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Assessing changes in species distribution from sequential large-scale forest inventories / Laura Hernandez in Annals of Forest Science, vol 71 n° 2 (March 2014)
[article]
Titre : Assessing changes in species distribution from sequential large-scale forest inventories Type de document : Article/Communication Auteurs : Laura Hernandez, Auteur ; Isabel Canellas, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 161 - 171 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] changement climatique
[Termes IGN] Espagne
[Termes IGN] espèce végétale
[Termes IGN] estimation statistique
[Termes IGN] inventaire forestier étranger (données)
[Termes IGN] phytogéographie
[Termes IGN] Pyrénées (montagne)
[Termes IGN] répartition géographiqueRésumé : (Auteur) Context: It is assumed that global change is already affecting the composition, structure and distribution of forest ecosystems; however, detailed evidences of altitudinal and latitudinal shifts are still scarce. • Aims: To develop a method based on National Forest Inventory (NFI) to assess spatio-temporal changes in species distributions. • Methods: We develop an approach based on universal kriging to compare species distribution models from the different NFI cycles and regardless of the differences in the sampling schemes used. Furthermore, a confidence interval approach is used to assess significant changes in species distribution. The approach is applied to some of the southernmost populations of Pinus sylvestris and Fagus sylvatica in the Western Pyrenees over the last 40 years. • Results: An increase of the presence of the two species in the region was observed. Scots pine distribution has shifted about 1.5 km northwards over recent decades, whereas the European beech has extended its distribution southwards by about 2 km. Furthermore, the optimum altitude for both species has risen by about 200 m. As a result, the zone in which the two species coexist has been enlarged. • Conclusions: This approach provides a useful tool to compare NFI data from different sampling schemes, quantifying and testing significant shifts in tree species distribution over recent decades across geographical gradients. Numéro de notice : A2014-050 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s13595-013-0308-6 Date de publication en ligne : 12/07/2013 En ligne : https://doi.org/10.1007/s13595-013-0308-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32955
in Annals of Forest Science > vol 71 n° 2 (March 2014) . - pp 161 - 171[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 016-2014021 SL Revue Centre de documentation Revues en salle Disponible The co-evolution of residential segregation and the built environment at the turn of the 20th century: A Schelling model / Seth Spielman in Transactions in GIS, vol 18 n° 1 (February 2014)
[article]
Titre : The co-evolution of residential segregation and the built environment at the turn of the 20th century: A Schelling model Type de document : Article/Communication Auteurs : Seth Spielman, Auteur ; Patrick Harrison, Auteur Année de publication : 2014 Article en page(s) : pp 25 - 45 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] changement d'occupation du sol
[Termes IGN] environnement
[Termes IGN] Etats-Unis
[Termes IGN] habitat urbain
[Termes IGN] histoire
[Termes IGN] modélisation
[Termes IGN] New Jersey (Etats-Unis)
[Termes IGN] population urbaine
[Termes IGN] répartition géographique
[Termes IGN] système d'information géographique
[Termes IGN] villeRésumé : (Auteur) To what degree does the built environment of cities shape the social environment? In this article we use a Schelling-like agent-based model to consider how changes to the built environment of cities relate to changes in residential segregation by income and ethnicity. To develop this model we exploit insights from a high resolution historical GIS which maps 100% of the population of Newark, NJ in 1880. Newark in 1880 had a complex social landscape characterized by areas of significant social and economic segregation and areas of relative integration. We develop a Schelling model capable of reproducing these residential patterns. We use this model to explore the decentralization of housing, a specific phenomenon associated with the demise of the walking city in the late 19th century. Holding agent preferences constant, but allowing the landscape of the Schelling model to evolve in ways that reflect historical changes to the built environment, produces changes to the social landscape that are also consistent with history. Our work suggests that changes in residential segregation do not necessarily imply changes to individual attitudes and preferences. Changes in residential segregation can be generated by changes to the built environment, specifically the geographic distribution of housing. Numéro de notice : A2014-064 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12014 Date de publication en ligne : 05/02/2013 En ligne : https://doi.org/10.1111/tgis.12014 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32969
in Transactions in GIS > vol 18 n° 1 (February 2014) . - pp 25 - 45[article]Mapping a priori defined plant associations using remotely sensed vegetation characteristics / Hans D. Rölofsen in Remote sensing of environment, vol 140 (January 2014)
[article]
Titre : Mapping a priori defined plant associations using remotely sensed vegetation characteristics Type de document : Article/Communication Auteurs : Hans D. Rölofsen, Auteur ; Lammert Kooistra, Auteur ; Peter M. van Bodegom, Auteur ; Jochem Verrelst, Auteur ; Johan Krol, Auteur ; Jan-Philip M. Witte, Auteur Année de publication : 2014 Article en page(s) : pp 639 - 651 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] caractérisation
[Termes IGN] classification
[Termes IGN] humidité du sol
[Termes IGN] image aérienne
[Termes IGN] image multibande
[Termes IGN] nutriment végétal
[Termes IGN] Pays-Bas
[Termes IGN] phytosociologie
[Termes IGN] placette d'échantillonnage
[Termes IGN] répartition géographique
[Termes IGN] salinité
[Vedettes matières IGN] Ecologie forestièreRésumé : (auteur) Incorporation of a priori defined plant associations into remote sensing products is a major challenge that has only recently been confronted by the remote sensing community. We present an approach to map the spatial distribution of such associations by using plant indicator values (IVs) for salinity, moisture and nutrients as an intermediate between spectral reflectance and association occurrences. For a 12 km2 study site in the Netherlands, the relations between observed IVs at local vegetation plots and visible and near-infrared (VNIR) and short-wave infrared (SWIR) airborne reflectance data were modelled using Gaussian Process Regression (GPR) (R2 0.73, 0.64 and 0.76 for salinity, moisture and nutrients, respectively). These relations were applied to map IVs for the complete study site. Association occurrence probabilities were modelled as function of IVs using a large database of vegetation plots with known association and IVs. Using the mapped IVs, we calculated occurrence probabilities of 19 associations for each pixel, resulting in both a crisp association map with the most likely occurring association per pixel, as well as occurrence probability maps per association. Association occurrence predictions were assessed by a local vegetation expert, which revealed that the occurrences of associations situated at frequently predicted indicator value combinations were over predicted. This seems primarily due to biases in the GPR predicted IVs, resulting in associations with envelopes located in extreme ends of IVs being scarcely predicted. Although the results of this particular study were not fully satisfactory, the method potentially offers several advantages compared to current vegetation classification techniques, like site-independent calibration of association probabilities, site-independent selection of associations and the provision of IV maps and occurrence probabilities per association. If the prediction of IVs can be improved, this method may thus provide a viable roadmap to bring a priori defined plant associations into the domain of remote sensing. Numéro de notice : A2014-796 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2013.09.030 En ligne : https://doi.org/10.1016/j.rse.2013.09.030 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81015
in Remote sensing of environment > vol 140 (January 2014) . - pp 639 - 651[article]Paysans et pasteurs sur les marches du Levant Sud / Claudine Dauphin in Géomatique expert, n° 95 (01/11/2013)
[article]
Titre : Paysans et pasteurs sur les marches du Levant Sud Type de document : Article/Communication Auteurs : Claudine Dauphin, Auteur ; Mohamed Ben Jeddou, Auteur ; Jean-Marie Castex, Auteur Année de publication : 2013 Article en page(s) : pp 30 - 53 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse diachronique
[Termes IGN] base de données localisées
[Termes IGN] densité de population
[Termes IGN] désert
[Termes IGN] données démographiques
[Termes IGN] données environnementales
[Termes IGN] données spatiotemporelles
[Termes IGN] fouille archéologique
[Termes IGN] histoire
[Termes IGN] Jordanie
[Termes IGN] Levant
[Termes IGN] migration humaine
[Termes IGN] modèle dynamique
[Termes IGN] nomadisme
[Termes IGN] Palestine
[Termes IGN] répartition géographique
[Termes IGN] site archéologique
[Termes IGN] surface cultivée
[Termes IGN] système d'information géographique
[Termes IGN] voie antiqueRésumé : (Auteur) Entre la côte méditerranéenne de la Palestine et l'immense désert de la Transjordanie du Sud s'étend une vaste zone-tampon semi-aride. Bissectée par la faille du Jourdain (Ghôr), cette zone de transition entre désert et terres arables, entre climats subtropical méditerranéen et continental aride, fut sujette à divers modes d'interaction entre paysans et pasteurs du crépuscule de l'empire byzantin (fin du VIe siècle et début du VIIe siècle) au sultanat mamelouk (VIe-XVIe siècle) : sédentarisme, infiltration nomade, semi-sédentarisme, sédentarisation, retour au nomadisme et installation temporaire dans le cadre du pèlerinage à La Mecque. Associant SIG et interprétation traditionnelle archéo-historique du passé, notre nouvelle approche géo-spatiale révèle, sur dix siècles, les fluctuations de la dynamique du peuplement de la Palestine et de la Transjordanie méridionales et décèle les changements dans les paysages de terres arables et de désert. Nous présentons ici les avancées depuis 2011 du projet "Sédentaires et nomades", et en particulier, les résultats des analyses statistiques et spatiales à la lumière des fractures historiques du Levant Sud de la Conquête musulmane à l'émergence des Mamelouks. Numéro de notice : A2013-655 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32791
in Géomatique expert > n° 95 (01/11/2013) . - pp 30 - 53[article]Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 265-2013061 RAB Revue Centre de documentation En réserve L003 Disponible IFN-001-P001517 PER Revue Nogent-sur-Vernisson Salle périodiques Disponible Soil water balance performs better than climatic water variables in tree species distribution modelling / Christian Piedallu in Global ecology and biogeography, vol 22 n° 4 (April 2013)
[article]
Titre : Soil water balance performs better than climatic water variables in tree species distribution modelling Type de document : Article/Communication Auteurs : Christian Piedallu, Auteur ; Jean-Claude Gégout, Auteur ; Vincent Perez, Auteur ; François Lebourgeois, Auteur Année de publication : 2013 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] bilan hydrique
[Termes IGN] biogéographie
[Termes IGN] carte pédologique
[Termes IGN] changement climatique
[Termes IGN] espèce végétale
[Termes IGN] phytogéographie
[Termes IGN] Quercus pedunculata
[Termes IGN] Quercus pubescens
[Termes IGN] répartition géographique
[Termes IGN] système d'information géographiqueRésumé : (auteur) Aim: Soil water is essential for the physiological processes of plant growth and fitness. Owing to the difficulty of assessing wide variations in soil water reserves, plant distribution models usually estimate available water for plants through such climatic proxies as precipitation data (P) or climatic water balance (P minus potential evapotranspiration). We evaluated the ability of simple climatic proxies and soil water balance indices to predict the ecological niches of forest tree species.
Location: France
Methods: Soil water content and deficits were computed and mapped at a resolution of 1 × 1 km throughout France. The predictive abilities of these indices were compared to those of P and climatic water balance to model the distributions of 37 of the most common European tree species. We focused on two species with contrasting water tolerance, Quercus robur and Quercus pubescens, to illustrate the differences between climatic proxies and soil water balance in species response curves and distribution maps.
Results: Throughout France, soil water content was poorly correlated with P and climatic water balance, because low P in the lowlands can be compensated for by water provided by deeper soils, which is not the case in most mountainous areas. Soil water balance performed better than simple climatic water variables for explaining tree species distribution, improving 82% of the models for hygrophilous, meso-hygrophilous, meso-xerophilous, and meso-xerophilous species. Main conclusions: Our results showed that simple climatic values do not accurately represent available water for trees and that soil water balance indices perform better than do climatic proxies for most species. This point is crucial in avoiding underestimating the importance of water in studies aiming to determine the ecological niches of plant species and their responses to climate change.Numéro de notice : A2013-784 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1111/geb.12012 En ligne : https://doi.org/10.1111/geb.12012 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75719
in Global ecology and biogeography > vol 22 n° 4 (April 2013)[article]Documents numériques
en open access
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