Simulating rewetting events in intermittent rivers and ephemeral streams: A global analysis of leached nutrients and organic matter
2019
Shumilova, Oleksandra | Zak, Dominik | Datry, T. | von Schiller, Daniel | Corti, Roland | Foulquier, Arnaud | Obrador, Biel | Tockner, Klement | Allan, Daniel C | Altermatt, Florian | Arce, María Isabel | Arnon, Shai | Banas, Damien | Banegas-Medina, Andy | Beller, Erin | Blanchette, Melanie L | Blanco-Libreros, Juan F | Blessing, Joanna | Boëchat, Iola Gonçalves | Boersma, Kate | Bogan, Michael T | Bonada, Núria | Bond, Nick R | Brintrup, Kate | Bruder, Andreas | Burrows, Ryan | Cancellario, Tommaso | Carlson, Stephanie M | Cauvy-Fraunié, Sophie | Cid, Núria | Danger, Michael | de Freitas Terra, Bianca | Girolamo, Anna Maria De | del Campo, Ruben | Dyer, Fiona | Elosegi, Arturo | Faye, Emile | Febria, Catherine | Figueroa, Ricardo | Four, Brian | Gessner, Mark O | Gnohossou, Pierre | Cerezo, Rosa Gómez | Gomez-Gener, Lluís | Graça, Manuel a S | Guareschi, Simone | Gücker, Björn | Hwan, Jason L | Kubheka, Skhumbuzo | Langhans, Simone Daniela | Leigh, Catherine | Little, Chelsea J | Lorenz, Stefan | Marshall, Jonathan | Mcintosh, Angus | Mendoza-Lera, Clara | Meyer, Elisabeth Irmgard | Miliša, Marko | Mlambo, Musa C | Moleón, Marcos | Negus, Peter | Niyogi, Dev | Papatheodoulou, Athina | Pardo, Isabel | Paril, Petr | Pešić, Vladimir | Rodriguez-Lozano, Pablo | Rolls, Robert J | Sanchez-Montoya, Maria Mar | Savić, Ana | Steward, Alisha | Stubbington, Rachel | Taleb, Amina | Vorste, Ross Vander | Waltham, Nathan | Zoppini, Annamaria | Zarfl, Christiane | Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) | Freie Universität Berlin | Università degli Studi di Trento = University of Trento (UNITN) | University of Rostock = Universität Rostock | Aarhus University [Aarhus] | RiverLy - Fonctionnement des hydrosystèmes ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Universidad del País Vasco [Espainia] / Euskal Herriko Unibertsitatea [España] = University of the Basque Country [Spain] = Université du pays basque [Espagne] (UPV / EHU) | Laboratoire d'Ecologie Alpine (LECA) ; Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) | Centre National de la Recherche Scientifique (CNRS) | Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) | Universitat de Barcelona (UB) | Austrian Science Fund (FWF) | University of Oklahoma (OU) | Universität Zürich [Zürich] = University of Zurich (UZH) | Centro de Edafologia y Biologia Aplicada del Segura | Ben-Gurion University of the Negev (BGU) | Unité de Recherches Animal et Fonctionnalités des Produits Animaux (URAFPA) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Universidad de Concepción = University of Concepción [Chile] (UdeC) | University of California [Berkeley] (UC Berkeley) ; University of California (UC) | Edith Cowan University | Universidad de Antioquia = University of Antioquia [Medellín, Colombia] | Queensland Government - Department of Agriculture and Fisheries (DAF) | Universidade Federal de São João del-Rei (UFSJ) | University of California [San Diego] (UC San Diego) ; University of California (UC) | University of Arizona | Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona (UAB) | La Trobe University | University of Applied Sciences and Arts Switzerland | Griffith University [Brisbane] | University of Navarra | Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) | Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) | Universidade Estadual Vale do Acarau | National Council of Research | Water Research Institute | Universidad de Murcia | University of Canberra | Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | University of Canterbury [Christchurch] | University of Windsor [Ca] | Département Ecologie des Forêts, Prairies et milieux Aquatiques (DEPT EFPA) ; Institut National de la Recherche Agronomique (INRA) | Berlin Institute of Technology | Université de Parakou = University of Parakou (UP) | Department of Ecology and Environmental Science [Umeå] ; Umeå University = Umeå Universitet | Universidade de Coimbra = University of Coimbra [Portugal] (UC) | Ezemvelo KZN Wildlife | University of Otago [Dunedin, Nouvelle-Zélande] | Basque Centre for Climate Change (BC3) | Queensland University of Technology [Brisbane] (QUT) | Swiss Federal Institute of Aquatic Science and Technology [Dübendorf] (EAWAG) | Julius Kühn-Institut (JKI) | Brandenburgische Technische Universität = Brandenburg Technical University (BTU) | Westfälische Wilhelms-Universität Münster = University of Münster (WWU) | University of Zagreb | Rhodes University [Grahamstown] | Universidad de Granada = University of Granada (UGR) | Missouri University of Science and Technology (Missouri S&T) ; University of Missouri System | Terra Cypria - Cyprus Conservation Foundation | Universidade de Vigo | Masaryk University [Brno] = Masarykova univerzita [Brno] = Université Masaryk [Brno] (MU / MUNI) | University of Montenegro (UCG) | University of New England (UNE) | University of Niš | Nottingham Trent University | Université Aboubekr Belkaid de Tlemcen = University of Belkaïd Abou Bekr [Tlemcen] | James Cook University (JCU) | Eberhard Karls Universität Tübingen = University of Tübingen
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiples
Afficher plus [+] Moins [-]International audience
Afficher plus [+] Moins [-]anglais. Climate change and human pressures are changing the global distribution and the extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico-chemical changes (preconditioning), and periods of flow resumption, when these substrates are rewetted and release pulses of dissolved nutrients and organic matter (OM). However, there are no estimates of the amounts and quality of leached substances, nor is there information on the underlying environmental constraints operating at the global scale. We experimentally simulated, under standard laboratory conditions, rewetting of leaves, riverbed sediments, and epilithic biofilms collected during the dry phase across 205 IRES from five major climate zones. We determined the amounts and qualitative characteristics of the leached nutrients and OM, and estimated their areal fluxes from riverbeds. In addition, we evaluated the variance in leachate characteristics in relation to selected environmental variables and substrate characteristics. We found that sediments, due to their large quantities within riverbeds, contribute most to the overall flux of dissolved substances during rewetting events (56%-98%), and that flux rates distinctly differ among climate zones. Dissolved organic carbon, phenolics, and nitrate contributed most to the areal fluxes. The largest amounts of leached substances were found in the continental climate zone, coinciding with the lowest potential bioavailability of the leached OM. The opposite pattern was found in the arid zone. Environmental variables expected to be modified under climate change (i.e. potential evapotranspiration, aridity, dry period duration, land use) were correlated with the amount of leached substances, with the strongest relationship found for sediments. These results show that the role of IRES should be accounted for in global biogeochemical cycles, especially because prevalence of IRES will increase due to increasing severity of drying events.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Institut national de la recherche agronomique
Découvrez la collection de ce fournisseur de données dans AGRIS