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Maldonado-Peralta M.A.,PREGEP Plant Physiology | De Los Santos G.G.,PREGEP Seeds | Garcia-Nava J.R.,Botany | Ramirez-Herrera C.,Forest | And 4 more authors.
Seed Science and Technology | Year: 2016

This research aimed to determine the optimal pre-treatment, tetrazolium concentration and staining times to evaluate the biological condition of the embryos in two nanche species, Malpighia mexicana, collected in Matatlan, and Byrsonima crassifolia, collected from Tehuantepec, Oaxaca. The fruit pulp was removed and the seeds were washed and dried. The embryos were placed in 0.1 or 1% tetrazolium for 18, 24 or 48 hours at 30°C. A random design was used with 12 treatments consisting of four replications of 25 embryos each. Viability and vigour were evaluated based on embryo colour patterns. M. mexicana seeds showed 90% viable vigorous embryos when pre-treated for 24 hours and stained with 0.1% tetrazolium for 48 hours, whereas B. crassifolia seeds showed 90% with 1% tetrazolium for 48 hours. The tetrazolium test allowed for assessment of embryo vigour by the pattern differences and colour intensity obtained.

Carosi A.,University of Perugia | Ghetti L.,Forest | Cauzillo C.,University of Perugia | Pompei L.,University of Perugia | Lorenzoni M.,University of Perugia
Journal of Applied Ichthyology | Year: 2017

The purpose of this research was to analyze the abundance and distribution of four recently introduced fish species in the Tiber River basin: Gobio gobio, Luciobarbus graellsii, Rutilus rutilus, and Rhodeus sericeus. An additional aim was to evaluate the relationships of these species with environmental factors. The study area comprised 92 watercourses in the Umbrian portion of the Tiber River basin and analyzed data collected during 1990-2014, in 158 sampling sites. The results show that all four species were quickly established, with self-sustaining populations revealing invasive characteristics. In just a few years these species extended their distribution significantly in the study area; they preferentially colonized the lower reaches of rivers characterized by warmer waters and a slow current rate and were also associated with poor environmental quality conditions. The research results provide valuable information useful for risk assessment as well as for the design of proper invasive species management programs. © 2017 Blackwell Verlag GmbH.

Carosi A.,University of Perugia | Ghetti L.,Forest | Lorenzoni M.,University of Perugia
Cybium | Year: 2017

The purpose of the research was to analyse the distribution, abundance and growth of Carassius spp., a taxon which includes non-native species introduced into the water bodies of the Umbrian portion of the Tiber River basin during the late 1980s. Additionally, the study estimated the relative weight for Barbus tyberinus, Squalius lucumonis and Sarmarutilus rubilio to investigate the presence of competitive interactions between Carassius spp. and these native species that characterize the middle and lowland reaches of the Umbrian watercourses. Currently, Carassius spp. is widely distributed in both the stagnant and the slow-running waters of the entire basin. The presence of these species was recorded in 34.81 % of the total sampling sites; the results showed that the presence of Carassius spp. was associated with the presence of other non-native species and with poor water quality. In total, 4520 specimens of Carassius spp. were collected and the age composition ranged from 0+ to 9+. The equation for the length-weight relationship (TL-W) was determined as W = 0.010TL3.180. For the Etruscan chub Squalius lucumonis, an endemic species of central Italy, the mean value of the relative weight was significantly higher when Carassius spp. was absent. The results of the research suggest the need to establish effective management conservation strategies for this endemic species. © SFI.

Mirzaee S.,Forest | Motagh M.,German Research Center for Geosciences | Motagh M.,Leibniz University of Hanover | Akbari B.,Forest
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2017

Shabkola is a village located in Mazandaran province of northern Iran that suffers from the mass movement happening in the upstream. Deforestation and changes to land use are the main reasons for the soil instability in this region, which together with steep slope, relatively high precipitation rate and natural erosion has led to such a condition. The area of mass movement is approximately 90 hectares which is a big threat for people living in the region. In this study, we have utilized two different geodetic techniques including InSAR time-series analysis and GPS measurements to assess slope stability in Shabkola. The SAR dataset includes 19 ALOS/PALSAR images spanning from July 2007 to February 2011 while GPS observations are collected in 5 campaigns from September 2011 to May 2014. Displacement as much as approximately 11.7 m in slope direction was detected by GPS observations for the 2011-2014 time period. Most of the slope geometry is in north-south direction, for which the sensitivity of InSAR for displacement detection is low. However, ALOS PALSAR data analysis revealed a previously unknown landslide, covered by dense vegetation in the northern part of main Shabkola landslide, showing line-of-sight velocity of approximately 2cm/year in the time period 2007-2011.

Mirzaee S.,University of Tehran | Motagh M.,University of Tehran | Motagh M.,German Research Center for Geosciences | Arefi H.,University of Tehran | Nooryazdan M.,Forest
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2014

Due to its special imaging characteristics, Synthetic Aperture Radar (SAR) has become an important source of information for a variety of remote sensing applications dealing with environmental changes. SAR images contain information about both phase and intensity in different polarization modes, making them sensitive to geometrical structure and physical properties of the targets such as dielectric and plant water content. In this study we investigate multi temporal changes occurring to different crop types due to phenological changes using high-resolution TerraSAR-X imagers. The dataset includes 17 dual-polarimetry TSX data acquired from June 2012 to August 2013 in Lorestan province, Iran. Several features are extracted from polarized data and classified using support vector machine (SVM) classifier. Training samples and different features employed in classification are also assessed in the study. Results show a satisfactory accuracy for classification which is about 0.91 in kappa coefficient.

Bose P.,Carleton University | Douieb K.,Forest | Iacono J.,New York University | Langerman S.,Free University of Colombia
Algorithmica | Year: 2016

A static binary search tree where every search starts from where the previous one ends (lazy finger) is considered. Such a search method is more powerful than that of the classic optimal static trees, where every search starts from the root (root finger), and less powerful than when rotations are allowed—where finding the best rotation based tree is the topic of the dynamic optimality conjecture of Sleator and Tarjan. The runtime of the classic root-finger tree can be expressed in terms of the entropy of the distribution of the searches, but we show that this is not the case for the optimal lazy finger tree. A non-entropy based asymptotically-tight expression for the runtime of the optimal lazy finger trees is derived, and a dynamic programming-based method is presented to compute the optimal tree. © 2016, Springer Science+Business Media New York.

Saadat H.,McGill University | Adamowski J.,McGill University | Bonnell R.,McGill University | Sharifi F.,Soil Conservation and Watershed Management Research Institute SCWMRI | And 2 more authors.
ISPRS Journal of Photogrammetry and Remote Sensing | Year: 2011

Accelerated soil erosion, high sediment yields, floods and debris flow are serious problems in many areas of Iran, and in particular in the Golestan dam watershed, which is the area that was investigated in this study. Accurate land use and land cover (LULC) maps can be effective tools to help soil erosion control efforts. The principal objective of this research was to propose a new protocol for LULC classification for large areas based on readily available ancillary information and analysis of three single date Landsat ETM+ images, and to demonstrate that successful mapping depends on more than just analysis of reflectance values. In this research, it was found that incorporating climatic and topographic conditions helped delineate what was otherwise overlapping information. This study determined that a late summer Landsat ETM+ image yields the best results with an overall accuracy of 95%, while a spring image yields the poorest accuracy (82%). A summer image yields an intermediate accuracy of 92%. In future studies where funding is limited to obtaining one image, late summer images would be most suitable for LULC mapping. The analysis as presented in this paper could also be done with satellite images taken at different times of the season. It may be, particularly for other climatic zones, that there is a better time of season for image acquisition that would present more information. © 2011 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS).

PubMed | Forest.
Type: Journal Article | Journal: Nursing standard (Royal College of Nursing (Great Britain) : 1987) | Year: 2016

Addenbrookes Hospitals decision to re-introduce smoking rooms is a step forward (News May 6). A total ban produces three major problems.

PubMed | Forest.
Type: Journal Article | Journal: Nursing standard (Royal College of Nursing (Great Britain) : 1987) | Year: 2016

Congratulations to Leeds General Infirmary for resisting the prohibitionist demands of the anti-smoker Utopianists and deciding to reintroduce smoking provision for both patients and staff.

PubMed | Forest.
Type: Journal Article | Journal: Nursing standard (Royal College of Nursing (Great Britain) : 1987) | Year: 2016

The findings of WHOs research into the alleged risk to non-smokers of exposure to environmental tobacco smoke confirm that it in no way constitutes the threat that the antismoker industry would have us all believe.

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