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1. ESPEN guideline on hospital nutrition

Author

Stephan C. Bischoff, Elisabet Rothenberg, M. Vaillant, Ulla Siljamäki-Ojansuu, Elina Ioannou, Karen Ottens-Oussoren, Osman Abbasoglu, Laila Meija, Ronan Thibault, Diana Rubin, Claude Pichard, CHU Pontchaillou [Rennes], Nutrition, Métabolismes et Cancer (NuMeCan), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Service d'endocrinologie diabétologie et nutrition [Rennes], Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-CHU Pontchaillou [Rennes]-Hôpital Anne-de-Bretagne, Faculty of Medicine [Hacettepe University], Hacettepe University = Hacettepe Üniversitesi, Limassol General Hospital, Riga Stradins University (RSU), VU University Medical Center [Amsterdam], Hôpitaux Universitaires de Genève (HUG), Kristianstad University College - HKR (SWEDEN), Tampere University Hospital, CHU Grenoble, Université Joseph Fourier - Grenoble 1 (UJF)-CHU Grenoble, University of Hohenheim, This guideline was solely financed by ESPEN, the European Society for Clinical Nutrition and Metabolism., Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Université de Rennes (UR)-CHU Pontchaillou [Rennes]-Hôpital Anne-de-Bretagne

Subjects
medicine.medical_specialty, Monitoring, [SDV]Life Sciences [q-bio], Acute care, Clinical nutrition, Critical Care and Intensive Care Medicine, 03 medical and health sciences, Patient safety, 0302 clinical medicine, Intolerances, Food intake, medicine, 030212 general & internal medicine, Medical prescription, ddc:616, 2. Zero hunger, Nutrition and Dietetics, business.industry, Malnutrition, Guideline, Diets, medicine.disease, Obesity, 3. Good health, Family medicine, 030211 gastroenterology & hepatology, business, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition
Abstract

International audience; In hospitals through Europe and worldwide, the practices regarding hospital diets are very heterogeneous. Hospital diets are rarely prescribed by physicians, and sometimes the choices of diets are based on arbitrary reasons. Often prescriptions are made independently from the evaluation of nutritional status, and without taking into account the nutritional status. Therapeutic diets (low salt, gluten-free, texture and consistency modified, …) are associated with decreased energy delivery (i.e. underfeeding) and increased risk of malnutrition. The European Society for Clinical Nutrition and Metabolism (ESPEN) proposes here evidence-based recommendations regarding the organization of food catering, the prescriptions and indications of diets, as well as monitoring of food intake at hospital, rehabilitation center, and nursing home, all of these by taking into account the patient perspectives. We propose a systematic approach to adapt the hospital food to the nutritional status and potential food allergy or intolerances. Particular conditions such as patients with dysphagia, older patients, gastrointestinal diseases, abdominal surgery, diabetes, and obesity, are discussed to guide the practitioner toward the best evidence based therapy. The terminology of the different useful diets is defined. The general objectives are to increase the awareness of physicians, dietitians, nurses, kitchen managers, and stakeholders towards the pivotal role of hospital food in hospital care, to contribute to patient safety within nutritional care, to improve coverage of nutritional needs by hospital food, and reduce the risk of malnutrition and its related complications.

Published
2021
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2. Reply to letter to the editor by Riquelme LF et al. entitled 'IDDSI letter to the editor'

Author

Elisabet Rothenberg, Stephan C. Bischoff, Ronan Thibault, Jonchère, Laurent, Kristianstad University College - HKR (SWEDEN), University of Hohenheim, CHU Pontchaillou [Rennes], Nutrition, Métabolismes et Cancer (NuMeCan), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and This ESPEN hospital nutrition guideline was solely financed by ESPEN, the European Society for Clinical Nutrition and Metabolism

Subjects
[SDV.AEN] Life Sciences [q-bio]/Food and Nutrition, Nutrition and Dietetics, Texture modification, Critical Care and Intensive Care Medicine, Terminology, International Dysphagia Diet Standardisation Initiative (IDDSI), [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2022
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3. Thermal conditions predict intraspecific variation in senescence rate in frogs and toads

Author

Rebecca McCaffery, Erin Muths, Lisa A. Eby, David S. Pilliod, Johan Elmberg, Benedikt R. Schmidt, Jérôme M. W. Gippet, Thierry Frétey, Blake R. Hossack, Omar Lenzi, Jean-François Lemaître, Bernard Le Garff, Jean-Michel Gaillard, Brad A. Lambert, Kurt Grossenbacher, Juha Merilä, Hugo Cayuela, University of Zurich, Université de Lausanne = University of Lausanne (UNIL), Biodémographie évolutive, Département écologie évolutive [LBBE], Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Ecologie et évolution des populations, United States Geological Survey (USGS), Biodiversité et gestion des territoires, Université de Rennes (UR), University of Montana, Colorado State University [Fort Collins] (CSU), Kristianstad University College - HKR (SWEDEN), Helsingin yliopisto = Helsingfors universitet = University of Helsinki, The University of Hong Kong (HKU), H.C. was supported as a postdoctoral researcher by the Swiss National Science Foundation (Grant No. 31003A_182265). J.M. acknowledges financial support from the Academy of Finland and the University of Helsinki as well as logistic support provide by the Kilpisjärvi Biological Station of the University of Helsinki. J.E. was supported by the Verner von Heidenstam Fund, the Swedish Environmental Protection Agency, and the Swedish Natural Science Research Council. The funding for field work was supported by Boise State University, the Bureau of Land Management, Colorado Parks and Wildlife, the Idaho Department of Fish and Game, the Nevada Department of Wildlife, the University of Montana, the University of Nevada Reno, the US Fish and Wildlife Service, the US Forest Service and US Geological Survey (USGS), and the Swiss Federal Office for the Environment., Organismal and Evolutionary Biology Research Programme, Ecological Genetics Research Unit, University of Lausanne (UNIL), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), and University of Helsinki

Subjects
0106 biological sciences, demography, senescence, Ranidae, Range (biology), [SDV]Life Sciences [q-bio], Global Warming, 01 natural sciences, RANA-TEMPORARIA, LONGEVITY, Bufo, POPULATION, 0303 health sciences, amphibians, Multidisciplinary, biology, Ecology, Biodiversity, Biological Sciences, Europe, Ectotherm, 1181 Ecology, evolutionary biology, SURVIVAL, 590 Animals (Zoology), Anura, Senescence, SEX-DIFFERENCES, Climate Change, Context (language use), ectotherms, COMMON FROGS, 010603 evolutionary biology, Intraspecific competition, 10127 Institute of Evolutionary Biology and Environmental Studies, 03 medical and health sciences, Temperate climate, Animals, TOLERANCE, AGING RATES, climate, Rana luteiventris, 030304 developmental biology, aging, temperature, biology.organism_classification, Bufonidae, 13. Climate action, North America, 570 Life sciences, amphibian, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; Variation in temperature is known to influence mortality patterns in ectotherms. Even though a few experimental studies on model organisms have reported a positive relationship between temperature and actuarial senescence (i.e., the increase in mortality risk with age), how variation in climate influences the senescence rate across the range of a species is still poorly understood in free-ranging animals. We filled this knowledge gap by investigating the relationships linking senescence rate, adult lifespan, and climatic conditions using long-term capture–recapture data from multiple amphibian populations. We considered two pairs of related anuran species from the Ranidae ( Rana luteiventris and Rana temporaria ) and Bufonidae ( Anaxyrus boreas and Bufo bufo ) families, which diverged more than 100 Mya and are broadly distributed in North America and Europe. Senescence rates were positively associated with mean annual temperature in all species. In addition, lifespan was negatively correlated with mean annual temperature in all species except A. boreas . In both R. luteiventris and A. boreas , mean annual precipitation and human environmental footprint both had negligible effects on senescence rates or lifespans. Overall, our findings demonstrate the critical influence of thermal conditions on mortality patterns across anuran species from temperate regions. In the current context of further global temperature increases predicted by Intergovernmental Panel on Climate Change scenarios, a widespread acceleration of aging in amphibians is expected to occur in the decades to come, which might threaten even more seriously the viability of populations and exacerbate global decline.

Published
2021
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4. University students’ understandings of concept relations and preferred representations of continuity and differentiability

Author

Juter, Kristina and Kristianstad University College - HKR (SWEDEN)

Subjects
understanding, Calculus, ComputingMilieux_COMPUTERSANDEDUCATION, representations, Educational Sciences, [MATH]Mathematics [math], continuity, ComputingMilieux_MISCELLANEOUS, Utbildningsvetenskap, [SHS]Humanities and Social Sciences, differentiability
Abstract

The aim of the study reported in this paper is to investigate how students understand continuity and differentiability during and after a calculus course. The students’ choices of representations, both claimed and acted, were also studied. The study is part of a larger study of four student groups taking a calculus course. 207 students answered a questionnaire during the course and of them, 11 were interviewed after the course (the ones in this paper). Answers in questionnaires and interviews were categorised and compared. All students who preferred formal theoretical representations, and only those students, were able to produce formal proofs. The students’ stated and acted preferencesof representations were quite coherent, with only a few inconsistencies.

Published
2017

5. Litter Decomposition as an Indicator of Stream Ecosystem Functioning at Local-to-Continental Scales

Author

Chauvet, Eric, Ferreira, Verónica, Giller, Paul S., McKie, Brendan G., Tiegs, Scott D., Woodward, Guy, Elosegi, Arturo, Dobson, Michael, Fleituch, Tadeusz, Graça, Manuel A. S., Gulis, Vladislav, Hladyz, Sally, Lacoursiere, Jean O., Lecerf, Antoine, Pozo, Jesús, Preda, Elena, Riipinen, Miira P., Risnoveanu, Geta, Vadineanu, Angheluta, Vought, Lena B.-M., Gessner, Mark O., Centre National de la Recherche Scientifique - CNRS (FRANCE), Universidade de Coimbra (PORTUGAL), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Polish Academy of Sciences (POLAND), Technische Universität Berlin - TU Berlin (GERMANY), University College Cork (IRELAND), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Universidad del País Vasco - Euskal Herriko Unibertsitatea - EHU (SPAIN), University of Bucharest (ROMANIA), Coastal Carolina University - CCU (USA), Edinburgh Technopole (UNITED KINGDOM), Imperial College London (UNITED KINGDOM), Kristianstad University College - HKR (SWEDEN), Leibniz-Institute of Freshwater Ecology and Inland Fisheries - IGB (GERMANY), Monash University (AUSTRALIA), Oakland University (USA), Plymouth University (UNITED KINGDOM), Sveriges lantbruksuniversitet - SLU (SWEDEN), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Swedish University of Agricultural Sciences (SLU), Oakland University (UNITED STATES), Imperial College London, Coastal Carolina University - CCU (UNITED STATES), and Plymouth University

Subjects
River, Biodiversité et Ecologie, Ecosystem functioning, Stream, Riparian forest, Biodiversity, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Functional assessment, Leaf litter decomposition, Nutrient, Management
Abstract

International audience; RivFunction is a pan-European initiative that started in 2002 and was aimed at esta- blishing a novel functional-based approach to assessing the ecological status of rivers. Litter decomposition was chosen as the focal process because it plays a central role in stream ecosystems and is easy to study in the field. Impacts of two stressors that occur across the continent, nutrient pollution and modified riparian vegetation, were exam- ined at >200 paired sites in nine European ecoregions. In response to the former, decomposition was dramatically slowed at both extremes of a 1000-fold nutrient gra- dient, indicating nutrient limitation in unpolluted sites, highly variable responses across Europe in moderately impacted streams, and inhibition via associated toxic and addi- tional stressors in highly polluted streams. Riparian forest modification by clear cutting or replacement of natural vegetation by plantations (e.g. conifers, eucalyptus) or pasture produced similarly complex responses. Clear effects caused by specific riparian distur- bances were observed in regionally focused studies, but general trends across different types of riparian modifications were not apparent, in part possibly because of important indirect effects. Complementary field and laboratory experiments were undertaken to tease apart the mechanistic drivers of the continental scale field bioassays by addressing the influence of litter, fungal and detritivore diversity. These revealed generally weak and context-dependent effects on decomposition, suggesting high levels of redundancy (and hence potential insurance mechanisms that can mitigate a degree of species loss) within the food web. Reduced species richness consistently increased decomposition variability, if not the absolute rate. Further field studies were aimed at identifying impor- tant sources of this variability (e.g. litter quality, temporal variability) to help constrain ranges of predicted decomposition rates in different field situations. Thus, although many details still need to be resolved, litter decomposition holds considerable potential in some circumstances to capture impairment of stream ecosystem functioning. For instance, species traits associated with the body size and metabolic capacity of the con- sumers were often the main driver at local scales, and these were often translated into important determinants of otherwise apparently contingent effects at larger scales. Key insights gained from conducting continental scale studies included resolving the appar- ent paradox of inconsistent relationships between nutrients and decomposition rates, as the full complex multidimensional picture emerged from the large-scale dataset, of which only seemingly contradictory fragments had been seen previously.

Published
2016
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6. Continental-Scale Effects of Nutrient Pollution on Stream Ecosystem Functioning

Author

Angheluta Vadineanu, Markus Schindler, Scott D. Tiegs, Tadeusz Fleituch, Jesús Pozo, Mark O. Gessner, Michael Dobson, Björn Malmqvist, Manuel A. S. Graça, Lena B. M. Vought, Antoine Lecerf, Verónica Ferreira, Helen Cariss, Sally Hladyz, Paul S. Giller, Brendan G. McKie, Marius Nistorescu, Vladislav Gulis, Eric Chauvet, Guy Woodward, Geta Rîşnoveanu, Arturo Elosegi, Jean O. Lacoursière, University College Cork (UCC), Queen Mary University of London (QMUL), Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf] (EAWAG), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB), Leibniz Association, Technische Universität Berlin (TU), Universidade de Coimbra [Coimbra], Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Umeå University, Oakland University, Manchester Metropolitan University (MMU), Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne] (UPV/EHU), Polska Akademia Nauk = Polish Academy of Sciences (PAN), Kristianstad University College - HKR (SWEDEN), University of Bucharest (UniBuc), Centre National de la Recherche Scientifique - CNRS (FRANCE), Universidade de Coimbra (PORTUGAL), Leibniz-Institut für Gewässerökologie und Binnenfischerei - IGB (GERMANY), Institut National Polytechnique de Toulouse - INPT (FRANCE), Polish Academy of Sciences (POLAND), Technische Universität Berlin - TU Berlin (GERMANY), University College Cork (IRELAND), Umea University (SWEDEN), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Universidad del País Vasco - Euskal Herriko Unibertsitatea - EHU (SPAIN), University of Bucharest (ROMANIA), Swiss Federal Institute of Aquatic Science and Technology - EAWAG (SWITZERLAND), Manchester Metropolitan University - MMU (UNITED KINGDOM), Oakland University (USA), Queen Mary University of London - QMUL (UNITED KINGDOM), Eidgenössische Technische Hochschule Zürich - ETHZ (SWITZERLAND), Laboratoire Ecologie fonctionnelle et Environnement - EcoLab (Toulouse, France), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Technical University of Berlin / Technische Universität Berlin (TU), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)

Subjects
0106 biological sciences, Biogeochemical cycle, Biodiversité et Ecologie, Biogeochemical processes, Biodiversity, Aquatic ecosystem, Ilex, 010501 environmental sciences, 010603 evolutionary biology, 01 natural sciences, Quercus, Nutrient, Rivers, Water Pollution, Chemical, Animals, Ecosystem, Biomass, 0105 earth and related environmental sciences, Ecosystem health, Multidisciplinary, Ecology, Hydrogeomorphology, Aquatic biodiversity, Eutrophication, 15. Life on land, Invertebrates, 6. Clean water, Europe, Plant Leaves, 13. Climate action, Nutrient pollution, Environmental science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

Reading the Leaves Excess inputs of nutrients—a type of pollution known as eutrophication—threatens biodiversity and water quality in rivers and streams. Woodward et al. (p. 1438 ; see the Perspective by Palmer and Febria ) studied how one key ecosystem process—leaf-litter decomposition—responds to eutrophication across a large nutrient pollution gradient in 100 European streams. Leaf breakdown was stimulated by low to moderate nutrient concentrations but was inhibited at high rates of nutrient loading.

Published
2012
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7. Patterns of denitrification rates in European alluvial soils under various hydrological regimes

Author

Fabrice Bureau, Bruna Gumiero, Lena B. M. Vought, Eric Tabacchi, Olivier Gimenez, Christer Nilsson, A. M. Tabacchi-Planty, Tim Burt, Virgil Iordache, Gilles Pinay, Mariet M. Hefting, V. A. Black, Henri Décamps, Geoffrey E. Petts, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Laboratoire Dynamique de la Biodiversité (LADYBIO), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Utrecht University [Utrecht], Department of Geography, Durham University, Durham University, Umeå University, University of Bucharest (UniBuc), Étude et compréhension de la biodiversité (ECODIV), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Kristianstad University College - HKR (SWEDEN), University of Birmingham [Birmingham], Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Paul-Valéry - Montpellier 3 (UM3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)

Subjects
Denitrification, 010504 meteorology & atmospheric sciences, Floodplain, [SDV]Life Sciences [q-bio], [SDE.MCG]Environmental Sciences/Global Changes, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Context (language use), Soil science, 010501 environmental sciences, Aquatic Science, Silt, 01 natural sciences, Latitude, riparian zone, chemistry.chemical_compound, Nitrate, Water content, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Riparian zone, geography, geography.geographical_feature_category, microbial process, river floodplain, 15. Life on land, Europe, climate change, chemistry, 13. Climate action, Environmental science
Abstract

1. Denitrification in floodplain soils is one of the main biological processes emitting and reducing nitrous oxide, a greenhouse gas, and the main process responsible for the buffering capacity of riparian zones against diffuse nitrate pollution. 2. The aim of this study was to measure denitrification rates under a wide range of current climatic conditions and hydrological regimes in Europe (from latitude 64°N to latitude 42°N and from longitude 2°W to longitude 25°E), in order to determine the response patterns of this microbial process under different climatic and hydrological conditions, and to identify denitrification proxies robust enough to be used at the European scale. 3. Denitrification activity was significant in all the floodplain soils studied whatever the latitude. However, we found an increase in rates of an order of magnitude from high to mid latitudes. Maximum rates (above 30 g N m?2 month?1) were measured in the maritime conditions of the Trent floodplain. These rates are similar to mineralisation rates measured in alluvial soils and of the same order of magnitude as the amount of N stored in herbaceous plants in alluvial soils. 4. We used Multivariate Adaptative Regression Splines to relate the response variable denitrification with five relevant predictors, namely soil moisture, temperature, silt plus clay, nitrate content and herbaceous plant biomass. 5. Soil moisture, temperature, and nitrate were the three main control variables of microbial denitrification in alluvial soils in decreasing order of importance. 6. The model developed for denitrification with interaction effects outperformed a pure additive model. Soil moisture was involved in all interactions, emphasising its importance in predicting denitrification. 7. These results are discussed in the context of scenarios for future change in European hydrological regimes.

Published
2007
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