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Biodiversity and Conservation

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01.08.2015 | Review Paper

The silent extinction: climate change and the potential hybridization-mediated extinction of endemic high-mountain plants

verfasst von: José M. Gómez, Adela González-Megías, Juan Lorite, Mohamed Abdelaziz, Francisco Perfectti

Erschienen in: Biodiversity and Conservation | Ausgabe 8/2015

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Abstract

Most global-warming models predict an altitudinal movement of plants. This upward migration of lowland species will surely result in contact with related species inhabiting high-mountain ecosystems. We propose that an overlooked consequence of this upland movement is the possibility for interspecific hybridization between narrowly endemic alpine plants and widely distributed lowland plants. Genetic swamping due to introgressive hybridization might even lead to the genetic extinction of the endemic species, without any apparent detrimental demographic effect. Unfortunately, this phenomenon has long been ignored in the ecological literature, probably because is widely assumed that the ecological effects of climate change are more detrimental than its genetic effects. We tested our idea by searching for human-induced hybridization in a worldwide hotspot biodiversity, the high-mountains of the Sierra Nevada (south-eastern Spain). About 25 % of the endemic flora is already hybridizing in these mountains, mostly with widespread lowland congeners. Some species are even already threatened due to genetic swamping. It is thereby urgent including in future conservation agendas a protocol for detecting and monitoring positive and negative effects of genetic swamping mediated by climate change in high mountains and other sensitive ecosystems.

Nächster Artikel Shrub facilitation is an important driver of alpine plant community diversity and functional composition

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Titel: The silent extinction: climate change and the potential hybridization-mediated extinction of endemic high-mountain plants
verfasst von: José M. Gómez
Adela González-Megías
Juan Lorite
Mohamed Abdelaziz
Francisco Perfectti
Publikationsdatum: 01.08.2015
Verlag: Springer Netherlands
Erschienen in: Biodiversity and Conservation / Ausgabe 8/2015
Print ISSN: 0960-3115
Elektronische ISSN: 1572-9710
DOI: https://doi.org/10.1007/s10531-015-0909-5

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