Mercury fluxes in a natural forested Amazonian catchment (Serra do Navio, AmapÃ¡ State, Brazil)

Fostier, Anne Hélène; Forti, M. C.; Guimarães, Jean Rémy Davée; Melfi, Adolpho José; Boulet, René; Santo, Clovis M. E.; Krug, Francisco José

doi:10.1016/s0048-9697(00)00564-7

Cited by 110 publications

(99 citation statements)

References 30 publications

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“…The resulting mercury pollution of the aquatic environment is taken up by the halieutic resources (Farella et al, 2001;Roulet et al, 2001). These important pathways of exposure, later confirmed for other watersheds of the Amazonian Basin (Fostier et al, 2000;Lechler et al, 2000;Fadini and Jardim, 2001;Wasserman et al, 2003;Lacerda et al, 2004;Almeida et al, 2005;Bastos et al, 2006;Farella et al, 2006Farella et al, , 2007Mainville et al, 2006), constitute a continuous source of mercury exposure for the large number of traditional and immigrant communities of the region that rely on fish consumption as a dietary mainstay.…”

Section: Introductionmentioning

confidence: 78%

Daily mercury intake in fish-eating populations in the Brazilian Amazon

Passos

Silva

Lemire

et al. 2007

J Expo Sci Environ Epidemiol

110

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Although high levels of fish consumption and bioindicators of mercury exposure have been reported for traditional populations in the Amazon, little is known about their actual daily intake of Hg. Using an ecosystem approach, calculate daily mercury intake in adult fish-eaters, examine the relations between mercury intake and bioindicators of exposure and the factors that influence these relations. A cross-sectional dietary survey on fish and fruit consumption frequency was carried out with 256 persons from six villages of the Tapajo´s River. Fish portion per meal was determined. Mercury concentration was determined for 1123 local fish specimens. Daily mercury intake (mg/kg/day) was determined for men and women from each village using the average fish-mercury concentration for the fish caught in their fishing zone, the average quantity of fish per meal, fish-species frequency consumption and participants' body weight. Fish-mercury averaged 0.33 mg/g70.33. Daily mercury intake varied between 0 and 11.8 mg/kg/day (mean 0.92 mg/kg/day70.89) and varied by gender and village. Mean blood-and hair-mercury were 58.7736.1 mg/l and 17.9711.5 mg/g, respectively. There was a strong and positive relation between blood-mercury and daily mercury intake, with an inverse relation for fruit intake and schooling; significant variations were observed with immigrant status, and among villages. Hair-mercury was directly associated with daily mercury intake and inversely related to schooling and fruit consumption. Fruit consumption modified the relation between daily mercury intake and blood-mercury levels: for the same daily mercury intake, persons eating more fruit had lower blood-mercury concentrations (ANCOVA Interaction term: F ¼ 10.9, Po0.0001). The median difference of the ratio of blood-mercury to daily mercury intake between low and high fruit consumers was 26, representing a 26.3% reduction. These findings reveal high levels of daily mercury intake. Rigorous studies for developing risk-based reference doses in the Amazon should be undertaken to orient viable risk-management strategies to reduce exposure, while maintaining fish diet.

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Section: Introductionmentioning

confidence: 78%

Daily mercury intake in fish-eating populations in the Brazilian Amazon

Passos

Silva

Lemire

et al. 2007

J Expo Sci Environ Epidemiol

110

View full text Add to dashboard Cite

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“…The timing offset between decreases in GEM and fetch-component radon in the early wet and late dry seasons suggests that air mass origin is not the only influence on wet-season GEM decreases. Within tropical regions, wet deposition has been shown to be a significant pathway for mercury from the atmosphere to both oceanic and terrestrial ecosystems, even in relatively low-mercury air and despite the low solubility of mercury in its elemental form (Fostier et al, 2000;Costa et al, 2012;Hansen and Gay, 2013;Soerensen et al, 2014;Shanley et al, 2015). Mercury "rainout" -or the tendency for mercury rainwater loading to decrease with increasing precipitation -has also been demonstrated in Mercury Deposition Network (MDN) data in North America (Glass and Sorensen, 1999;Prestbo and Gay, 2009) and positive correlations between GEM (TGM) and rainwater mercury have been reported in MDN data (GEM; Cole et al, 2014) and at Cape Point, South Africa (TGM; Brunke et al, 2016).…”

Section: Overall Means and Seasonal Trendsmentioning

confidence: 99%

Atmospheric mercury in the Southern Hemisphere tropics: seasonal and diurnal variations and influence of inter-hemispheric transport

et al. 2017

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Abstract. Mercury is a toxic element of serious concern for human and environmental health. Understanding its natural cycling in the environment is an important goal towards assessing its impacts and the effectiveness of mitigation strategies. Due to the unique chemical and physical properties of mercury, the atmosphere is the dominant transport pathway for this heavy metal, with the consequence that regions far removed from sources can be impacted. However, there exists a dearth of long-term monitoring of atmospheric mercury, particularly in the tropics and Southern Hemisphere. This paper presents the first 2 years of gaseous elemental mercury (GEM) measurements taken at the Australian Tropical Atmospheric Research Station (ATARS) in northern Australia, as part of the Global Mercury Observation System (GMOS). Annual mean GEM concentrations determined at ATARS (0.95 ± 0.12 ng m −3 ) are consistent with recent observations at other sites in the Southern Hemisphere. Comparison with GEM data from other Australian monitoring sites suggests a concentration gradient that decreases with increasing latitude. Seasonal analysis shows that GEM concentrations at ATARS are significantly lower in the distinct wet monsoon season than in the dry season. This result provides insight into alterations of natural mercury cycling processes as a result of changes in atmospheric humidity, oceanic/terrestrial fetch, and convective mixing, and invites future investigation using wet mercury deposition measurements. Due to its location relative to the atmospheric equator, ATARS intermittently samples air originating from the Northern Hemisphere, allowing an opportunity to gain greater understanding of inter-hemispheric transport of mercury and other atmospheric species. Diurnal cycles of GEM at ATARS show distinct nocturnal depletion events that are attributed to dry deposition under stable boundary layer conditions. These cycles provide strong further evidence supportive of a "multihop" model of GEM cycling, characterised by multiple surface depositions and re-emissions, in addition to long-range transport through the atmosphere.

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“…Scatterplot of (a) Hg concentrations in litterfall and litterfall fluxes of Hg, and (b) litterfall biomasses and litterfall fluxes of Hg for the global observations. Data are from this study and the literature (Iverfeldt, 1991;Rea et al, 1996;Roulet et al, 1998;Fostier et al, 2000;Grigal et al, 2000;Schwesig and Matzner, 2000;St. Louis et al, 2001;Mélières et al, 2003;Magarelli and Fostier, 2005;Sheehan et al, 2006;Silva-Filho et al, 2006;Demers et al, 2007;Wangberg et al, 2007;Bushey et al, 2008;Larssen et al, 2008;Wang et al, 2009;Fu et al, 2010b;Fisher and Wolfe, 2012;Juillerat et al, 2012;Teixeira et al, 2012;Benoit et al, 2013;Ma et al, 2016). 2008; Fisher and Wolfe, 2012;Juillerat et al, 2012;, which is the dominant factor causing the difference in litterfall Hg fluxes between China and North America/Europe.…”

Section: Comparison With Observations In Other Regions Worldwidementioning

confidence: 99%

Atmospheric wet and litterfall mercury deposition at urban and rural sites in China

Yang

Lang

et al. 2016

Atmos. Chem. Phys.

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Abstract. Mercury (Hg) concentrations and deposition fluxes in precipitation and litterfall were measured at multiple sites (six rural sites and an urban site) across a broad geographic area in China. The annual deposition fluxes of Hg in precipitation at rural sites and an urban site were 2.0 to 7.2 and 12.6 ± 6.5 µg m −2 yr −1 , respectively. Wet deposition fluxes of Hg at rural sites showed a clear regional difference with elevated deposition fluxes in the subtropical zone, followed by the temporal zone and arid/semi-arid zone. Precipitation depth is the primary influencing factor causing the variation of wet deposition. Hg fluxes through litterfall ranged from 22.8 to 62.8 µg m −2 yr −1 , higher than the wet deposition fluxes by a factor of 3.9 to 8.7 and representing approximately 75 % of the total Hg deposition at the forest sites in China. This suggests that uptake of atmospheric Hg by foliage is the dominant pathway to remove atmospheric Hg in forest ecosystems in China. Wet deposition fluxes of Hg at rural sites of China were generally lower compared to those in North America and Europe, possibly due to a combination of lower precipitation depth, lower GOM concentrations in the troposphere and the generally lower cloud base heights at most sites that wash out a smaller amount of GOM and PBM during precipitation events.

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Mercury fluxes in a natural forested Amazonian catchment (Serra do Navio, AmapÃ¡ State, Brazil)

Cited by 110 publications

References 30 publications

Daily mercury intake in fish-eating populations in the Brazilian Amazon

Daily mercury intake in fish-eating populations in the Brazilian Amazon

Atmospheric mercury in the Southern Hemisphere tropics: seasonal and diurnal variations and influence of inter-hemispheric transport

Atmospheric wet and litterfall mercury deposition at urban and rural sites in China

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