Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band
International audience Shrub encroachment into grassland and rocky habitats is a noticeable land cover change currently underway in temperate mountains and is a matter of concern for the sustainable management of mountain biodiversity. Current land cover products tend to underestimate the extent of...
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Online Access: | https://hal.inrae.fr/hal-03086081 https://doi.org/10.3390/rs11232807 |
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ftccsdartic:oai:HAL:hal-03086081v1 2023-05-15T15:12:47+02:00 Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band Carlson, Bradley Z. Bayle, Arthur Carlson, Bradley Thierion, Vincent Isenmann, Marc Choler, Philippe Centre de Recherches sur les Ecosystèmes d'Altitude (CREA Mont-Blanc) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Centre d'études spatiales de la biosphère (CESBIO) Centre National d'Études Spatiales Toulouse (CNES)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales Toulouse (CNES)-Météo France-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Météo France-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) CBNA, Natl Bot Conservatory Alps, 148 Rue Pasteur, F-73000 Chambdry, France Partenaires INRAE LIFE PASTORALP project : LIFE16 CCA/IT/000060 2019 https://hal.inrae.fr/hal-03086081 https://doi.org/10.3390/rs11232807 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/rs11232807 hal-03086081 https://hal.inrae.fr/hal-03086081 doi:10.3390/rs11232807 PRODINRA: 493758 WOS: 000508382100088 http://creativecommons.org/licenses/by/ ISSN: 2072-4292 Remote Sensing https://hal.inrae.fr/hal-03086081 Remote Sensing, MDPI, 2019, 11 (23), pp.1-23. ⟨10.3390/rs11232807⟩ optical remote sensing anthocyanin dwarf shrubs European Alps land cover mapping [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.3390/rs11232807 2022-04-09T22:25:11Z International audience Shrub encroachment into grassland and rocky habitats is a noticeable land cover change currently underway in temperate mountains and is a matter of concern for the sustainable management of mountain biodiversity. Current land cover products tend to underestimate the extent of mountain shrublands dominated by Ericaceae (Vaccinium spp. (species) and Rhododendron ferrugineum). In addition, mountain shrubs are often confounded with grasslands. Here, we examined the potential of anthocyanin-responsive vegetation indices to provide more accurate maps of mountain shrublands in a mountain range located in the French Alps. We relied on the multi-spectral instrument onboard the Sentinel-2A and 2B satellites and the availability of red-edge bands to calculate a Normalized Anthocyanin Reflectance Index (NARI). We used this index to quantify the autumn accumulation of anthocyanin in canopies dominated by Vaccinium spp. and Rhododendron ferrugineum and compared the effectiveness of NARI to Normalized Difference Vegetation Index (NDVI) as a basis for shrubland mapping. Photointerpretation of high-resolution aerial imagery, intensive field campaigns, and floristic surveys provided complementary data to calibrate and evaluate model performance. The proposed NARI-based model performed better than the NDVI-based model with an area under the curve (AUC) of 0.92 against 0.58. Validation of shrub cover maps based on NARI resulted in a Kappa coefficient of 0.67, which outperformed existing land cover products and resulted in a ten-fold increase in estimated area occupied by Ericaceae-dominated shrublands. We conclude that the Sentinel-2 red-edge band provides novel opportunities to detect seasonal anthocyanin accumulation in plant canopies and discuss the potential of our method to quantify long-term dynamics of shrublands in alpine and arctic contexts. Article in Journal/Newspaper Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) Remote Sensing 11 23 2807 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
optical remote sensing anthocyanin dwarf shrubs European Alps land cover mapping [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
optical remote sensing anthocyanin dwarf shrubs European Alps land cover mapping [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Carlson, Bradley Z. Bayle, Arthur Carlson, Bradley Thierion, Vincent Isenmann, Marc Choler, Philippe Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
topic_facet |
optical remote sensing anthocyanin dwarf shrubs European Alps land cover mapping [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Shrub encroachment into grassland and rocky habitats is a noticeable land cover change currently underway in temperate mountains and is a matter of concern for the sustainable management of mountain biodiversity. Current land cover products tend to underestimate the extent of mountain shrublands dominated by Ericaceae (Vaccinium spp. (species) and Rhododendron ferrugineum). In addition, mountain shrubs are often confounded with grasslands. Here, we examined the potential of anthocyanin-responsive vegetation indices to provide more accurate maps of mountain shrublands in a mountain range located in the French Alps. We relied on the multi-spectral instrument onboard the Sentinel-2A and 2B satellites and the availability of red-edge bands to calculate a Normalized Anthocyanin Reflectance Index (NARI). We used this index to quantify the autumn accumulation of anthocyanin in canopies dominated by Vaccinium spp. and Rhododendron ferrugineum and compared the effectiveness of NARI to Normalized Difference Vegetation Index (NDVI) as a basis for shrubland mapping. Photointerpretation of high-resolution aerial imagery, intensive field campaigns, and floristic surveys provided complementary data to calibrate and evaluate model performance. The proposed NARI-based model performed better than the NDVI-based model with an area under the curve (AUC) of 0.92 against 0.58. Validation of shrub cover maps based on NARI resulted in a Kappa coefficient of 0.67, which outperformed existing land cover products and resulted in a ten-fold increase in estimated area occupied by Ericaceae-dominated shrublands. We conclude that the Sentinel-2 red-edge band provides novel opportunities to detect seasonal anthocyanin accumulation in plant canopies and discuss the potential of our method to quantify long-term dynamics of shrublands in alpine and arctic contexts. |
author2 |
Centre de Recherches sur les Ecosystèmes d'Altitude (CREA Mont-Blanc) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Centre d'études spatiales de la biosphère (CESBIO) Centre National d'Études Spatiales Toulouse (CNES)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales Toulouse (CNES)-Météo France-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Météo France-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) CBNA, Natl Bot Conservatory Alps, 148 Rue Pasteur, F-73000 Chambdry, France Partenaires INRAE LIFE PASTORALP project : LIFE16 CCA/IT/000060 |
format |
Article in Journal/Newspaper |
author |
Carlson, Bradley Z. Bayle, Arthur Carlson, Bradley Thierion, Vincent Isenmann, Marc Choler, Philippe |
author_facet |
Carlson, Bradley Z. Bayle, Arthur Carlson, Bradley Thierion, Vincent Isenmann, Marc Choler, Philippe |
author_sort |
Carlson, Bradley Z. |
title |
Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
title_short |
Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
title_full |
Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
title_fullStr |
Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
title_full_unstemmed |
Improved Mapping of Mountain Shrublands Using the Sentinel-2 Red-Edge Band |
title_sort |
improved mapping of mountain shrublands using the sentinel-2 red-edge band |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.inrae.fr/hal-03086081 https://doi.org/10.3390/rs11232807 |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
Arctic The Sentinel |
geographic_facet |
Arctic The Sentinel |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 2072-4292 Remote Sensing https://hal.inrae.fr/hal-03086081 Remote Sensing, MDPI, 2019, 11 (23), pp.1-23. ⟨10.3390/rs11232807⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/rs11232807 hal-03086081 https://hal.inrae.fr/hal-03086081 doi:10.3390/rs11232807 PRODINRA: 493758 WOS: 000508382100088 |
op_rights |
http://creativecommons.org/licenses/by/ |
op_doi |
https://doi.org/10.3390/rs11232807 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
23 |
container_start_page |
2807 |
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1766343424269615104 |