Farris, Emmanuele and Pisanu, Stefania and Mameli, Giulia and Filigheddu, Rossella Speranza (2009) Effects of local conditions on the conservation of endangered narrow endemic plants: the case study of the Mediterranean Centaurea horrida Badarò (Asteraceae). In: Conservation biology and beyond: from science to practice: 2nd European Congress of Conservation Biology, 1–5 September 2009, Prague, Czech Republic. Prague, Czech University of Life Sciences, Faculty of Environmental Sciences. p. 167-168. ISBN 978-80-213-1961-5. Conference or Workshop Item.
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It is not only historical reasons that influence the spatial distribution and performance of endemic species but also the local ecological conditions. We estimated the spatial variability of life-history traits of the narrow endemic Mediterranean species Centaurea horrida Badarò (Asteraceae), endemic of Northern Sardinia (Italy). The current conservation status of C. horrida is EN (EOO = 172.43 km2, AOO = 108 km2, population size = 11,719 adults, extinction rate = 18% in 50 years, Pisanu et al. 2009). A considerable amount of genetic variation (He = 0.603–0.854) together with a medium-high differentiation among populations (FST = 0.123; RST = 0.158) was detected. Bayesian analysis and AMOVA suggested that the origins of the current populations lie in two gene pools (Mameli et al. 2008). C. horrida experiments dramatic contraction of its range when secondary succession proceeds. The spatial distribution of C. horrida is not random but concentrated in open microhabitats (Farris et al. 2009). Three factors are determinants of the estimated variability in population structure and reproductive traits of C. horrida: 1) genetics; 2) site management; and 3) local adaptation. Despite its restricted range, three management units could be deemed viable for the conservation of C. horrida.
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