Effect of watershed parameters on mercury distribution in different environmental compartments in the Mobile Alabama River Basin, USA

Warner, Kimberly A.; Bonzongo, Jean-Claude J.; Roden, Eric E.; Ward, George; Green, Adrian C.; Chaubey, Indrajeet; Lyons, W. Berry; Arrington, D. Albrey

doi:10.1016/j.scitotenv.2004.12.011

Cited by 62 publications

(52 citation statements)

References 64 publications

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“…Agriculture (26 %), urban (3 %), wetlands, streams, and reservoirs (11 %) comprise the remaining LULC. Further details on the MARB can be found in our earlier publications (Bonzongo and Lyons 2004;Warner et al 2005).…”

Section: Study Sitementioning

confidence: 99%

“…2b. Information on geographical locations of studied sites (e.g., latitude and longitude) has been published elsewhere (Warner et al 2005).…”

Section: Sampling Site Selection Spatial Analysis and Lulc Identificmentioning

confidence: 99%

“…Triplicate surface sediment samples were collected from each site and analyzed following metal-free ultraclean techniques and Hg detection by CV-AFS. Details on used sampling and analytical techniques can be found in several of our previous publications (e.g., Warner et al 2003;Donkor et al 2005Donkor et al , 2006Warner et al 2005). Briefly, sediment samples were collected from a small workboat using a Ponar grab sampler.…”

Section: Sample Collection and Analysismentioning

confidence: 99%

“…While indicators of ecological disturbances are now commonly used to study the impact of rapid land-use transformations on different environmental compartments (Li et al 2010;Carey et al 2011;Oliver et al 2011), research which addresses the response of mercury (Hg) accumulated in aquatic sediments in response to land changes and at a watershed scale is still lacking. Despite some preliminary studies on a watershed scale (Bonzongo and Lyons 2004;Balogh et al 2005;Warner et al 2005), the following pertinent questions on the long-term fate of Hg already present in soils/ sediments remain unanswered. First, how can the dominant factors controlling the methylation of inorganic Hg already present in soil/sediment be identified and their effects quantified on a watershed scale?…”

Section: Introductionmentioning

confidence: 99%

“…This is illustrated by the rather limited number of papers dealing specifically with the impacts of land use on Hg cycling in aquatic systems (Balogh et al 1998(Balogh et al , 2005Lacerda et al 2004;Almeida et al 2005;Roue-LeGall et al 2005;Warner et al 2005) Fig. 1 Natural and anthropogenic forcings driving the physicochemical and biological processes that define the cycle of Hg in aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

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Linking landscape development intensity within watersheds to methyl-mercury accumulation in river sediments

Donkor

Attibayeba

Gao

2015

Ambio

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An indicator of the disturbance of natural systems, the landscape development intensity (LDI) index, was used to assess the potential for land-use within watersheds to influence the production/ accumulation of methyl-mercury (MeHg) in river sediments. Sediment samples were collected from locations impacted by well-identified land-use types within the Mobile-Alabama River Basin in Southeastern USA. The samples were analyzed for total-Hg (THg) and MeHg concentrations and the obtained values correlated to the calculated LDI indexes of the sampled watersheds to assess the impact of prevalent land use/land cover on MeHg accumulation in sediments. The results show that unlike THg, levels of MeHg found in sediments are impacted by the LDI indexes. Overall, certain combinations of land-use types within a given watershed appear to be more conducive to MeHg accumulation than others, therefore, pointing to the possibility of targeting land-use practices as potential means for reducing MeHg accumulation in sediments, and ultimately, fish contamination.

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Section: Study Sitementioning

confidence: 99%

“…2b. Information on geographical locations of studied sites (e.g., latitude and longitude) has been published elsewhere (Warner et al 2005).…”

Section: Sampling Site Selection Spatial Analysis and Lulc Identificmentioning

confidence: 99%

Section: Sample Collection and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Linking landscape development intensity within watersheds to methyl-mercury accumulation in river sediments

Donkor

Attibayeba

Gao

2015

Ambio

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Deposition of mercury in forests across a montane elevation gradient: Elevational and seasonal patterns in methylmercury inputs and production

et al. 2017

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Global mercury contamination largely results from direct primary atmospheric and secondary legacy emissions, which can be deposited to ecosystems, converted to methylmercury, and bioaccumulated along food chains. We examined organic horizon soil samples collected across an elevational gradient on Whiteface Mountain in the Adirondack region of New York State, USA to determine spatial patterns in methylmercury concentrations across a forested montane landscape. We found that soil methylmercury concentrations were highest in the midelevation coniferous zone (0.39 ± 0.07 ng/g) compared to the higher elevation alpine zone (0.28 ± 0.04 ng/g) and particularly the lower elevation deciduous zone (0.17 ± 0.02 ng/g), while the percent of total mercury as methylmercury in soils decreased with elevation. We also found a seasonal pattern in soil methylmercury concentrations, with peak methylmercury values occurring in July. Given elevational patterns in temperature and bioavailable total mercury (derived from mineralization of soil organic matter), soil methylmercury concentrations appear to be driven by soil processing of ionic Hg, as opposed to atmospheric deposition of methylmercury. These methylmercury results are consistent with spatial patterns of mercury concentrations in songbird species observed from other studies, suggesting that future declines in mercury emissions could be important for reducing exposure of mercury to montane avian species.

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Microbial Transformations in the Mercury Cycle

Lin

Yee

Barkay

2011

Environmental Chemistry and Toxicology of Mercury

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Effect of watershed parameters on mercury distribution in different environmental compartments in the Mobile Alabama River Basin, USA

Cited by 62 publications

References 64 publications

Linking landscape development intensity within watersheds to methyl-mercury accumulation in river sediments

Linking landscape development intensity within watersheds to methyl-mercury accumulation in river sediments

Deposition of mercury in forests across a montane elevation gradient: Elevational and seasonal patterns in methylmercury inputs and production

Microbial Transformations in the Mercury Cycle

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