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1. Hydrogen and the Decarbonization of the Energy System in Europe in 2050 : A Detailed Model-Based Analysis

Author

Gondia S. Seck, Emmanuel Hache, Jerome Sabathier, Fernanda Guedes, Gunhild A. Reigstad, Julian Straus, Ove Wolfgang, Jabir A. Ouassou, Magnus Askeland, Ida Hjorth, Hans I. Skjelbred, Leif E. Andersson, Sebastien Douguet, Manuel Villavicencio, Johannes Trüby, Johannes Brauer, Clement Cabot, IFP Energies nouvelles (IFPEN), EconomiX, Université Paris Nanterre (UPN)-Centre National de la Recherche Scientifique (CNRS), SINTEF Energy Research, Deloitte Consulting [Diegem], and This study received the financial support of the International Association of Oil & Gas Producers, BP Europa SE, ConocoPhillips (U.K.) Holdings Limited, ENI S.p.A., Equinor Energy Belgium, Ervia, European Petroleum Refiners Association Concawe Division, ExxonMobil International Ltd, Gassco AS, Hydrogen Europe, Norsk Olje og Gass, OMV Refining & Marketing GmbH, Shell International Exploration and Production BV, Snam S.P.A., Total SA, Wintershall Dea GmbH and Zukunft Gas e.V.. This paper is part of the Hydrogen for Europe (Hydrogen4EU) project. The views expressed herein are strictly those of the authors and are not to be construed as representing those of the funding partners. The authors are very grateful to Florence Delprat-Jannaud, François Kalaydjian, Louis-Marie Malbec, Charlène Barnet from IFPEN, Marte Fodstad, Mona Mølnvik and Brage R. Knudsen from SINTEF, Antoine Gery, Clément Cartry and Charline Moreux from DELOITTE for their insightful comments and suggestions. Any remaining errors are ours.

Subjects
[SDV.EE]Life Sciences [q-bio]/Ecology, environment, Learning-by-doing model, Hydrogen import model, Renewable Energy, Sustainability and the Environment, European green deal, [SDE.IE]Environmental Sciences/Environmental Engineering, [SDE]Environmental Sciences, HydrogenBottom up model, Carbon neutrality
Abstract

International audience; The paper aims to address the potential of low-carbon and renewable hydrogen in decarbonizing the European energy system; specifically, reducing emissions by 55% in 2030 compared to 1990, and targeting net-zero emissions by 2050. The methodology relies on a cost-optimization modelling approach using three models complementarily: a detailed European TIMES-type model (MIRET-EU); an aggregated model for the European energy system, allowing endogenous cost reductions based on technology deployment in a dynamic programming formulation for investment strategies (Integrate Europe); and a dedicated model for assessing hydrogen import options for Europe (HyPE). Two policy-relevant scenarios have been developed: Technology Diversification (TD) and Renewable Push (RP). Both lead to climate neutrality in Europe in 2050 but the RP scenario differs by setting new reinforced targets for renewable technologies in Europe. Results show that hydrogen production would increase sharply in the coming decades, exceeding 30 million tons (Mt) by 2030 and more than 100 Mt by 2050 in both scenarios. Polyvalence of hydrogen in decarbonizing the European energy system for certain hard-to-abate energy uses in transport and industry is also observed. European hydrogen production relies on a diverse mix including both renewable and low-carbon technologies. It is complemented by hydrogen imports from neighboring regions, that represent between 10 and 15% of total demand in 2050. Access to existing cross-border pipelines is a critical advantage compared to maritime transport. Notably, there are considerable cost reductions due to technology deployment for solar power and hydrogen production by electrolyzers.

Published
2022

2. Halving food-related greenhouse gas emissions can be achieved by redistributing meat consumption: progressive optimization Results of the NutriNet-Santé cohort

Author

Julia Baudry, Denis Lairon, Alison Dussiot, Philippe Pointereau, Brigitte Langevin, Benjamin Allès, Pauline Rebouillat, Emmanuelle Kesse-Guyot, Mathilde Touvier, Joséphine Brunin, Serge Hercberg, François Mariotti, Hélène Fouillet, Equipe 3: EREN- Equipe de Recherche en Epidémiologie Nutritionnelle (CRESS - U1153), Université Sorbonne Paris Nord-Centre de Recherche Épidémiologie et Statistique Sorbonne Paris Cité (CRESS (U1153 / UMR_A_1125 / UMR_S_1153)), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Physiologie de la Nutrition et du Comportement Alimentaire (PNCA (UMR 0914)), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), SOLAGRO, Solagro, Agence de l'Environnement et de la Maîtrise de l'Energie (ADEME), Centre recherche en CardioVasculaire et Nutrition = Center for CardioVascular and Nutrition research (C2VN), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Université Sorbonne Paris Cité (USPC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Association Solagro (Solagro), The NutriNet-Sante study is funded by FrenchMinistry of Health and Social Affairs, Sante Publique France, Institut National de la Sante et de la Recherche Medicale, Institut National de la Recherche Agronomique, Conservatoire National des Arts et Metiers, and Sorbonne Paris Nord University. The BioNutriNet project was supported by the French National Research Agency (Agence Nationale de la Recherche) in the context of the 2013 Programme de Recherche Systemes Alimentaires Durables (ANR-13-ALID-0001). The funders had no role in the study design, data collection, analysis, interpretation of data, preparation of the manuscript, and decision to submit the paper., ANR-13-ALID-0001,BioNutriNet,Consommation d'aliments issus de l'agriculture biologique: déterminants et motivation vis-à-vis de la durabilité, impact nutritionnel, économique, environnemental et toxicologique(2013), Kesse-guyot, Emmanuelle, and Systèmes Alimentaires Durables - Consommation d'aliments issus de l'agriculture biologique: déterminants et motivation vis-à-vis de la durabilité, impact nutritionnel, économique, environnemental et toxicologique - - BioNutriNet2013 - ANR-13-ALID-0001 - ALID - VALID

Subjects
Adult, Male, Meat, Environmental Engineering, 010504 meteorology & atmospheric sciences, Animal food, 010501 environmental sciences, 01 natural sciences, Food Supply, Nutrition Policy, Greenhouse Gases, Nutrient, Animal science, Ruminant, Animals, Humans, Environmental Chemistry, Waste Management and Disposal, Aged, 0105 earth and related environmental sciences, 2. Zero hunger, Consumption (economics), [SDV.EE]Life Sciences [q-bio]/Ecology, environment, biology, business.industry, Intensive farming, greenhouse gas emissions, Middle Aged, biology.organism_classification, co-product tradeoffs, Pollution, Diet, [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition, [SDV.EE] Life Sciences [q-bio]/Ecology, environment, diet sustainability, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, 13. Climate action, Greenhouse gas, Cohort, Food processing, Environmental science, Female, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, optimization modelling, Energy Intake, business, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition
Abstract

Background Diet-related greenhouse gas emissions (GHGe) mainly comes from animal-sourced foods. As progressive changes are more acceptable for a sustainable food transition, we aimed to identify nutritionally adequate and culturally acceptable optimized diets ensuring a gradual reduction in GHGe, using observed diet from a large sample of French adults, while considering the mode of food production (organic vs conventional farming) and the co-production link between milk and beef. Material and method Based on the consumption of 257 organic and conventional foods among 29,413 participants (75% women, age: 53.5 ± 14.0y) of the NutriNet-Sante study, we modelled optimal diets according to GHGe reduction scenarios in 5% steps, from 0 to 50% with nutritional, acceptability, and coproduct constraints, for men, premenopausal and menopausal women separately. Results Gradual GHGe decrease under these constraints led to optimal diets with an overall decrease in animal foods, with marked reductions in dairy products (up to −83%), together with a stable but largely redistributed meat consumption in favor of poultry (up to +182%) and pork (up to +46%) and at the expense of ruminant meat (down to −92%). Amounts of legumes increases dramatically (up to +238%). The greater the reduction in diet-related GHGe, the lower the cumulative energy demand (about −25%) and land use (about −43%). The proportion of organic food increased from ~30% in the observed diets to ~70% in the optimized diets. Conclusion Our results suggest that meeting both nutrient reference value and environmental objectives of up to 50% GHGe reduction requires the reduction of animal foods together with important substitutions between animal food groups, which result in drastic reductions in beef and dairy products. Further research is required to explore alignment with long-term health value and conflict with acceptability, in particular for even greater GHGe reductions.

Published
2021

3. Accounting for competition in multi-environment tree genetic evaluations: a case study with hybrid pines

Author

Nuno Borralho, Eduardo P. Cappa, Ector Belaber, Maria Elena Gauchat, Cristian Damián Schoffen, Facundo Muñoz, Leopoldo Sanchez, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Animal, Santé, Territoires, Risques et Ecosystèmes (UMR ASTRE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), RAIZ – Forestry & Paper Research Institut, Instituto Superior Técnico, Universidade Técnica de Lisboa, Biologie intégrée pour la valorisation de la diversité des Arbres et de la Forêt (BioForA), Office National des Forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and This study was funded by the National Institute of Agricultural Technology (INTA) (grant numbers PNFOR-01104062, MSNES-1242204/5). E.P.C.’s research was partially supported by the National Agency for the Promotion of Science and Technology of Argentina (ANPCYT, PICT-2016 1048). F.M.’s research is partially supported by research grant MTM2016-77501-P from the State Research Agency of the Spanish Ministry of Science, Innovation and Universities jointly with the European Regional Development Fund, FEDER.

Subjects
Additive and competition genotype–environment interaction, 0106 biological sciences, Mixed model, [SDV]Life Sciences [q-bio], media_common.quotation_subject, Accounting, Tree breeding, 010603 evolutionary biology, 01 natural sciences, Genetic correlation, Competition (biology), Competition model, Genetic variation, Gene–environment interaction, media_common, Mathematics, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Ecology, business.industry, Diameter at breast height, Forestry, 15. Life on land, Total heritable variance, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, business, 010606 plant biology & botany
Abstract

International audience; Key message: A novel multi-environment competition individual-tree mixed model resulted in better fit, and greater individual narrow- and broad-sense heritabilities than the model without competition, notably for traits showing competition. In multi-environment tests, the proposed model would allow tree breeders to select genotypes with the best performance in both additive direct and competition breeding values, increasing forest productivity. Context: Genetic merit of trees is known to be affected and interact with local competition effects as well as changes across environmental conditions. Recent studies showed that competition genetic effects can affect the genetic variance and bias the tree breeding values, and its covariance with direct breeding values has been variable across traits. Aims: The present paper extends a mixed-model methodology to the problem of accounting for competition in a multi-environment set of forest genetic trials and exploring its impact on genetic variances as well as the multi-environment genetic correlation. Methods: The proposed model is illustrated using data from two full-sib trials of Pinus elliottii var. elliottii × Pinus caribaea var. hondurensis F1. Dispersion parameters and (co)variance of total breeding values were estimated for diameter at breast height, total tree height, and stem straightness at age 10. Results: For traits showing competition effects (diameter at breast height and total tree height), the proposed multi-environment competition model gave better fit than the simpler model. Accounting for competition increased the direct additive variance, reduced the residual variances, and did not change significantly the across-site additive genetic correlation. However, for diameter at breast height, top 5% best genetic rankings showed differences. Conclusion: When traits are strongly affected by inter-tree competition, the use of the proposed model in multi-environment analyses can efficiently identify the phenomenon with general benefits in the fitting of genetic components and open the door to select on the basis of competitiveness.

Published
2021

4. Les émissions de N2O peuvent-elles compenser les avantages du stockage du carbone organique dans le sol ?

Author

David S. Powlson, Frédéric Rees, Victoria Naipal, Jérôme Balesdent, Rémi Cardinael, Julien Fouché, Emanuele Lugato, Elisa Bruni, Stefan Frank, Philippe Ciais, Dominique Arrouays, Catherine Hénault, Benoit Gabrielle, Hanqin Tian, Thomas Nesme, Sylvain Pellerin, Hugo Valin, Bertrand Guenet, Jean-Pierre Caliman, Michael Obersteiner, Claire Chenu, Feng Zhou, Yang Su, Jean-François Soussana, Dominique Desbois, Songchao Chen, Daniel P. Rasse, Martial Bernoux, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Modélisation des Surfaces et Interfaces Continentales (MOSAIC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), InfoSol (InfoSol), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Food and Agriculture Organization of the United Nations [Rome, Italie] (FAO), Smart Research Institute [Indonésie] (SMARTRI), SMART agribusiness and food [Jakarta] (SMART), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Agroécologie et Intensification Durables des cultures annuelles (UPR AIDA), University of Zimbawe [Harare] (UZ), University of Zimbawe, ICOS-ATC (ICOS-ATC), Economie Publique (ECO-PUB), Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème (UMR LISAH), Institut de Recherche pour le Développement (IRD)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-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), International Institute for Applied Systems Analysis [Laxenburg] (IIASA), Agroécologie [Dijon], Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), European Commission - Joint Research Centre [Ispra] (JRC), Interactions Sol Plante Atmosphère (UMR ISPA), Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Rothamsted Research, Norwegian Institute of Bioeconomy Research (NIBIO), Auburn University (AU), Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University [Beijing], This paper stemmed from a workshop 'Emerging challenges in large scale soil carbon sequestration' held in Paris on 8-10 October 2018. The workshop was financially supported by the French government under the ANR 'Investissements d'avenir' program with the reference CLAND ANR-16-CONV-0003. F.Z. acknowledges support from the National Natural Science Foundation of China (grant no. 41671464), ANR-16-CONV-0003,CLAND,CLAND : Changement climatique et usage des terres(2016), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - 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), Biotechnology and Biological Sciences Research Council (BBSRC), Norsk institutt for bioøkonomi=Norwegian Institute of Bioeconomy Research (NIBIO), Support from the National Natural Science Foundation of China (grant no. 41671464), Institut de Recherche pour le Développement (IRD)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Territoires, Environnement, Télédétection et Information Spatiale (UMR TETIS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre d'études spatiales de la biosphère (CESBIO), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-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), Environnement Méditerranéen et Modélisation des Agro-Hydrosystèmes (EMMAH), Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Centre National d'Études Spatiales [Toulouse] (CNES)

Subjects
0106 biological sciences, Atténuation de l'effet de serre, 010504 meteorology & atmospheric sciences, Travail du sol, [SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/Agronomy, greenhouse gases emissions, Agroforesterie, Carbone dans le sol, 7. Clean energy, 01 natural sciences, agroforestry, Interactions biologiques, Environmental protection, Biochar, organic amendment, General Environmental Science, 2. Zero hunger, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Global and Planetary Change, Ecology, greenhouse gas emissions, land based mitigation, erosion, [SHS.ECO]Humanities and Social Sciences/Economics and Finance, Tillage, Gaz a effet de serre, séquestration du carbone, Cycle de l'azote, réduction des émissions, [SDE]Environmental Sciences, tillage, Culture de couverture, P33 - Chimie et physique du sol, Labour, Land management, Climate change, érosion, [SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study, 010603 evolutionary biology, 12. Responsible consumption, Matière organique du sol, Fertilité du sol, Environmental Chemistry, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, biochar, Occupation des sols, émissions de gaz à effet de serre, 0105 earth and related environmental sciences, cover crops agroforestry, Oxyde nitreux, Global warming, Soil carbon, 15. Life on land, soil organic carbon, land-based mitigation, Amendement organique, 13. Climate action, Greenhouse gas, Soil water, Environmental science, cover crops, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Cycle du carbone
Abstract

This paper stemmed from a workshop 'Emerging challenges in large scale soil carbon sequestration' held in Paris on 8-10 October 2018; International audience; To respect the Paris agreement targeting a limitation of global warming below 2°C by 2100, and possibly below 1.5°C, drastic reductions of greenhouse gas emissions are mandatory but not sufficient. Large‐scale deployment of other climate mitigation strategies are also necessary. Among these, increasing soil organic carbon (SOC) stocks is an important lever because carbon in soils can be stored for long periods and land management options to achieve this already exist and have been widely tested. However, agricultural soils are also an important source of nitrous oxide (N$_2$O), a powerful greenhouse gas, and increasing SOC may influence N$_2$O emissions, likely causing an increase in many cases, thus tending to offset the climate change benefit from increased SOC storage. Here, we review the main agricultural management options for increasing SOC stocks. We evaluate the amount of SOC that can be stored as well as resulting changes in N$_2$O emissions to better estimate the climate benefits of these management options. Based on quantitative data obtained from published meta‐analyses and from our current level of understanding, we conclude that the climate mitigation induced by increased SOC storage is generally overestimated if associated N$_2$O emissions are not considered but, with the exception of reduced tillage, is never fully offset. Some options (e.g, biochar or non‐pyrogenic C amendment application) may even decrease N$_2$O emissions.; Pour respecter l'accord de Paris visant à limiter le réchauffement climatique à moins de 2°C d'ici 2100, et éventuellement à moins de 1,5°C, des réductions drastiques des émissions de gaz à effet de serre sont obligatoires mais pas suffisantes. Le déploiement à grande échelle d'autres stratégies d'atténuation du climat est également nécessaire. Parmi celles-ci, l'augmentation des stocks de carbone organique du sol (SOC) est un levier important car le carbone dans les sols peut être stocké pendant de longues périodes et les options de gestion des terres pour y parvenir existent déjà et ont été largement testées. Toutefois, les sols agricoles sont également une source importante d'oxyde nitreux (N$_2$O), un puissant gaz à effet de serre, et l'augmentation du SOC peut influer sur les émissions de N$_$O, provoquant probablement une augmentation dans de nombreux cas, tendant ainsi à compenser le bénéfice du changement climatique résultant du stockage accru du SOC. Nous passons ici en revue les principales options de gestion agricole pour l'augmentation des stocks de SOC. Nous évaluons la quantité de SOC qui peut être stockée ainsi que les changements qui en résultent dans les émissions de N$_2$O afin de mieux estimer les avantages climatiques de ces options de gestion. Sur la base des données quantitatives obtenues à partir de méta-analyses publiées et de notre niveau de compréhension actuel, nous concluons que l'atténuation du climat induite par un stockage accru du SOC est généralement surestimée si l'on ne tient pas compte des émissions de N$_2$O associées, mais, à l'exception du travail réduit du sol, n'est jamais totalement compensée. Certaines options (par exemple, le biochar ou l'application d'un amendement C non pyrogène) peuvent même réduire les émissions de N$_2$O.

Published
2021

5. Influence of past and future climate changes on the distribution of three Southeast Asian murine rodents

Author

Serge Morand, Christine N. Meynard, Johan Michaux, Vincent Herbreteau, Alice Latinne, Surachit Waengsothorn, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Institut de Botanique, Université de Liège, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), UMR 228 Espace-Dev, Espace pour le développement, Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Université de Guyane (UG)-Université des Antilles (UA), Thailand Institute of Scientific and Technological Research (TISTR), Thailand Institute of Scientific and Technological Research, Animal et gestion intégrée des risques (UPR AGIRs), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), This work was supported by a Belgian FRS-FNRS fellowship to A.L. (mandat ‘aspirant’) and to J.R.M. (mandat ‘Ma^ıtre de recherches’) and financial grants from the Belgian FRS-FNRS [‘credits pour brefs sejours a l’etranger’ to A.L. and J.R.M. and credits from the ‘Fonds de la Recherche Fondamentale Collective (FRFC)’ to J.R.M.], the University of Li ege and the Communaute franc aise de Belgique. A.L. was funded by a Marie Curie COFUND postdoctoral fellowship when writing this paper. This study is part of the ‘CERoPath project’, ANR Biodiversity ANR07 BDIV012, and the ‘BiodivHealthSEA project’, ANR CP&ES11 CPEL002, funded by the French National Agency for Research. Th, ANR-07-BDIV-0012,CEROPATH,Ecologie des communautés rongeurs - pathogènes en Asie du Sud-Est : effets des changements de biodiversité et implications pour l'écologie de la santé(2007), ANR-11-CEPL-0002,BiodivHealthSEA,Impacts et perceptions locales des changements globaux : santé, biodiversité et zoonoses en Asie du Sud-Est(2011), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Université de Guyane (UG)-Université des Antilles (UA)-Institut de Recherche pour le Développement (IRD)-Université de Perpignan Via Domitia (UPVD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Université des Antilles (UA)-Université de Guyane (UG)-Université de Montpellier (UM)-Université de La Réunion (UR)-Avignon Université (AU)-Université de Perpignan Via Domitia (UPVD)-Institut de Recherche pour le Développement (IRD), Animal et gestion intégrée des risques (Cirad-Bios-UPR 22 AGIRs), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), ANR-07-BDIV-0012,BDIV,Ecologie des communautés rongeurs - pathogènes en Asie du Sud-Est : effets des changements de biodiversité et implications pour l'écologie de la santé(2007), and 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)

Subjects
0106 biological sciences, 01 natural sciences, Species distribution modelling, Dynamique des populations, Climate change, Leopoldamys sabanus, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, 0303 health sciences, Ecology, biology, Last Glacial Maximum, [SHS.GEO]Humanities and Social Sciences/Geography, Southeast Asia, Pleistocene, Geography, rodents, Interglacial, L20 - Écologie animale, Leopoldamys neilli, P40 - Météorologie et climatologie, Distribution géographique, Évaluation du risque, Froid, Southeast asian, 010603 evolutionary biology, Last Interglacial, Rodents, modelling, 03 medical and health sciences, Leopoldamys, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, Changement climatique, L60 - Taxonomie et géographie animales, Modèle de simulation, 15. Life on land, biology.organism_classification, Environmental niche modelling, 13. Climate action, Écologie animale, species distribution, Rongeur, Murinae, [SDE.BE]Environmental Sciences/Biodiversity and Ecology
Abstract

International audience; Aim We tested the influence of Pleistocene climatic fluctuations and the potential effect of future climate change on Southeast Asian small mammal dis- tributions using two forest-dwelling (Leopoldamys herberti and Leopoldamys sabanus) and one karst (Leopoldamys neilli) endemic rodent species as models.Location Southeast Asia.Methods We used presence–absence data of genetically identified individuals, bioclimatic variables and species distribution modelling techniques to predict potential distributions of the three studied species under current, past [Last Interglacial (LIG) and Last Glacial Maximum (LGM)] and future conditions. We applied a variety of modelling techniques and then used consensus tech- niques to draw up robust maps of potential distribution ranges at all stages.Results According to our models, these three Leopoldamys species did not experience significant range contraction during the LGM. Our models revealed substantial range contraction during the LIG for L. herberti in northern Indo- china, while its distribution expanded in southern Indochina. Evidence of a southward range expansion during that period was also obtained for L. neilli, whereas L. sabanus remained widely distributed in insular Southeast Asia but experienced a range contraction on the Thai-Malay Peninsula. The two future climate change scenarios used predicted that large climatically suitable areas would still be available in the future for the three species.Main conclusions Our model predictions contradict the well-established hypothesis that Southeast Asian forest-dwelling species were confined to small refugia during the LGM. Moreover, our results suggest that some Southeast Asian taxa may have been distributed in their refugial state during the LIG rather than the LGM. This could be because of vegetation changes that may have occurred at that time as a result of the increased seasonality observed dur- ing the LIG. These Pleistocene refugia may have been localized in northern Indochina but our study also revealed that southern Indochina could provide major potential refugia.

Published
2015

6. Functional specialization of Eucalyptus fine roots: contrasting potential uptake rates for nitrogen, potassium and calcium tracers at varying soil depths

Author

da Silva, Eduardo Vinicius, Bouillet, Jean-Pierre, Gonçalves, José Leonardo de Moraes, Abreu, Cassio Hamilton, Hinsinger, Philippe, Jourdan, Christophe, Nouvellon, Yann, Stape, Jose Luiz, Laclau, Jean-Paul, Universidade de São Paulo (USP), Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-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), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Centro de Energia Nuclear na Agricultura (CENA ), University of São Paulo (USP), Université Joseph Ki-Zerbo [Ouagadougou] (UJZK), Department of Forestry and Environmental Resources, North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC)-University of North Carolina System (UNC), Cnpq (478100/2008-6), Capes, Cirad, Eucflux, ArcelorMittal, Cenibra, Copener, Duratex, Fibria, International Paper, Klabin Suzano, and VM Florestal

Subjects
Eucalyptus grandis, (15)N, (15) N, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, rubidium, deep root system, soil depth, profondeur du sol, tropical soil, strontium, système racinaire profond, nutrient uptake potential, absorption des nutriments
Abstract

International audience; 1. Little is known about the role of deep roots in the nutrition of forest trees and their ability to provide a safety-net service taking up nutrients leached from the topsoil. 2. To address this issue, we studied the potential uptake of N, K and Ca by Eucalyptus grandis trees (6 years of age - 25 m mean height), in Brazil, as a function of soil depth, texture and water content. We injected NO(3)(-)- (15)N, Rb(+) (analogue of K(+)) and Sr(2+) (analogue of Ca(2+)) tracers simultaneously in a solution through plastic tubes at 10, 50, 150 and 300 cm in depth in a sandy and a clayey Ferralsol soil. A complete randomized design was set up with three replicates of paired trees per injection depth and soil type. Recently expanded leaves were sampled at various times after tracer injection in the summer, and the experiment was repeated in the winter. Soil water contents were continuously monitored at the different depths in the two soils. 3. Determination of foliar Rb and Sr concentrations and (15)N atom % made it possible to estimate the relative uptake potential (RUP) of tracer injections from the four soil depths and the specific RUP (SRUP), defined as RUP, per unit of fine root length density in the corresponding soil layer. 4. The highest tracer uptake rates were found in the topsoil, but contrasting RUP distributions were observed for the three tracers. Whilst the RUP was higher for NO(3)(-)- (15)N than for Rb(+) and Sr(2+) in the upper 50 cm of soil, the highest SRUP values for Sr(2+) and Rb(+) were found at a depth of 300 cm in the sandy soil, as well as in the clayey soil when gravitational solutions reached that depth. 5. Our results suggest that the fine roots of E. grandis trees exhibit contrasting potential uptake rates with depth depending on the nutrient. This functional specialization of roots might contribute to the high growth rates of E. grandis trees, efficiently providing the large amounts of nutrients required throughout the development of these fast-growing plantations.

Published
2011