1,721,069 research outputs found
Erratum to Inbreeding and outbreeding depression in geographical parthenogens Heterocypris incongruens and Eucypris virens (Crustacea: Ostracoda) (Italian Journal of Zoology, (2012), (1-9))
No full textThe clonal ecology of Heterocypris incongruens (Ostracoda): life-history traits and photoperiod.
No full textSpatial structure of genetic variability in natural stands of Fagus sylvatica L. (beech) in Italy
No full textWe report an autocorrelation study of 11 enzyme loci detected by starch gel electrophoresis in 14 populations over the Italian biogeographical range of beech (Fagus sylvatica L.). In line with previous studies of beech and other forest tree species a low level of spatial autocorrelation was detected. No correlation between the amount of microspatial structuring of genetic variability in different populations and environmental (latitude, longitude, altitude), structural (mean and standard deviation of tree size) and genetic characteristics (mean expected heterozygosity, mean F(IS)) was found. No significant differences in the amount of spatial structuring seem to exist among loci if low heterozygosity loci are excluded from the analysis
Variazioni temporali delle frequenze geniche in Heterocypris incongruens (Crustacea, Ostracoda).
No full textEgg diapause and clonal structure in parthenogenetic populations of Heterocypris incongruens (Ostracoda)
No full textDifferences in demographic parameters among electrophoretic clones of Daphnia obtusa Kurz (Crustacea, Cladocera).
No full textDeposition season and hatching patterns of resting eggs in Mixodiaptomus kupelwieseri (Crustacea: Copepoda).
No full textIntriguing features of genetic variability in Darwinula stevensoni, a low variability ancient asexual
No full textThe likely impact of climate change on the biodiversity of Italian forests
Full text linkBased on literature results and our expert evaluation, we report some likely impacts of climate change on the biodiversity of forest communities in Italy by the end of this century. In the Mediterranean region and on the Apennines: at low altitudes, vulnerability of Pinus sp. and Quercus ilex forests, with loss of intraspecific genetic variability; transition from Mediterranean closed-canopy macchia to scattered shrublands; risk of local extinction for coastal populations of mesic/relic hardwood species (e.g., Quercus robur, Carpinus betulus, Zelkova sicula, Fraxinus sp.); ’eastern’ relic species like Quercus troiana, Quercus frainetto, Quercus aegilops, and Q. gussonei in Sicily, and the peripheral low-altitude Fagus sylvatica populations, will be highly vulnerable; in the mid-altitude forest, vulnerability of most demanding species like Quercus cerris and Castanea sativa, possible immigration of Mediterranean species like Quercus ilex; in the montane forest, Fagus sylvatica and Abies alba will be less competitive with respect to more continental and drought-resistant tree species, and could loose genetic variability; relic species like Taxus baccata and Betula aetnensis may be at risk. In the alpine region: upward movement of timberline and changes in timberline communities, for instance Picea abies may be more competitive over Larix decidua, and fragmented species like Pinus cembra might become vulnerable. In general, we recognize the difficulty in separating the effects of climatic variables from those of other processes, like fires and land-use change
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