Climate change is dramatically threatening biodiversity. Narrowly distributed species are especia... more Climate change is dramatically threatening biodiversity. Narrowly distributed species are especially exposed to extinction risk due to their narrow ecological niche. We used Species Distribution Models at fine spatial resolution (50 m) to investigate changes in the distribution of three range-restricted species of Santolina (Asteraceae) endemic to the Mediterranean Basin (S. decumbens, S. ligustica, S. pinnata). We assessed the future potential range under an optimistic and a pessimistic scenario, and analysed distribution change taking into account three different areas: the distributional range (calculated as convex hull), an area 5 km larger than the distributional range, and a buffer (1 km) around occurrences. Santolina ligustica is expected to dramatically reduce its range under both scenarios, S. decumbens is expected to increase its range under both scenarios and S. pinnata is expected to dramatically reduce its range under pessimistic scenario and to increase it under optimi...
In this contribution, new data concerning the distribution of native vascular flora in Italy are ... more In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.
francaisUne nouvelle espece de Caryophyllaceae, Moehringia argenteria Casazza & Minuto, est decri... more francaisUne nouvelle espece de Caryophyllaceae, Moehringia argenteria Casazza & Minuto, est decrite du Massif Argentera des Alpes Maritimes en Italie. Sa morphologie, sa distribution et son habitat sont presentes avec des references aux aspects bioclimatiques, biogeographiques et phytosociologiques. Sont aussi donnees les caracteristiques permettant la comparaison avec les especes les plus voisines comme Moehringia sedoides(Pers.) Loisel.,Moehringia intermedia Panizzi et Moehringia muscosa L. croissant dans des secteurs proches, mais presentant une morphologie et une ecologie differentes. EnglishA new species of Caryophyllaceae,Moehringia argenteria Casazza & Minuto, is described from the Argentera Massif in the Maritime Alps in Italy. Its morphology, distribution and habitat are given with reference to bio climatic, biogeographical and phytosociological aspects. The characteristics are also presented to enable comparison with most closely related species such as Moehringia sedoides...
BackgroundQuantifying variation of genetic traits over the geographical range of species is cruci... more BackgroundQuantifying variation of genetic traits over the geographical range of species is crucial for understanding the factors driving their range dynamics. The center-periphery hypothesis postulates, and many studies support, the idea that genetic diversity decreases and genetic differentiation increases toward the geographical periphery due to population isolation. The effects of environmental marginality on genetic variation has however received much less attention.MethodsWe tested the concordance between geographical and environmental gradients and the genetic predictions of center-periphery hypothesis for endemicLilium pomponiumin the southern Alps.ResultsWe found little evidence for concordance between genetic variation and both geographical and environmental gradients. Although the prediction of increased differentiation at range limits is met, genetic diversity does not decrease towards the geographical periphery. Increased differentiation among peripheral populations, th...
Climate change is dramatically threatening biodiversity. Narrowly distributed species are especia... more Climate change is dramatically threatening biodiversity. Narrowly distributed species are especially exposed to extinction risk due to their narrow ecological niche. We used Species Distribution Models at fine spatial resolution (50 m) to investigate changes in the distribution of three range-restricted species of Santolina (Asteraceae) endemic to the Mediterranean Basin (S. decumbens, S. ligustica, S. pinnata). We assessed the future potential range under an optimistic and a pessimistic scenario, and analysed distribution change taking into account three different areas: the distributional range (calculated as convex hull), an area 5 km larger than the distributional range, and a buffer (1 km) around occurrences. Santolina ligustica is expected to dramatically reduce its range under both scenarios, S. decumbens is expected to increase its range under both scenarios and S. pinnata is expected to dramatically reduce its range under pessimistic scenario and to increase it under optimi...
In this contribution, new data concerning the distribution of native vascular flora in Italy are ... more In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, exclusions, and status changes to the Italian administrative regions. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.
francaisUne nouvelle espece de Caryophyllaceae, Moehringia argenteria Casazza & Minuto, est decri... more francaisUne nouvelle espece de Caryophyllaceae, Moehringia argenteria Casazza & Minuto, est decrite du Massif Argentera des Alpes Maritimes en Italie. Sa morphologie, sa distribution et son habitat sont presentes avec des references aux aspects bioclimatiques, biogeographiques et phytosociologiques. Sont aussi donnees les caracteristiques permettant la comparaison avec les especes les plus voisines comme Moehringia sedoides(Pers.) Loisel.,Moehringia intermedia Panizzi et Moehringia muscosa L. croissant dans des secteurs proches, mais presentant une morphologie et une ecologie differentes. EnglishA new species of Caryophyllaceae,Moehringia argenteria Casazza & Minuto, is described from the Argentera Massif in the Maritime Alps in Italy. Its morphology, distribution and habitat are given with reference to bio climatic, biogeographical and phytosociological aspects. The characteristics are also presented to enable comparison with most closely related species such as Moehringia sedoides...
BackgroundQuantifying variation of genetic traits over the geographical range of species is cruci... more BackgroundQuantifying variation of genetic traits over the geographical range of species is crucial for understanding the factors driving their range dynamics. The center-periphery hypothesis postulates, and many studies support, the idea that genetic diversity decreases and genetic differentiation increases toward the geographical periphery due to population isolation. The effects of environmental marginality on genetic variation has however received much less attention.MethodsWe tested the concordance between geographical and environmental gradients and the genetic predictions of center-periphery hypothesis for endemicLilium pomponiumin the southern Alps.ResultsWe found little evidence for concordance between genetic variation and both geographical and environmental gradients. Although the prediction of increased differentiation at range limits is met, genetic diversity does not decrease towards the geographical periphery. Increased differentiation among peripheral populations, th...
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