1. Night-time measurements highly relevant for assessing stream CO2 fluxes: a Cross-European study
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Attermeyer, K., Audet, J., Barral Fraga, L., Basic, T., Bednarik, A., Busst, G., Casas Ruiz, J. P., Catalan, N., sophie Cauvy-Fraunié, Colls, M., Eyto, E., Deininger, A., Doretto, A., Doyle, B. C., Evtimova, V., Fenoglio, S., Fletcher, D., Fonvielle, J. A., Freixa, A., Fuss, T., Gilbert, P., Guttman Roberts, C., Herrero Ortega, S., Kenderov, L. A., Klaus, M., Ledesma, J. L. J., Lianqiu Liu, Mendoza Lera, C., Monteiro, J., Mor, J. R., Nagler, M., Niedrist, G. H., Noss, C., Nydahl, A. C., Pansch, N., Amandine Pastor, Pegg, J., Pilotto, F., Portela, A. P., Gonzalez Quijano, C. R., Romero, F., Rulik, M., Danny Sheath, Simov, N., Timoner, X., Bodmer, P., LIMNOLOGY DEPARTMENT OF ECOLOGY AND GENETICS UPPSALA UNIVERSITY SWE, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), WASSERCLUSTER LUNZ AUSTRIA, Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), INSTITUTE OF AQUATIC ECOLOGY UNIVERSITY OF GIRONA ESP, DEPARTMENT OF LIFE AND ENVIRONMENTAL SCIENCES BOURNEMOUTH UNIVERSITY FERN BARROW POOLE DORSET GBR, Department of Ecology and Environmental Sciences [Univ Palacký], Faculty of Science [Univ Palacký], Palacky University Olomouc-Palacky University Olomouc, RESOURCES AND ECOSYSTEMS CATALAN INSTITUTE FOR WATER RESEARCH GIRONA ESP, RiverLy (UR Riverly), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), MARINE INSTITUTE FURNACE NEWPORT CO MAYO IRELAND GBR, DEPARTMENT OF ECOLOGY AND ENVIRONMENTAL SCIENCE UMEA UNIVERSITY SWE, Department of Life Sciences and Systems Biology [University of Turin], University of Turin, CENTRE FOR FRESHWATER AND ENVIRONMENTAL STUDIES DUNDALK INSTITUTE OF TECHNOLOGY CO LOUTH IRELAND GBR, DEPARTMENT OF AQUATIC ECOSYSTEMS INSTITUTE OF BIODIVERSITY AND ECOSYSTEM RESEARCH BULGARIAN ACADEMY OF SCIENCES SOFIA BGR, DEPARTMENT OF SCIENCES AND TECHNOLOGICAL INNOVATION UNIVERSITY OF PIEMONTE ORIENTALE ALESSANDRIA ITALY, EXPERIMENTAL LIMNOLOGY LEIBNIZINSTITUTE OF FRESHWATER ECOLOGY AND INLAND FISHERIES STECHLIN DEU, ECOSYSTEMS AND GLOBAL CHANGE GROUP DEPARTMENT OF PLANT SCIENCES UNIVERSITY OF CAMBRIDGE GBR, ECOHYDROLOGY LEIBNIZ-INSTITUTE OF FRESHWATER ECOLOGY AND INLAND FISHERIES BERLIN DEU, ENVIRONMENTAL RESEARCH INSTITUTE UNIVERSITY OF HIGHLANDS AND ISLANDS THURSO SCOTLAND GBR, DEPARTMENT OF GENERAL AND APPLIED HYDROBIOLOGY SOFIA UNIVERSITY ST. KLIMENT OHRIDSKI BULGARIA, INSTITUTE FOR ENVIRONMENTAL SCIENCES UNIVERSITY OF KOBLENZLANDAU LANDAU DEU, CENTRE FOR ECOLOGY EVOLUTION AND ENVIRONMENTAL CHANGES FACULTY OF SCIENCES UNIVERSITY OF LISBON PRT, DEPARTMENT OF EVOLUTIONARY BIOLOGY ECOLOGY AND ENVIRONMENTAL SCIENCES FACULTY OF BIOLOGY UNIVERSITY OF BARCELONA ESP, MICROBIAL RESOURCE MANAGEMENT INSTITUTE OF MICROBIOLOGY UNIVERSITY OF INNSBRUCK AUT, RIVER ECOLOGY AND CONSERVATION RESEARCH DEPARTMENT OF ECOLOGY UNIVERSITY OF INNSBRUCK, AUSTRIA, RESEARCH CENTER IN BIODIVERSITY AND GENETIC RESOURCES FACULTY OF SCIENCES UNIVERSITY OF PORTO PRT, INSTITUTE OF GLOBAL HEALTH FACULTY OF MEDICINE UNIVERSITY OF GENEVA CHE, NATIONAL MUSEUM OF NATURAL HISTORY SOFIA BGR, and CHEMICAL ANALYTICS AND BIOGEOCHEMISTRY LEIBNIZINSTITUTE OF FRESHWATER ECOLOGY AND INLAND FISHERIES BERLIN DEU
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[SDE]Environmental Sciences - Abstract
International audience; Globally, streams represent major CO2 emitters, accounting for approximately 70% of the total flux from inland waters. Hence, a proper understanding of carbon dioxide (CO2) uptake and emissions from streams is crucial for accurately estimating aquatic global carbon emissions. However, diurnal dynamics of these fluxes are still not comprehensively quantified, contributing to a high uncertainty in regional and global carbon budgets. Within the EuroRun project, the 1st Collaborative European Freshwater Science Project for Young Researchers, we aimed to assess spatial and seasonal variability of day- and night-time CO2 fluxes of 34 streams across 11 European countries. CO2 fluxes were measured with drifting flux chambers once per season at midday and midnight. The median CO2 fluxes during the day amounted to 1.4 µmol m-2 h-1 (IQR 0.5 to 3.1) and during the night to 2.1 µmol m-2 h-1 (IQR 0.95 to 3.75). The CO2 fluxes during night exceeded those during day by up to eight times. Interestingly, these differences occurred throughout all seasons and showed no latitudinal patterns. Our results highlight the importance of night-time fluxes to accurately assess CO2 fluxes from streams. As most studies are performed during the day, our survey indicates that global carbon budgets are currently underestimating the amount of CO2 released by streams.
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- 2019