caa a22 4500 445384263 CHVBK 20180317143027.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10021-010-9405-7 doi (NATIONALLICENCE)springer-10.1007/s10021-010-9405-7 Effects of Climate Change Drivers on Nitrous Oxide Fluxes in an Upland Temperate Grassland [Elektronische Daten] [Amélie Cantarel, Juliette Bloor, Nicolas Deltroy, Jean-François Soussana] Despite increasing interest in the patterns of trace gas emissions in terrestrial ecosystems, little is known about the impacts of climate change on nitrous oxide (N2O) fluxes. The aim of this study was to determine the importance of the three main drivers of climate change (warming, summer drought, and elevated CO2 concentrations) on N2O fluxes from an extensively managed, upland grassland. Over a 2-year period, we monitored N2O fluxes in an in situ ecosystem manipulation experiment simulating the climate predicted for the study area in 2080 (3.5°C temperature increase, 20% reduction in summer rainfall and atmospheric CO2 levels of 600ppm). N2O fluxes showed significant seasonal and interannual variation irrespective of climate treatment, and were higher in summer and autumn compared with winter and spring. Overall, N2O emissions showed a positive correlation with soil temperature and rainfall. Elevated temperature had a positive impact on mean annual N2O fluxes but effects were only significant in 2007. Contrary to expectations, neither combined summer drought and warming nor the simultaneous application of elevated atmospheric CO2 concentrations, summer drought and warming had any significant effect on annual N2O fluxes. However, the maximum N2O flux rates observed during the study occurred when elevated CO2 was combined with warming and drought, suggesting the potential for important, short-term N2O-N losses in enriched CO2 environments. Taken together, our results suggest that the N2O responses of temperate, extensively managed grasslands to future climate change scenarios may be primarily driven by temperature effects. Springer Science+Business Media, LLC, 2010 drought nationallicence elevated CO2 nationallicence grasslands nationallicence interannual variation nationallicence nitrous oxide emission nationallicence warming nationallicence Cantarel Amélie INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut Bloor Juliette INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut Deltroy Nicolas Département Génie Industriel et Maintenance, Ensemble Universitaire des Cézeaux, 63172, Aubière, France aut Soussana Jean-François INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut Ecosystems Springer-Verlag 14/2(2011-03-01), 223-233 1432-9840 14:2<223 2011 14 10021 https://doi.org/10.1007/s10021-010-9405-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-010-9405-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cantarel Amélie INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut NATIONALLICENCE 700 1- Bloor Juliette INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut NATIONALLICENCE 700 1- Deltroy Nicolas Département Génie Industriel et Maintenance, Ensemble Universitaire des Cézeaux, 63172, Aubière, France aut NATIONALLICENCE 700 1- Soussana Jean-François INRA, UR874-Grassland Ecosystem Research Unit, 234 Avenue du Brézet, 63100, Clermont-Ferrand, France aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/2(2011-03-01), 223-233 1432-9840 14:2<223 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer