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Forestry Influence by Stump Harvest and Site Preparation on Methylmercury, Total Mercury and Other Stream Water Chemistry Parameters Across a Boreal Landscape

Forestry has been reported to cause elevated mercury (Hg) concentrations in runoff water. However, the degree to which forestry operations influence Hg in runoff varies among sites. A synoptic study, covering 54 catchments distributed all over Sweden, subjected to either stump harvest (SH), site pre... Full description

Journal Title: Ecosystems (New York) 2012-12-01, Vol.15 (8), p.1308-1320
Main Author: Eklöf, Karin
Other Authors: Kraus, Andrea , Weyhenmeyer, Gesa A , Meili, Markus , Bishop, Kevin
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: New York: Springer Science+Business Media
ID: ISSN: 1432-9840
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recordid: cdi_swepub_primary_oai_DiVA_org_uu_189664
title: Forestry Influence by Stump Harvest and Site Preparation on Methylmercury, Total Mercury and Other Stream Water Chemistry Parameters Across a Boreal Landscape
format: Article
creator:
  • Eklöf, Karin
  • Kraus, Andrea
  • Weyhenmeyer, Gesa A
  • Meili, Markus
  • Bishop, Kevin
subjects:
  • Article
  • Biological Sciences
  • Biologiska vetenskaper
  • Biomedical and Life Sciences
  • Boreal forests
  • catchments
  • Creeks & streams
  • Earth and Related Environmental Sciences
  • Earth Science with specialization in Environmental Analysis
  • Ecology
  • Environmental impact
  • Environmental Management
  • Environmental Sciences
  • Forest management
  • Forest Science
  • Forest soils
  • Forestry
  • Forests
  • Geoecology/Natural Processes
  • Geovetenskap med inriktning mot miljöanalys
  • Geovetenskap och miljövetenskap
  • Hydrology/Water Resources
  • Life Sciences
  • Mercury
  • methylation
  • Miljövetenskap
  • Natural Sciences
  • Naturvetenskap
  • organic matter
  • Plant Sciences
  • Skogsvetenskap
  • Soil pollution
  • Soil water
  • spatial variation
  • Streams
  • stump
  • Surface water
  • Timber industry
  • Water pollution
  • Watersheds
  • Zoology
ispartof: Ecosystems (New York), 2012-12-01, Vol.15 (8), p.1308-1320
description: Forestry has been reported to cause elevated mercury (Hg) concentrations in runoff water. However, the degree to which forestry operations influence Hg in runoff varies among sites. A synoptic study, covering 54 catchments distributed all over Sweden, subjected to either stump harvest (SH), site preparation (SP) or no treatment (Ref), was undertaken to reveal the degree of forestry impact and causes of eventual variation. All streams were sampled twice, in autumn 2009 and summer 2010. There were no significant differences in total mercury (THg) and methylmercury (MeHg) concentrations between the three treatments in either 2009 or 2010. However, when pooling the treated catchments (that is, SH and SP) and taking catchment properties such as latitude into account, the treatment had a significant influence on the THg and MeHg concentrations. Although the treatment effect on THg and MeHg did not differ between SH and SP, the study did reveal significant forestry effects on potassium (K) and total nitrogen (TN) that were greater in the SH catchments and lower in the SP catchments. Partial least square (PLS) regressions indicated that organic matter was the most important variable influencing both the THg and MeHg concentrations. There were no significant differences between the treatment groups when comparing the ratios of THg/total organic carbon (TOC) and MeHg/TOC, suggesting that the high concentrations of THg and MeHg observed at some of the treated catchments are associated with increased concentrations of TOC rather than new methylation or increased mobilization caused by factors other than TOC.
language: eng
source:
identifier: ISSN: 1432-9840
fulltext: no_fulltext
issn:
  • 1432-9840
  • 1435-0629
  • 1435-0629
url: Link


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titleForestry Influence by Stump Harvest and Site Preparation on Methylmercury, Total Mercury and Other Stream Water Chemistry Parameters Across a Boreal Landscape
creatorEklöf, Karin ; Kraus, Andrea ; Weyhenmeyer, Gesa A ; Meili, Markus ; Bishop, Kevin
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descriptionForestry has been reported to cause elevated mercury (Hg) concentrations in runoff water. However, the degree to which forestry operations influence Hg in runoff varies among sites. A synoptic study, covering 54 catchments distributed all over Sweden, subjected to either stump harvest (SH), site preparation (SP) or no treatment (Ref), was undertaken to reveal the degree of forestry impact and causes of eventual variation. All streams were sampled twice, in autumn 2009 and summer 2010. There were no significant differences in total mercury (THg) and methylmercury (MeHg) concentrations between the three treatments in either 2009 or 2010. However, when pooling the treated catchments (that is, SH and SP) and taking catchment properties such as latitude into account, the treatment had a significant influence on the THg and MeHg concentrations. Although the treatment effect on THg and MeHg did not differ between SH and SP, the study did reveal significant forestry effects on potassium (K) and total nitrogen (TN) that were greater in the SH catchments and lower in the SP catchments. Partial least square (PLS) regressions indicated that organic matter was the most important variable influencing both the THg and MeHg concentrations. There were no significant differences between the treatment groups when comparing the ratios of THg/total organic carbon (TOC) and MeHg/TOC, suggesting that the high concentrations of THg and MeHg observed at some of the treated catchments are associated with increased concentrations of TOC rather than new methylation or increased mobilization caused by factors other than TOC.
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subjectArticle ; Biological Sciences ; Biologiska vetenskaper ; Biomedical and Life Sciences ; Boreal forests ; catchments ; Creeks & streams ; Earth and Related Environmental Sciences ; Earth Science with specialization in Environmental Analysis ; Ecology ; Environmental impact ; Environmental Management ; Environmental Sciences ; Forest management ; Forest Science ; Forest soils ; Forestry ; Forests ; Geoecology/Natural Processes ; Geovetenskap med inriktning mot miljöanalys ; Geovetenskap och miljövetenskap ; Hydrology/Water Resources ; Life Sciences ; Mercury ; methylation ; Miljövetenskap ; Natural Sciences ; Naturvetenskap ; organic matter ; Plant Sciences ; Skogsvetenskap ; Soil pollution ; Soil water ; spatial variation ; Streams ; stump ; Surface water ; Timber industry ; Water pollution ; Watersheds ; Zoology
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descriptionForestry has been reported to cause elevated mercury (Hg) concentrations in runoff water. However, the degree to which forestry operations influence Hg in runoff varies among sites. A synoptic study, covering 54 catchments distributed all over Sweden, subjected to either stump harvest (SH), site preparation (SP) or no treatment (Ref), was undertaken to reveal the degree of forestry impact and causes of eventual variation. All streams were sampled twice, in autumn 2009 and summer 2010. There were no significant differences in total mercury (THg) and methylmercury (MeHg) concentrations between the three treatments in either 2009 or 2010. However, when pooling the treated catchments (that is, SH and SP) and taking catchment properties such as latitude into account, the treatment had a significant influence on the THg and MeHg concentrations. Although the treatment effect on THg and MeHg did not differ between SH and SP, the study did reveal significant forestry effects on potassium (K) and total nitrogen (TN) that were greater in the SH catchments and lower in the SP catchments. Partial least square (PLS) regressions indicated that organic matter was the most important variable influencing both the THg and MeHg concentrations. There were no significant differences between the treatment groups when comparing the ratios of THg/total organic carbon (TOC) and MeHg/TOC, suggesting that the high concentrations of THg and MeHg observed at some of the treated catchments are associated with increased concentrations of TOC rather than new methylation or increased mobilization caused by factors other than TOC.
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abstractForestry has been reported to cause elevated mercury (Hg) concentrations in runoff water. However, the degree to which forestry operations influence Hg in runoff varies among sites. A synoptic study, covering 54 catchments distributed all over Sweden, subjected to either stump harvest (SH), site preparation (SP) or no treatment (Ref), was undertaken to reveal the degree of forestry impact and causes of eventual variation. All streams were sampled twice, in autumn 2009 and summer 2010. There were no significant differences in total mercury (THg) and methylmercury (MeHg) concentrations between the three treatments in either 2009 or 2010. However, when pooling the treated catchments (that is, SH and SP) and taking catchment properties such as latitude into account, the treatment had a significant influence on the THg and MeHg concentrations. Although the treatment effect on THg and MeHg did not differ between SH and SP, the study did reveal significant forestry effects on potassium (K) and total nitrogen (TN) that were greater in the SH catchments and lower in the SP catchments. Partial least square (PLS) regressions indicated that organic matter was the most important variable influencing both the THg and MeHg concentrations. There were no significant differences between the treatment groups when comparing the ratios of THg/total organic carbon (TOC) and MeHg/TOC, suggesting that the high concentrations of THg and MeHg observed at some of the treated catchments are associated with increased concentrations of TOC rather than new methylation or increased mobilization caused by factors other than TOC.
copNew York
pubSpringer Science+Business Media
doi10.1007/s10021-012-9586-3