Forest vs Savanna dynamics in the contact zones of French Guiana
Savannas and tropical forests delineated by sharp boundaries are two alternative stable ecosystems. What is the natural evolution of forests over savannas in coastal savanna in French Guiana? The dynamic balance between forest advance and retreat is a response to disturbances such as fire or extreme...
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| Формат: | Стаття |
| Мова: | English |
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Société Française de Photogrammétrie et de Télédétection
2014-09-01
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| Серія: | Revue Française de Photogrammétrie et de Télédétection |
| Предмети: | |
| Онлайн доступ: | https://rfpt.sfpt.fr/index.php/RFPT/article/view/104 |
| _version_ | 1831704415729352704 |
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| author | Gaëlle Viennois Eric A. Nicolini Frédéric Borne |
| author_facet | Gaëlle Viennois Eric A. Nicolini Frédéric Borne |
| author_sort | Gaëlle Viennois |
| collection | DOAJ |
| description | Savannas and tropical forests delineated by sharp boundaries are two alternative stable ecosystems. What is the natural evolution of forests over savannas in coastal savanna in French Guiana? The dynamic balance between forest advance and retreat is a response to disturbances such as fire or extreme drought events. Fire maintains savanna by its action on forest-savanna contact areas, while a dry climate prevents forest expansion. This paper focuses on coastal savannas of French Guiana nested in the Guiana Space Center (CSG) that is occasionally threatened by bushfires in the dry season. This study spanned over 60 years of landscape changes around the CSG and used a georeferenced set of aerial and Pléiades satellite images. Forest and savanna dynamics were mapped and highlighted with the computing of shape indicators. This study showed that the forest progressed of 23% onto savanna and mainly at the forest—savanna contact zones. |
| first_indexed | 2024-12-20T15:58:25Z |
| format | Article |
| id | doaj.art-e3d717cbb5db442d855c3b3bcc6f7029 |
| institution | Directory Open Access Journal |
| issn | 1768-9791 2426-3974 |
| language | English |
| last_indexed | 2024-12-20T15:58:25Z |
| publishDate | 2014-09-01 |
| publisher | Société Française de Photogrammétrie et de Télédétection |
| record_format | Article |
| series | Revue Française de Photogrammétrie et de Télédétection |
| spelling | doaj.art-e3d717cbb5db442d855c3b3bcc6f70292022-12-21T19:34:23ZengSociété Française de Photogrammétrie et de TélédétectionRevue Française de Photogrammétrie et de Télédétection1768-97912426-39742014-09-0120810.52638/rfpt.2014.104Forest vs Savanna dynamics in the contact zones of French GuianaGaëlle Viennois0Eric A. Nicolini1Frédéric Borne2UMR AMAP CNRSCentre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AMAPCentre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), UMR AMAPSavannas and tropical forests delineated by sharp boundaries are two alternative stable ecosystems. What is the natural evolution of forests over savannas in coastal savanna in French Guiana? The dynamic balance between forest advance and retreat is a response to disturbances such as fire or extreme drought events. Fire maintains savanna by its action on forest-savanna contact areas, while a dry climate prevents forest expansion. This paper focuses on coastal savannas of French Guiana nested in the Guiana Space Center (CSG) that is occasionally threatened by bushfires in the dry season. This study spanned over 60 years of landscape changes around the CSG and used a georeferenced set of aerial and Pléiades satellite images. Forest and savanna dynamics were mapped and highlighted with the computing of shape indicators. This study showed that the forest progressed of 23% onto savanna and mainly at the forest—savanna contact zones.https://rfpt.sfpt.fr/index.php/RFPT/article/view/104PléiadesShape IndicesClassificationForest — Savanna DynamicForestSavanna |
| spellingShingle | Gaëlle Viennois Eric A. Nicolini Frédéric Borne Forest vs Savanna dynamics in the contact zones of French Guiana Revue Française de Photogrammétrie et de Télédétection Pléiades Shape Indices Classification Forest — Savanna Dynamic Forest Savanna |
| title | Forest vs Savanna dynamics in the contact zones of French Guiana |
| title_full | Forest vs Savanna dynamics in the contact zones of French Guiana |
| title_fullStr | Forest vs Savanna dynamics in the contact zones of French Guiana |
| title_full_unstemmed | Forest vs Savanna dynamics in the contact zones of French Guiana |
| title_short | Forest vs Savanna dynamics in the contact zones of French Guiana |
| title_sort | forest vs savanna dynamics in the contact zones of french guiana |
| topic | Pléiades Shape Indices Classification Forest — Savanna Dynamic Forest Savanna |
| url | https://rfpt.sfpt.fr/index.php/RFPT/article/view/104 |
| work_keys_str_mv | AT gaelleviennois forestvssavannadynamicsinthecontactzonesoffrenchguiana AT ericanicolini forestvssavannadynamicsinthecontactzonesoffrenchguiana AT fredericborne forestvssavannadynamicsinthecontactzonesoffrenchguiana |