Arrêt de service lundi 11 juillet de 12h30 à 13h : tous les sites du CCSD (HAL, EpiSciences, SciencesConf, AureHAL) seront inaccessibles (branchement réseau à modifier)
Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Mapping coastal marine ecosystems of the National Park of Banc d’Arguin (PNBA) in Mauritania using Sentinel-2 imagery

Abstract : Coastal marine ecosystems ensure fundamental hydro-ecological functions and support high levels of biodiversity, besides being an important resource for local populations. These biocenosis have been increasingly threatened by human pressures (e.g. pollution, overfishing) along with climate change, which may have a dramatic impact on them. The National Park of Banc d’Arguin (PNBA) in Mauritania, one of the biggest parks in Western Africa, is a RAMSAR zone (classified by UNESCO since 1989) that plays a major role in (i) the maintenance of marine biocenosis, (ii) the protection of the ecosystems and (iii) the sequestration of carbon dioxide. Ecosystem databases and associated maps of the PNBA are out of date and limited to the southern and central parts of the park: updating is thus needed. In this paper, a supervised Support Vector Machine (SVM) was deployed using high-resolution images from Sentinel-2 combined with field data to map marine biocenosis of the PNBA. The results highlight that Sentinel-2 shows good classification accuracy for mapping marine biocenosis (>80% overall accuracy and a kappa index of 0.75), including seagrass beds. Also, the use of high-resolution sensors like SPOT-6 (1.5 m pixels) can overcome the limitations of Sentinel-2 (10 m pixels) when it comes to detecting small ecosystems distributed in patches. The use of freely-downloadable Sentinel-2 data, processed using geoinformatic freeware, make the methodology reproducible, affordable and easily transferable to local actors of biodiversity conservation for long term usage.
Liste complète des métadonnées

https://hal-univ-montpellier3-paul-valery.archives-ouvertes.fr/hal-03520186
Contributeur : Auréa POTTIER Connectez-vous pour contacter le contributeur
Soumis le : jeudi 9 juin 2022 - 15:15:24
Dernière modification le : mardi 5 juillet 2022 - 10:00:49

Fichier

1-s2.0-S0303243421001264-main....
Publication financée par une institution

Licence


Distributed under a Creative Commons Paternité - Pas d'utilisation commerciale - Pas de modification 4.0 International License

Identifiants

Citation

A. Pottier, Thibault Catry, Ewan Trégarot, Jean-Paul Maréchal, Veronica Fayad, et al.. Mapping coastal marine ecosystems of the National Park of Banc d’Arguin (PNBA) in Mauritania using Sentinel-2 imagery. International Journal of Applied Earth Observation and Geoinformation, Elsevier, 2021, 102, pp.102419. ⟨10.1016/j.jag.2021.102419⟩. ⟨hal-03520186⟩

Partager

Métriques

Consultations de la notice

2434

Téléchargements de fichiers

19533