Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain

Mejías Gimeno, José A.; Arroyo Marín, Juan; Marañón, Teodoro; Dirección General de Investigación Científica y Técnica, DGICT (España)

Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain

17 pages, 5 figures, 5 tables, 79 references.

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Bibliographic Details
Main Authors:	Mejías Gimeno, José A., Arroyo Marín, Juan, Marañón, Teodoro
Other Authors:	Dirección General de Investigación Científica y Técnica, DGICT (España)
Format:	artículo biblioteca
Language:	English
Published:	Blackwell Publishing 2007
Subjects:	Canonical correspondence analysis, Ecological amplitude, Growth rings, Neogene vegetation, Plant demography, Rhododendron ponticum, Riparian forest, Spatial heterogeneity, Species decline, Strait of Gibraltar,
Online Access:	http://hdl.handle.net/10261/47759 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007273 http://dx.doi.org/10.13039/501100008737
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spelling	dig-irnas-es-10261-477592016-08-19T09:00:19Z Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain Mejías Gimeno, José A. Arroyo Marín, Juan Marañón, Teodoro Dirección General de Investigación Científica y Técnica, DGICT (España) European Commission Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar 17 pages, 5 figures, 5 tables, 79 references. Aims Rhododendron ponticum L. is reputed to be a post Plio-Pleistocene relict plant species with a disjunct distribution that comprises the Iberian Peninsula to the west and the Euxinian region plus some restricted Mediterranean areas to the east. We analysed the ecological range (of subsp. baeticum) in the western area (Aljibe Mountains, north of the Strait of Gibraltar) to understand the factors determining the present area limitation. Location Sierra del Aljibe, north of the Strait of Gibraltar (Iberian Peninsula). Methods We selected 20 riparian sites where R. ponticum is common, and compiled data on the ecological diversity of associated woody species and ferns. We established a 500-m main transect in each site, along the stream or river course, in which we placed five 20-m-long plots at regular intervals. We recorded physiographic habitat features, woody plants and fern abundance, and the number of R. ponticum individuals. Results Rhododendron ponticum in southern Spain is restricted to riparian forests in acidic soils (pH 4.0–6.4), and is mainly found on the banks of inclined and enclosed streams. In our inventory we recorded 59 woody taxa and 12 ferns, with R. ponticum being the dominant species of the understorey (mean abundance 78.6%). The communities are characterized by a high incidence of the humid warm temperate element, both in number of species (18.8 ± 3.7 per site) and abundance; meanwhile, the presence of the modern Mediterranean element (mean number of species 3.4 ± 3.8 per site) appears to be favoured by disturbance. These ecological–historical groups of taxa also show distinct patterns of typological habit, frequency of endemism, infrageneric diversity and geographical range. Populations of R. ponticum are characterized by a very variable density of seedlings in many sites, and the virtual lack of juveniles. Main conclusions Riparian forests of the Aljibe Mountains constitute a refuge for R. ponticum where the species persists, but populations appear to be in decline. The narrow ecological range of R. ponticum in the area strongly contrasts with its wide amplitude in the eastern natural area, mainly the Euxinian region, where R. ponticum probably finds better conditions due to the environmental heterogeneity of the region, and the lack of a hot dry season. Financial support provided by DGICYT-DGESIC grants PB91-0894 and PB95-1144, FED- ER-CICYT grant 1FD97-0743-CO3-03, and GIASA I & II research contracts as a part of environmental compensating tasks for construction of the A-381 highway. Peer reviewed 2012-04-01T10:09:05Z 2012-04-01T10:09:05Z 2007 artículo http://purl.org/coar/resource_type/c_6501 Journal of Biogeography 34: 456-472 (2007) 0305-0270 http://hdl.handle.net/10261/47759 10.1111/j.1365-2699.2006.01627.x 1365-2699 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007273 http://dx.doi.org/10.13039/501100008737 en http://dx.doi.org/10.1111/j.1365-2699.2006.01627.x open Blackwell Publishing
institution	IRNAS ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-irnas-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del IRNAS España
language	English
topic	Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar
spellingShingle	Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar Mejías Gimeno, José A. Arroyo Marín, Juan Marañón, Teodoro Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
description	17 pages, 5 figures, 5 tables, 79 references.
author2	Dirección General de Investigación Científica y Técnica, DGICT (España)
author_facet	Dirección General de Investigación Científica y Técnica, DGICT (España) Mejías Gimeno, José A. Arroyo Marín, Juan Marañón, Teodoro
format	artículo
topic_facet	Canonical correspondence analysis Ecological amplitude Growth rings Neogene vegetation Plant demography Rhododendron ponticum Riparian forest Spatial heterogeneity Species decline Strait of Gibraltar
author	Mejías Gimeno, José A. Arroyo Marín, Juan Marañón, Teodoro
author_sort	Mejías Gimeno, José A.
title	Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
title_short	Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
title_full	Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
title_fullStr	Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
title_full_unstemmed	Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain
title_sort	ecology and biogeography of plant communities associated with the post plio-pleistocene relict rhododendron ponticum subsp. baeticum in southern spain
publisher	Blackwell Publishing
publishDate	2007
url	http://hdl.handle.net/10261/47759 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007273 http://dx.doi.org/10.13039/501100008737
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Ecology and biogeography of plant communities associated with the post Plio-Pleistocene relict Rhododendron ponticum subsp. baeticum in southern Spain

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