Increasing Contaminant Burdens in an Arctic Fish, Burbot (Lota lota), in a Warming Climate

Carrie, Jesse; Wang, Fei; Sanei, Hamed; Macdonald, Robie W.; Outridge, P.M.; Stern, Gary A.

doi:10.1021/es902582y

Cited by 136 publications

(155 citation statements)

References 35 publications

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…In studies of four lakes in the Canadian Arctic Archipelago and the Yukon, sediment fluxes of THg increased during the 20th century and were correlated with an increase in aquatic productivity inferred by diatom abundances and chemical characterisation of the sedimented organic matter. [62,65,66] Similarly, the amount of organic matter is an important factor explaining the spatial distribution of Hg in sediments within and among Arctic lakes. Organic matter, which strongly binds Hg, [67] occurs at low concentrations in nearshore and deep-water sediments of High Arctic lakes (typically less than 10 % dry weight (DW), total organic carbon).…”

Section: Since 1993 Prof Henrik Skov Has Worked As Principal Scientimentioning

confidence: 99%

“…[131] The implication that fresh algal organic matter provides an important Hg complexation mechanism in Arctic freshwater is further supported by the strong association between historical fluxes and concentrations of Hg and algal organic carbon in sediment cores from several Arctic lakes. [62,65,66] Transfer pathways for mercury into Arctic food webs In temperate environments, inorganic Hg is methylated predominantly by microbes. From a combination of laboratory and field studies it is believed that there are two main inorganic Hg uptake pathways by microbes that lead to Hg methylation.…”

Section: Bioavailability Of Mercurymentioning

confidence: 99%

See 1 more Smart Citation

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

Douglas

Loseto²,

Macdonald³

et al. 2012

Environ. Chem.

123

147

View full text Add to dashboard Cite

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.

show abstract

Section: Since 1993 Prof Henrik Skov Has Worked As Principal Scientimentioning

confidence: 99%

Section: Bioavailability Of Mercurymentioning

confidence: 99%

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

Douglas

Loseto²,

Macdonald³

et al. 2012

Environ. Chem.

123

147

View full text Add to dashboard Cite

show abstract

“…Several studies have shown that climate warming plays a significant role in algal productivity by using the S2 proxy in the Arctic lakes during recent decades (Outridge et al, 2005(Outridge et al, , 2007Stern et al, 2009;Carrie et al, 2010). However, Kirk et al (2011) investigated 14 Canadian Arctic and subArctic lakes and found that the relationship between the S2 proxy and climate warming was irrelevant.…”

Section: Introductionmentioning

confidence: 99%

Source, composition, and environmental implication of neutral carbohydrates in sediment cores of subtropical reservoirs, South China

et al. 2017

View full text Add to dashboard Cite

Abstract. Neutral monosaccharides, algal organic matter (AOM), and carbon stable isotope ratios in three sediment cores of various trophic reservoirs in South China were determined by high-performance anion-exchange chromatography, Rock-Eval pyrolysis, and Finnigan Delta Plus XL mass spectrometry, respectively. The carbon isotopic compositions were corrected for the Suess effect. The concentrations of total neutral carbohydrates (TCHO) range from 0.51 to 6.4 mg g −1 at mesotrophic reservoirs, and from 0.83 to 2.56 mg g −1 at an oligotrophic reservoir. Monosaccharide compositions and diagnostic parameters indicate a predominant contribution of phytoplankton in each of the three cores, which is consistent with the results inferred from the corrected carbon isotopic data and C/N ratios. The sedimentary neutral carbohydrates are likely to be structural polysaccharides and/or preserved in sediment minerals, which are resistant to degradation in the sediments. Moreover, the monosaccharide contents are highly related to the carbon isotopic data, algal productivity estimated from the hydrogen index, and increasing mean air temperature during the past 60 years. The nutrient input, however, is not a key factor affecting the primary productivity in the three reservoirs. The above evidence demonstrates that some of the resistant monosaccharides have been significantly elevated by climate change, even in low-latitude regions.

show abstract

“…Algal organic matter (AOM) as a biological pump effect in Arctic and sub-Arctic lakes may significantly affect the concentrations of mercury in sediments during the past decades (Sanei and Goodarzi, 2006;Outridge et al, 2007;Carrie et al, 2009;Stern et al, 2009). …”

Section: Introductionmentioning

confidence: 99%