107 results on '"Gallet-Budynek A"'
Search Results
2. LIBS et XRF : deux techniques pour la mesure rapide des éléments nutritifs dans les sols
- Author
-
Pierre Masson, Anne Gallet-Budynek, and Julian Guezenoc
- Subjects
Agriculture (General) ,S1-972 ,Plant culture ,SB1-1110 - Abstract
L’émergence de dispositifs analytiques portables tels que la spectrométrie de fluorescence des rayons X et la spectrométrie sur plasma induit par laser, permet de disposer d’outils pratiques et rapides pour réaliser des mesures élémentaires directement sur les sols, sans préparation préalable des échantillons. Leur utilisation peut être envisagée pour cartographier une parcelle, pour fournir des indicateurs en temps réel des potentialités d’un sol mais aussi pour suivre ces performances dans le temps en fonction d’un changement de contexte.
- Published
- 2020
- Full Text
- View/download PDF
3. Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long‐term enhancement of forest productivity under elevated CO2
- Author
-
Drake, John E, Gallet‐Budynek, Anne, Hofmockel, Kirsten S, Bernhardt, Emily S, Billings, Sharon A, Jackson, Robert B, Johnsen, Kurt S, Lichter, John, McCarthy, Heather R, McCormack, M Luke, Moore, David JP, Oren, Ram, Palmroth, Sari, Phillips, Richard P, Pippen, Jeffrey S, Pritchard, Seth G, Treseder, Kathleen K, Schlesinger, William H, DeLucia, Evan H, and Finzi, Adrien C
- Subjects
Climate Action ,Biomass ,Carbon ,Carbon Cycle ,Carbon Dioxide ,Climate ,Ecosystem ,Nitrogen ,Nitrogen Cycle ,North Carolina ,Plant Roots ,Soil Microbiology ,Trees ,Carbon sequestration ,coupled biogeochemical cycles ,coupled climate-carbon cycle models ,elevated CO2 ,forest productivity ,nitrogen ,Ecological Applications ,Ecology ,Evolutionary Biology - Abstract
The earth's future climate state is highly dependent upon changes in terrestrial C storage in response to rising concentrations of atmospheric CO₂. Here we show that consistently enhanced rates of net primary production (NPP) are sustained by a C-cascade through the root-microbe-soil system; increases in the flux of C belowground under elevated CO₂ stimulated microbial activity, accelerated the rate of soil organic matter decomposition and stimulated tree uptake of N bound to this SOM. This process set into motion a positive feedback maintaining greater C gain under elevated CO₂ as a result of increases in canopy N content and higher photosynthetic N-use efficiency. The ecosystem-level consequence of the enhanced requirement for N and the exchange of plant C for N belowground is the dominance of C storage in tree biomass but the preclusion of a large C sink in the soil.
- Published
- 2011
4. Future challenges in coupled C–N–P cycle models for terrestrial ecosystems under global change : a review
- Author
-
Achat, David L., Augusto, Laurent, Gallet-Budynek, Anne, and Loustau, Denis
- Published
- 2016
5. Variables selection: A critical issue for quantitative laser-induced breakdown spectroscopy
- Author
-
Guezenoc, Julian, Bassel, Léna, Gallet-Budynek, Anne, and Bousquet, Bruno
- Published
- 2017
- Full Text
- View/download PDF
6. Drying-induced changes in phosphorus status of soils with contrasting soil organic matter contents – Implications for laboratory approaches
- Author
-
Achat, David L., Augusto, Laurent, Gallet-Budynek, Anne, and Bakker, Mark R.
- Published
- 2012
- Full Text
- View/download PDF
7. Re-Assessment of Plant Carbon Dynamics at the Duke Free-Air CO₂ Enrichment Site: Interactions of Atmospheric [CO₂] with Nitrogen and Water Availability over Stand Development
- Author
-
McCarthy, Heather R., Oren, Ram, Johnsen, Kurt H., Gallet-Budynek, Anne, Pritchard, Seth G., Cook, Charles W., LaDeau, Shannon L., Jackson, Robert B., and Finzi, Adrien C.
- Published
- 2010
- Full Text
- View/download PDF
8. Intact Amino Acid Uptake by Northern Hardwood and Conifer Trees
- Author
-
Gallet-Budynek, Anne, Brzostek, Edward, Rodgers, Vikki L., Talbot, Jennifer M., Hyzy, Sharon, and Finzi, Adrien C.
- Published
- 2009
- Full Text
- View/download PDF
9. Increases in Nitrogen Uptake Rather than Nitrogen-Use Efficiency Support Higher Rates of Temperate Forest Productivity under Elevated CO²
- Author
-
Finzi, Adrien C., Norby, Richard J., Calfapietra, Carlo, Gallet-Budynek, Anne, Gielen, Birgit, Holmes, William E., Hoosbeek, Marcel R., Iversen, Colleen M., Jackson, Robert B., Kubiske, Mark E., Ledford, Joanne, Liberloo, Marion, Oren, Ram, Polle, Andrea, Pritchard, Seth, Zak, Donald R., Schlesinger, William H., and Ceulemans, Reinhart
- Published
- 2007
- Full Text
- View/download PDF
10. LIBS et XRF : deux techniques pour la mesure rapide des éléments nutritifs dans les sols
- Author
-
Anne Gallet-Budynek, Pierre Masson, and Julian Guezenoc
- Subjects
lcsh:SB1-1110 ,lcsh:Agriculture (General) ,lcsh:Plant culture ,lcsh:S1-972 - Abstract
L’émergence de dispositifs analytiques portables tels que la spectrométrie de fluorescence des rayons X et la spectrométrie sur plasma induit par laser, permet de disposer d’outils pratiques et rapides pour réaliser des mesures élémentaires directement sur les sols, sans préparation préalable des échantillons. Leur utilisation peut être envisagée pour cartographier une parcelle, pour fournir des indicateurs en temps réel des potentialités d’un sol mais aussi pour suivre ces performances dans le temps en fonction d’un changement de contexte.
- Published
- 2020
11. Laser-Induced Breakdown Spectroscopy: a groundbreaking technique for the sustainable production of agricultural resources
- Author
-
Guézénoc, Julian, Gallet-Budynek, Anne, Bousquet, Bruno, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), American Geophysical Union (AGU). USA., and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
12. LIBS et XRF : deux techniques pour la mesure rapide des éléments nutritifs dans les sols
- Author
-
Masson, Pierre, primary, Gallet-Budynek, Anne, additional, and Guezenoc, Julian, additional
- Published
- 2020
- Full Text
- View/download PDF
13. Variable selection in laser-induced breakdown spectroscopy assisted by multivariate analysis: An alternative to multi-peak fitting
- Author
-
Guezenoc, Julian, Payré, Valérie, Fabre, Cécile, Syvilay, Delphine, Cousin, Agnes, Gallet-Budynek, Anne, and Bousquet, Bruno
- Published
- 2019
- Full Text
- View/download PDF
14. Critical review on the use of normalization in LIBS
- Author
-
Bousquet, Bruno, Guézénoc, Julian, Gallet-Budynek, Anne, Centre National de la Recherche Scientifique (CNRS), Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
15. Experimental design: A helpful tool before LIBS on-site analyses of agricultural soils
- Author
-
Bousquet, Bruno, Guézénoc, Julian, Gallet-Budynek, Anne, Centre National de la Recherche Scientifique (CNRS), Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2019
16. Evaluation of portable LIBS and portable XRF in the frame of multi-elemental analysis of agricultural soils and plants
- Author
-
Bruno Bousquet, Julian Guézénoc, Anne Gallet-Budynek, Etonam Tété Kondo, Thomas Guzman, Alain Mollier, Pierre Masson, Hugues Roussarie, Martine Peypelut, Thierry Dalix, Guillaume Daugey, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Unité de service et de recherches en analyses végétales et environnementales (USRAVE), Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience; Introduction Agronomic research has a growing interest in collecting faster, cheaper and still efficient information about agricultural matrices in order to achieve a better monitoring of soil quality and fertility1. Laser-induced breakdown spectroscopy (LIBS) and X-Ray fluorescence spectrometry (XRF) have been identified as high potential techniques for on-site multi-elemental analysis of agronomic matrices such as plants2 and soils3. Materials and Methods The study of agricultural soils and plants, more precisely the multi-elemental quantification of several chemical elements of interest (P, Mg, Fe, Al, Ca, K…), was realized using portable LIBS (Z300 – SCIAPS) and portable XRF (S1 TITAN 800 – Bruker) systems. 62 soil samples and 40 plant samples have been prepared as pressed pellets. Multivariate calibrations have been achieved for quantitative analysis of the LIBS spectra. Both XRF and LIBS quantitative analysis were compared to the concentration values determinate by ICP OES. Results and Discussion Good practices related to sample preparation and experimental conditions to achieve relevant LIBS/XRF measurements in laboratory will be discussed. For both LIBS and XRF measurements, the influence of environmental parameters has been examined in order to assess the robustness of on-site analysis. Finally, a first campaign of on-site LIBS and XRF analyses on agricultural soils and plants has been performed. Conclusion The evaluation in the laboratory of two portable instruments, LIBS and XRF, on soils and plant samples, have revealed that these two techniques are very sensitive to moisture. The results of the field measurements on wheat leaves and soil will be presented and discussed.
- Published
- 2019
17. Critical review and advices on spectral-based normalization methods for LIBS quantitative analysis
- Author
-
Bruno Bousquet, Julian Guezenoc, Anne Gallet-Budynek, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), and Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
010302 applied physics ,Normalization (statistics) ,good practices ,LIBS ,Computer science ,assessment ,[SDV]Life Sciences [q-bio] ,010401 analytical chemistry ,Standard normal variate ,computer.software_genre ,01 natural sciences ,figures of merit ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Analytical Chemistry ,normalization ,Square error ,0103 physical sciences ,[SDE]Environmental Sciences ,Figure of merit ,Data mining ,Instrumentation ,computer ,Spectroscopy - Abstract
International audience; As it is the case for any spectroscopic technique, laser-induced breakdown spectroscopy (LIBS) is strongly influenced by the signal fluctuations, and the LIBS spectra need to be normalized to obtain enhanced analytical performance. Nowadays, normalization in LIBS remains an open question and, in the present review, the normalization methods commonly applied to LIBS are presented and discussed, in particular those based on background, total area, internal standard, and Standard Normal Variate. We emphasize that the figures of merit, namely the coefficient of determination, the root-mean square error of prediction and the limit of quantification used to assess the advantages of processing normalized instead of non-normalized LIBS spectra, in a context of quantification, must be calculated in a rigorous way to be able to draw conclusions. We thus propose advices and good practices to achieve a rigorous comparison between quantitative models involving various normalization approaches, the final choice of the best normalization being ultimately driven by the analytical context. In order to take the best advantage from normalization in LIBS and thus increase the analytical performance of this technique, we encourage the analyst to thoroughly compare different normalization methods.
- Published
- 2019
18. Multi-elemental soils analysis: Variable selection in laser-induced breakdown spectroscopy assisted by multivariate analysis: An alternative to multi-peak fitting
- Author
-
Bousquet, Bruno, Guézénoc, Julian, Payré, Bruno, Fabre, C., Syvilay, Delphine, Cousin, A., Gallet-Budynek, Anne, Centre National de la Recherche Scientifique (CNRS), Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre de Microscopie Électronique Appliquée à la Biologie (CMEAB), Toulouse Réseau Imagerie-Genotoul ( TRI-Genotoul), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-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 de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Hôpital de Rangueil, and CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse]
- Subjects
[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2018
19. Laser-induced breakdown spectroscopy: performance enhancement for multi-elemental soils analysis
- Author
-
Guézénoc, Julian, Syvilay, Delphine, Gallet-Budynek, Anne, Bousquet, Bruno, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2018
20. Laser-induced breakdown spectroscopy (LIBS): a review
- Author
-
Bousquet, Bruno, Syvilay, Delphine, Guézénoc, Julian, Bou Sleiman, Joyce, Gallet-Budynek, Anne, Centre National de la Recherche Scientifique (CNRS), Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Université de Bordeaux (UB), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2018
21. LIBS analysis of agricultural soils: from laboratory to on-site measurements
- Author
-
Guézénoc, Julian, Syvilay, Delphine, Gallet-Budynek, Anne, Bousquet, Bruno, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2018
22. Do agricultural practices impact carbon, nitrogen and phosphorus stoichiometry in plants and soils on the long term?
- Author
-
Ferchaud, Fabien, Mary, Bruno, Keuper, Frida, Mollier, Alain, Denoroy, Pascal, Morel, Christian, Gallet-Budynek, Anne, Houot, Sabine, Jouany, Claire, Hedde, Mickaël, Hinsinger, Philippe, Jourdan, Christophe, and Bertrand, Isabelle
- Published
- 2018
- Full Text
- View/download PDF
23. Projet AGROLIBS : utiliser la technologie LIBS pour analyser les sols, végétaux et matières fertilisantes
- Author
-
Gallet-Budynek, Anne, Bousquet, Bruno, Guézénoc, Julian, Denaix, Laurence, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2017
24. L’analyse de sols agricoles, plantes et fertilisants par la méthode LIBS
- Author
-
Guézénoc, Julian, Bassel, Léna, Bousquet, Bruno, Gallet-Budynek, Anne, ProdInra, Migration, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), and Comité Français d'Etude et de Développement de la Fertilisation Raisonnée (COMIFER). FRA.
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2017
25. Variables selection: a critical issue for quantitative laser-induced breakdown spectroscopy
- Author
-
Julian Guezenoc, Anne Gallet-Budynek, Bruno Bousquet, Léna Bassel, Interactions Sol Plante Atmosphère (ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), IRAMAT-Centre de recherche en physique appliquée à l’archéologie (IRAMAT-CRP2A), Institut de Recherches sur les Archéomatériaux (IRAMAT), Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Interactions Sol Plante Atmosphère (UMR ISPA), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM), Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS), and Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
coefficients plot ,[SDV]Life Sciences [q-bio] ,Analytical chemistry ,Feature selection ,01 natural sciences ,Spectral line ,analyse de sol ,Analytical Chemistry ,010309 optics ,0103 physical sciences ,Statistics ,Partial least squares regression ,Laser-induced breakdown spectroscopy ,Projection (set theory) ,soil analysis ,Instrumentation ,Spectroscopy ,Selection (genetic algorithm) ,variable influence on projection ,sol agricole ,Variable (mathematics) ,Mathematics ,LIBS ,agricultural soil ,quantitative analysis ,potassium ,010401 analytical chemistry ,Univariate ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,variable selection - Abstract
In this paper, we demonstrate the importance of variable selection on the prediction ability of LIBS quantitative partial least squares (PLS) models. The spectral lines of potassium at 766.49 nm and 769.90 nm were considered in the framework of an agricultural soils analysis. Univariate models demonstrating very poor correlation between the peak areas of the potassium lines and the related concentration values, a series of PLS models allowed to significantly improve the prediction ability compared to the univariate approach. This improvement was due to advanced variable selection, achieved through the use of two output data provided after PLS calculation, namely the Variable Importance in Projection (VIP) and the Coefficients graph. In this demonstration, the gain was significant because the two spectral lines of potassium at 766.49 nm and 769.90 nm exhibited unusual profiles. Indeed, including in a PLS model only the variables related to the edges of these lines allowed a significant improvement of its predictive ability (Q 2 = 0.84, RMSE = 1.49 g/kg) compared to another PLS model only including the variables related to the central parts of these lines (Q 2 = 0.78, RMSE = 1.59 g/kg).
- Published
- 2017
26. Evaluation of 11 terrestrial carbon–nitrogen cycle models against observations from two temperate <scp>F</scp> ree‐ <scp>A</scp> ir <scp>CO</scp> 2 <scp>E</scp> nrichment studies
- Author
-
Adrien C. Finzi, Ying-Ping Wang, Peter E. Thornton, Bassil El-Masri, Shusen Wang, Anthony P. Walker, Richard J. Norby, Ram Oren, Heather R. McCarthy, Soenke Zaehle, Belinda E. Medlyn, David Wårlind, Paul J. Hanson, Atul K. Jain, Colleen M. Iversen, William J. Parton, I. Colin Prentice, Thomas Hickler, Yiqi Luo, Martin G. De Kauwe, Ensheng Weng, Anne Gallet-Budynek, and Michael Dietze
- Subjects
Biomass (ecology) ,Physiology ,Ecology ,Soil organic matter ,Primary production ,Temperate forest ,Plant Science ,Soil carbon ,15. Life on land ,Atmospheric sciences ,Carbon cycle ,13. Climate action ,Environmental science ,Ecosystem ,Nitrogen cycle - Abstract
We analysed the responses of 11 ecosystem models to elevated atmospheric [CO2] (eCO(2)) at two temperate forest ecosystems (Duke and Oak Ridge National Laboratory (ORNL) Free-Air CO2 Enrichment (FACE) experiments) to test alternative representations of carbon (C)-nitrogen (N) cycle processes. We decomposed the model responses into component processes affecting the response to eCO(2) and confronted these with observations from the FACE experiments. Most of the models reproduced the observed initial enhancement of net primary production (NPP) at both sites, but none was able to simulate both the sustained 10-yr enhancement at Duke and the declining response at ORNL: models generally showed signs of progressive N limitation as a result of lower than observed plant N uptake. Nonetheless, many models showed qualitative agreement with observed component processes. The results suggest that improved representation of above-ground-below-ground interactions and better constraints on plant stoichiometry are important for a predictive understanding of eCO(2) effects. Improved accuracy of soil organic matter inventories is pivotal to reduce uncertainty in the observed C-N budgets. The two FACE experiments are insufficient to fully constrain terrestrial responses to eCO(2), given the complexity of factors leading to the observed diverging trends, and the consequential inability of the models to explain these trends. Nevertheless, the ecosystem models were able to capture important features of the experiments, lending some support to their projections. (Less)
- Published
- 2014
27. Appel à projets « Transfert » 2016, Bilan du projet AGROLIBS
- Author
-
Gallet-Budynek, Anne, Guézénoc, Julian, Bousquet, Bruno, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Centre National de la Recherche Scientifique (CNRS), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2016
28. Global assessment of limitation to symbiotic nitrogen fixation by phosphorus availability in terrestrial ecosystems using a meta-analysis approach
- Author
-
Florian Delerue, Anne Gallet-Budynek, David L. Achat, and Laurent Augusto
- Subjects
Atmospheric Science ,010504 meteorology & atmospheric sciences ,Biomass ,chemistry.chemical_element ,Biology ,01 natural sciences ,Environmental Chemistry ,0105 earth and related environmental sciences ,General Environmental Science ,2. Zero hunger ,Global and Planetary Change ,Phosphorus ,fungi ,food and beverages ,04 agricultural and veterinary sciences ,Ultisol ,15. Life on land ,Indirect effect ,Agronomy ,chemistry ,Oxisol ,Soil water ,040103 agronomy & agriculture ,Nitrogen fixation ,0401 agriculture, forestry, and fisheries ,Terrestrial ecosystem - Abstract
1
- Published
- 2013
29. LIBS analysis of soils from New Caledonia to evaluate the environmental impact of the extraction of nickel ore
- Author
-
Guezenoc, J., Pasquet, C., Gunkel-Grillon, P., Le Mestre, M., Laporte-Magoni Christine, Bassel, L., Adamietz, F., Gallet-Budynek, A., Bousquet, B., Pôle Pluridisciplinaire de la Matière et de l'Environnement (PPME), Université de la Nouvelle-Calédonie (UNC), and BUNC, Pole ID
- Subjects
[SDE] Environmental Sciences ,[SDE]Environmental Sciences ,[SDU.STU] Sciences of the Universe [physics]/Earth Sciences ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
30. LIBS analysis of soils from New Caledonia to evaluate the environmental impact of the extraction of nickel ore
- Author
-
Guezenoc, Julian, Pasquet, Camille, Gunkel-Grillon, Peggy, Bassel, Léna, Bousquet, Bruno, Gallet-Budynek, Anne, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Université de la Nouvelle-Calédonie (UNC), IRAMAT-Centre de recherche en physique appliquée à l’archéologie (IRAMAT-CRP2A), Institut de Recherches sur les Archéomatériaux (IRAMAT), Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and 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)
- Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
31. LIBS analysis of agricultural soils: Accurate control of a portable LIBS instrument to assess the analytical ability of the method
- Author
-
Bousquet, Bruno, Guezenoc, Julian, Melkebeke, Clément, Bassel, Léna, Gallet-Budynek, Anne, Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), IRAMAT-Centre de recherche en physique appliquée à l’archéologie (IRAMAT-CRP2A), Institut de Recherches sur les Archéomatériaux (IRAMAT), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Montaigne-Université de Technologie de Belfort-Montbeliard (UTBM), ProdInra, Migration, Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Interactions Sol Plante Atmosphère (ISPA), Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
32. Future challenges in coupled C–N–P cycle models for terrestrial ecosystems under global change: a review
- Author
-
David L. Achat, Laurent Augusto, Anne Gallet-Budynek, Denis Loustau, Interactions Sol Plante Atmosphère (UMR ISPA), and Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro)
- Subjects
Nutrient cycle ,010504 meteorology & atmospheric sciences ,[SDE.MCG]Environmental Sciences/Global Changes ,Climate change ,01 natural sciences ,carbon cycle ,nitrogen cycle ,Environmental Chemistry ,Ecosystem ,Phosphorus cycle ,Nitrogen cycle ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Water Science and Technology ,2. Zero hunger ,Rhizosphere ,Ecology ,Global change ,04 agricultural and veterinary sciences ,15. Life on land ,terrestrial ecosystem models ,[INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation ,13. Climate action ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,C:N:P stoichiometry ,Terrestrial ecosystem ,plant adjustments ,phosphorus cycle - Abstract
International audience; Climate change has consequences for terrestrial functioning, but predictions of plant responses remain uncertain because of the gaps in the representation of nutrient cycles and C–N–P interactions in ecosystem models. Here, we review the processes that are included in ecosystem models, but focus on coupled C–N–P cycle models. We highlight important plant adjustments to climate change, elevated atmospheric CO2, and/or nutrient limitations that are currently not—or only partially—incorporated in ecosystem models by reviewing experimental studies and compiling data. Plant adjustments concern C:N:P stoichiometry, photosynthetic capacity, nutrient resorption rates, allocation patterns, symbiotic N2 fixation and root exudation (phosphatases, carboxylates) and the effect of root exudation on nutrient mobilization in the soil rhizosphere (P solubilization, biochemical mineralization of organic P and priming effect). We showed that several plant adjustments could be formulated and calibrated using existing experimental data in the literature. Finally, we proposed a roadmap for future research because improving ecosystem models necessitate specific data and collaborations between modelers and empiricists.
- Published
- 2016
33. Drying-induced changes in phosphorus status of soils with contrasting soil organic matter contents – Implications for laboratory approaches
- Author
-
David L. Achat, Laurent Augusto, Anne Gallet-Budynek, Mark R. Bakker, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), and Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)
- Subjects
Soil test ,[SDV]Life Sciences [q-bio] ,Soil Science ,microbial P ,010501 environmental sciences ,complex mixtures ,01 natural sciences ,Organic matter ,0105 earth and related environmental sciences ,2. Zero hunger ,chemistry.chemical_classification ,water soluble phosphate ions ,Chemistry ,soil dryings oil organic matter ,Soil organic matter ,04 agricultural and veterinary sciences ,Mineralization (soil science) ,15. Life on land ,Soil type ,total organic P ,13. Climate action ,Environmental chemistry ,[SDE]Environmental Sciences ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Soil horizon ,Soil fertility ,surface and deep forest soils - Abstract
International audience; Phosphorus (P) fractions are commonly assessed on dried soils in environmental and long-term field research, because this is the most convenient method of storing large quantities of samples before analysis. However sample pre-treatment may seriously affect the results, especially those regarding the organic P fractions. The objective of the present study was to assess the effect of soil drying under laboratory conditions on the P status of soils with contrasting physico-chemical and microbial properties. We used soils from a ( Pinus pinaster) forest in southwest France sampled from different soil depths and different site classes featuring a gradient of soil organic matter (SOM), and aluminium (Al) and iron (Fe) oxides. Total P, total organic and inorganic P, water soluble phosphate ions (iP), microbial P and the potentially mineralizable P in 'dead' organic matter were determined on fresh, moist soils maintained at 4°C and on the same soils, oven-dried at 60°C. Laboratory-drying resulted in a general decrease in total organic P, which was positively correlated with microbial P and SOM content. These drying-induced changes in total organic P were associated with a concomitant increase in total inorganic P and water soluble iP, which were dramatic in the organic forest floor samples (on average +2965% (*31 increase) in total inorganic P, and +11880% (*123 increase) in water soluble iP). The changes in water soluble iP were correlated with the SOM: Al and Fe oxides ratio and showed little effect of soil drying in deeper soil layers with a low SOM and high oxide contents. Our results indicated that soil drying mainly resulted in the lysis of the microbial pool, and to a much lesser extent, in the physical disruption and mineralization of the SOM. We conclude that soil drying before analyses can generate a significant bias in the evaluation of soil P stocks and fluxes, especially in SOM-rich layers. We recommend that fresh soil samples should be used as far as possible to determine soil P status.
- Published
- 2012
34. Microbial processes controlling P availability in forest spodosols as affected by soil depth and soil properties
- Author
-
David L. Achat, Christian Morel, Laurent Augusto, Mark R. Bakker, Anne Gallet-Budynek, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), and Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)
- Subjects
010504 meteorology & atmospheric sciences ,P AVAILABILITY ,Soil biodiversity ,Soil biology ,Bulk soil ,Soil Science ,PROPRIÉTÉ DU SOL ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,complex mixtures ,01 natural sciences ,Microbiology ,PHOSPHORE MICROBIEN ,SOUS-SOL ,MICROBIAL P ,MINERALIZATION OF P IN ‘DEAD’ ORGANIC MATTER ,0105 earth and related environmental sciences ,COUCHE PROFONDE DU SOL ,2. Zero hunger ,Topsoil ,Soil organic matter ,SOIL PROPERTIES ,Soil morphology ,04 agricultural and veterinary sciences ,15. Life on land ,Agronomy ,13. Climate action ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Soil horizon ,FOREST SPODOSOLS ,Soil fertility ,SURFACE AND DEEP SOIL LAYERS - Abstract
International audience; Because carbon dioxide (CO2) concentration is rising, increases in plant biomass and productivity of terrestrial ecosystems are expected. However, phosphorus (P) unavailability may disable any potential enhanced growth of plants in forest ecosystems. In response to P scarcity under elevated CO2, trees may mine deeper the soil to take up more nutrients. In this scope, the ability of deep horizons of forest soils to supply available P to the trees has to be evaluated. The main objective of the present study was to quantify the relative contribution of topsoil horizons and deep horizons to P availability through processes governed by the activity of soil micro-organisms. Since soil properties vary with soil depth, one can therefore assume that the role of microbial processes governing P availability differs between soil layers. More specifically, our initial hypothesis was that deeper soil horizons could substantially contribute to total plant available P in forested ecosystems and that such contribution of deep horizons differs among sites (due to contrasting soil properties). To test this hypothesis, we quantified microbial P and mineralization of P in ‘dead’ soil organic matter to a depth of 120 cm in forest soils contrasting in soil organic matter, soil moisture and aluminum (Al) and iron (Fe) oxides. We also quantified microbiological activity and acid phosphomonoesterase activity. Results showed that the role of microbial processes generally decreases with increasing soil depth. However, the relative contribution of surface (litter and 0–30 cm) and deep (30–120 cm) soil layers to the stocks of available P through microbial processes (51–62 kg P ha−1) are affected by several soil properties, and the contribution of deep soil layers to these stocks vary between sites (from 29 to 59%). This shows that subsoils should be taken into account when studying the microbial processes governing P availability in forest ecosystems. For the studied soils, microbial P and mineralization of P in ‘dead’ soil organic matter particularly depended on soil organic matter content, soil moisture and, to a minor extent, Al oxides. High Al oxide contents in some sites or in deep soil layers probably result in the stabilization of soil organic compounds thus reducing microbiological activity and mineralization rates. The mineralization process in the litter also appeared to be P-limited and depended on the C:P ratio of soil organic matter. Thus, this study highlighted the effects of soil depth and soil properties on the microbial processes governing P availability in the forest spodosols.
- Published
- 2012
35. Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long-term enhancement of forest productivity under elevated CO2
- Author
-
Seth G. Pritchard, M. Luke McCormack, Richard P. Phillips, Sharon A. Billings, Kurt S. Johnsen, John E. Drake, Kirsten S. Hofmockel, Ram Oren, Robert B. Jackson, David J. P. Moore, Emily S. Bernhardt, John Lichter, Evan H. DeLucia, Sari Palmroth, Kathleen K. Treseder, Jeffrey S. Pippen, Adrien C. Finzi, Heather R. McCarthy, William H. Schlesinger, and Anne Gallet-Budynek
- Subjects
0106 biological sciences ,2. Zero hunger ,Biogeochemical cycle ,010504 meteorology & atmospheric sciences ,Ecology ,Chemistry ,Primary production ,15. Life on land ,Carbon sequestration ,Photosynthesis ,01 natural sciences ,Carbon cycle ,chemistry.chemical_compound ,13. Climate action ,Carbon dioxide ,Ecosystem ,Nitrogen cycle ,Ecology, Evolution, Behavior and Systematics ,010606 plant biology & botany ,0105 earth and related environmental sciences - Abstract
The earth’s future climate state is highly dependent upon changes in terrestrial C storage in response to rising concentrations of atmospheric CO2. Here we show that consistently enhanced rates of net primary production (NPP) are sustained by a C-cascade through the root-microbe-soil system; increases in the flux of C belowground under elevated CO2 stimulated microbial activity, accelerated the rate of soil organic matter decomposition and stimulated tree uptake of N bound to this SOM. This process set into motion a positive feedback maintaining greater C gain under elevated CO2 as a result of increases in canopy N content and higher photosynthetic N-use efficiency. The ecosystem-level consequence of the enhanced requirement for N and the exchange of plant C for N belowground is the dominance of C storage in tree biomass but the preclusion of a large C sink in the soil.
- Published
- 2011
36. Assessing turnover of microbial biomass phosphorus: Combination of an isotopic dilution method with a mass balance model
- Author
-
David L. Achat, Mark R. Bakker, Christian Morel, Sylvain Pellerin, Maya Gonzalez, Laurent Augusto, Anne Gallet-Budynek, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), ENITAB (Ecole Nationale d'Ingenieurs des Travaux Agricoles de Bordeaux, France), and Aquitaine region, France
- Subjects
0106 biological sciences ,P AVAILABILITY ,Microorganism ,Soil Science ,[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study ,01 natural sciences ,Microbiology ,FOREST ECOSYSTEM ,chemistry.chemical_compound ,Ecosystem ,Organic matter ,chemistry.chemical_classification ,Chemistry ,Soil organic matter ,MICROBIAL BIOMASS ,MASS BALANCE MODEL ,food and beverages ,ISOTOPIC DILUTION METHOD ,04 agricultural and veterinary sciences ,15. Life on land ,Phosphate ,PHOSPHORUS ,Turnover ,Environmental chemistry ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,TURNOVER ,P CYCLING ,Cycling ,010606 plant biology & botany - Abstract
International audience; Microbial biomass phosphorus (P) can play an important role in P cycling and availability to plants by acting as a source (remineralization) or sink (immobilization) of phosphate ions (iP). To assess the role of the microbial P pools, both the dynamics (i.e. the turnover) and the size of the microbial P pools were studied in forest soils. Combining an isotopic dilution method with a modelling approach, we showed the existence of two pools of microbial P with different dynamics and therefore of different importance in soil P availability and cycling. In particular, we showed that the largest pool of microbial P (80%) had a fast turnover (nine days). Microbial P increased with an increase in soil organic matter and represented up to 53% of total P in contrasting forest soils. By combining these results with the turnover times of microbial P obtained in the modelling study, we evaluated that 8.5–17.3 kg P ha−1 of microbial P could turn over in a few days. This suggests that microbial biomass P is a potentially significant source of available iP, and that micro-organisms can play a major role in P cycling in the forest studied here. However, microbial biomass can also be in competition with the trees since most of the remineralized P could be immobilized again in the microbial turnover.
- Published
- 2010
37. Increases in nitrogen uptake rather than nitrogen-use efficiency support higher rates of temperate forest productivity under elevated CO2
- Author
-
Birgit Gielen, Carlo Calfapietra, Donald R. Zak, Robert B. Jackson, Reinhart Ceulemans, Andrea Polle, Seth G. Pritchard, Colleen M. Iversen, Mark E. Kubiske, Anne Gallet-Budynek, Joanne Ledford, Marcel R. Hoosbeek, Adrien C. Finzi, William H. Schlesinger, William E. Holmes, Richard J. Norby, Ram Oren, and Marion Liberloo
- Subjects
Biogeochemical cycle ,Nitrogen ,Climate ,atmospheric carbon-dioxide ,enrichment face ,organic nitrogen ,Earth System Science ,Trees ,Forest ecology ,Organic matter ,Ecosystem ,populus-tremuloides ,community composition ,Nitrogen cycle ,soil-n availability ,chemistry.chemical_classification ,rotation poplar plantation ,Multidisciplinary ,WIMEK ,Ecology ,Temperate forest ,Primary production ,Biological Transport ,deciduous forest ,Biological Sciences ,Carbon Dioxide ,Kinetics ,Agronomy ,chemistry ,Productivity (ecology) ,Environmental science ,Leerstoelgroep Aardsysteemkunde ,fine-root production ,ecosystem responses - Abstract
Forest ecosystems are important sinks for rising concentrations of atmospheric CO 2 . In previous research, we showed that net primary production (NPP) increased by 23 ± 2% when four experimental forests were grown under atmospheric concentrations of CO 2 predicted for the latter half of this century. Because nitrogen (N) availability commonly limits forest productivity, some combination of increased N uptake from the soil and more efficient use of the N already assimilated by trees is necessary to sustain the high rates of forest NPP under free-air CO 2 enrichment (FACE). In this study, experimental evidence demonstrates that the uptake of N increased under elevated CO 2 at the Rhinelander, Duke, and Oak Ridge National Laboratory FACE sites, yet fertilization studies at the Duke and Oak Ridge National Laboratory FACE sites showed that tree growth and forest NPP were strongly limited by N availability. By contrast, nitrogen-use efficiency increased under elevated CO 2 at the POP-EUROFACE site, where fertilization studies showed that N was not limiting to tree growth. Some combination of increasing fine root production, increased rates of soil organic matter decomposition, and increased allocation of carbon (C) to mycorrhizal fungi is likely to account for greater N uptake under elevated CO 2 . Regardless of the specific mechanism, this analysis shows that the larger quantities of C entering the below-ground system under elevated CO 2 result in greater N uptake, even in N-limited ecosystems. Biogeochemical models must be reformulated to allow C transfers below ground that result in additional N uptake under elevated CO 2 .
- Published
- 2007
38. Direct and indirect control of biological nitrogen fixation by phosphorus availability in terrestrial ecosystems
- Author
-
Laurent AUGUSTO, Florian Delerue, Anne Gallet-Budynek, Achat, David L., Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2014
39. Biogeochemistry of P in the southwest of France – case studies from Pinus pinaster forests on sandy podzols sandy soils
- Author
-
Bakker, Mark R., Achat, David L., Augusto, Laurent, Gallet-Budynek, Anne, Morel, Christian, Interactions Sol Plante Atmosphère (UMR ISPA), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), and ProdInra, Migration
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2014
40. Evaluation of 11 terrestrial carbon-nitrogen cycle models against observations from two temperate free-air CO2 enrichment studies
- Author
-
Zaehle, Sönke, Medlyn, Belinda E., De Kauwe, Martin G., Walker, Anthony P., Dietze, Michael C., Hickler, Thomas, Luo, Yiqi, Wang, Ying-Ping, El-Masri, Bassil, Thornton, Peter, Jain, Atul, Wang, Shusen, Warlind, David, Weng, Ensheng, Parton, William, Iversen, Colleen M., Gallet-Budynek, Anne, McCarthy, Heather, Finzi, Adrien, Hanson, Paul J., Prentice, Iain Colin, Oren, Ram, Norby, Richard J., Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft, Department of Biological Science, University of Denver, Oak Ridge National Laboratory, Department of Earth and Environment [Boston], Boston University [Boston] (BU), Biodiversity and Climate Research Centre (BiK-F) (LOEWE), Department of Physical Geography, Goethe-Universität Frankfurt am Main, University of Oklahoma (OU), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Department of Atmospheric Sciences, Yonsei University, Department of Atmospheric Science, Colorado State University [Fort Collins] (CSU), Natural Resources Canada (NRCan), Department of Physical Geography and Ecosystem Science, Lund University, Department of Ecology and Evolutionary Biology, Princeton University, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), Department of Biology [Gainesville] (UF|Biology), University of Florida [Gainesville] (UF), Imperial College London, Duke University [Durham], Swedish University of Agricultural Sciences (SLU), National Center for Ecological Analysis and Synthesis, National Science Foundation (NSF) [EF-0553768], University of California, Santa Barbara, State of California, US Department of Energy Office of Science, Biological and Environmental Research Program, FP7 people programme [PERG02-GA-2007-224775, 238366], ARC [DP1094791], Hesse's Ministry of Higher Education, [FACE], [DE-FG02-95ER62083], and European Project: 238366,EC:FP7:PEOPLE,FP7-PEOPLE-ITN-2008,GREENCYCLESII(2010)
- Subjects
PINE FOREST ,model evaluation ,Time Factors ,Nitrogen ,[SDE.MCG]Environmental Sciences/Global Changes ,GLOBAL VEGETATION MODELS ,Free-Air CO2Enrichment (FACE) ,Models, Biological ,nitrogen (N) limitation ,SWEETGUM PLANTATION ,Carbon Cycle ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,Biomass ,Free-Air CO2 ,ATMOSPHERIC CO2 ,CO2 fertilization ,Ecosystem ,elevated CO2 ,Science & Technology ,CANOPY PRODUCTION ,plant physiology ,Atmosphere ,Research ,Air ,Plant Sciences ,FOREST PRODUCTIVITY ,Carbon Dioxide ,Nitrogen Cycle ,ecosystem modelling ,Enrichment (FACE) ,Carbon ,DECIDUOUS FOREST ,Free-Air CO2 Enrichment (FACE) ,LIGHT-USE EFFICIENCY ,SOIL CARBON ,Life Sciences & Biomedicine ,carbon (C) storage - Abstract
International audience; We analysed the responses of 11 ecosystem models to elevated atmospheric [CO2] (eCO2) at two temperate forest ecosystems (Duke and Oak Ridge National Laboratory (ORNL) Free-Air CO2 Enrichment (FACE) experiments) to test alternative representations of carbon (C)–nitrogen (N) cycle processes. * We decomposed the model responses into component processes affecting the response to eCO2 and confronted these with observations from the FACE experiments. * Most of the models reproduced the observed initial enhancement of net primary production (NPP) at both sites, but none was able to simulate both the sustained 10-yr enhancement at Duke and the declining response at ORNL: models generally showed signs of progressive N limitation as a result of lower than observed plant N uptake. Nonetheless, many models showed qualitative agreement with observed component processes. The results suggest that improved representation of above-ground–below-ground interactions and better constraints on plant stoichiometry are important for a predictive understanding of eCO2 effects. Improved accuracy of soil organic matter inventories is pivotal to reduce uncertainty in the observed C–N budgets. * The two FACE experiments are insufficient to fully constrain terrestrial responses to eCO2, given the complexity of factors leading to the observed diverging trends, and the consequential inability of the models to explain these trends. Nevertheless, the ecosystem models were able to capture important features of the experiments, lending some support to their projections.
- Published
- 2014
41. Comparison of ingrowth bags and ingrowth meshes in root studies: 3 years of data on Pinus pinaster and its understory
- Author
-
Mark Ronald Bakker, Frida Andreasson, Anne Gallet-Budynek, Laurent AUGUSTO, Maya Gonzalez, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), and European Cooperation in Science and Technology (COST). BEL.
- Subjects
pinus pinaster ,système racinaire ,nutriment ,erica cinerea ,[SDV]Life Sciences [q-bio] ,productivité forestière ,végétation du sous bois ,durabilité des forêts ,pteridium aquilinum ,calluna vulgaris ,écosystème ,molinia caerulea ,[SDE]Environmental Sciences ,carbone ,sud ouest france ,ComputingMilieux_MISCELLANEOUS ,cytisus scoparius - Abstract
National audience
- Published
- 2013
42. Global assessment of limitation to symbiotic nitrogen fixation by phosphorus availability in terrestrial ecosystems using a meta-analysis approach
- Author
-
Augusto, Laurent, Delerue, Florian, Gallet-Budynek, Anne, Achat D.L., David, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), and Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)
- Subjects
[SDV]Life Sciences [q-bio] ,fungi ,[SDE]Environmental Sciences ,food and beverages ,phosphorus bioavailability ,symbiotic nitrogen fixation ,meta-analysis - Abstract
International audience; Symbiotic nitrogen fixation (SNF) is the main natural source of nitrogen (N) in terrestrial ecosystems worldwide. Previous studies have shown that fixation of N by plants can be limited by the availability of phosphorus (P) in soils. We used global meta-analysis to investigate how P availability controls SNF. In experiments in which plants were grown in an artificial medium, severe P deficiencies in the nutritive solution ([PO4]
- Published
- 2013
43. Contribution of understory species to total ecosystem aboveground and belowground biomass in temperate Pinus pinaster Ait. forests
- Author
-
Mark R. Bakker, Jianming Xue, Florian Delerue, Laurent Augusto, Nathalie Yauschew-Raguenes, Dominique Guyon, David L. Achat, Maya Gonzalez, Sylvie Niollet, Frida Andreasson, Anne Gallet-Budynek, Pierre Trichet, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), New Zealand Forest Research Institute, Biodiversité, Gènes & Communautés (BioGeCo), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB), Écologie fonctionnelle et physique de l'environnement (EPHYSE), and Institut National de la Recherche Agronomique (INRA)
- Subjects
0106 biological sciences ,Cytisus scoparius ,Biomass (ecology) ,[SDV]Life Sciences [q-bio] ,Forestry ,Molinia caerulea ,Understory ,15. Life on land ,Management, Monitoring, Policy and Law ,Biology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Forest ecology ,Botany ,[SDE]Environmental Sciences ,Pinus pinaster ,Ecosystem ,Caerulea ,understory ,biomass ,roots ,allometry ,pine forest ,phytovolume ,ComputingMilieux_MISCELLANEOUS ,010606 plant biology & botany ,Nature and Landscape Conservation - Abstract
By overemphasizing the role of overstory trees in forest studies, researchers, managers and policy makers could well ignore an important functional component of the forest ecosystem: the understory. This could be particularly true in forests with relatively open canopies. In maritime pine (Pinus pinaster Ait.) plantation forests in the southwest of France, a considerable amount of the direct radiation is transmitted through the canopy and is available for the growth of understory species. This study focused on five dominant understory species, including three woody species (Calluna vulgaris L., Erica cinerea L. and Cytisus scoparius L.) and two herbaceous perennials species (Molinia caerulea L. (Moench) and Pteridium aquilinum L. Khun). For each species five pine stands with varying amounts of understory were selected to predict biomass for a wide range of values. The number of pine trees and their dimensions were recorded enabling us to estimate the aboveground and root biomass of the pines using allometric relationships. Biometrical measurements of the understory and destructive harvests were carried out in each stand to measure aboveground, coarse and fine root biomass. The results showed that the understory represented an average of 6.8% of total ecosystem aboveground biomass and 27.4% of total ecosystem root biomass, underlining the need for a broader view of this component of the forest ecosystem. Allometric relationships derived from the biometrical data enabled satisfactory predictions of aboveground biomass for all five understory species and for belowground biomass of three species (M. caerulea, P. aquilinum, C. scoparius); allometric relationships failed to predict root biomass for two woody understory species (E. cinerea and C. vulgaris).
- Published
- 2013
44. Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long-term enhancement of forest productivity under elevated CO₂
- Author
-
John E, Drake, Anne, Gallet-Budynek, Kirsten S, Hofmockel, Emily S, Bernhardt, Sharon A, Billings, Robert B, Jackson, Kurt S, Johnsen, John, Lichter, Heather R, McCarthy, M Luke, McCormack, David J P, Moore, Ram, Oren, Sari, Palmroth, Richard P, Phillips, Jeffrey S, Pippen, Seth G, Pritchard, Kathleen K, Treseder, William H, Schlesinger, Evan H, Delucia, and Adrien C, Finzi
- Subjects
Nitrogen ,Climate ,North Carolina ,Biomass ,Carbon Dioxide ,Nitrogen Cycle ,Plant Roots ,Carbon ,Ecosystem ,Soil Microbiology ,Carbon Cycle ,Trees - Abstract
The earth's future climate state is highly dependent upon changes in terrestrial C storage in response to rising concentrations of atmospheric CO₂. Here we show that consistently enhanced rates of net primary production (NPP) are sustained by a C-cascade through the root-microbe-soil system; increases in the flux of C belowground under elevated CO₂ stimulated microbial activity, accelerated the rate of soil organic matter decomposition and stimulated tree uptake of N bound to this SOM. This process set into motion a positive feedback maintaining greater C gain under elevated CO₂ as a result of increases in canopy N content and higher photosynthetic N-use efficiency. The ecosystem-level consequence of the enhanced requirement for N and the exchange of plant C for N belowground is the dominance of C storage in tree biomass but the preclusion of a large C sink in the soil.
- Published
- 2011
45. Predicting the soil phosphorus dynamics of the ploughed layer under continuous cultivation and pfertilization ploughed layer under continuous cultivation and p fertilization
- Author
-
Christian MOREL, Laurent Augusto, Anne Gallet-Budynek, ProdInra, Migration, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), and American Geophysical Union (AGU). Labo/service de l'auteur, Ville service, USA.
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,phosphorus ,soil ,dynamic ,processes ,cycles ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2011
46. Sources of increased N uptake in forest trees growing under elevated CO2: results of a large-scale 15N study
- Author
-
Kirsten S. Hofmockel, Anne Gallet-Budynek, Robert B. Jackson, William S. Currie, Heather R. McCarthy, Adrien C. Finzi, Iowa State University (ISU), Nicholas School of the Environment and Earth Sciences, Duke University [Durham], Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), Department of Biology [Gainesville] (UF|Biology), University of Florida [Gainesville] (UF), Department of Earth System Science [Irvine] (ESS), University of California [Irvine] (UCI), University of California-University of California, and School of Natural Resources and Environment
- Subjects
Nutrient cycle ,010504 meteorology & atmospheric sciences ,PINUS TAEDA ,[SDE.MCG]Environmental Sciences/Global Changes ,Growing season ,01 natural sciences ,DISPONIBILITÉ ,Animal science ,CARBON SEQUESTRATION ,Botany ,Environmental Chemistry ,ATMOSPHERIC CO2 ,0105 earth and related environmental sciences ,General Environmental Science ,Global and Planetary Change ,Biomass (ecology) ,FACE EXPERIMENT ,Ecology ,15N ,04 agricultural and veterinary sciences ,15. Life on land ,Plant litter ,N CYCLING ,Productivity (ecology) ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Soil horizon ,Terrestrial ecosystem ,Cycling - Abstract
International audience; Nitrogen availability in terrestrial ecosystems strongly influences plant productivity and nutrient cycling in response to increasing atmospheric carbon dioxide (CO2). Elevated CO2 has consistently stimulated forest productivity at the Duke Forest free-air CO2 enrichment experiment throughout the decade-long experiment. It remains unclear how the N cycle has changed with elevated CO2 to support this increased productivity. Using natural-abundance measures of N isotopes together with an ecosystem-scale 15N tracer experiment, we quantified the cycling of 15N in plant and soil pools under ambient and elevated CO2 over three growing seasons to determine how elevated CO2 changed N cycling between plants, soil, and microorganisms. After measuring natural-abundance 15N differences in ambient and CO2-fumigated plots, we applied inorganic 15N tracers and quantified the redistribution of 15N for three subsequent growing seasons. The natural abundance of leaf litter was enriched under elevated compared to ambient CO2, consistent with deeper rooting and enhanced N mineralization. After tracer application, 15N was initially retained in the organic and mineral soil horizons. Recovery of 15N in plant biomass was 3.5 ± 0.5% in the canopy, 1.7 ± 0.2% in roots and 1.7 ± 0.2% in branches. After two growing seasons, 15N recoveries in biomass and soil pools were not significantly different between CO2 treatments, despite greater total N uptake under elevated CO2. After the third growing season, 15N recovery in trees was significantly higher in elevated compared to ambient CO2. Natural-abundance 15N and tracer results, taken together, suggest that trees growing under elevated CO2 acquired additional soil N resources to support increased plant growth. Our study provides an integrated understanding of elevated CO2 effects on N cycling in the Duke Forest and provides a basis for inferring how C and N cycling in this forest may respond to elevated CO2 beyond the decadal time scale.
- Published
- 2011
47. Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long-term enhancement of forest productivity under elevated CO(2)
- Author
-
Drake, John E., Gallet-Budynek, Anne, Hofmockel, Kirsten S., Bernhardt, Emily S., Billings, Sharon A., Jackson, Robert B., Johnsen, Kurt S., Lichter, John, McCarthy, Heather R., McCormack, M. Luke, Moore, David J.P., Oren, Ram, Palmroth, Sari, Phillips, Richard P., Pippen, Jeffrey S., Pritchard, Seth G., Treseder, Kathleen K., Schlesinger, William H., DeLucia, Evan H., Finzi, Adrien C., University of Illinois System, Department of Biology [Gainesville] (UF|Biology), University of Florida [Gainesville] (UF), Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), Department of Ecology, Evolution and Organismal Biology, Iowa State University (ISU), Department of Biology, Duke University, University of Kansas [Lawrence] (KU), Nicholas School of the Environment, Duke University [Durham], US Forest Service, Bowdoin College, Department of Earth System Science [Irvine] (ESS), University of California [Irvine] (UCI), University of California-University of California, Pennsylvania State University (Penn State), Penn State System, King‘s College London, Indiana University [Bloomington], Indiana University System-Indiana University System, College of Charleston, Department of Ecology and Evolutionary Biology, University of California, Cary Institute of Ecosystem Studies, and University of Illinois at Urbana-Champaign [Urbana]
- Subjects
NITROGEN ,COUPLED BIOGEOCHEMICAL CYCLES ,CARBON SEQUESTRATION ,STOCKAGE DE CARBONE ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ABSORPTION D'AZOTE ,FOREST PRODUCTIVITY ,ELEVATED CO2 ,COUPLED CLIMATE-CARBON CYCLE MODELS - Abstract
International audience; The earth’s future climate state is highly dependent upon changes in terrestrial C storage in response to rising concentrations of atmospheric CO2. Here we show that consistently enhanced rates of net primary production (NPP) are sustained by a C-cascade through the root-microbe-soil system; increases in the flux of C belowground under elevated CO2 stimulated microbial activity, accelerated the rate of soil organic matter decomposition and stimulated tree uptake of N bound to this SOM. This process set into motion a positive feedback maintaining greater C gain under elevated CO2 as a result of increases in canopy N content and higher photosynthetic N-use efficiency. The ecosystem-level consequence of the enhanced requirement for N and the exchange of plant C for N belowground is the dominance of C storage in tree biomass but the preclusion of a large C sink in the soil.
- Published
- 2011
48. Relationship between phosphorus availability and symbiotic n2 fixation rate in terrestrial ecosystems
- Author
-
Delerue, Florian, Gallet-Budynek, Anne, Achat, D., and Augusto, Laurent
- Subjects
azote ,écosystème terrestre ,phosphorus ,nitrogen ,plant biomass ,processes ,cycles ,rate - Abstract
Symbiotic nitrogen fixation is the main natural source ofnitrogen in ecosystems. Previous studies have shown that this process can be limited by the availability of phosphorus (P) in soils. However, it is still unclear whether or not phosphorus controls symbiotic nitrogen fixation. Through a compilation of a global dataset, our analyses showed that worldwide in the case of nutritive solution experiments, the specific nitrogen fixation rate increased until a very low P concentration threshold value but remained constant above this value. Conversely, in field experiments, the specific fixation rate remained constant at any P supply, highlighting that plants can obtain sufficient P from the soil to maintain an optimal nitrogen fixation rate. Those results wereeconfirmed by an extensive analysis of soil P status throughout the world, showing always adequate quantities of bioavailable soil P, despite common low soil solution phosphorus values. Our results demonstrate that the in situ symbiotic nitrogen fixation rate is not dependent on P availability and that the fixation flux is only proportional to plant biomass increment. By identifying the mechanistic basis for the phosphorus control of terrestrial nitrogen fixation, this study provides a theoretical framework easily implementable into further models that couple nutrient cycling and global changes.
- Published
- 2011
49. Characterization of P status in forest soils: stocks, fluxes and models
- Author
-
Laurent AUGUSTO, David Achat, Mark Ronald Bakker, Anne Gallet-Budynek, Maya Gonzalez, ProdInra, Migration, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), and Ville service.
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2010
50. Characterization of P status in forest soils : stocks, fluxes and models
- Author
-
Achat, David, Morel, Christian, Bakker, Mark Ronald, Augusto, Laurent, Gallet-Budynek, Anne, Gonzalez, Maya, Jonard, Mathieu, ProdInra, Migration, Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM), Institut National de la Recherche Agronomique (INRA)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB), Université Catholique de Louvain = Catholic University of Louvain (UCL), and Saisissez le nom du laboratoire, du service ou du département., Ville service.
- Subjects
[SDV] Life Sciences [q-bio] ,[SDE] Environmental Sciences ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences - Abstract
International audience; Phosphorus (P) is a critical limiting factor of plant growth and production in many ecosystems, which often require to be fertilized. However, there is an increasing concern regarding appropriate local and global management of phosphorus resources, since the existing finite phosphate reserves are rapidly being depleted. This implies to understand what processes (biological, physico-chemical) are governing soil P availability in agroecosystems, and in particular in forests, which will be increasingly managed for their C-sink potential in the future. We characterized the P status in forest soils of the largest managed pine forest in Europe (Landes of Gascogne, southwest of France) using isotopic and extraction methods, as well as modelling approaches. Total P concentration in topsoils were extremely low, ranging from 7 to 195 mg Pkg-1. The concentration of phosphate ions in solution decreased with depth and was related to the Al and Fe oxide content, which controlled the diffusion of P from the soil solid phase to the solution. The gross amount of diffusive P in one week as determined by 32P isotopic dilution in batch experiments was low, ranging from 0.2 to 52 mg P kg-1 in the topsoil layer, and could be predicted by pedotransfer functions built on the Al and Fe oxide and soil organic matter contents. Organic P represented 80% of total P in litter and 60% in the surface mineral soil layer, suggesting a higher contribution of biological processes to soil P cycling. Biological mineralization of organic P was quantified using a long-term incubation study (154 days) of a low-sorbing soil labelled with 33P, associated with a batch experiment with 32P labelled soil: gross mineralization of dead soil organic matter and diffusive phosphate P were low (
- Published
- 2010
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.