2001
DOI: 10.1021/es001924p
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Importance of the Forest Canopy to Fluxes of Methyl Mercury and Total Mercury to Boreal Ecosystems

Abstract: The forest canopy was an important contributor to fluxes of methyl mercury (MeHg) and total mercury (THg) to the forest floor of boreal uplands and wetlands and potentially to downstream lakes, at the Experimental Lakes Area (ELA), northwestern Ontario. The estimated fluxes of MeHg and THg in throughfall plus litterfall below the forest canopy were 2 and 3 times greater than annual fluxes by direct wet deposition of MeHg (0.9 mg of MeHg ha(-1)) and THg (71 mg of THg ha(-1)). Almost all of the increased flux of… Show more

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Cited by 267 publications
(166 citation statements)
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“…Litterfall samples were collected using litterfall collectors (0.25 m 2 at MLG and 1.0 m 2 at MCB, MDM, and MAL) at the sampling sites (St. Louis et al, 2001;Fisher and Wolfe, 2012;. The collectors were constructed using an untreated wood frame and a Nylon net bottom with a pore size of 1.0 mm × 1.0 mm.…”
Section: Collection and Analysis Of Litterfall Samplesmentioning
confidence: 99%
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“…Litterfall samples were collected using litterfall collectors (0.25 m 2 at MLG and 1.0 m 2 at MCB, MDM, and MAL) at the sampling sites (St. Louis et al, 2001;Fisher and Wolfe, 2012;. The collectors were constructed using an untreated wood frame and a Nylon net bottom with a pore size of 1.0 mm × 1.0 mm.…”
Section: Collection and Analysis Of Litterfall Samplesmentioning
confidence: 99%
“…Given the measured atmospheric PBM and GOM concentrations (Fu et al, 2015b;Yu et al, 2015), the dry deposition fluxes of PBM and GOM at the MCB, MDM, and MAL sites were estimated to be 3.0, 9.6, and 2.3 µg m −2 yr −1 , respectively, using the average dry deposition velocities of PBM and GOM over forests modeled by L. . At the MLG site, annual dry deposition flux of PBM and GOM was estimated to be 4.4 µg m −2 yr −1 using the comparison of precipitation and throughfall data collected side by side (St. Louis et al, 2001;Fu et al, 2010a;. The importance of litterfall in the total deposition of Hg has been highlighted by many previous studies (St. Louis et al, 2001;Lindberg et al, 2007;.…”
Section: Relative Contribution Of Wet and Litterfall Deposition To Tomentioning
confidence: 99%
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“…the dominant tree species (De Vries and Bakker, 1998;Driscoll et al, 1994;Gandois et al, 2010;Lindberg et al, 2007;Perez-Suarez et al, 2008;St Louis et al, 2001). Therefore, we increased depositions values from literature by a factor of 2 (deciduous forests) and 2.5 (conifer forest) for Cd and Hg, and 2 (deciduous forests) and 3 (conifer forest)…”
Section: Input Datamentioning
confidence: 97%
“…Historical HM inputs were assessed by peat and ice core studies conducted in Switzerland Ross-Barraclough and Shotyk, 2003;Shotyk et al, 2002;Weiss et al, 1999). In addition, the tree species also influences the HM inputs (Perez-Suarez et al, 2008;St Louis et al, 2001) which has been taken into account in our estimations with different corrections factors for conifer and deciduous forests. Uncertainties are also related to the sampling of the soil matrix and the soil solution at the same spot.…”
Section: Uncertainties Of Input Data and Modelmentioning
confidence: 99%