Détail de l'auteur
Auteur Patrick Launeau |
Documents disponibles écrits par cet auteur (2)
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheDynamic of woody plant encroachment {WPE) in an anthropized wetland since the 1950s : origins and effects / Thomas Lafitte in Botany letters, vol. 172, n°3 (Année 2025)
Titre : Dynamic of woody plant encroachment {WPE) in an anthropized wetland since the 1950s : origins and effects Auteurs : Thomas Lafitte, Auteur ; Marc Robin, Auteur ; Françoise Debaine, Auteur ; Jean-Patrice Damien, Auteur ; Patrick Launeau, Auteur ; Cécile Brun, Auteur Article en page(s) : pp. 302-319 Langues : Anglais (eng) Catégories : [ZG] LOIRE-ATLANTIQUE (44)
[Espèces (in biblio)] Salix cinerea
[habitats/milieux] ZH - Zones humides
[Sites] PNR - Brière
[Thèmes] Natura 2000
[Thèmes] VégétationMots-clés : anthropisation plante ligneuse Résumé : "Numerous studies worldwide have reported an increase in woody vegetation in wetland systems. Quantifying and spatialising this phenomenon is essential for the conservation of these environments. ln this study, we propose a spatialisation of the extent and rates of colonisation by woody vegetation in the Natura 2000 sector « Grande Brière, Marais de Donges et du Brivet », a French wetland of major importance. The two species studied that are expanding most are ash willow (Salix cinerea) and pedunculate oak (Quercus robur). Woodland dynamics were reconstructed using aerial archives from 1950 to 2022. We applied photointerpretation and classification methods using LiDAR data thresholding. The recent expansion of afforestation is linked to hydraulic developments and the decline in traditional activities. The potential consequences of the spread of these plant formations are discussed." (source : auteurs) Type de publication : périodique Référence biblio : Lafitte T., Robin M., Debaine F., Damien J.-P., Launeau P., Brun C., 2025 - Dynamic of woody plant encroachment {WPE) in an anthropized wetland since the 1950s : origins and effects. Botany letters, 172 (3) : 302-319. ID PMB : 73187 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=73187
in Botany letters > vol. 172, n°3 (Année 2025) . - pp. 302-319[article]Exemplaires(1)
Cote Localisation Disponibilité P0177-6 Brest Disponible Contribution of Sentinel-2 satellite images for habitat mapping of the Natura 2000 site "Estuaire de la Loire" (France) / Mathieu Le Dez in Remote Sensing Applications : Society and Environment, vol. 24 (Année 2021)
Titre : Contribution of Sentinel-2 satellite images for habitat mapping of the Natura 2000 site "Estuaire de la Loire" (France) Type de document : texte imprimé Auteurs : Mathieu Le Dez, Auteur ; Marc Robin, Auteur ; Patrick Launeau, Auteur Année de publication : 2021 Article en page(s) : 100637 (15 p.) Langues : Anglais (eng) Catégories : [habitats/milieux] 13 - Estuaires et rivières tidales (soumises à marées)
[Thèmes] Cartographie des habitats
[Thèmes] Images satellites
[Thèmes] Natura 2000
[Thèmes] TélédétectionMots-clés : Sentinel-2 EUNIS phytosociologie Résumé : "Habitat mapping is an essential tool to implement the European Habitats Directive 92/43/EEC and to manage the Natura 2000 protected areas network. However, their elaboration is most often based on field surveys, which are time-consuming and expensive when dealing with large areas. In this study, we aimed to evaluate the contribution of Sentinel-2 satellite images for mapping habitats of the Natura 2000 site ‘Estuaire de la Loire’. We used 1,248 phytosociological plots to establish a complete typology of the study site's habitats. Locating these plots led us to select training areas that characterize 39 habitats to calibrate the Random Forest algorithm. We classified 11 single-date images spread evenly over a year and performed a multi-date classification of 9 images. We obtained high overall accuracy between 76.47% and 87.28% for the single-date image classifications and 98.7% for multi-date image classification. Our results demonstrate that Sentinel-2 images are appropriate for accurate habitat mapping and constitute a relevant tool to identify and conserve habitats of community interest." (source : auteurs) Note de contenu : "Highlights :
- We classified habitats of a French Natura 2000 site using Sentinel-2 imagery.
- Single-date image classification yielded up to 87.28% overall accuracy.
- Use of multi-date imagery classification increased this accuracy up to 98.7%.
- Sentinel-2 images are not suitable for mapping habitats that occupy small areas."Type de publication : périodique Référence biblio : Le Dez M., Robin M., Launeau P., 2021 - Contribution of Sentinel-2 satellite images for habitat mapping of the Natura 2000 site "Estuaire de la Loire" (France). Remote Sensing Applications : Society and Environment, 24 : 100637 (15 p.). ID PMB : 70129 DOI : 10.1016/j.rsase.2021.100637 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70129
in Remote Sensing Applications : Society and Environment > vol. 24 (Année 2021) . - 100637 (15 p.)[article]Exemplaires(0)
Disponibilité aucun exemplaire
