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The relationship between climate and the intra-annual oxygen isotope patterns from pine trees: a case study along an elevation gradient on Corsica, France / Sonja Szymczak in Annals of Forest Science [en ligne], Vol 76 n° 3 (September 2019)  

Public [article]  inAnnals of Forest Science [en ligne] > Vol 76 n° 3 (September 2019) . - 14 p Titre : The relationship between climate and the intra-annual oxygen isotope patterns from pine trees: a case study along an elevation gradient on Corsica, France Type de document : Article/Communication Auteurs : Sonja Szymczak, Auteur ; Achim Bräuning, Auteur ; Martin Häusser, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : 14 p Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] carbone [Termes descripteurs IGN] changement climatique [Termes descripteurs IGN] Corse [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] dendrologie [Termes descripteurs IGN] gradient d'altitude [Termes descripteurs IGN] humidité du sol [Termes descripteurs IGN] isotope [Termes descripteurs IGN] oxygène (O²) [Termes descripteurs IGN] Pinus nigra corsicana [Termes descripteurs IGN] Pinus pinaster [Vedettes matières IGN] Végétation et changement climatique Résumé : (auteur) Key message: Intra-annual oxygen isotope patterns of tree-ring cellulose from Pinus nigra subsp. laricio and Pinus pinaster along an elevation gradient can be divided into four distinct patterns ((1) high values in the beginning of the tree ring, declining trend afterwards; (2) low values in the beginning, increasing trend afterwards; (3) high values in the middle of the tree ring; (4) declining trend over the whole tree ring). These patterns reflect the dependency on local site conditions and different water sources. Context: Intra-annual oxygen isotope chronologies from tree-ring cellulose can serve as a proxy for past climate conditions at inter- or even intra-seasonal resolution. Aims: We explore the potential of these chronologies from pine trees (Pinus nigra J.F. Arn subsp. laricio (Poiret) Maire var Corsicana Hyl. and Pinus pinaster Aiton) growing on the Mediterranean island of Corsica, France, along an elevation gradient ranging from sea level to 1600 m asl. Methods: We developed high-resolution intra-annual oxygen isotope chronologies from tree-ring cellulose of eight trees from five sites along the elevation gradient. The analysis period covers the decade 2007–2016 for seven trees and the period 1987–2016 for one tree, respectively. Results: The chronologies show a high variability between trees, sites, and years. We identified four different intra-annual oxygen isotope patterns which reflect the dependency of tree growth on different water sources (precipitation during the growing season vs. deeper soil water reservoirs) and climate conditions during the growth season. Trees at coastal sites have access to groundwater, while trees growing in high elevations mostly depend on precipitation during the growth season as water source. Conclusion: The different patterns can be attributed to the use of different water sources. The intra-annual chronology covering 30 years indicates an increasing frequency of dry-warm summers after 2007. Numéro de notice : A2019-304 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-019-0860-9 date de publication en ligne : 29/07/2019 En ligne : https://doi.org/10.1007/s13595-019-0860-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93237 [article]

Diversity of water use efficiency among Quercus robur genotypes: contribution of related leaf traits / Magali Roussel in Annals of Forest Science, Vol 66 n° 4 (June 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 4 (June 2009) . - n° 408 Titre : Diversity of water use efficiency among Quercus robur genotypes: contribution of related leaf traits Titre original : Diversité de l'efficience d'utilisation de l'eau entre différents génotypes de Quercus robur: contributions des traits foliaires Type de document : Article/Communication Auteurs : Magali Roussel, Auteur ; Didier Le Thiec, Auteur ; Pierre Montpied, Auteur ; Nathalie Ningre, Auteur ; Jean-Marc Guehl, Auteur ; Oliver Brendel, Auteur Année de publication : 2009 Article en page(s) : n° 408 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] carbone [Termes descripteurs IGN] génétique forestière [Termes descripteurs IGN] isotope [Termes descripteurs IGN] Quercus pedunculata Résumé : (auteur) Previously, a large intra-specific diversity and a tight genetic control have been shown for Δ13C (carbon isotope discrimination) in a pedunculate oak (Quercus robur L.) family, which is an estimator for intrinsic water use efficiency (Wi), a complex trait defined as the ratio of net CO2 assimilation rate (A) to stomatal conductance for water vapour (gs). In the present study, twelve genotypes with extreme phenotypic values of Δ13C were selected within this family to (i) asses the stability of genotype differences across contrasting environments and for different measures Wi; (ii) quantify the relationship between Δ13C and Wi within this family; (iii) identify which leaf traits drive the diversity in Wi observed in this family. Genetic variability of Δ13C and Wi was largely independent from different temporal integration scales and their correlation was found to be strong (R2 = 88% for leaf sugars) within this family. Weak correlations between measures of Wi with estimators of photosynthetic capacity, suggest a minor role of the latter in the diversity of Wi. However, the tight correlation between gs and Δ13C as well as Wi, and the related genotypic variation in stomatal density, suggest that the genotypic diversity in Wi within this pedunculate oak family might be due to differences in gs. Numéro de notice : A2009-656 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009010 date de publication en ligne : 06/05/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/04/f08120/f08120.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72242 [article]

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Forest floor contribution to phosphorus nutrition: experimental data / Laurent Augusto in Annals of Forest Science, Vol 66 n° 5 (July - August 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 5 (July - August 2009) . - n° 510 Titre : Forest floor contribution to phosphorus nutrition: experimental data Titre original : Contribution des couches holorganiques à la nutrition en phosphore : données expérimentales Type de document : Article/Communication Auteurs : Laurent Augusto, Auteur ; Christian Morel, Auteur ; David L. Achat, Auteur ; Etienne Saur, Auteur Année de publication : 2009 Article en page(s) : n° 510 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] isotope [Termes descripteurs IGN] litière [Termes descripteurs IGN] nutriment [Termes descripteurs IGN] phosphore [Termes descripteurs IGN] Pinus pinaster [Termes descripteurs IGN] teneur en phosphore [Termes IFN] podzol Résumé : (auteur) Although accumulation of decomposing litter temporarily removes nutrients from active circulation, it creates a medium that is more suitable for nutrient uptake where soil conditions are unfavorable. A pot experiment was conducted using labeling of isotopically exchangeable phosphate ions of the soil and applying the dilution principle to accurately assess the contribution of the forest floor to P nutrition of maritime pine seedlings (Pinus pinaster Aït.). Three-week-old maritime pine seedlings were planted in pots containing either mineral soil (MS) or mineral soil covered with a forest floor layer (MS+FF). After 130 d, P uptake was still insignificant in the MS treatment while the P content of the seedlings in the MS+FF treatment increased tenfold with respect to the initial P content. In the latter treatment, the forest floor contributed 99.1% of the P supply to pine seedlings. The higher P uptake from the forest floor than from the mineral soil may be explained by its lower ability to retain inorganic P, which enabled a higher concentration of inorganic P to be maintained in solution. Numéro de notice : A2009-644 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009039 date de publication en ligne : 09/07/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/05/f08410/f08410.html Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72468 [article]

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Genetic variation for carbon isotope composition in Juglans regia L.: relationships with growth, phenology and climate of origin / Neus Aletà in Annals of Forest Science, Vol 66 n° 4 (June 2009)  

Public [article]  inAnnals of Forest Science > Vol 66 n° 4 (June 2009) . - n° 413 Titre : Genetic variation for carbon isotope composition in Juglans regia L.: relationships with growth, phenology and climate of origin Titre original : Variation génétique de la composition isotopique du carbone chez Juglans regia L.: relations avec la croissance, la phénologie et le climat d'origine Type de document : Article/Communication Auteurs : Neus Aletà, Auteur ; Antoni Vilanova, Auteur ; Raquel Díaz, Auteur ; Jordi Voltas, Auteur Année de publication : 2009 Article en page(s) : n° 413 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation [Termes descripteurs IGN] climat méditerranéen [Termes descripteurs IGN] croissance végétale [Termes descripteurs IGN] isotope [Termes descripteurs IGN] Juglans regia [Termes descripteurs IGN] phénologie Résumé : (auteur) Among the traits of breeding interest for the common walnut tree Juglans regia L., characteristics such as timing of budbreak and leaf fall, water-use efficiency and growth performance are regarded as being of utmost relevance in Mediterranean conditions. The authors evaluated intraspecific variation in δ13C (carbon isotope composition, surrogate of intrinsic water-use efficiency, WUEi) for 22 J. regia families grown in a progeny test under supplementary irrigation, and investigated whether such variation correlated with climatic indicators of native habitats. The genetic relationships between δ13C, growth and phenology were also assessed during two consecutive years. Overall, the most water-use-efficient families (i.e. with higher δ13C), which originated mainly from drought-prone provenance regions which have a high vapour pressure deficit and low rainfall, exhibited less height growth and smaller DBH. Using a stepwise regression procedure, δ13C was included as the main explanatory variable of genotypic variation in growth traits, together with growing season duration (for DBH in both years) and flushing (for height in 2007). It was concluded that WUEi is largely unconnected to phenology effects in the explanation of growth performance for J. regia, therefore suggesting the opportunity of simultaneously selecting for low WUEi and extended growing period to maximise productivity in non-water-limited environments. Numéro de notice : A2009-701 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1051/forest/2009021 date de publication en ligne : 06/05/2009 En ligne : https://www.afs-journal.org/articles/forest/full_html/2009/04/f08294/f08294.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72247 [article]

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Rapports isotopiques dans le système solaire, Paris, 19-22 juin 1984 / Centre national d'études spatiales (1985)

Public Titre : Rapports isotopiques dans le système solaire, Paris, 19-22 juin 1984 Titre original : Isotopic ratios in the solar system, Paris, 19-22 June 1984 Type de document : Actes de congrès Auteurs : Centre national d'études spatiales, Auteur Congrès : CNES 1984, Isotopic ratios in the solar system (19 - 22 juin 1984; Paris, France), Auteur Editeur : Toulouse : Cépaduès Année de publication : 1985 Importance : 304 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-2-85428-133-0 Langues : Anglais (eng) Français (fre) Descripteur : [Vedettes matières IGN] Astrophysique [Termes descripteurs IGN] Big Bang [Termes descripteurs IGN] comète [Termes descripteurs IGN] composition chimique [Termes descripteurs IGN] cosmogonie [Termes descripteurs IGN] isotope [Termes descripteurs IGN] météorite [Termes descripteurs IGN] nébuleuse [Termes descripteurs IGN] planète [Termes descripteurs IGN] spectrométrie [Termes descripteurs IGN] système solaire [Termes descripteurs IGN] vent solaire Résumé : (Auteur) Ce colloque a mis en évidence la complémentarité des mesures de rapports isotopiques, in situ par moyens spatiaux, en laboratoire sur des météorites, des échantillons lunaires et la poussière interplanétaire, et à distance par mesure des spectres émis par les planètes géantes et les comètes. Les implications des résultats ont été discutées et c'est là l'originalité de ce colloque, tant dans le contexte de la formation des planètes à partir de la nébuleuse solaire primitive, que dans celui de la théorie du Big Bang de la formation de l'Univers. Une telle rencontre entre Planétologues et Astrophysiciens ne pouvait qu'être féconde. Note de contenu : SESSION I Ages d'exposition des météorites de fer : histoires multiples et variations d'intensité du rayonnement cosmique. Isotopes produced by galatic cosmic rays in iron meteorites. On the production rate of 21 Ne in ordinary chondrites Long-lived isotopes as indicators of the nature of the cretaceous-tertiary event experimental results on the uranium isotopic composition Extreme magnesium isotope fractionation in the Leoville meteorite Implications of Ti isotopic anomalies in meteorites Short-lived nuclides in the early solar system and general isotopic anomalies in meteorites Isotope abundance measurements of carbon, nitrogen and hydrogen in meteorites The distribution and isotopic composition of graphitic carbon in the early solar system Effet isotopique 12 C/ 13 C dans les chondrites carbonnées : essai d'interprétation en tenant compte de l'effet isotopique magnétique Noble gas anomalies in meteoritic and lunar samples and their chronological interpretation Trapped neon in ureilites - A new component The isotopic composition of neon emitted in solar flares and trapped in lunar soil minerals On the Xenon in acid-resistant residues of the Efremovka CV and Allende CV chondrites 36 Ar / 38 Ar ratios in selected meteorites 3 He /4 He ratio in diamonds and its application on the early history of the earth Anomalous 3 He / 4 He ratio in ocean sediments - Evidence for FCR cosmic dust fallout ? Origin of Neon-E SESSION II Isotopic ratios in comets Isotopic ratios in giant planets Gravitational settling in the jovian atmosphere ? L'abondance du deuterium dans le système solaire extérieur à partir de mesures du méthane deutère faites de la terre The D / H ratio in Saturn's atmosphere from Voyager Iris spectra Rapport 14 N / 15 N dans I'atmosphère de Jupiter Ion composition in the solar wind in relation to solar abundances Meteorites and comets - A study in relation to 12C / 13 C ratios SESSION III Solar isotopic ratios, chemical evolution of galaxies and cosmology L'abondance du lithium interstellaire et le rapport 7 Li / 6 Li Metal enrichment of stars in the Orion Complex and its relation with the formation of the solar system : preliminary results Destruction thermonucléaire du lithium, du beryllium et du bore à l'intérieur d'une étoile de 1 Mo Thermonuclear destruction of lithium, beryllium and boron inside a I M. star Interstellar nitrogen isotope ratios and the synthesis of 15 N Isotopic ratios of dense interstellar matter Isotopic anomalies in meteorites and nucleosynthesis (I) : a review for the nonradiogenic cases between carbon and silicon Element and isotope fractionation in the preplanetary nebula [H2 12CO] / [H2 13CO] ratios in the solar neighbourhood Numéro de notice : 16444 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=34808

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Atomes, molécules, noyaux / Jean-Paul Mathieu (1966)

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