925 research outputs found
Spatio-temporal variability in structure and diversity in a semi-natural mixed oak-hornbeam floodplain forest
No full textMixed forests are particularly interesting for forest structure and diversity analyses, as higher complexity and diversity can be expected in these forests compared to pure ones. Integrating different approaches in the analyses of structure and diversity in these forests can provide complementary information on non-spatial, spatial and functional diversity patterns. The study aimed at evaluating the spatio-temporal dynamics in forest structure and diversity in a semi-natural mixed oak-hornbeam floodplain forest. All standing trees were mapped and inventoried in 1995, 2005 and 2016 in three 1-ha mixed forest stands, with different soil moisture regime (xeric, mesic, moist conditions). Traditional, non-spatial structure and diversity measures were coupled with spatially-explicit and functional diversity measures. Results indicated that the three stands showed limited variation in stand structure and similar non-spatial diversity attributes, despite the different species composition. Only the extension to spatial and functional analyses was able to reveal more pronounced differences of diversity patterns, as higher complexity, species mingling, and functional tree complementarity was observed in the moister stand. These findings support use of spatially-explicit easurements in traditional inventory measurement protocols to allow more refined analysis of diversity patterns. On the other hand, functional diversity can be easily implemented in diversity analyses, as it requires species abundance information (which is traditionally collected in forest inventory) and species-specific tree traits which can be inferred from literature
Un epigrama cristiano griego de Creta
No full textThe author of the paper, after revision of the stone, republishes -with apparatus criticus, a Spanish translation and extensive commentary- a Christian funerary epigram from Crete.El autor del artículo, tras la revisión de la piedra, reedita -con aparato crítico, traducción española y un extenso comentario- un epigrama funerario cristiano de Creta
Un epigrama cristiano griego de Creta
No full textThe author of the paper, after revision of the stone,
republishes -with apparatus criticus, a Spanish translation and extensive commentary-
a Christian funerary epigram from Crete.El autor del artículo, tras la revisión de la piedra, reedita -con aparato crítico, traducción
española y un extenso comentario- un epigrama funerario cristiano de Creta
L’uso didattico dei visualizzatori di immagini da aereo e da satellite. Un’esemplificazione per lo studio dei vulcani
No full textGoogle Earth, Google Maps and Bing (Microsoft) represent very important and useful tools for teaching geography and in this paper the author focuses the attention on the added value that these tools provide for the geographical study of volcanoes and the relation between men and volcanoes. After defining a synthesis regarding the main functionalities of these spatial teaching tools and after proposing some methodological considerations, this paper provides an example of a guided lesson subdivided into two parts: the first one illustrates some elements useful to know volcanic morphologies, dynamics, characteristics and phenomena; the second one, which is focussed on Italian regional cases, provides some elements for a didactical evaluation of the exposure to risk and the use of geothermal energy. Thus, the author shows how Google Earth, Google Maps and Bing can represent interesting tools for a modern and engaging teaching of geography which is able to promote interdisciplinary approac
Un nuovo testimone per le rime di Fazio degli Uberti
No full textThe paper aims to present a short fragment of a vernacular poetry manuscript (end of 14th c.), found in codex Lat. Z 478 (= 1661) of Venice's Biblioteca Nazionale Marciana. In particular, the author studies the contribution of this unknown witness to the text of the canzone Io guardo i crespi e i biondi capelli by Fazio degli Uberti, in the light of the stemma codicum Lorenzi had drawn in his recent critical edition of Fazio's poems (Pisa, 2013). Furthermore, the author examines the text transmitted by the Marcian codex of the pseudo-Boccaccian canzone Subita volontà, nuovo accidente. The essay is followed by the critical edition and by the commentary (focusing on linguistic, philological and literary aspects) of two unpublished sonnets
SU DI UN SINGOLARE CASO DI TENTATO MATRICIDIO
No full textMatricide is a not very frequent crime, sometimes even poorly represented in the case studies and scientific contributions of a forensic, psychological and psychiatric forensic and criminological profile. Often it is a crime that immediately recalls the suspicion of a serious mental pathology in the author, ultimately a "pathological" crime. The illustrated case, particular both for the type of relationship between the author / victim, and for the expressive forms, not only presents relevant aspects worthy of being reported, but offers an important series of insights and reflection, also aimed at fulfilling to an important task for science and criminological disciplines: the attempt to restore a sense of accomplishment to the intrinsic and extrinsic aims of the act itself
Projecting Nonnative Douglas Fir Plantations in Southern Europe with the Forest Vegetation Simulator
No full textIn Italy, Douglas-fir has great potential in terms of wood production and drought tolerance. However, a growth reference for mature stands is lacking. We calibrated and validated the Pacific Northwest variant of the Forest Vegetation Simulator (FVS) for Douglas-fir plantations in Italy and then ran the calibrated model to test management alternatives. We calibrated the height-diameter, crown width, crown ratio, and diameter increment submodels of the FVS using multipliers fitted against tree measurements (n = 704) and increment cores (n = 180) from 20 plots. Validation was carried out on tree-level variables sampled in 1996 and 2015 in two independent permanent plots (275 trees). Multiplier calibration improved the error of crown submodels by 7-19%; self-calibration of the diameter growth submodel produced scale factors of 1.0-5.2 for each site. Validation of 20-year simulations was more satisfactory for tree diameter (-6% to +1% mean percent error) than for height (-10% to +8%). Calibration reduced the error, relative to that of yield tables, of the predicted basal area and yield after 50 years. Simulated responses to thinning diverged, depending on site index and competition intensity. The FVS is a viable option for modeling the yield of Douglas-fir plantations in Italy, reflecting the current understanding of forest ecosystem dynamics and how they respond to management interventions
Douglas-fir climate sensitivity at two contrasting sites along the southern limit of the European planting range
No full textDouglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is an important exotic tree species that was planted across a large part of Europe during the last century. In both experimental trials and conventional forest plantations, the trees grow at a high rate and produce high-quality timber. The present study investigated climate-growth relationships of Douglas-fir at two Italian sites that contrast in climate: a Mediterranean area in southern Italy (Mercurella site) and a cooler, moister site in the northern Apennines without summer aridity (Acquerino). The relationship between tree-ring chronologies and monthly climatic variables was evaluated by a moving average and correlation analysis. Results showed that the minimum temperature in February and in March play a key role for Douglas-fir at both sites, with a positive effect on growth. At the northern site, it is also highly sensitive to late summer temperatures (negative correlation) and spring–summer precipitation (positive correlation). Growth rates in southern latitudes were high even in Europe and in the Mediterranean environment, with low sensitivity to climatic fluctuation. On the basis of our results, further common garden experiments should test adaptation and the interaction between genetics and environment of second- or third-generation seeds from old stands across Europe such as done by the old International Union of Forest Research Organizations (IUFRO) or the European Douglas-fir Improvement Research Cooperative (EUDIREC) experimentation programmes
Circulation, Use, Impact: The Consumption of Architectural Books in Early Modern Eastern Adriatic
No full textThe book investigates the consumption of architectural books in the early modern eastern Adriatic through its main stages: circulation, use, and impact. In different chapters, the author show how books circulated and were traded in the area, how and why various readers used them, and finally what impact they have on built architecture. It offers a comprehensive insight into the translation process of theoretical architectural knowledge contained in books into actual designs and buildings
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