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Les problèmes sanitaires d'actualité en hêtraie : la maladie du hêtre dans les Ardennes / Louis-Michel Nageleisen in Revue forestière française, vol 57 n° 2 (août 2005)
[article]
Titre : Les problèmes sanitaires d'actualité en hêtraie : la maladie du hêtre dans les Ardennes Type de document : Article/Communication Auteurs : Louis-Michel Nageleisen, Auteur ; Olivier Huart, Auteur Année de publication : 2005 Article en page(s) : pp 249 - 254 Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes IGN] Ardennes (08)
[Termes IGN] Belgique
[Termes IGN] bois sur pied
[Termes IGN] dépérissement
[Termes IGN] Fagus (genre)
[Termes IGN] Luxembourg
[Termes IGN] maladie phytosanitaire
[Termes IGN] Rhénanie-Palatinat (Allemagne)
[Termes IGN] Sarre (Allemagne)
[Termes IGN] Scolytinae
[Termes IGN] xylophage
[Vedettes matières IGN] Ecologie forestièreRésumé : (auteur) De 1999 à 2002, de très nombreux hêtres furent colonisés par des insectes xylophages dans les Ardennes essentiellement. Sur ces arbres, des suintements importants sur le fût, orientés en général du côté nord, ont pu être associés à une nécrose cambiale en bande. Après investigation, l'origine probable de cette nécrose semble être une chute de température brutale en novembre 1998, alors que les arbres n'étaient pas encore préparés aux froids hivernaux. Cette nécrose permet la colonisation par divers champignons lignivores qui dégradent rapidement le bois, induisant des pertes économiques considérables. Le phénomène lié à un événement climatique ponctuel est en voie de résorption cinq années après. Les insectes xylophages, parasites de faiblesse confirmés par les études réalisées, furent essentiellement opportunistes et attirés par les suintements. Numéro de notice : A2005-028 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.4267/2042/5040 En ligne : https://doi.org/10.4267/2042/5040 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82660
in Revue forestière française > vol 57 n° 2 (août 2005) . - pp 249 - 254[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 133-05021 RAB Revue Centre de documentation En réserve L003 Disponible IFN-001-P000466 PER Revue Nogent-sur-Vernisson Archives périodiques Exclu du prêt Analysis of land use drivers at the watershed and household level: Linking two paradigms at the Philippine forest fringe / K.P. Overmars in International journal of geographical information science IJGIS, vol 19 n° 2 (february 2005)
[article]
Titre : Analysis of land use drivers at the watershed and household level: Linking two paradigms at the Philippine forest fringe Type de document : Article/Communication Auteurs : K.P. Overmars, Auteur ; P.H. Verburg, Auteur Année de publication : 2005 Article en page(s) : pp 125 - 152 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse spatiale
[Termes IGN] bassin hydrographique
[Termes IGN] carte d'occupation du sol
[Termes IGN] changement d'occupation du sol
[Termes IGN] données localisées
[Termes IGN] données socio-économiques
[Termes IGN] géographie physique
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Terra-ASTER
[Termes IGN] maïs (céréale)
[Termes IGN] Manille (Philippines)
[Termes IGN] Musa (genre)
[Termes IGN] occupation du sol
[Termes IGN] régression
[Termes IGN] rizière
[Termes IGN] utilisation du sol
[Termes IGN] variableRésumé : (Auteur) Land use and land cover change (LUCC) is the result of the complex interactions between behavioural and structural factors (drivers) associated with the demand, technological capacity, social relations and the nature of the environment in question. Although no general theory of land use change exists, different disciplinary theories can help us to analyse aspects of LUCC in specific situations. However, paradigms and theories applied by the different disciplines are often difficult to integrate and their specific research results do not easily combine into an integrated understanding of LUCC. Geographical approaches often aim to identify the location of LUCC in a spatially explicit way, while socio-economic studies aim to understand the processes of LUCC, but often lack spatial context and interactions. The objective of this study is to integrate process information from a socioeconomic study into a geographical approach. First, a logistic regression analysis is performed on household survey data from interviews. In this approach the occurrence of the land use types corn, wet rice and banana is explained by a set of variables that are hypothesised to be explanatory for those land use types, with fields as the unit of analysis. The independent variables consist of household characteristics, like ethnicity and age, and plot and field information, like tenure, slope and travel time. The results of these analyses are used to identify key variables explaining land use choice, which subsequently are also collected at watershed level, using maps, census data and remote sensing imagery. Logistic regression analysis of this spatial dataset, where a ten percent sample of a 50 by 50 m grid was analysed, shows that the key variables identified in the household analysis are also important at the watershed level. Important drivers in the study area are, among others, slope, ethnicity, accessibility and place of birth. The differences in the contribution of the variables to the models at household and watershed level can be attributed to differences in spatial extent and data representation. Comparing the model with a mainstream geographical approach indicates that the spatial model informed by the household analysis gives a better insight in the actual processes determining land use than the mainstream geographic approach. Numéro de notice : A2005-045 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001713380 En ligne : https://doi.org/10.1080/13658810410001713380 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27183
in International journal of geographical information science IJGIS > vol 19 n° 2 (february 2005) . - pp 125 - 152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-05021 RAB Revue Centre de documentation En réserve L003 Disponible 079-05022 RAB Revue Centre de documentation En réserve L003 Disponible Land cover-based optimal deconvolution of PALS L-band microwave brightness temperatures / A.S. Limaye in Remote sensing of environment, vol 92 n° 4 (30 September 2004)
[article]
Titre : Land cover-based optimal deconvolution of PALS L-band microwave brightness temperatures Type de document : Article/Communication Auteurs : A.S. Limaye, Auteur ; William L. Crosson, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 497 - 506 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] agriculture
[Termes IGN] biomasse
[Termes IGN] capteur actif
[Termes IGN] capteur passif
[Termes IGN] déconvolution
[Termes IGN] Glycine max
[Termes IGN] Iowa (Etats-Unis)
[Termes IGN] luminance lumineuse
[Termes IGN] maïs (céréale)
[Termes IGN] Passive and Active L and S band Sensor
[Termes IGN] Soil Moisture Experiment
[Termes IGN] température de luminanceRésumé : (Auteur) An optimal deconvolution (ODC) technique has been developed to estimate microwave brightness temperatures of agricultural fields using microwave radiometer observations. The technique is applied to airborne measurements taken by the Passive and Active L and S band (PALS) sensor in Iowa during Soil Moisture Experiments in 2002 (SMEX02). Agricultural fields in the study area were predominantly soybeans and corn. The brightness temperatures of corn and soybeans were observed to be significantly different because of large differences in vegetation biomass. PALS observations have significant over-sampling; observations were made about 100 m apart and the sensor footprint extends to about 400 m. Conventionally, observations of this type are averaged to produce smooth spatial data fields of brightness temperatures. However, the conventional approach is in contrast to reality in which the brightness temperatures are in fact strongly dependent on land cover, which is characterized by sharp boundaries. In this study, we mathematically deconvolve the observations into brightness temperature at the field scale (500-800 m) using the sensor antenna response function. The result is more accurate spatial representation of field-scale brightness temperatures, which may in turn lead to more accurate soil moisture retrieval. Numéro de notice : A2004-415 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.02.019 En ligne : https://doi.org/10.1016/j.rse.2004.02.019 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26942
in Remote sensing of environment > vol 92 n° 4 (30 September 2004) . - pp 497 - 506[article]Retrieval of soil moisture from passive and active L/S band sensor (PALS) observations during the soil moisture experiment in 2002 (SMEX) / U. Narayan in Remote sensing of environment, vol 92 n° 4 (30 September 2004)
[article]
Titre : Retrieval of soil moisture from passive and active L/S band sensor (PALS) observations during the soil moisture experiment in 2002 (SMEX) Type de document : Article/Communication Auteurs : U. Narayan, Auteur ; V. Lakshmi, Auteur ; E. Njoku, Auteur Année de publication : 2004 Article en page(s) : pp 483 - 496 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bande L
[Termes IGN] bande S
[Termes IGN] bande spectrale
[Termes IGN] capteur actif
[Termes IGN] capteur passif
[Termes IGN] Glycine max
[Termes IGN] humidité du sol
[Termes IGN] Iowa (Etats-Unis)
[Termes IGN] maïs (céréale)
[Termes IGN] Passive and Active L and S band Sensor
[Termes IGN] régression
[Termes IGN] Soil Moisture Experiment
[Termes IGN] teneur en eau de la végétation
[Termes IGN] transfert radiatifRésumé : (Auteur) The Soil Moisture Experiments in 2002 (SMEX02) were conducted in Iowa between June 25th and July 12th, 2002. A major aim of the experiments was examination of existing algorithms for soil moisture retrieval from active and passive microwave remote sensors under high vegetation water content conditions. The data obtained from the passive and active L and S band sensor (PALS) along with physical variables measured by in situ sampling have been used in this study to demonstrate the sensitivity of the instrument to soil moisture and perform soil moisture retrieval using statistical regression and physical modeling techniques. The land cover conditions in the region studied were predominantly soybean and corn crops with average vegetation water contents ranging from 0 to ~ 5 kg/m2. The PALS microwave sensitivity to soil moisture under these vegetation conditions was investigated for both passive and active measurements. The performance of the PALS instrument and retrieval algorithms has been analyzed, indicating soil moisture retrieval errors of approximately 0.04 g/g gravimetric soil moisture. Statistical regression techniques have been shown to perform satisfactorily with soil moisture retrieval error of around 0.05 g/g gravimetric soil moisture. The retrieval errors were higher for the corn than for the soybean fields due to the higher vegetation water content of the corn crops. However, the algorithms performed satisfactorily over the full range of vegetation conditions. Numéro de notice : A2004-414 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.05.018 En ligne : https://doi.org/10.1016/j.rse.2004.05.018 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26941
in Remote sensing of environment > vol 92 n° 4 (30 September 2004) . - pp 483 - 496[article]Hyperspectral vegetation indices and novel algorithms for predicting green LAI of crop canopies: modelling and validation in the context of precision agriculture / D. Haboudane in Remote sensing of environment, vol 90 n° 3 (15/04/2004)
[article]
Titre : Hyperspectral vegetation indices and novel algorithms for predicting green LAI of crop canopies: modelling and validation in the context of precision agriculture Type de document : Article/Communication Auteurs : D. Haboudane, Auteur ; J.R. Miller, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 337 - 352 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] agriculture de précision
[Termes IGN] analyse comparative
[Termes IGN] blé (céréale)
[Termes IGN] chlorophylle
[Termes IGN] cultures
[Termes IGN] données de terrain
[Termes IGN] Glycine max
[Termes IGN] Green Leaf Area Index
[Termes IGN] image CASI
[Termes IGN] image hyperspectrale
[Termes IGN] indice de végétation
[Termes IGN] maïs (céréale)
[Termes IGN] modèle de transfert radiatif
[Termes IGN] prévision
[Termes IGN] réflectance végétaleRésumé : (Auteur) A growing number of studies have focused on evaluating spectral indices in terms of their sensitivity to vegetation biophysical parameters, as well as to external factors affecting canopy reflectance. In this context, leaf and canopy radiative transfer models are valuable for modeling and understanding the behavior of such indices. In the present work, PROSPECT and SAILH models have been used to simulate a wide range of crop canopy reflectances in an attempt to study the sensitivity of a set of vegetation indices to green leaf area index (LAI), and to modify some of them in order to enhance their responsivity to LAI variations. The aim of the paper was to present a method for minimizing the effect of leaf chlorophyll content on the prediction of green LAI, and to develop new algorithms that adequately predict the LAI of crop canopies. Analyses based on both simulated and real hyperspectral data were carried out to compare performances of existing vegetation indices (Normalized Difference Vegetation Index [NDVI], Renormalized Difference Vegetation Index [RDVI], Modified Simple Ratio [MSR], Soil-Adjusted Vegetation Index [SAVI], Soil and Atmospherically Resistant Vegetation Index [SARVI], MSAVI, Triangular Vegetation Index [TVI], and Modified Chlorophyll Absorption Ratio Index [MCARI]) and to design new ones (MTVII, MCARII, MTV12, and MCAR12) that are both less sensitive to chlorophyll content variations and linearly related to green LAI. Thorough analyses showed that the above existing vegetation indices were either sensitive to chlorophyll concentration changes or affected by saturation at high LAI levels. Conversely, two of the spectral indices developed as a part of this study, a modified triangular vegetation index (MTV12) and a modified chlorophyll absorption ratio index (MCAR12), proved to be the best predictors of green LAI. Related predictive algorithms were tested on CASI (Compact Airborne Spectrographic Imager) hyperspectral images and, then, validated using ground truth measurements. The latter were collected simultaneously with image acquisition for different crop types (soybean, corn, and wheat), at different growth stages, and under various fertilization treatments. Prediction power analysis of proposed algorithms based on MCAR12 and MTV12 resulted in agreements between modeled and ground measurement of non-destructive LAI, with coefficients of determination (r) being 0.98 for soybean, 0.89 for com, and 0.74 for wheat. The corresponding RMSE for LAI were estimated at 0.28, 0.46, and 0.85, respectively. Numéro de notice : A2004-201 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2003.12.013 En ligne : https://doi.org/10.1016/j.rse.2003.12.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26728
in Remote sensing of environment > vol 90 n° 3 (15/04/2004) . - pp 337 - 352[article]The spatial distribution of indigenous forest and its composition in the Wellington region, New Zealand, from ETM+ satellite imagery / J.R. Dymond in Remote sensing of environment, vol 90 n° 1 (15/03/2004)PermalinkA contribution to the knowledge of the order Quercetalia ilicis Br.-Bl. ex Molinier 1934 of Sardinia / G. Bacchetta in Fitosociologia, vol 41 n° 1 (2004)PermalinkInventaire et suivi des zones humides par télédétection / L. Puente (2004)PermalinkSyntaxonomical revision of Quercetalia pubescenti-petraeae in the Italian Peninsula / C. Blasi in Fitosociologia, vol 41 n° 1 (2004)PermalinkTowards an operational system for regional-scale rice yield estimation using a time-series of Radarsat ScanSAR images / Y. Li in International Journal of Remote Sensing IJRS, vol 24 n° 21 (November 2003)PermalinkValeur phytoécologique et biologique des ripisylves méditerranéennes / Pierre Quézel in Forêt méditerranéenne, vol 24 n° 3 (septembre 2003)Permalinkn° 1 - août 2003 - [en ligne] Dossier : Stockage du bois de hêtre (Bulletin de Rendez-vous techniques)PermalinkComptage automatique d'oliviers par traitement d'images satellites [très] haute résolution / Anaïs Hyenne (2003)PermalinkContribution to the syntaxonomic knowledge of the Quercus ilex L. woods of the Central European Mediterranean Basin / Edoardo Biondi in Fitosociologia, vol 40 n° 1 (2003)PermalinkDatos sobre la vegetación de la clase Quercetea ilicis en Cerdeña / Salvador Rivas-Martinez in Fitosociologia, vol 40 n° 1 (2003)PermalinkLeaf morphological differentiation between Quercus robur and Quercus petraea is stable across western European mixed oak stands / Antoine Kremer in Annals of Forest Science, vol 59 n° 7 (novembre 2002)PermalinkLandscape dynamics of the spread of sudden oak death / M. Kelly in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)PermalinkImprovement of an oak canopy model extracted from digital photogrammetry / P. Gong in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 9 (September 2002)PermalinkGestion intégrée de la chênaie verte méditerranéenne : Application à deux massifs de la région Languedoc-Roussillon / Georges de Maupeou in Revue forestière française, vol 54 n° 1 (janvier - février 2002)PermalinkPropositions pour la mise en place d'un référentiel géomatique intégrant des indicateurs agro-environnementaux en appui à la traçabilité agricole / Isabelle Klein (2002)PermalinkDevelopment of daily spatial heat unit mapping from monthly climatic surfaces for the Australian continent / Nicholas C. Coops in International journal of geographical information science IJGIS, vol 15 n° 4 (june 2001)PermalinkMise en place d'une base de données parcellaires à la Direction de l'Agriculture et de la Forêt de la Réunion / Pierre Tessier (2001)PermalinkUtilisation des données de télédétection haute résolution pour la caractérisation agronomique de plantations industrielles de palmiers à huile / Vincent Abt (2001)PermalinkPourquoi pas une sylviculture "douce" pour le peuplier ? / Bernard Rérat in Forêts de France, n° 438 (novembre 2000)PermalinkL'aulne glutineux en Champagne-Ardenne / Sylvain Gaudin in Forêts de France, n° 434 (juin 2000)Permalink