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Artificial drainage and associated carbon fluxes (CO2/CH4) in a tundra ecosystem.

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Title: Artificial drainage and associated carbon fluxes (CO2/CH4) in a tundra ecosystem.
Authors: MERBOLD, L.1, KUTSCH, W. L.1, CORRADI, C.2, KOLLE, O.1, REBMANN, C.1, STOY, P. C.3, ZIMOV, S. A.4, SCHULZE, E.-D.1
Source: Global Change Biology. Nov2009, Vol. 15 Issue 11, p2599-2614. 16p. 2 Diagrams, 3 Charts, 7 Graphs.
Subjects: Analysis of covariance, Ecosystem management, Watershed ecology, Tundra ecology, Plant canopies, Evapotranspiration, Plant water requirements, Plant transpiration, Soil moisture conservation
Abstract: Ecosystem flux measurements using the eddy covariance (EC) technique were undertaken in 4 subsequent years during summer for a total of 562 days in an arctic wet tundra ecosystem, located near Cherskii, Far-Eastern Federal District, Russia. Methane (CH4) emissions were measured using permanent chambers. The experimental field is characterized by late thawing of permafrost soils in June and periodic spring floods. A stagnant water table below the grass canopy is fed by melting of the active layer of permafrost and by flood water. Following 3 years of EC measurements, the site was drained by building a 3 m wide drainage channel surrounding the EC tower to examine possible future effects of global change on the tundra tussock ecosystem. Cumulative summertime net carbon fluxes before experimental alteration were estimated to be about +15 g C m−2 (i.e. an ecosystem C loss) and +8 g C m−2 after draining the study site. When taking CH4 as another important greenhouse gas into account and considering the global warming potential (GWP) of CH4 vs. CO2, the ecosystem had a positive GWP during all summers. However CH4 emissions after drainage decreased significantly and therefore the carbon related greenhouse gas flux was much smaller than beforehand (475 ± 253 g C-CO2-e m−2 before drainage in 2003 vs. 23 ± 26 g C-CO2-e m−2 after drainage in 2005). [ABSTRACT FROM AUTHOR]
Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Artificial drainage and associated carbon fluxes (CO<subscript>2</subscript>/CH<subscript>4</subscript>) in a tundra ecosystem.
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  Data: <searchLink fieldCode="AR" term="%22MERBOLD%2C+L%2E%22">MERBOLD, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22KUTSCH%2C+W%2E+L%2E%22">KUTSCH, W. L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22CORRADI%2C+C%2E%22">CORRADI, C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22KOLLE%2C+O%2E%22">KOLLE, O.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22REBMANN%2C+C%2E%22">REBMANN, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22STOY%2C+P%2E+C%2E%22">STOY, P. C.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22ZIMOV%2C+S%2E+A%2E%22">ZIMOV, S. A.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22SCHULZE%2C+E%2E-D%2E%22">SCHULZE, E.-D.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Global+Change+Biology%22">Global Change Biology</searchLink>. Nov2009, Vol. 15 Issue 11, p2599-2614. 16p. 2 Diagrams, 3 Charts, 7 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Analysis+of+covariance%22">Analysis of covariance</searchLink><br /><searchLink fieldCode="DE" term="%22Ecosystem+management%22">Ecosystem management</searchLink><br /><searchLink fieldCode="DE" term="%22Watershed+ecology%22">Watershed ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Tundra+ecology%22">Tundra ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+canopies%22">Plant canopies</searchLink><br /><searchLink fieldCode="DE" term="%22Evapotranspiration%22">Evapotranspiration</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+water+requirements%22">Plant water requirements</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+transpiration%22">Plant transpiration</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+moisture+conservation%22">Soil moisture conservation</searchLink>
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  Data: Ecosystem flux measurements using the eddy covariance (EC) technique were undertaken in 4 subsequent years during summer for a total of 562 days in an arctic wet tundra ecosystem, located near Cherskii, Far-Eastern Federal District, Russia. Methane (CH4) emissions were measured using permanent chambers. The experimental field is characterized by late thawing of permafrost soils in June and periodic spring floods. A stagnant water table below the grass canopy is fed by melting of the active layer of permafrost and by flood water. Following 3 years of EC measurements, the site was drained by building a 3 m wide drainage channel surrounding the EC tower to examine possible future effects of global change on the tundra tussock ecosystem. Cumulative summertime net carbon fluxes before experimental alteration were estimated to be about +15 g C m−2 (i.e. an ecosystem C loss) and +8 g C m−2 after draining the study site. When taking CH4 as another important greenhouse gas into account and considering the global warming potential (GWP) of CH4 vs. CO2, the ecosystem had a positive GWP during all summers. However CH4 emissions after drainage decreased significantly and therefore the carbon related greenhouse gas flux was much smaller than beforehand (475 ± 253 g C-CO2-e m−2 before drainage in 2003 vs. 23 ± 26 g C-CO2-e m−2 after drainage in 2005). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/j.1365-2486.2009.01962.x
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 2599
    Subjects:
      – SubjectFull: Analysis of covariance
        Type: general
      – SubjectFull: Ecosystem management
        Type: general
      – SubjectFull: Watershed ecology
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      – SubjectFull: Tundra ecology
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      – SubjectFull: Plant canopies
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      – SubjectFull: Evapotranspiration
        Type: general
      – SubjectFull: Plant water requirements
        Type: general
      – SubjectFull: Plant transpiration
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      – SubjectFull: Soil moisture conservation
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      – TitleFull: Artificial drainage and associated carbon fluxes (CO2/CH4) in a tundra ecosystem.
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              Text: Nov2009
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