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Titel: Dissolved carbon leaching from soil is a crucial component of the net ecosystem carbon balance
Type: Journal articleJournal article
Person(er):
Forfatter:  Kindler, Reimo
University College Dublin (IE)

Forfatter:  Siemens, Jan
Technische Universität Dresden (DE)

Forfatter:  Kaiser, Klaus
Martin Luther University Halle-Wittenberg (DE)

Forfatter:  Walmsley, David C.
University College Dublin (IE)

Forfatter:  Bernhofer, Christian
Technische Universität Dresden (DE)

Forfatter:  Buchmann, Nina
ETH Zurich (CH)

Forfatter:  Cellier, Pierre
INRA – AgroParisTech – Unité Mixte de Recherche Environnement et Grandes Cultures (FR)

Forfatter:  Eugster, Werner
ETH Zurich (CH)

Forfatter:  Gleixner, Gerd
Max Planck Institute for Biogeochemistry (DE)

Forfatter:  Grünwald, Thomas
Technische Universität Dresden (DE)

Forfatter:  Heim, Alexander
University of Zurich (CH)

Forfatter:  Ibrom, Andreas (Cwisno: 38743)
Technical University of Denmark
Email:

Forfatter:  Joness, Stephanie K.
Centre for Ecology & Hydrology (GB)

Forfatter:  Jones, Mike
Trinity College Dublin (IE)

Forfatter:  Klumpp, Katja
Grassland Ecosystem Research (UREP) (FR)

Forfatter:  Kutsch, Werner
Johann Heinrich von Thuünen-Institut (DE)

Forfatter:  Larsen, Klaus Steenberg (Cwisno: 38801)
Technical University of Denmark
Email:

Forfatter:  Lehuger, Simon
INRA – AgroParisTech – Unité Mixte de Recherche Environnement et Grandes Cultures (FR)

Forfatter:  Loubet, Benjamin
INRA – AgroParisTech – Unité Mixte de Recherche Environnement et Grandes Cultures (FR)

Forfatter:  McKenzie, Rebecca
University of Manchester (GB)

Forfatter:  Moors, Eddy
Alterra Wageningen UR (NL)

Forfatter:  Osborne, Bruce
University College Dublin (IE)

Forfatter:  Pilegaard, Kim (Cwisno: 38527)
Technical University of Denmark
Email:

Forfatter:  Rebmann, Corinna
Helmholtz Centre for Environmental Research (DE)

Forfatter:  Saunders, Matthew
University College Dublin (IE)

Forfatter:  Schmidt, Michael W.I.
University of Zurich (CH)

Forfatter:  Schrumpf, Marion
Max Planck Institute for Biogeochemistry (DE)

Forfatter:  Seyfferth, Janine
Max Planck Institute for Biogeochemistry (DE)

Forfatter:  Skiba, Ute
Centre for Ecology & Hydrology (GB)

Forfatter:  Soussana, Jean-Francois
Grassland Ecosystem Research (UREP) (FR)

Forfatter:  Sutton, Mark QA.
Centre for Ecology & Hydrology (GB)

Forfatter:  Tefs, Cindy
Max Planck Institute for Biogeochemistry (DE)

Forfatter:  Vowinckel, Bernhard
Technische Universität Dresden (DE)

Forfatter:  Zeeman, Matthias J.
ETH Zurich (CH)

Forfatter:  Kaupenjohann, Martin
Technische Universität Berlin (DE)
Uddrag: Estimates of carbon leaching losses from different land use systems are few and their contribution to the net ecosystem carbon balance is uncertain. We investigated leaching of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), and dissolved methane (CH4), at forests, grasslands, and croplands across Europe. Biogenic contributions to DIC were estimated by means of its d13C signature. Leaching of biogenic DIC was 8.34.9 gm2 yr1 for forests, 24.17.2 gm2 yr1 for grasslands, and 14.64.8 gm2 yr1 for croplands. DOC leaching equalled 3.51.3 gm2 yr1 for forests, 5.32.0 gm2 yr1 for grasslands, and 4.11.3 gm2 yr1 for croplands. The average flux of total biogenic carbon across land use systems was 19.44.0 gCm2 yr1. Production of DOC in topsoils was positively related to their C/N ratio and DOC retention in subsoils was inversely related to the ratio of organic carbon to iron plus aluminium (hydr)oxides. Partial pressures of CO2 in soil air and soil pH determined DIC concentrations and fluxes, but soil solutions were often supersaturated with DIC relative to soil air CO2. Leaching losses of biogenic carbon (DOC plus biogenic DIC) from grasslands equalled 5–98% (median: 22%) of net ecosystem exchange (NEE) plus carbon inputs with fertilization minus carbon removal with harvest. Carbon leaching increased the net losses from cropland soils by 24–105% (median: 25%). For the majority of forest sites, leaching hardly affected actual net ecosystem carbon balances because of the small solubility of CO2 in acidic forest soil solutions and large NEE. Leaching of CH4 proved to be insignificant compared with other fluxes of carbon. Overall, our results show that leaching losses are particularly important for the carbon balance of agricultural systems.
Publiceret: in journal: Global Change Biology (ISSN: 1354-1013) (DOI: http://dx.doi.org/10.1111/j.1365-2486.2010.02282.x), vol: 17, issue: 2, pages: 1167-1185, 2011
DOI:
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