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Hydrological and biogeochemical cont...

Young, Maggie Elaine.

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Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland./
Author:	Young, Maggie Elaine.
Description:	118 p.
Notes:	Adviser: Brian Branfireun.
Contained By:	Masters Abstracts International40-03.
Subject:	Biogeochemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ63056
ISBN:	0612630560

Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland.
Young, Maggie Elaine.

Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland. - 118 p.

Adviser: Brian Branfireun.

Thesis (M.Sc.)--University of Toronto (Canada), 2001.

This study assessed linkages between wetland hydrology, total mercury (HgT) and methylmercury (MeHg) fate and transport in Beverly Swamp, a forested swamp in southern Ontario, Canada. The hydrologically distinct wetland reaches exhibited differences in wetland-stream connectivity. Confined reaches showed little interaction with the wetland during low water levels, but there was hydrological and biogeochemical evidence of increased interaction at high flow. The unconfined reach showed disconnected, effluent flow during periods of high flow, and an influent regime during low flow. HgT flux in both reaches was highest during connected flow. Increased flux of McHg in the confined reaches was found during high flow, high water table connected periods due to decreasing redox and soil flushing. The unconfined reach showed no relationship between McHg and discharge due to periods of flow cessation and localized McHg production in-stream. Overall, the wetland is a sink for HgT and a source for McHg.

ISBN: 0612630560Subjects--Topical Terms:

545717
Biogeochemistry.

Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland.
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005 20110505
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020 $a 0612630560
035 $a (UnM)AAIMQ63056
035 $a AAIMQ63056
040 $a UnM $c UnM
100 1 $a Young, Maggie Elaine. $3 1256940
245 1 0 $a Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland.
300 $a 118 p.
500 $a Adviser: Brian Branfireun.
500 $a Source: Masters Abstracts International, Volume: 40-03, page: 0663.
502 $a Thesis (M.Sc.)--University of Toronto (Canada), 2001.
520 $a This study assessed linkages between wetland hydrology, total mercury (HgT) and methylmercury (MeHg) fate and transport in Beverly Swamp, a forested swamp in southern Ontario, Canada. The hydrologically distinct wetland reaches exhibited differences in wetland-stream connectivity. Confined reaches showed little interaction with the wetland during low water levels, but there was hydrological and biogeochemical evidence of increased interaction at high flow. The unconfined reach showed disconnected, effluent flow during periods of high flow, and an influent regime during low flow. HgT flux in both reaches was highest during connected flow. Increased flux of McHg in the confined reaches was found during high flow, high water table connected periods due to decreasing redox and soil flushing. The unconfined reach showed no relationship between McHg and discharge due to periods of flow cessation and localized McHg production in-stream. Overall, the wetland is a sink for HgT and a source for McHg.
590 $a School code: 0779.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Environmental Sciences. $3 676987
650 4 $a Hydrology. $3 545716
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690 $a 0425
690 $a 0768
710 2 0 $a University of Toronto (Canada). $3 1017674
773 0 $t Masters Abstracts International $g 40-03.
790 $a 0779
790 1 0 $a Branfireun, Brian, $e advisor
791 $a M.Sc.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ63056