Entity

Time filter

Source Type

Pratovecchio, Italy

Corona P.,University of Tuscia | Agrimi M.,University of Tuscia | Baffetta F.,University of Siena | Barbati A.,University of Tuscia | And 5 more authors.
Environmental Monitoring and Assessment | Year: 2012

Urban areas are continuously expanding today, extending their influence on an increasingly large proportion of woods and trees located in or nearby urban and urbanizing areas, the so-called urban forests. Although these forests have the potential for significantly improving the quality the urban environment and the well-being of the urban population, data to quantify the extent and characteristics of urban forests are still lacking or fragmentary on a large scale. In this regard, an expansion of the domain of multipurpose forest inventories like National Forest Inventories (NFIs) towards urban forests would be required. To this end, it would be convenient to exploit the same sampling scheme applied in NFIs to assess the basic features of urban forests. This paper considers approximately unbiased estimators of abundance and coverage of urban forests, together with estimators of the corresponding variances, which can be achieved from the first phase of most large-scale forest inventories. A simulation study is carried out in order to check the performance of the considered estimators under various situations involving the spatial distribution of the urban forests over the study area. An application is worked out on the data from the Italian NFI. © 2011 Springer Science+Business Media B.V. Source


Travaglini D.,University of Florence | Paffetti D.,University of Florence | Bianchi L.,University of Florence | Bottacci A.,Corpo Forestale dello Stato | And 6 more authors.
Plant Biosystems | Year: 2012

An old-growth beech forest stand with silver fir within the strict forest reserve of Sasso Fratino has been examined with the following aims: to characterize forest stand on the basis of classic forest parameters and to assess forest stand structure by means of spatial functions; to provide genetic dating of the beech population. Total census of size and position of living trees and deadwood was performed on a 9200 m 2 permanent plot. Vertical distribution of crowns in the stand was assessed using the TSTRAT function, horizontal stand structure using spatial point pattern analysis. Genetic dating was performed on a sample of beech trees. DNA was isolated and each individual was genotyped at four chloroplast microsatellite loci. Microsatellite profiles were compared with the profiles of control DNA of known haplotypes. Results show a multi-strata vertical structure, a horizontal structure characterized by small gaps (<160 m 2) where silver fir regeneration sets in. Deadwood is present with all the decay classes and with relatively high volumes. Genetic dating ascribes the Sasso Fratino beech stand to the ancestral haplotype 2: this population can therefore be considered a hot spot of haplotype diversity of the glacial refugia present in central Italy. © 2012 Copyright Taylor and Francis Group, LLC. Source


Marini F.,University of Rome La Sapienza | Mutinelli F.,viale dellUniversita 10 | Montarsi F.,viale dellUniversita 10 | Cline A.R.,Plant Pest Diagnostics Center | And 2 more authors.
Journal of Pest Science | Year: 2013

Following a report submitted by a beekeeper to Istituto Zooprofilattico Sperimentale delle Venezie, in Padua province (Borgoricco, Veneto, NE Italy), the authors discovered in April 2011 several specimens of the dusky sap beetle Carpophilus lugubris Murray 1864 (Coleoptera, Nitidulidae) on the bottom board of some beehives. At a later time (May 2012), an isolated specimen was also collected within a Natural Reserve in Belluno province (Feltre, Veneto, NE Italy). These specimens represent the first known records of this species in Italy or Europe as a whole. This is also the first record of the species associated with beehives. This discovery led us to review the available bionomical and faunistic data for this widespread Nearctic and Neotropical species. C. lugubris is a recognized pest of corn, therefore is very important monitoring its possible dispersal into cornfields, beehives, and other agricultural regions of NE Italy and southern Europe over the next few years. © 2013 Springer-Verlag Berlin Heidelberg. Source


Paris P.,National Research Council Italy | Mareschi L.,Corpo Forestale dello Stato | Sabatti M.,University of Tuscia | Tosi L.,National Research Council Italy | And 2 more authors.
IForest | Year: 2015

The sustainability of bioenergy coppice plantations is strongly affected by the Nitrogen (N) balance, whose removal is very high due to the frequent harvest of large quantities of biomass composed of small-sized shoots. Poplar bioenergy coppice plantations could have a Nitrogen removal comparable to herbaceous crops. In this study, five hybrid poplar genotypes (“AF2”, “AF6”, “Monviso”, “83.148.041”, “I214”) were compared for tree morphological traits related to yield, N removal in the harvested biomass and Nitrogen wood concentration (N %) after two biennial coppice rotations in two experimental plantations located in northern Italy. N removal was primarily influenced by biomass production, and linear positive relationships between biomass yield and N removal were established. N removal also varied greatly among genotypes due to clonal differences in yield and in N%, in relation to significant differences among clones for their branching and sprouting habits. In the first rotation, branchiness was positively correlated to N% with a significant coefficient of determination (R2=0.813), while at the end of the second rotation it was also significantly correlated to the shoots per stool ratio (R2=0.804). “Monviso” and “83.148.041” were the clones showing the highest yield, but also a high N% associated to an high level of branchiness and shoots per stool ratio. Our results highlight that poplar genotype selection for sustainable N management should be aimed at genotypes with low wood N concentration, coupling high yield with low branching and sprouting habits as in the case of the clone “AF2”. © SISEF. Source


Landi M.,Corpo Forestale dello Stato | Landi M.,University of Siena | Ricceri C.,University of Siena | Angiolini C.,University of Siena
Journal of Coastal Research | Year: 2012

Disturbed and natural sites are compared in a belt of rehabilitated coastal dune on the Tyrrhenian coast of Italy. The goal was to evaluate rehabilitation success by comparing structure and plant composition in three different vegetation types. Vegetational attributes were used to indicate the trajectory of the vegetation dynamic, by recording increases or decreases in these parameters. The variations in attributes and similarities in composition were investigated using multivariate methods. In general, significant changes between the disturbed and natural sites were indicated by a decrease in annual graminoids, trees, and wind-dispersal species and an increase in rare species. In the rehabilitated site, there was a high rate of recruitment of wind-dispersal species, and rehabilitation seems to have been successful from the point of view of the decrease in annual graminoids and increase in rare species. However, each vegetation type of dune environment was associated with a different number of attributes and different rehabilitation success. Specifically: (i) open sands with annual vegetation growing along drift lines were the most similar among the three sites, from the point of view of both structure and species composition, and are therefore the easiest to rehabilitate; (ii) dunes partially or densely vegetated by herbaceous species showed an increase in rare species in the natural site and were characterized by successful rehabilitation; (iii) dunes densely vegetated by shrubs differed significantly between sites and are consequently the most difficult to rehabilitate. Our comparisons suggest that initial planning efforts should focus on this last type of vegetation cover. © the Coastal Education & Research Foundation 2012. Source

Discover hidden collaborations