Suchergebnisse

L'eutrophisation touche de nombreux lacs, réservoirs, rivières et zones côtières, en France et dans le monde. Elle génère des perturbations majeures pour les écosystèmes aquatiques et a des impacts sur les biens et les services associés, sur la santé humaine et sur les activités économiques. Dans certains espaces, elle est devenue une question socialement vive. Les débats sur l'identification des facteurs et des niveaux de risque d'eutrophisation, permettant d'orienter les politiques publiques, ont conduit les ministères en charge de l'environnement et de l'agriculture à confier au CNRS, à l'Ifremer, à l'INRA et à Irstea la réalisation d'une Expertise scientifique collective (ESCo) sur le sujet. Cette ESCo établit un état des lieux critique sur les connaissances scientifiques disponibles au plan international sur les causes, les mécanismes, les conséquences et la prédictibilité des phénomènes d'eutrophisation. Elle identifie les notions considérées comme certaines et celles encore entachées d'incertitudes, les lacunes, les questions faisant l'objet de controverses scientifiques, ainsi que les leviers d'action existants pour endiguer l'eutrophisation.

L'eutrophisation touche de nombreux lacs, réservoirs, rivières et zones côtières, en France et dans le monde. Elle génère des perturbations majeures pour les écosystèmes aquatiques et a des impacts sur les biens et les services associés, sur la santé humaine et sur les activités économiques. Dans certains espaces, elle est devenue une question socialement vive. Les débats sur l'identification des facteurs et des niveaux de risque d'eutrophisation, permettant d'orienter les politiques publiques, ont conduit les ministères en charge de l'environnement et de l'agriculture à confier au CNRS, à l'Ifremer, à l'INRA et à Irstea la réalisation d'une Expertise scientifique collective (ESCo) sur le sujet. Cette ESCo établit un état des lieux critique sur les connaissances scientifiques disponibles au plan international sur les causes, les mécanismes, les conséquences et la prédictibilité des phénomènes d'eutrophisation. Elle identifie les notions considérées comme certaines et celles encore entachées d'incertitudes, les lacunes, les questions faisant l'objet de controverses scientifiques, ainsi que les leviers d'action existants pour endiguer l'eutrophisation.

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HL0DR Times Cited: 0 Cited Reference Count: 73 Kolbe, Tamara de Dreuzy, Jean-Raynald Abbott, Benjamin W. Aquilina, Luc Babey, Tristan Green, Christopher T. Fleckenstein, Jan H. Labasque, Thierry Laverman, Anniet M. Marcais, Jean Peiffer, Stefan Thomas, Zahra Pinay, Gilles Abbott, Benjamin/0000-0001-5861-3481 European Union's Seventh Framework for research, technological development, and demonstration [607150]; European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling" Financial support for this research was provided by the European Union's Seventh Framework for research, technological development, and demonstration under Grant 607150. This paper was supported by the European Union Innovative Training Network "INTERFACES: Ecohydrological interfaces as critical hot spots for transformations of ecosystem exchange fluxes and biogeochemical cycling." 0 3 Natl acad sciences Washington ; International audience ; Biogeochemical reactions occur unevenly in space and time, but this heterogeneity is often simplified as a linear average due to sparse data, especially in subsurface environments where access is limited. For example, little is known about the spatial variability of groundwater denitrification, an important process in removing nitrate originating from agriculture and land use conversion. Information about the rate, arrangement, and extent of denitrification is needed to determine sustainable limits of human activity and to predict recovery time frames. Here, we developed and validated a method for inferring the spatial organization of sequential biogeochemical reactions in an aquifer in France. We applied it to five other aquifers in different geological settings located in the United States and compared results among 44 locations across the six aquifers to assess the generality of reactivity trends. Of the sampling locations, 79% showed pronounced increases of ...

ISI Document Delivery No.: HK8WZ Times Cited: 1 Cited Reference Count: 76 Thomas, Zahra Rousseau-Gueutin, Pauline Abbott, Benjamin W. Kolbe, Tamara Le Lay, Hugo Marcais, Jean Rouault, Francois Petton, Christophe Pichelin, Pascal Le Hennaff, Genevieve Squividant, Herve Labasque, Thierry de Dreuzy, Jean-Raynald Aquilina, Luc Baudry, Jacques Pinay, Gilles French National Research Agency (ANR) [ANR-08-STRA-01]; European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" [607150]; French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages"; LTSER "Zone Atelier Armorique" This research was supported in part by the French National Research Agency (ANR; Project ANR-08-STRA-01) and the European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" (ITN-INTERFACES - FP7-PEOPLE-2013-No. 607150). This research was also supported by the French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages." The study was supported by the LTSER "Zone Atelier Armorique." We thank all the farmers of the ZAAr who kindly accepted the installation of the experiments in their fields. We also thank all the staff of the ILSTER Zone Atelier Armorique, especially the technicians of OSUR-INRA-AGROCAMPUS who helped in sampling and laboratory analysis. 1 0 Springer heidelberg Heidelberg 1436-378x Si ; International audience ; Over the last half century, humans have become the dominant force driving many of Earth's cycles. Intensive agriculture has simultaneously increased nutrient loading of pastoral landscapes and decreased the capacity of these ecosystems to retain or remove excess nutrients. Widespread degradation of terrestrial and aquatic ecosystems has triggered the establishment of ecological observatories, including the Zone ...

ISI Document Delivery No.: HK8WZ Times Cited: 1 Cited Reference Count: 76 Thomas, Zahra Rousseau-Gueutin, Pauline Abbott, Benjamin W. Kolbe, Tamara Le Lay, Hugo Marcais, Jean Rouault, Francois Petton, Christophe Pichelin, Pascal Le Hennaff, Genevieve Squividant, Herve Labasque, Thierry de Dreuzy, Jean-Raynald Aquilina, Luc Baudry, Jacques Pinay, Gilles French National Research Agency (ANR) [ANR-08-STRA-01]; European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" [607150]; French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages"; LTSER "Zone Atelier Armorique" This research was supported in part by the French National Research Agency (ANR; Project ANR-08-STRA-01) and the European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" (ITN-INTERFACES - FP7-PEOPLE-2013-No. 607150). This research was also supported by the French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages." The study was supported by the LTSER "Zone Atelier Armorique." We thank all the farmers of the ZAAr who kindly accepted the installation of the experiments in their fields. We also thank all the staff of the ILSTER Zone Atelier Armorique, especially the technicians of OSUR-INRA-AGROCAMPUS who helped in sampling and laboratory analysis. 1 0 Springer heidelberg Heidelberg 1436-378x Si ; International audience ; Over the last half century, humans have become the dominant force driving many of Earth's cycles. Intensive agriculture has simultaneously increased nutrient loading of pastoral landscapes and decreased the capacity of these ecosystems to retain or remove excess nutrients. Widespread degradation of terrestrial and aquatic ecosystems has triggered the establishment of ecological observatories, including the Zone ...

ISI Document Delivery No.: HK8WZ Times Cited: 1 Cited Reference Count: 76 Thomas, Zahra Rousseau-Gueutin, Pauline Abbott, Benjamin W. Kolbe, Tamara Le Lay, Hugo Marcais, Jean Rouault, Francois Petton, Christophe Pichelin, Pascal Le Hennaff, Genevieve Squividant, Herve Labasque, Thierry de Dreuzy, Jean-Raynald Aquilina, Luc Baudry, Jacques Pinay, Gilles French National Research Agency (ANR) [ANR-08-STRA-01]; European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" [607150]; French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages"; LTSER "Zone Atelier Armorique" This research was supported in part by the French National Research Agency (ANR; Project ANR-08-STRA-01) and the European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" (ITN-INTERFACES - FP7-PEOPLE-2013-No. 607150). This research was also supported by the French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages." The study was supported by the LTSER "Zone Atelier Armorique." We thank all the farmers of the ZAAr who kindly accepted the installation of the experiments in their fields. We also thank all the staff of the ILSTER Zone Atelier Armorique, especially the technicians of OSUR-INRA-AGROCAMPUS who helped in sampling and laboratory analysis. 1 0 Springer heidelberg Heidelberg 1436-378x Si ; International audience ; Over the last half century, humans have become the dominant force driving many of Earth's cycles. Intensive agriculture has simultaneously increased nutrient loading of pastoral landscapes and decreased the capacity of these ecosystems to retain or remove excess nutrients. Widespread degradation of terrestrial and aquatic ecosystems has triggered the establishment of ecological observatories, including the Zone ...

ISI Document Delivery No.: HK8WZ Times Cited: 1 Cited Reference Count: 76 Thomas, Zahra Rousseau-Gueutin, Pauline Abbott, Benjamin W. Kolbe, Tamara Le Lay, Hugo Marcais, Jean Rouault, Francois Petton, Christophe Pichelin, Pascal Le Hennaff, Genevieve Squividant, Herve Labasque, Thierry de Dreuzy, Jean-Raynald Aquilina, Luc Baudry, Jacques Pinay, Gilles French National Research Agency (ANR) [ANR-08-STRA-01]; European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" [607150]; French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages"; LTSER "Zone Atelier Armorique" This research was supported in part by the French National Research Agency (ANR; Project ANR-08-STRA-01) and the European Union Inter-national Training Network "Ecohydrological interfaces as critical hotspots for transformations of ecosystem exchange fluxes and biogeochemical cycling" (ITN-INTERFACES - FP7-PEOPLE-2013-No. 607150). This research was also supported by the French EC2CO grant "Caracterisation hydrologique et biogeochimique de la denitrification dans les paysages." The study was supported by the LTSER "Zone Atelier Armorique." We thank all the farmers of the ZAAr who kindly accepted the installation of the experiments in their fields. We also thank all the staff of the ILSTER Zone Atelier Armorique, especially the technicians of OSUR-INRA-AGROCAMPUS who helped in sampling and laboratory analysis. 1 0 Springer heidelberg Heidelberg 1436-378x Si ; International audience ; Over the last half century, humans have become the dominant force driving many of Earth's cycles. Intensive agriculture has simultaneously increased nutrient loading of pastoral landscapes and decreased the capacity of these ecosystems to retain or remove excess nutrients. Widespread degradation of terrestrial and aquatic ecosystems has triggered the establishment of ecological observatories, including the Zone ...