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L'échelle nanométrique pour comprendre les fonctions du bois dans l'arbre / Pascale Mollier in INRA magazine, n° 7 (janvier 2009)
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Titre : L'échelle nanométrique pour comprendre les fonctions du bois dans l'arbre Type de document : Article/Communication Auteurs : Pascale Mollier, Auteur Année de publication : 2009 Article en page(s) : p. 8-9 Langues : Français (fre) Descripteur : [Termes IGN] bois
[Termes IGN] sèveRésumé : (éditeur) Si les arbres peuvent dépasser 100 mètres de haut, il est cependant nécessaire de recourir à l'échelle nanométrique (entre 1 et 100 nanomètres) pour comprendre certaines de leurs propriétés. A cette échelle, les chercheurs de l’Inra de Nancy étudient comment les macromolécules de la paroi cellulaire (celluloses, hémicelluloses, lignines) s’associent en structures spécialisées pour former les parois, puis les pores cellulaires. Les premières interviennent dans le soutien mécanique, tandis que les seconds permettent la circulation de la sève brute. Numéro de notice : IFN_2810 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : sans En ligne : http://pmb.ifn.fr/doc_num.php?explnum_id=75 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71665
in INRA magazine > n° 7 (janvier 2009) . - p. 8-9[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000278 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt Frost damage in Pinus sylvestris L. stems assessed by chlorophyll fluorescence in cortical bark chlorenchyma / José Javier Peguero-Pina in Annals of Forest Science, Vol 65 n° 8 (December 2008)
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Titre : Frost damage in Pinus sylvestris L. stems assessed by chlorophyll fluorescence in cortical bark chlorenchyma Titre original : Évaluation des dégâts du froid dans les troncs de Pinus sylvestris L. par la mesure de la fluorescence de la chlorophylle dans le chlorenchyme cortical de l'écorce Type de document : Article/Communication Auteurs : José Javier Peguero-Pina, Auteur ; Fermín Morales, Auteur ; Eustaquio Gil-Pelegrín, Auteur Année de publication : 2008 Article en page(s) : n° 813 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] chlorophylle
[Termes IGN] climat froid
[Termes IGN] dommage forestier causé par facteurs naturels
[Termes IGN] Espagne
[Termes IGN] fluorescence
[Termes IGN] Pinus sylvestrisRésumé : (auteur) Several techniques were used to investigate the threshold minimum temperature inducing severe frost damage during winter in Scots pine (Pinus sylvestris L.) needles and stems from southern provenances in the Iberian Peninsula. Chlorophyll (Chl) fluorescence, electrolyte leakage (EL), visual scoring (VS), and the normalized difference vegetation index (NDVI) were compared. Chl fluorescence, and in particular the maximum potential photosystem II (PSII) efficiency – estimated through the dark-acclimated Fv/Fm ratio -, was found to be a simple, non-destructive indicator of freezing tolerance in needles, as expected. Moreover, the existence of a Chl-containing tissue, the cortical bark chlorenchyma, allowed us the use of Chl fluorescence as a new non-destructive indicator of frost damage in live tissues of Pinus sylvestris L. stems.F reezing tolerance values of southern provenances are compared with those found by other authors in the northern distribution limit of the species. Note de contenu : Résumés en anglais et français. Bibliogr. Numéro de notice : A2008-687 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2008068 Date de publication en ligne : 04/12/2008 En ligne : https://www.afs-journal.org/articles/forest/abs/2008/08/f08174/f08174.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71564
in Annals of Forest Science > Vol 65 n° 8 (December 2008) . - n° 813[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000261 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt Manipulating nutrient and water availability in a maritime pine plantation: effects on growth, production, and biomass allocation at canopy closure / Pierre Trichet in Annals of Forest Science, Vol 65 n° 8 (December 2008)
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Titre : Manipulating nutrient and water availability in a maritime pine plantation: effects on growth, production, and biomass allocation at canopy closure Titre original : Manipulation de la disponibilité en eau et éléments minéraux dans une plantation de pins maritimes : effet sur la croissance, la production, l'allocation de la biomasse à la fermeture du couvert Type de document : Article/Communication Auteurs : Pierre Trichet, Auteur ; Denis Loustau, Auteur ; Catherine Lambrot, Auteur ; Sune Linder, Auteur Année de publication : 2008 Article en page(s) : n° 814 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] biomasse
[Termes IGN] croissance des arbres
[Termes IGN] indice foliaire
[Termes IGN] irrigation
[Termes IGN] Leaf Area Index
[Termes IGN] nutrition végétale
[Termes IGN] phytobiologie
[Termes IGN] Pinus pinaster
[Termes IGN] plantation forestière
[Termes IGN] production primaire brute
[Termes IGN] tempête
[Vedettes matières IGN] BotaniqueRésumé : (auteur) We present here the results of a water and nutrient manipulation experiment in a five-year-old plantation of maritime pine in south-western France. $\bullet$ Water and nutrient levels were manipulated in a factorial design with two levels of irrigation (control receiving only rainfall (C) and irrigated (I)) and three levels of fertilisation (control with no added nutrients (C), P-only (P) and annual addition of a complete nutrient mix (F)) in order to quantify growth limitations of plantation forest in this particular area. The treatments applied during five years increased aboveground biomass annual increment by 4% (I) to 58% (IF) with respect to the control (C). The fertilised plots had a slightly non-significant lower root-to-shoot ratio. The effect of irrigation was maximal in 2002, resulting in 6%, 7% and 12% higher growth rate on the F, C and P plots, respectively. A windstorm disturbed the experiment in 1999 and has affected preferentially the fertilised plots, with IF plots displaying 60% damage. The higher growth rate of fertilised and irrigated plots was attributed to both an increase (estimated at 5 to 15%) in the amount of light absorbed by the canopy, and an increase (estimated at 26% for IF plots) in the amount of above-ground biomass produced annually per unit leaf area. Note de contenu : Résumés en anglais et français. Bibliogr. Annexe. Numéro de notice : A2008-688 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1051/forest:2008060 Date de publication en ligne : 04/12/2008 En ligne : https://www.afs-journal.org/articles/forest/abs/2008/08/f07206/f07206.html Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=71565
in Annals of Forest Science > Vol 65 n° 8 (December 2008) . - n° 814[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-DIR-P000261 PER Revue Nogent-sur-Vernisson Salle périodiques Exclu du prêt Impact of nutrient removal through harvesting on the sustainability of the boreal forest / Louis Duchesne in Ecological Applications, vol 18 n° 7 (October 2008)
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Titre : Impact of nutrient removal through harvesting on the sustainability of the boreal forest Type de document : Article/Communication Auteurs : Louis Duchesne, Auteur ; Daniel Houle, Auteur Année de publication : 2008 Article en page(s) : pp 1642 - 1651 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] acidification des sols
[Termes IGN] forêt boréale
[Termes IGN] gestion forestière durable
[Termes IGN] nutriment végétal
[Termes IGN] sol acideRésumé : (auteur) The cycling of base cations (K, Ca, Mg, and Na) was investigated in a boreal balsam fir forest (the Lake Laflamme Watershed) between 1999 and 2005. Base cation budgets were calculated for the soil rooting zone that included atmospheric deposition and soil leaching losses, two scenarios of tree uptake (whole-tree and stem-only harvesting), and three scenarios of mineral weathering, leading to six different scenarios. In every scenario there was a net accumulation of Mg within the soil exchangeable reservoir, while Ca accumulated in four scenarios. Potassium was lost in five of the six scenarios. Contrary to Ca and Mg, immobilization of K within tree biomass (69 mol·ha−1·yr−1) was the main pathway of K losses from the soil exchangeable reservoir, being five times higher than losses via soil leaching (14 mol·ha−1·yr−1). The amounts of K contained within the aboveground biomass and the exchangeable soil reservoir were 3.3 kmol/ha and 4.2 kmol/ha, respectively. Whole-tree harvesting may thus remove 44% of the K that is readily available for cycling in the short term, making this forest sensitive to commercial forestry operations. Similar values of annual K uptake as well as a similar distribution of K between tree biomass and soil exchangeable reservoirs at 14 other coniferous sites, distributed throughout the boreal forest of Québec, suggest that the Lake Laflamme Watershed results can be extrapolated to a much larger area. Stem-only harvesting, which would reduce K exports due to biomass removal by 60%, should be used for these types of forest. Numéro de notice : A2008-665 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1890/07-1035.1 En ligne : https://doi.org/10.1890/07-1035.1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88991
in Ecological Applications > vol 18 n° 7 (October 2008) . - pp 1642 - 1651[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité IFN-001-000244 423 DUC Tiré à part Nogent-sur-Vernisson Bibliothèque Nogent IFN Exclu du prêt Monitoring herbaceaous fuel moisture content with Spot-Vegetation times-series for fire risk prediction in savanna ecosystems / Jan Verbesselt in Remote sensing of environment, vol 108 n° 4 (29 June 2007)
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Titre : Monitoring herbaceaous fuel moisture content with Spot-Vegetation times-series for fire risk prediction in savanna ecosystems Type de document : Article/Communication Auteurs : Jan Verbesselt, Auteur ; B. Somers, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 357 - 368 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse diachronique
[Termes IGN] combustible
[Termes IGN] herbe
[Termes IGN] image SPOT-Végétation
[Termes IGN] indice de végétation
[Termes IGN] prévention des risques
[Termes IGN] risque naturel
[Termes IGN] savane
[Termes IGN] surveillance écologique
[Termes IGN] teneur en eau de la végétationRésumé : (Auteur) This paper evaluated the capacity of SPOT VEGETATION time-series to monitor herbaceous fuel moisture content (FMC) in order to improve fire risk assessment in the savanna ecosystem of Kruger National Park in South Africa. In situ herbaceous FMC data were used to assess the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Vegetation Dryness Index (VDI), Improved VDI (IVDI), and Accumulated Relative NDVI Decrement (ARND) during the dry season. The effect of increasing amounts of dead vegetation on the monitoring capacity of derived indices was studied by sampling mixed live and dead FMC. The IVDI was proposed as an improvement of the VDI to monitor herbaceous FMC during the dry season. The IVDI is derived by replacing NDVI with the integrated Relative Vegetation Index (iRVI), as an approximation of yearly herbaceous biomass, when analyzing the 2-dimensional space with NDWI. It was shown that the iRVI offered more information than the NDVI in combination with NDWI to monitor FMC. The VDI and IVDI exhibited a significant relation to FMC with R2 of 0.25 and 0.73, respectively. The NDWI, however, correlated best with FMC (R2 = 0.75), while the correlation of ARND and FMC was weaker (R2 = 0.60) than that found for NDVI, NDWI, and IVDI. The use of in situ herbaceous FMC consequently indicated that NDWI is appropriate as spatio-temporal information source of herbaceous FMC variation which can be used to optimize fire risk and behavior assessment for fire management in savanna ecosystems. Copyright Elsevier Numéro de notice : A2007-299 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.11.019 En ligne : https://doi.org/10.1016/j.rse.2006.11.019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28662
in Remote sensing of environment > vol 108 n° 4 (29 June 2007) . - pp 357 - 368[article]Wavelet decomposition of hyperspectral data: a novel approach to quantifying pigment concentrations in vegetation / G. Blackburn in International Journal of Remote Sensing IJRS, vol 28 n°11-12 (June 2007)PermalinkExtending the MODIS 1 km ocean colour atmospheric correction to the MODIS 500 m bands and 500 m chlorophyll-a estimation towards coastal and estuarine monitoring / J.D. Shutler in Remote sensing of environment, vol 107 n° 4 (30/04/2007)PermalinkA new algorithm for estimating chlorophyll-a concentration from multi-spectral satellite data in case 2 waters: a simulation based on a controlled laboratory experiment / Y. Oyoma in International Journal of Remote Sensing IJRS, vol 28 n°7-8 (April 2007)PermalinkRegional products for the Baltic Sea using MERIS data / H. Krawczyk in International Journal of Remote Sensing IJRS, vol 28 n°3-4 (February 2007)PermalinkNeural network estimation of LAI, fAPAR, fCover and LAI*Cab, from top of canopy MERIS reflectance data: principles and validation / Cédric Bacour in Remote sensing of environment, vol 105 n° 4 (30/12/2006)PermalinkEvaluating temporal variability in the spectral reflectance response of annual ryegrass to changes in nitrogen applications and leaching fractions / M. Baghzouz in International Journal of Remote Sensing IJRS, vol 27 n°18 - 19 - 20 (October 2006)PermalinkRelationship between herbicide concentration during the 1960s and 1970s and the contemporary MERIS terrestrial chlorophyll index (MTCI) for southern Vietnam / J. Dash in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)PermalinkBase cation cycling in a pristine watershed of the Canadian boreal forest / Louis Duchesne in Biogeochemistry, vol 78 n° 2 (April 2006)PermalinkDynamique urbaine et télédétection : le choix de l'indicateur végétal, les cas de Montréal, Paris et Pékin / I. Biraud-Burot in Photo interprétation, vol 41 n° 4 (Novembre 2005)PermalinkMarine GIS: identification of mesoscale oceanic thermal fronts / V.D. Valavanis in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)Permalink