1,721,374 research outputs found
Lichen diversity and lichen transplants as monitors of air pollution in a rural area of central Italy
No full textThe results of a biomonitoring study carried out in the Municipality of Colle di Val d'Elsa (central Italy), using the diversity of epiphytic lichens and the accumulation of selected elements in thalli of the lichen Evernia prunastri transplanted in two urban sites are reported. The results indicate that the survey area suffers from different types of pollution. The main air pollutants are NOX and Pb. Vehicular traffic and domestic heating are the main sources of the former, and traffic and a crystal factory of the latter. Furthermore, most study area is eutrophicated due to diffuse agricultural activities and the presence of pig and sheep stockfarms
Eticità delle scelte in medicina. Il caso farmaci ovvero l'etica del quotidiano tra sapere scientifico ed economia
No full textUpdating on tumor markers in tissues and biological fluids: Immunology of host-tumor interaction.
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Fragmentation of Mediterranean oak forests affects the diversity of epiphytic lichens
No full textThe present study investigated a fragmented Mediterranean oak forest to evaluate so called edge effect on species richness and composition of epiphytic lichen communities colonizing tree trunks.
The results showed that in Mediterranean oak forest patches, epiphytic lichen diversity and communities are significantly influenced by microlimatic variables related to the edge effect. Light influx rather than atmospheric humidity and temperature was the main driving factor affecting lichen diversity along the forest edge-interior gradient, while humidity is the prevailing factor inside the forest. It is concluded that forest fragmentation may have a heavy impact of epiphytic lichens, with the reduction and disappearance of typical forest species and the appearance of ubiquitous tolerant species, with an overall impoverishment and banalization of the lichen flora
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