sources of Hg to the Bering Sea are largely derived from Asia (AMAP, 2011). Significant inputs of Hg to the ocean and sediments (and subsequently the food web) in the Bering Sea include terrestrially derived Hg from the Yukon River (Day et al, 2012) as well as Hg arriving from the North Pacific to the Bering (Fox et al, 2014). The southern latitude of the Bering has high photo reduction of MeHg that is modulated by sea ice cover (Point et al, 2011).…”

Section: Distant Drivers: Climate Variablesmentioning

confidence: 98%

“…Spatial variation in Hg concentrations across the Beaufort and Chukchi Seas were measured in zooplankton and Arctic cod (Stern and Macdonald, 2005). At a regional level in the Chukchi Sea, Hg concentrations in benthic food webs were related to chlorophyll biomass that influenced dilution (Fox et al, 2014). Thus, the decline in dietary exposure of Hg may have resulted from either a change in dietary items perhaps driven by a shift in feeding/foraging behavior over their migratory range (e.g., see Stern et al, 2012) or may have resulted from an overall reduction of Hg concentration in preferred diet items.…”

Section: Muscle Mercurymentioning

confidence: 99%