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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.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Hydrological and biogeochemical controls on mercury fate and transport in a southern Ontario forested wetland./
作者:	Young, Maggie Elaine.
面頁冊數:	118 p.
附註:	Adviser: Brian Branfireun.
Contained By:	Masters Abstracts International40-03.
標題:	Biogeochemistry. -
電子資源:	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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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.
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