Mercury and other trace elements in a pelagic Arctic marine food web (Northwater Polynya, Baffin Bay)

Campbell, Linda M.; Norstrom, Ross J.; Hobson, Keith A.; Muir, Derek C.G.; Backus, Sean; Fisk, Aaron T.

doi:10.1016/j.scitotenv.2005.02.043

Cited by 442 publications

(300 citation statements)

References 41 publications

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“…2), suggesting trophic transfer and biomagnification of Hg in fish from Lhasa River. Similar results were also observed for Hg in Arctic marine food chain (Atwell et al, 1998;Campbell et al, 2005), sub-Arctic lake (Power et al, 2002) and in Lake Murray, Papua New Guinea (Bowles et al, 2001). Contents of THg and MeHg in fish from Lhasa River decreased on the descending order: Schizothorax waltoni > Schizothorax macropogon and O. stewartii > Schizopygopsis younghusbandi and Schizothorax o'connori (one-way ANOVA analysis, p < 0.05) (Fig.…”

Section: Accumulation Of Hg In Fishsupporting

confidence: 82%

“…Due to its lipophilicity, MeHg can penetrate the blood-brain barrier and finally harm central nervous system (Cheng et al, 2005Clarkson and Magos, 2006;Winship, 1986). MeHg constitutes more than 80% of THg in fish muscle (Akagi et al, 1995;Bloom, 1992;Campbell et al, 2005;Guentzel et al, 2007;Mohan et al, 2012). Consumption of fish with elevated MeHg is the principal pathway of human exposure to Hg (Liang et al, 2013;Tang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Mercury in alpine fish from four rivers in the Tibetan Plateau

Shao

Shi

et al. 2016

Journal of Environmental Sciences

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Section: Accumulation Of Hg In Fishsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Mercury in alpine fish from four rivers in the Tibetan Plateau

Shao

Shi

et al. 2016

Journal of Environmental Sciences

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“…the eastern Canadian Arctic). [145,146] Another possible source of MeHg is the atmospheric photodegradation of volatile DMHg evaded from seawater and lakes. [16,18,19,147,148] Production of DMHg by pure cultures of Antarctic marine bacteria, [149] and by macroalgae isolated from an Arctic fjord, [150] has been demonstrated.…”

Section: Controls On Arctic Food Chain Mercury Accumulation By Methylmentioning

confidence: 99%

“…7b). [144][145][146] A study using d 15 N to infer the trophic positions of species [145] reported log concentration-d 15 [146] as well as in food webs along the west coast of Greenland that had log concentration-d 15 N relationship slopes of 0.18 and 0.34 for THg and MeHg. [167] Regression slopes of these Arctic marine examples were noted to be remarkably similar to others in different systems regardless of productivity, latitude or salinity.…”

Section: Methylmercury Destruction Pathwaysmentioning

confidence: 99%

The fate of mercury in Arctic terrestrial and aquatic ecosystems, a review

Douglas

Loseto²,

Macdonald³

et al. 2012

Environ. Chem.

118

145

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Environmental context. Mercury, in its methylated form, is a neurotoxin that biomagnifies in marine and terrestrial foodwebs leading to elevated levels in fish and fish-eating mammals worldwide, including at numerous Arctic locations. Elevated mercury concentrations in Arctic country foods present a significant exposure risk to Arctic people. We present a detailed review of the fate of mercury in Arctic terrestrial and marine ecosystems, taking into account the extreme seasonality of Arctic ecosystems and the unique processes associated with sea ice and Arctic hydrology.Abstract. This review is the result of a series of multidisciplinary meetings organised by the Arctic Monitoring and Assessment Programme as part of their 2011 Assessment 'Mercury in the Arctic'. This paper presents the state-of-the-art knowledge on the environmental fate of mercury following its entry into the Arctic by oceanic, atmospheric and terrestrial pathways. Our focus is on the movement, transformation and bioaccumulation of Hg in aquatic (marine and fresh water) and terrestrial ecosystems. The processes most relevant to biological Hg uptake and the potential risk associated with Hg exposure in wildlife are emphasised. We present discussions of the chemical transformations of newly deposited or transported Hg in marine, fresh water and terrestrial environments and of the movement of Hg from air, soil and water environmental compartments into food webs. Methylation, a key process controlling the fate of Hg in most ecosystems, and the role of trophic processes in controlling Hg in higher order animals are also included. Case studies on Eastern Beaufort Sea beluga (Delphinapterus leucas) and landlocked Arctic char (Salvelinus alpinus) are presented as examples of the relationship between ecosystem trophic processes and biologic Hg levels. We examine whether atmospheric mercury depletion events (AMDEs) contribute to increased Hg levels in Arctic biota and provide information on the links between organic carbon and Hg speciation, dynamics and bioavailability. Long-term sequestration of Hg into non-biological archives is also addressed. The review concludes by identifying major knowledge gaps in our understanding, including:(1) the rates of Hg entry into marine and terrestrial ecosystems and the rates of inorganic and MeHg uptake by Arctic microbial and algal communities; (2) the bioavailable fraction of AMDE-related Hg and its rate of accumulation by biota and (3) the fresh water and marine MeHg cycle in the Arctic, especially the marine MeHg cycle.

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“…Seabirds are the main source of the terrestrial environment's pollution because their food consists of organisms that are high in the food chain. As a result of bioaccumulation and biomagnification, these organisms contain a high concentration of pollutants, including heavy metals originating from the marine environment (Buckman et al, 2005;Campbell et al, 2005;Mallory and Braune, 2012). Enrichment of the terrestrial environment with heavy metals in the proximity of seabird breeding areas is documented for the polar (Godzik, 1991;Headley, 1996;Bargagli et al, 1998;Sun et al, 2004;Zhu et al, 2005;Evenset et al, 2007;Mallory et al, 2015) and temperate zones, as well as the tropical zone (Otero Perez, 1998;Hawke et al, 1999;Garcia et al, 2002;Liu et al, 2006).…”

Section: Introductionmentioning

confidence: 99%