A tale of two forests: ongoing aridification drives population decline and genetic diversity loss at continental scale in Afro-Macaronesian evergreen-forest archipelago endemics
MAIRAL, Mario
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
Jardín Botánico "Viera y Clavijo"
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
Jardín Botánico "Viera y Clavijo"
PELLISSIER, Loïc
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
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Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
MAIRAL, Mario
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
Jardín Botánico "Viera y Clavijo"
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
Jardín Botánico "Viera y Clavijo"
PELLISSIER, Loïc
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
Swiss Federal Institute for Forest, Snow and Landscape Research WSL
SANMARTIN, Isabel
Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
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Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] [CSIC]
Langue
en
Article de revue
Ce document a été publié dans
Annals of Botany. 2018, vol. online, p. 1-13
Oxford University Press (OUP)
Résumé en anglais
<strong>Background and Aims</strong> Various studies and conservationist reports have warned about the contraction of the last subtropical Afro-Macaronesian forests. These relict vegetation zones have been restricted to a ...Lire la suite >
<strong>Background and Aims</strong> Various studies and conservationist reports have warned about the contraction of the last subtropical Afro-Macaronesian forests. These relict vegetation zones have been restricted to a few oceanic and continental islands around the edges of Africa, due to aridification. Previous studies on relict species have generally focused on glacial effects on narrow endemics; however, little is known about the effects of aridification on the fates of previously widespread subtropical lineages. <strong>Methods</strong> Nuclear microsatellites and ecological niche modelling were used to understand observed patterns of genetic diversity in two emblematic species, widely distributed in these ecosystems: Canarina eminii (a palaeoendemic of the eastern Afromontane forests) and Canarina canariensis (a palaeoendemic of the Canarian laurel forests). The software DIYABC was used to test alternative demographic scenarios and an ensemble method was employed to model potential distributions of the selected plants from the end of the deglaciation to the present. <strong>Key Results</strong> All the populations assessed experienced a strong and recent population decline, revealing that locally widespread endemisms may also be alarmingly threatened. <strong>Conclusions</strong> The detected extinction debt, as well as the extinction spiral to which these populations are subjected, demands urgent conservation measures for the unique, biodiversity-rich ecosystems that they inhabit.< Réduire
Mots clés
nuclear microsatellites
subtropical flora
aridification
extinction
Mots clés en anglais
islands
decline
genetic conservation
Origine
Importé de halUnités de recherche