Search results for "Stamen"
showing 10 items of 612 documents
Forest accessibility, Madonie mountains (northern Sicily, Italy): implementing a GIS decision support system
2021
Valorisation and sustainable exploitation of woody biomass from cultivation interventions might be an important opportunity to track alternative development trails for rural communities in natural protected areas. The governance of Mediterranean protected areas is characterized by overlapping, sometimes conflicting institutions, stakeholders and regulations, causing negative impacts on decision-making processes. We present an open source GIS-based decision support system tool for mapping forest accessibility and optimizing woody biomass extraction. Two models were implemented to support forest managers during the decision-making process in designing and managing wood-energy supply chains. T…
Tempi e modi di un’invasione incontrastata: Pennisetum setaceum (Forssk.) Chiov. (Poaceae) in Sicilia.
2010
Circa 50 anni fa venivano segnalati a Catania e a Palermo i primi due casi di spontaneizza-zione di Pennisetum setaceum (Forssk.) Chiov. sul territorio siciliano. Dopo un breve periodo di latenza, questa pianta paleotropicale ha cominciato a diffondersi sempre più rapidamente, tanto che oggi l'adozione di scelte d'intervento assume carattere d'urgenza per via del pesante impatto che essa ha sia sulle comunità pre-forestali (macchie degradate e garighe) sia sulle praterie perenni e annue locali. Dopo aver fornito una panoramica sul comportamento di questa xeno-fita, viene analizzato il suo processo di espansione in Sicilia e viene comparata l'ampiezza della sua nicchia ecologica con quella d…
Elogio delle vagabonde. Erbe, arbusti e fiori alla conquista del mondo.
2010
Testamenta apstrīdēšana.
2018
Autore maģistra darbā ir pētījusi testamenta apstrīdēšanas tiesiskos aspektus, testamenta vietu un ietekmi mantojuma tiesībās, izvirzījusi un piedāvājusi pastāvošo problēmjautājumu risinājuma koncepciju. Pētījuma gaitā autore analizēja pastāvošo situāciju Civillikuma Mantojuma tiesību daļas regulējumā gan attiecībā uz testamenta apstrīdēšanas priekšnoteikumiem, gan kopsakarā ar citiem tiesību institūtiem, piemēram, neatņemamās daļas tiesīgie un mantinieki. Apskatīts arī testamentārās mantošanas institūts kopumā no vēsturiskā aspekta nolūkā veicināt izpratni par tā attīstību un izmaiņām laika gaitā. Pētījuma rezultātā autore piedāvā iespējamos veidus kā atrisināt pastāvošās būtiskākās problē…
Argomento storico e diritto civile. Con uno sguardo alla forma e ai rimedi
2022
Il contributo aspira a delineare alcuni indirizzi di metodo minimi sull’uso dell’argomento storico nel diritto civile, portando due esempî tra loro eterogenei: il formalismo testamentario e l’equilibrio contrattuale.
Climate variability in forest management planning: The LIFE AForClimate project.
2018
Previous research experiences have shown that climate variability can play a relevant role in forest planning and management within a climate change scenario. In forest planning and management, yield tables, site quality indices, age classes, and rates of growth are some of the most frequently used parameters and tools. However, these ‘traditional’ methods do not include the influence of climate variability on forest growth over time, although it is one of the main influencing factors in tree growth. Changes in climate determine changes in thermo-pluviometric regimes that often have a marked influence on forest growth trends. Forest biomass, resilience, and carbon sequestration may be damag…
Tree invasions in Italian forests
2022
Many forest tree species have been moved outside their native range to provide goods and services elsewhere, but some of them have become invasive, causing negative impacts on biodiversity and human activities. The assessment and knowledge on the degree and scale to which forest ecosystems are invaded by non-native trees is of paramount importance for tailored policies and strategies aiming at forest conservation. By analyzing main databases and literature and applying a four-level scale of invasion (not currently invaded and with low invasibility; potentially invasible; moderately invaded; massively invaded), we assessed the current and potential occurrence of twenty-five invasive non-nati…
La Mantia T. (2013) (Recensione) – Schenk H., 2012. Checklist degli uccelli di Molentargius (Sardegna, Italia) 1850-2010 (con fotografie di Melis F. …
2013
Ploidy manipulation for genetic improvement in some Mediterranean fruit crops
2017
Plant breeding is focused on selection of new genotypes with improved traits. Conventional methods based on hybridization and those based on biotechnology (somatic hybridization, genetic transformation, ploidy manipulation, etc.) are used to create novel genetic variations. Biotechnology provides powerful tools for plant breeding, for instance, haploid technology allows achievement of homozygous lines from heterozygous parents in one step, which reduces significantly the time required by conventional methods. Concerning woody species, characterized by self-incompatibility, long juvenile period and high degree of heterozygosity, this technique is the only way to get homozygous lines. Haploid…
The floral nectaries in theLimnanthaceae
1992
Floral nectaries in theLimnanthaceae are established as exoscopic basal bulges of the episepalous stamens. Their nectariferous tissues include the epidermis and hypodermal parenchyma and inLimnanthes are vascularized by phloematic branches of the staminal bundles. Secretion occurs mainly through anomocytic stomata but, in addition, probably through the outer cuticularized thin walls of the epidermal cells. The flower structure is comparatively simple. The nectar is often slightly concealed. A wide range of pollinators can be expected, but bees are observed to be the dominant ones. The systematic position of the family is still obscure. Taxonomic placement near to any other geranialian famil…