Search results for " endemics"
showing 10 items of 12 documents
At the intersection of cultural and natural heritage: Distribution and conservation of the type localities of Italian endemic vascular plants
2017
Abstract We conducted a GIS spatial analysis with the aim of providing the first quantitative large-scale overview of the distribution patterns of 1536 type localities ( loci classici ) of 1216 Italian endemic vascular plants and their relationship with a set of descriptive variables. Whereas some variables were used to model the presence-absence distribution patterns of the type localities for the whole set of endemics as well as for the subset of narrow endemics, others (e.g., presence inside or outside protected areas and Italian Important Plant Areas) were considered with the purpose of assessing potential assets or risks for conservation. The largest number of type localities was found…
A new species ofCentaurea(Asteraceae) from Sicily
2008
A new species of Centaurea, Centaurea sicana, endemic to Sicily, is described. This new taxon is close to Centaurea parlatoris and Centaurea giardinae (Sect. Dissectae), the former occurring at Palermo and in the Madonie Mountains, while the latter occurs on the Etna volcano. The new species has so far been found only on the Sicani Mountains, a limestone mountain range in western Sicily, while the related species occur in the surrounding mountains. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 157, 785–788.
Conservation genetics of an endemic from the Mediterranean Basin: high genetic differentiation but no genetic diversity loss from the last population…
2013
The Mediterranean Basin is a biodiversity hotspot, housing > 11.000 narrowly endemic plant species, many of which are declining due to mass tourism and agricultural intensification. To investigate the genetic resource impacts of ongoing habitat loss and degradation, we characterized the genetic variation in the last known populations of Leopoldia gussonei, a self-compatible endangered Sicilian Grape Hyacinth numbering less than 3,000 remaining individuals, using AFLP. Results demonstrated significant genome-wide genetic differentiation among all extant populations (I broken vertical bar(ST) = 0.05-0.56), and genetic clustering according to geographic location. Gene diversity was fairly c…
Assessing the genetic diversity ofCentaurea parlatorisgroup (sect.Dissectae, Compositae) in Sicily using isozymes
2011
Abstract The Centaurea parlatoris group belongs to sect. Dissectae and is one of the most taxonomically critical groups in Sicily. The taxa included in it inhabit dry slopes, pastures and rocky places. Some of them are narrow endemics to Sicily, and others to Italy. The great morphological variability at the intrapopulation level has not permitted the creation of an adequate taxonomic scheme. The recent proposal of two new species from Sicily confirms the insufficient knowledge of the taxonomic diversity. This study involves eight Sicilian populations of the C. parlatoris group. Seven loci from nine enzyme systems [isocitrate dehydrogenase (IDH), malate dehydrogenase (MDH), 6-phosphoglucona…
Floristic traits and biogeographic characterization of the Gennargentu massif (Sardinia)
2013
A study on the vascular flora of the Gennargentu Massif (Central-Eastern Sardinia) is presented. According to our results, the flora consists of 948 taxa: 686 species, 249 sub- species, 10 varieties and 3 hybrids, belonging to 97 families and 427 genera. Three taxa are new findings for the flora of Italy and eight for that of Sardinia. Life form analysis revealed, in particular, dominance of 35.65 % hemicryptophytes, 34.6 % therophytes, 12.13 % geophytes and 11.6 % (nano)-phanero- phytes. As concerns chorology, the Mediterranean element is largely prevailing (68.14%), mainly represented by circum- Medit. (29.1 %) and Euro-Medit. (23.07 %). Endemics are 14.87% of the whole flora (141 taxa), …
Seed germination reports of high mountain species native to Mount Etna (Sicily)
2020
The germination ability of five endemic species from the high mountain belt of Mt. Etna were studied; they are Astragalus siculus, Erysimum etnense, Senecio squalidus subsp. aethnensis, Silene italica subsp. sicula, and Tanacetum vulgare subsp. siculum. Mature seeds were collected in the field, within an elevation range of 1700–2000 m a.s.l. Different experimental conditions were tested and the best methods with optimal germination results are provided and compared for each species. First germination records are given for 4 out of 5 of the investigated taxa.
The use of herbarium specimens in evaluating plant extinction risks: some considerations on Sicilian endemics
2019
Herbarium specimens provide verifiable and citable evidence of the occurrence of plant taxa at a given place and time. Thus they caΩn be used to identify native ranges, and document which plants are occurring, and where, through time. They provide information on rare, extirpated, or extinct species that can no longer be found in nature. Furthermore, they can serve as a means of locating rare or possibly extinct species, recollecting in the area(s) reported on labels. Thus, herbarium specimens can be used as primary sources of data to have evidence-based extinction risk assessments. Each extinction risk assessments is an evidence-based hypothesis of the current level of extinction risk of a …
Pyrus ciancioi (Rosaceae), a new species from Sicily
2012
A new species of Pyrus L. from the Nebrodi Mountains (NE Sicily) is described, named, and illustrated. It differs from P. spinosa in the shape and diameter/length ratio of its fruits and in the width/length ratio of the leaf lamina. An analytical key to the Pyrus species growing in Sicily is provided.
Seed germination data of three Hieracium and one Pilosella (Asteraceae) from Sicily and southern Italy
2020
This work reports the first seed germination data of three Hieracium and one Pilosella (Asteraceae) taxa from Sicily and southern Italy. The studied taxa are: Hieracium hypochoeroides subsp. cilentanum, endemic to Campania, H. schmidtii subsp. nebrodense, endemic to Sicily, H. terraccianoi, endemic to Calabria and Pilosella hoppeana subsp. sicula, endemic to Sicily. The obtained results showed that the investigated taxa produce non-dormant seeds, with a high percentage of germination at all tested thermoperiods (15°C to 25°C and the alternating temperature of 25/15°C). Germination tests carried out in gibberellic acid (GA3) provided similar germination percentages. The data presented in thi…
Loci classici delle piante vascolari endemiche italiane descritte per la Puglia
2014
loci classici of the Italian endemic vascular plants described for Apulia -.the italian endemic vascular plants described for apulia Region are presented. altogether, 66 italian endemics have their locus classicus in apulia, including 9 taxa whose protologues cite several localities, both in apulia and in other Regions.