caa a22 4500 606218149 CHVBK 20210128101111.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s11104-014-2314-3 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2314-3 Soil CO2 efflux and production rates as influenced by evapotranspiration in a dry grassland [Elektronische Daten] [János Balogh, Szilvia Fóti, Krisztina Pintér, Susanne Burri, Werner Eugster, Marianna Papp, Zoltán Nagy] Aims: Our aim was to study the effect of potential biotic drivers, including evapotranspiration (ET) and gross primary production (GPP), on the soil CO2 production and efflux on the diel time scale. Methods: Eddy covariance, soil respiration and soil CO2 gradient systems were used to measure the CO2 and H2O fluxes in a dry, sandy grassland in Hungary. The contribution of CO2 production from three soil layers to plot-scale soil respiration was quantified. CO2 production and efflux residuals after subtracting the effects of the main abiotic and biotic drivers were analysed. Results: Soil CO2 production showed a strong negative correlation with ET rates with a time lag of 0.5h in the two upper layers, whereas less strong, but still significant time-lagged and positive correlations were found between GPP and soil CO2 production. Our results suggest a rapid negative response of soil CO2 production rates to transpiration changes, and a delayed positive response to GPP. Conclusions: We found evidence for a combined effect of soil temperature and transpiration that influenced the diel changes in soil CO2 production. A possible explanation for this pattern could be that a significant part of CO2 produced in the soil may be transported across soil layers via the xylem. Springer International Publishing Switzerland, 2014 Diel timescale nationallicence Evapotranspiration nationallicence Gross primary production nationallicence Soil CO2 production nationallicence Time series analysis nationallicence Balogh János Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut Fóti Szilvia MTA-SZIE Plant Ecology Research Group, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut Pintér Krisztina Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut Burri Susanne Grassland Sciences Group, Institute of Agricultural Sciences, ETH Zurich, Universitätsstrasse 2, 8092, Zürich, Switzerland aut Eugster Werner Grassland Sciences Group, Institute of Agricultural Sciences, ETH Zurich, Universitätsstrasse 2, 8092, Zürich, Switzerland aut Papp Marianna MTA-SZIE Plant Ecology Research Group, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut Nagy Zoltán Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 157-173 0032-079X 388:1-2<157 2015 388 11104 https://doi.org/10.1007/s11104-014-2314-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2314-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Balogh János Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 700 1- Fóti Szilvia MTA-SZIE Plant Ecology Research Group, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 700 1- Pintér Krisztina Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 700 1- Burri Susanne Grassland Sciences Group, Institute of Agricultural Sciences, ETH Zurich, Universitätsstrasse 2, 8092, Zürich, Switzerland aut NATIONALLICENCE 700 1- Eugster Werner Grassland Sciences Group, Institute of Agricultural Sciences, ETH Zurich, Universitätsstrasse 2, 8092, Zürich, Switzerland aut NATIONALLICENCE 700 1- Papp Marianna MTA-SZIE Plant Ecology Research Group, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 700 1- Nagy Zoltán Institute of Botany and Ecophysiology, Szent István University, Páter u. 1, 2100, Gödöllő, Hungary aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 388/1-2(2015-03-01), 157-173 0032-079X 388:1-2<157 2015 388 11104