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    Fates of Eroded Soil Organic Carbon: Mississippi Basin Case Study

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    Issue Date
    2005
    Author
    Smith, S. V.
    Sleezer, R. O.
    Renwick, W. H.
    Buddemeier, Robert W.
    Publisher
    Ecological Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    Copyright by the Ecological Society of America
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    Abstract
    We have developed a mass balance analysis of organic carbon (OC) across the five major river subsystems of the Mississippi (MS) Basin (an area of 3.2 3 106 km2). This largely agricultural landscape undergoes a bulk soil erosion rate of ;480 t·km22·yr21 (;1500 3 106 t/yr, across the MS Basin), and a soil organic carbon (SOC) erosion rate of ;7 t·km22·yr21 (;22 3 106 t/yr). Erosion translocates upland SOC to alluvial deposits, water impoundments, and the ocean. Soil erosion is generally considered to be a net source of CO2 release to the atmosphere in global budgets. However, our results indicate that SOC erosion and relocation of soil apparently can reduce the net SOC oxidation rate of the original upland SOC while promoting net replacement of eroded SOC in upland soils that were eroded. Soil erosion at the MS Basin scale is, therefore, a net CO2 sink rather than a source.
    URI
    http://hdl.handle.net/1808/16739
    DOI
    https://doi.org/10.1890/05-0073
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1516]
    Citation
    Smith, S. V., Sleezer, R. O., Renwick, W. H., & Buddemeier, R. W. (2005). Fates of eroded soil organic carbon: mississippi basin case study. Ecological Applications, 15(6), 1929–1940. http://dx.doi.org/10.1890/05-0073

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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