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Effects of forest fires and clear-cu...

Pinheiro, Fabiola Maria Rolan.

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Effects of forest fires and clear-cutting on mercury loading to boreal lakes.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Effects of forest fires and clear-cutting on mercury loading to boreal lakes./
Author:	Pinheiro, Fabiola Maria Rolan.
Description:	124 p.
Notes:	Adviser: Alfonso Mucci.
Contained By:	Masters Abstracts International40-04.
Subject:	Agriculture, Forestry and Wildlife. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ64431
ISBN:	0612644316

Effects of forest fires and clear-cutting on mercury loading to boreal lakes.
Pinheiro, Fabiola Maria Rolan.

Effects of forest fires and clear-cutting on mercury loading to boreal lakes. - 124 p.

Adviser: Alfonso Mucci.

Thesis (M.Sc.)--McGill University (Canada), 2000.

In the soil, mercury species are predominantly associated with particulate organic carbon (POC) and can be exported with surface runoff by erosion or in solution, associated with dissolved organic carbon (DOC).

ISBN: 0612644316Subjects--Topical Terms:

783690
Agriculture, Forestry and Wildlife.

Effects of forest fires and clear-cutting on mercury loading to boreal lakes.
LDR:02063nam 2200301 a 45 001 933203
005 20110505
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020 $a 0612644316
035 $a (UnM)AAIMQ64431
035 $a AAIMQ64431
040 $a UnM $c UnM
100 1 $a Pinheiro, Fabiola Maria Rolan. $3 1256942
245 1 0 $a Effects of forest fires and clear-cutting on mercury loading to boreal lakes.
300 $a 124 p.
500 $a Adviser: Alfonso Mucci.
500 $a Source: Masters Abstracts International, Volume: 40-04, page: 0959.
502 $a Thesis (M.Sc.)--McGill University (Canada), 2000.
520 $a In the soil, mercury species are predominantly associated with particulate organic carbon (POC) and can be exported with surface runoff by erosion or in solution, associated with dissolved organic carbon (DOC).
520 $a Water column samples collected in September 1997 and May 1998 from three treatment groups of lakes (9 whose watershed was clear-cut, 9 whose watershed was burnt, and 20 control lakes, whose watershed forests have not been touched by forest fires or clear-cutting for at least 70 years) were analyzed. Results of these analyses reveal a significant increase in the DOC and dissolved methylmercury concentrations in lake water after watershed clear-cutting. Following forest fires, there is an enrichment of methylmercury in the suspended particulate matter (SPM), as well as significant losses of nitrogen species. Thus, watershed perturbations increase the export of mercury species from the catchment to drainage lakes, and this effect is greater in logged- than in burnt-watershed lakes. This mercury export is dependent on the delivery of POC and DOC to the lakes, which increases as a result of surface runoff intensification. (Abstract shortened by UMI.)
590 $a School code: 0781.
650 4 $a Agriculture, Forestry and Wildlife. $3 783690
650 4 $a Environmental Sciences. $3 676987
650 4 $a Geochemistry. $3 539092
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690 $a 0768
690 $a 0996
710 2 0 $a McGill University (Canada). $3 1018122
773 0 $t Masters Abstracts International $g 40-04.
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790 1 0 $a Mucci, Alfonso, $e advisor
791 $a M.Sc.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ64431