Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)

Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)

13 páginas, 3 figuras, 5 tablas.

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Main Authors: Pérez-Collazos, Ernesto, Segarra-Moragues, José G., Inda, Luis A., Catalán, Pilar
Other Authors: Diputación General de Aragón
Format: artículo biblioteca
Language:English
Published: Wiley-Blackwell 2007-06
Subjects:Allozymes, Conservation, Genetic diversity, Gramineae, Narrow endemics, Steppe plants,
Online Access:http://hdl.handle.net/10261/59962
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spelling dig-cide-es-10261-599622012-11-11T23:00:00Z Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae) Pérez-Collazos, Ernesto Segarra-Moragues, José G. Inda, Luis A. Catalán, Pilar Diputación General de Aragón Allozymes Conservation Genetic diversity Gramineae Narrow endemics Steppe plants 13 páginas, 3 figuras, 5 tablas. Puccinellia pungens (Pau) Paunero is a narrowly endemic grass found in two continental saline lagoons of north-eastern Spain. This rare plant has been classified as 'at risk of extinction' in several national and European catalogues of endangered species. Recent demographic studies indicate that population sizes greatly exceed several million individuals, challenging that threat category. Our genetic analysis, based on allozymes, has shown that in spite of the large population sizes, very low levels of genetic variation were found in P. pungens. Genetic variation was similar in most populations, but the largest, Gallocanta lagoon as a whole, had less variation (35% polymorphic loci, 1.4 alleles/locus, H-T = 0.038) than the more restricted Royuela range (45% polymorphic loci, 1.5 alleles/locus, H-T = 0.056), suggesting a recent population expansion of the Gallocanta populations from few founder lines. The low genetic distances among populations also suggest a recent divergence. The low genetic variation observed cannot be explained fully by eventual clonal spread and rare seedling establishment in the hypersaline environment. This low variation seems to result from extreme recent population bottlenecks as a consequence of habitat conversion to agricultural fields. In the light of our data, it seems unlikely that reinforcement of populations could increase the genetic diversity of the populations. Hence, conservation efforts should focus on avoiding further habitat loss of this endangered steppe grass species. We thank Barbara Wilson, Paul Peterson, and Peter Hollingsworth for their valuable comments and critical review of an earlier version of the manuscript, to Pilar Vicente and Elvira Ballestin, forest guards at the Gallocanta lagoon, for sampling facilities and to David Najar for his help during Figure 1 processing. This work has been supported by a Diputación General de Aragón (DGA) project grant P2002/0290 to P. Catalán and by a DGA doctorate fellowship to E. Pérez-Collazos. Peer reviewed 2012-11-12T11:04:29Z 2012-11-12T11:04:29Z 2007-06 artículo http://purl.org/coar/resource_type/c_6501 Botanical Journal of the Linnean Society 154(2): 269-281 (2007) 0024-4074, http://hdl.handle.net/10261/59962 10.1111/j.1095-8339.2007.00642.x 1095-8339 en http://dx.doi.org/10.1111/j.1095-8339.2007.00642.x none Wiley-Blackwell
institution CIDE ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-cide-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del CIDE España
language English
topic Allozymes
Conservation
Genetic diversity
Gramineae
Narrow endemics
Steppe plants
Allozymes
Conservation
Genetic diversity
Gramineae
Narrow endemics
Steppe plants
spellingShingle Allozymes
Conservation
Genetic diversity
Gramineae
Narrow endemics
Steppe plants
Allozymes
Conservation
Genetic diversity
Gramineae
Narrow endemics
Steppe plants
Pérez-Collazos, Ernesto
Segarra-Moragues, José G.
Inda, Luis A.
Catalán, Pilar
Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
description 13 páginas, 3 figuras, 5 tablas.
author2 Diputación General de Aragón
author_facet Diputación General de Aragón
Pérez-Collazos, Ernesto
Segarra-Moragues, José G.
Inda, Luis A.
Catalán, Pilar
format artículo
topic_facet Allozymes
Conservation
Genetic diversity
Gramineae
Narrow endemics
Steppe plants
author Pérez-Collazos, Ernesto
Segarra-Moragues, José G.
Inda, Luis A.
Catalán, Pilar
author_sort Pérez-Collazos, Ernesto
title Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
title_short Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
title_full Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
title_fullStr Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
title_full_unstemmed Population genetics and the conservation status of the threatened Iberian steppe grass Puccinellia pungens (Pau) Paunero (Poaceae)
title_sort population genetics and the conservation status of the threatened iberian steppe grass puccinellia pungens (pau) paunero (poaceae)
publisher Wiley-Blackwell
publishDate 2007-06
url http://hdl.handle.net/10261/59962
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