La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)

Between 60 and 70 % of the native flora of the islands of French Polynesia (South Pacific) are located in montane ecosystems, in the so-called “orophilous vegetation“. Due to its cooler climate, this high elevation zone is relatively protected from anthropogenic activities and from the invasion of a...

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Autores principales:	Robin Pouteau, Jean-Yves Meyer, Ravahere Taputuarai, Benoît Stoll
Formato:	article
Lenguaje:	FR
Publicado:	Éditions en environnement VertigO 2010
Materias:	Biodiversity global warming orophilous vegetation remote sensing support vector machines (SVM) Tahiti Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/ef8389deb4dc40b39c7e13c0c2bec46a
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spelling	oai:doaj.org-article:ef8389deb4dc40b39c7e13c0c2bec46a2021-12-02T10:00:40ZLa fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)1492-844210.4000/vertigo.10580https://doaj.org/article/ef8389deb4dc40b39c7e13c0c2bec46a2010-12-01T00:00:00Zhttp://journals.openedition.org/vertigo/10580https://doaj.org/toc/1492-8442Between 60 and 70 % of the native flora of the islands of French Polynesia (South Pacific) are located in montane ecosystems, in the so-called “orophilous vegetation“. Due to its cooler climate, this high elevation zone is relatively protected from anthropogenic activities and from the invasion of alien species which are particularly aggressive at lower elevations. If global warming, recorded to be 0.034°C per year since 1958 in the main island of Tahiti, is persisting, air temperature will increase by 3.1°C in 2100, causing a vertical shift of vegetation and a drastic decrease of the orophilous vegetation area. Some endemic species unable to migrate higher in elevation will be doomed. According to our results, orophilous vegetation will decrease from 14,000 ha nowadays to 1,500 ha in 2100, which represents a 90 % reduction of the current area. Consequences on biodiversity will be : (i) the loss of a unique ecosystem in French Polynesia, the subalpine zone, and the extinction of, at least, six plant species restricted to this habitat and endemic to Tahiti ; (ii) the loss and fragmentation of the cloud forests, which will only be found on the highest summits, leading to an additional risk of extinction ; and (iii) the expansion of alien invasive species, having already an enormous ecological impact in Tahiti.Robin PouteauJean-Yves MeyerRavahere TaputuaraiBenoît StollÉditions en environnement VertigOarticleBiodiversityglobal warmingorophilous vegetationremote sensingsupport vector machines (SVM)TahitiEnvironmental sciencesGE1-350FRVertigO, Vol 10, Iss 3 (2010)
institution	DOAJ
collection	DOAJ
language	FR
topic	Biodiversity global warming orophilous vegetation remote sensing support vector machines (SVM) Tahiti Environmental sciences GE1-350
spellingShingle	Biodiversity global warming orophilous vegetation remote sensing support vector machines (SVM) Tahiti Environmental sciences GE1-350 Robin Pouteau Jean-Yves Meyer Ravahere Taputuarai Benoît Stoll La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
description	Between 60 and 70 % of the native flora of the islands of French Polynesia (South Pacific) are located in montane ecosystems, in the so-called “orophilous vegetation“. Due to its cooler climate, this high elevation zone is relatively protected from anthropogenic activities and from the invasion of alien species which are particularly aggressive at lower elevations. If global warming, recorded to be 0.034°C per year since 1958 in the main island of Tahiti, is persisting, air temperature will increase by 3.1°C in 2100, causing a vertical shift of vegetation and a drastic decrease of the orophilous vegetation area. Some endemic species unable to migrate higher in elevation will be doomed. According to our results, orophilous vegetation will decrease from 14,000 ha nowadays to 1,500 ha in 2100, which represents a 90 % reduction of the current area. Consequences on biodiversity will be : (i) the loss of a unique ecosystem in French Polynesia, the subalpine zone, and the extinction of, at least, six plant species restricted to this habitat and endemic to Tahiti ; (ii) the loss and fragmentation of the cloud forests, which will only be found on the highest summits, leading to an additional risk of extinction ; and (iii) the expansion of alien invasive species, having already an enormous ecological impact in Tahiti.
format	article
author	Robin Pouteau Jean-Yves Meyer Ravahere Taputuarai Benoît Stoll
author_facet	Robin Pouteau Jean-Yves Meyer Ravahere Taputuarai Benoît Stoll
author_sort	Robin Pouteau
title	La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
title_short	La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
title_full	La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
title_fullStr	La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
title_full_unstemmed	La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)
title_sort	la fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de tahiti (polynésie française)
publisher	Éditions en environnement VertigO
publishDate	2010
url	https://doaj.org/article/ef8389deb4dc40b39c7e13c0c2bec46a
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La fonte de la biodiversité dans les îles : modélisation de l’impact du réchauffement global sur la végétation orophile de Tahiti (Polynésie française)

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