Search results for "relict"
showing 10 items of 34 documents
The forest vegetation from the Garda lake
1998
A study about the forest vegetation occurring along the shores of the Garda lake is presented. The investigation emphasized a noteworthy vegetation diversity, related both to the habitat heterogenity and to the still present traces of several climatic changes that affected the area beginning from the Quaternary period. The examinated woodlands are the result of a compenetration between evergreen characteristic species of the Quercetea ilicis class, representing relicts of the climacic vegetation during the peak of the post-glacial anathermic phase, and deciduous mesothermophilous elements belonging to the Querco-Fagetea class order, which better reflect the present macroclimate. On the basi…
Experimental inhibition of nitric oxide increases Plasmodium relictum (lineage SGS1) parasitaemia.
2012
7 pages; International audience; Malaria is a widespread vector-borne disease infecting a wide range of terrestrial vertebrates including reptiles, birds and mammals. In addition to being one of the most deadly infectious diseases for humans, malaria is a threat to wildlife. The host immune system represents the main defence against malaria parasites. Identifying the immune effectors involved in malaria resistance has therefore become a major focus of research. However, this has mostly involved humans and animal models (rodents) and how the immune system regulates malaria progression in non-model organisms has been largely ignored. The aim of the present study was to investigate the role of…
Immunity, resistance and tolerance in bird-parasite interactions.
2013
12 pages; International audience; Interacting pathogens and hosts have evolved reciprocal adaptations whose function is to allow host exploitation (from the pathogen stand point) or minimize the cost of infection (from the host stand point). Once infected, two strategies are offered to the host: parasite clearing (resistance) or withstanding the infection while paying a low fitness cost (tolerance). In both cases, the immune system plays a central role. Interestingly, whatever the defence strategy adopted by the host, this is likely to have an effect on parasite evolution. Given their short generation time and large population size, parasites are expected to rapidly adapt to the environment…
Notes on the status and the current spread of Viburnum tinus L. (Viburnaceae) in Sicily (Italy)
2021
The authors carried out a multi-disciplinary research in order to clarify the native status of Viburnum tinus in Sicily and update the knowledge about its current regional distribution. With this purpose, a large amount of scientific papers on forestry, botany and palaeo- and archaeobotany was consulted; more useful data issued from papers focused on local historical gardens, from archives and from herbarium specimens. The available data suggest that most of the extant nuclei may issue from the recent colonization of plants introduced just few centuries ago. Although the status of the stands found in some warm and humid sites in the surroundings of the city of Palermo and on the Sicani Moun…
Protection and conservation of the manna ash landscape in Sicily
2017
Known as manna ashes, some local varieties of Fraxinus ornus L. and F. angustifolia Vahl (Oleaceae) are cultivated for extracting the manna, a product rich in mannose which is useful under both pharmaceutical and nutraceutical aspects. As wild plants in Sicily these ashes participate in diversifying evergreen and deciduous oak woods as well as other forest communities at the watercourse borders, together with several species of Salix, Populus and Ulmus, particularly in the hills. Cultivation of manna dates back to ancient times in Sicily and elsewhere and ash groves were increasingly spread up to the half of last century. Then, the culture had a progressive decline due to the abandonment of…
Developments of innovative methodologies for Marine Relict Sand Deposits (DSMRs) identification and remotely-sensed shoreline extraction
2023
This Industrial PhD project is a part of the theme set out in point “Blu Growth” of the National Strategy of Intelligent Specialization (SNSI) approved by the European Commission, which defines among the objectives the sector that refers precisely to the marine extraction industry: activities of extraction of natural resources from the sea, that can be reported to the ATECO code “08.12.0, Extraction of gravel, sand; extraction of clays and kaolin". The proposal includes research actions aimed at the development of innovative systems and tools useful to identify and study the area where is higher the probability to detect the submerged relict sand deposits in some sector of the Mediterranean…
Per una metodologia adeguata al riuso delle aree industriali dismesse - For an adequate methodology to reutilize derelict industrial areas
2013
Le aree industriali dismesse costituiscono "patrimonio" per diverse categorie di valore che deve essere recuperato e valorizzato. Il presente contributo propone obiettivi primari e secondari da condividere per il raggiungimento dell'obiettivo. Today the derelict industrial areasmight constitute an asset in terms of categories of various values that must be recuperated and preserved. The paper shows a series of primary and secondary goals that must be shared by the operators
Peat florulas in the Madonie Regional Park (Sicily)
2009
The floristic exploration of the eastern slopes of the Madonie Mountains in Sicily, carried out between 1975 and 1980, resulted in the discovery of several hydromorphic environments characterized by a thick peaty horizon. Locally named “margiu” or “triemula”, depending on the lower or higher depth, they host plant communities characterized by some species of Juncus and Carex together with acidophilous bryophytes including some species of Sphagnum. Their ecology as well as their flora and vegetation have been studied (Petronici et al. 1978). In some localities fossil pollens have also been examined (Bertolani Marchetti et al. 1984). Floristic analyses pointed out some phytogeographical patte…
Early evolutionary colocalization of the nuclear ribosomal 5S and 45S gene families in seed plants: evidence from the living fossil gymnosperm Ginkgo…
2012
In seed plants, the colocalization of the 5S loci within the intergenic spacer (IGS) of the nuclear 45S tandem units is restricted to the phylogenetically derived Asteraceae family. However, fluorescent in situ hybridization (FISH) colocalization of both multigene families has also been observed in other unrelated seed plant lineages. Previous work has identified colocalization of 45S and 5S loci in Ginkgo biloba using FISH, but these observations have not been confirmed recently by sequencing a 1.8 kb IGS. In this work, we report the presence of the 45S–5S linkage in G. biloba, suggesting that in seed plants the molecular events leading to the restructuring of the ribosomal loci are much o…
Recupero di un'area dismessa a Siracusa
2010
The article describes the proposed redevelopment of a derelict industrial zone in Siracusa, through interventions on ten buildings destined to become tourist and hotel accommodation. The types of installation, materials and buildings techniques to be employed will render the proposed salvage operation sustainable, along with innovative technology and bio-architecture, the use of renewable energy source, all in accordance with the principle of energy-saving.