Erosion of upland hillslope soil organic carbon: Coupling field measurements with a sediment transport model
Little is known about the role of vegetated hillslope sediment transport in the soil C cycle and soil‐atmosphere C exchange. We combined a hillslope sediment transport model with empirical soil C measurements to quantify the erosion and temporal storage of soil organic carbon (SOC) within two grassl...
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| Veröffentlicht in: | Global biogeochemical cycles 2005-09, Vol.19 (3), p.GB3003.1-n/a |
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| creator | Yoo, Kyungsoo Amundson, Ronald Heimsath, Arjun M. Dietrich, William E. |
| description | Little is known about the role of vegetated hillslope sediment transport in the soil C cycle and soil‐atmosphere C exchange. We combined a hillslope sediment transport model with empirical soil C measurements to quantify the erosion and temporal storage of soil organic carbon (SOC) within two grasslands in central California. The sites have contrasting erosional mechanisms: biological perturbation (Tennessee Valley (TV)) versus clay‐rich soil creep (Black Diamond (BD)). The average SOC erosion rates from convex slopes were 1.4–2.7 g C m−2 yr−1 at TV and 5–8 g C m−2 yr−1 at BD, values that are |
| doi_str_mv | 10.1029/2004GB002271 |
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We combined a hillslope sediment transport model with empirical soil C measurements to quantify the erosion and temporal storage of soil organic carbon (SOC) within two grasslands in central California. The sites have contrasting erosional mechanisms: biological perturbation (Tennessee Valley (TV)) versus clay‐rich soil creep (Black Diamond (BD)). The average SOC erosion rates from convex slopes were 1.4–2.7 g C m−2 yr−1 at TV and 5–8 g C m−2 yr−1 at BD, values that are <10% of above ground net primary productivity (ANPP) at both sites. The eroded soil accumulates on depositional slopes. The long term SOC accumulation (or C sink) rates are ∼1.9 g C m−2 yr−1 in the TV hollow and 1.7–2.8 g C m−2 yr−1 in the BD footslope. We found that the hillslope C sink is driven primarily by the burial of in situ plant production rather than preservation of eroded SOC, a finding that differs from existing hypotheses. At TV, the net sequestration of atmospheric C by long‐term hollow evacuation and refilling depends on the fate of the C exported from the zero order watershed. This study suggests that erosion and deposition are coupled processes that create a previously unrecognized C sink in undisturbed upland watersheds, with a potential to substantially affect the global C balance presently, and over geological timescales.</description><identifier>ISSN: 0886-6236</identifier><identifier>EISSN: 1944-9224</identifier><identifier>DOI: 10.1029/2004GB002271</identifier><identifier>CODEN: GBCYEP</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Freshwater ; Fundamental and applied biological sciences. 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Cycles</addtitle><description>Little is known about the role of vegetated hillslope sediment transport in the soil C cycle and soil‐atmosphere C exchange. We combined a hillslope sediment transport model with empirical soil C measurements to quantify the erosion and temporal storage of soil organic carbon (SOC) within two grasslands in central California. The sites have contrasting erosional mechanisms: biological perturbation (Tennessee Valley (TV)) versus clay‐rich soil creep (Black Diamond (BD)). The average SOC erosion rates from convex slopes were 1.4–2.7 g C m−2 yr−1 at TV and 5–8 g C m−2 yr−1 at BD, values that are <10% of above ground net primary productivity (ANPP) at both sites. The eroded soil accumulates on depositional slopes. The long term SOC accumulation (or C sink) rates are ∼1.9 g C m−2 yr−1 in the TV hollow and 1.7–2.8 g C m−2 yr−1 in the BD footslope. We found that the hillslope C sink is driven primarily by the burial of in situ plant production rather than preservation of eroded SOC, a finding that differs from existing hypotheses. At TV, the net sequestration of atmospheric C by long‐term hollow evacuation and refilling depends on the fate of the C exported from the zero order watershed. This study suggests that erosion and deposition are coupled processes that create a previously unrecognized C sink in undisturbed upland watersheds, with a potential to substantially affect the global C balance presently, and over geological timescales.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Freshwater</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects</subject><subject>Geochemistry</subject><subject>hillslope sediment transport</subject><subject>soil erosion and deposition</subject><subject>soil organic carbon</subject><subject>Synecology</subject><issn>0886-6236</issn><issn>1944-9224</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNp9kE9v1DAQxS0EEkvhxgfwBU6EevwvMTe6KlukCpAAcbSGxGkNThw8WZV-e7zainLiNNLT7z3Ne4w9B_EahHSnUgi9OxNCyhYesA04rRsnpX7INqLrbGOlso_ZE6IfQoA2xm1YOi-ZYp55Hvl-STgP_DqmRCkvgVOOiedyhXPseY_le57f8G2uXJyv-BhDGvgUkPYlTGFeid_E9ZojpzDEg8DXgjMtuax8ykNIT9mjEROFZ3f3hH19d_5le9Fcfty93769bFA5Zxs5SGVQBCN7aUwHAOic0R04FPVxrMIoDyV7cDYMpjWgjGyHESVoBKVO2Mtj7lLyr32g1U-R-pBqvZD35KFVxkqtK_jqCPZ1BSph9EuJE5ZbD8IfJvX_TlrxF3e5SD2msbbrI917WgmdA1c5OHI3MYXb_2b63dkWoLXV0xw9kdbw-68Hy09vW9Ua_-3Dzjtx8emz0tZr9QdUXZJC</recordid><startdate>200509</startdate><enddate>200509</enddate><creator>Yoo, Kyungsoo</creator><creator>Amundson, Ronald</creator><creator>Heimsath, Arjun M.</creator><creator>Dietrich, William E.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7TG</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>200509</creationdate><title>Erosion of upland hillslope soil organic carbon: Coupling field measurements with a sediment transport model</title><author>Yoo, Kyungsoo ; Amundson, Ronald ; Heimsath, Arjun M. ; Dietrich, William E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a3996-2d235a0e52c2558111a9954819a0001a111f20227c196ed57513527dfa214a133</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Biological and medical sciences</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Freshwater</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects</topic><topic>Geochemistry</topic><topic>hillslope sediment transport</topic><topic>soil erosion and deposition</topic><topic>soil organic carbon</topic><topic>Synecology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yoo, Kyungsoo</creatorcontrib><creatorcontrib>Amundson, Ronald</creatorcontrib><creatorcontrib>Heimsath, Arjun M.</creatorcontrib><creatorcontrib>Dietrich, William E.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Global biogeochemical cycles</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yoo, Kyungsoo</au><au>Amundson, Ronald</au><au>Heimsath, Arjun M.</au><au>Dietrich, William E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Erosion of upland hillslope soil organic carbon: Coupling field measurements with a sediment transport model</atitle><jtitle>Global biogeochemical cycles</jtitle><addtitle>Global Biogeochem. Cycles</addtitle><date>2005-09</date><risdate>2005</risdate><volume>19</volume><issue>3</issue><spage>GB3003.1</spage><epage>n/a</epage><pages>GB3003.1-n/a</pages><issn>0886-6236</issn><eissn>1944-9224</eissn><coden>GBCYEP</coden><abstract>Little is known about the role of vegetated hillslope sediment transport in the soil C cycle and soil‐atmosphere C exchange. We combined a hillslope sediment transport model with empirical soil C measurements to quantify the erosion and temporal storage of soil organic carbon (SOC) within two grasslands in central California. The sites have contrasting erosional mechanisms: biological perturbation (Tennessee Valley (TV)) versus clay‐rich soil creep (Black Diamond (BD)). The average SOC erosion rates from convex slopes were 1.4–2.7 g C m−2 yr−1 at TV and 5–8 g C m−2 yr−1 at BD, values that are <10% of above ground net primary productivity (ANPP) at both sites. The eroded soil accumulates on depositional slopes. The long term SOC accumulation (or C sink) rates are ∼1.9 g C m−2 yr−1 in the TV hollow and 1.7–2.8 g C m−2 yr−1 in the BD footslope. We found that the hillslope C sink is driven primarily by the burial of in situ plant production rather than preservation of eroded SOC, a finding that differs from existing hypotheses. At TV, the net sequestration of atmospheric C by long‐term hollow evacuation and refilling depends on the fate of the C exported from the zero order watershed. This study suggests that erosion and deposition are coupled processes that create a previously unrecognized C sink in undisturbed upland watersheds, with a potential to substantially affect the global C balance presently, and over geological timescales.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2004GB002271</doi><tpages>17</tpages></addata></record> |
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| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Earth sciences Earth, ocean, space Exact sciences and technology Freshwater Fundamental and applied biological sciences. Psychology General aspects Geochemistry hillslope sediment transport soil erosion and deposition soil organic carbon Synecology |
| title | Erosion of upland hillslope soil organic carbon: Coupling field measurements with a sediment transport model |
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