0000000000208083
AUTHOR
Efisio Mattana
Inter- and intra-variability of seed germination traits of Carpobrotus edulis N.E.Br. and its hybrid C. affine acinaciformis.
Invasions by alien Carpobrotus spp. have been recognised as one of the most severe threats to Mediterranean climate coastal ecosystems, and Carpobrotus is considered one of the most widespread invasive alien genera in the Mediterranean Basin. The aims of this study were to characterise seed germination of both C. edulis and its hybrid C. aff. acinaciformis, in terms of photoperiod, temperature and salinity. Inter- and intra-specific variability in the responses to photoperiod (12/12 h light and total darkness), constant temperatures (5, 10, 15, 20, 25 °C) and an alternating temperature regime (25/10 °C), salt stress (0, 125, 250, 500 mm NaCl) and the recovery of seed germination were evalua…
Floristic traits and biogeographic characterization of the Gennargentu massif (Sardinia)
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), …
Preliminary results on the conservation of Lamyropsis microcephala (Moris) Dittrich & Greuter (Compositae), a threatened endemic species of the Gennargentu massif, Sardinia
Lamyropsis microcephala (Moris) Dittrich & Greuter (Compositae) es un endemismo de la isla de Cerdeña (Italia), sólo conocido de un par de localidades del macizo Gennargentu. El propósito de este trabajo es el de intentar conocer las características de la ecología y biología de la especie que puedan ser importantes de cara a su conservación. Mostramos los resultados preliminares, centrados en la abundancia y distribución de la especie, su capacidad reproductiva y sus posibles amenazas. De los datos obtenidos en el campo parece que la población original se ha fragmentado en dos subpoblaciones. La población total cubre un área de unas 12 Ha, incluyendo unos 2500 individuos. La biología reprod…