813 research outputs found
Depth distribution of Cidaris cidaris (Linnaeus, 1758) and Stylocdaris affinis (Philippi, 1845) (Echinodermata, Echinoidea) around the Maltese Islands
The sea urchins Stylocidaris affinis and Cidaris cidaris (family Cidaridae) are abundant on circalittoral and deeper bottoms off the Maltese Islands. Different authors quote different depth ranges for the two species. The depth distribution in Maltese waters was studied based on material from MEDITS surveys. S. affinis was found at depths of 50-550m with the highest relative abundance between 50m and 150m, predominantly on maerl or coarse sedimentary substrata. C. cidaris was found from ca. 50m to depths greater than 550m, mostly on sandy-mud.peer-reviewe
Maximising MEDITS: using data collected from trawl surveys to characterise the benthic and demersal assemblages of the circalittoral and deeper waters around the Maltese Islands
Data from MEDITS trawl surveys in the waters surrounding the Maltese Islands were analysed to characterise the benthic and demersal assemblages of the central Mediterranean, which are only poorly known, hampering Maltese authorities in meeting legislative obligations. A total of 147 benthic species and 98 demersal species were identified. These formed four well-defined assemblages, whose structure and composition were related to depth. Total species richness and abundance of both demersal and benthic species decreased with depth. The most abundant structuring epibenthic species which characterised the identified assemblages were the tall sea pen Funicularia quadrangularis (present at depths of ca. 50–700 m), the red sea pen Pennatula rubra (ca. 100–450 m), the hydroids Lytocarpia myriophyllum (ca. 100–250 m) and Nemertesia sp. (ca. 100–600), the soft coral Alcyonium palmatum (ca. 100–400 m), and the anemone Actinauge richardi (ca. 100–600 m). These results illustrate how, in the absence of dedicated benthic mapping studies, MEDITS data can be used to provide preliminary information that would not otherwise be available.peer-reviewe
A Geospatial Decision Support System Tool for Supporting Integrated Forest Knowledge at the Landscape Scale
Forests are part of a complex landscape mosaic and play a crucial role for people living both in rural and urbanized spaces. Recent progresses in modelling and Decision Support System (DSS) applied to the forestry sector promise to improve public participative forest management and decision-making in planning and conservation issues. However, most DSS are not open-source systems, being in many cases software designed for site-specific applications in forest ecosystems. Furthermore, some of these systems often miss challenging the integration of other land uses within the landscape matrix, which is a key issue in modern forestry planning aiming at linking recent developments in open-source Spatial-DSS systems to sectorial forest knowledge. This paper aims at demonstrating that a new type of S-DSS, developed within the Life+ project SOILCONSWEB over an open-source Geospatial Cyber-Infrastructure (GCI) platform, can provide a strategic web-based operational tool for forest resources management and multi-purpose planning. In order to perform simulation modelling, all accessible via the Web, the GCI platform supports acquisition and processing of both static and dynamic data (e.g., spatial distribution of soil and forest types, growing stock and yield), data visualization and computer on-the-fly applications. The DSS forestry tool has been applied to a forest area of 5,574 ha in the southern Apennines of Peninsular Italy, and it has been designed to address forest knowledge and management providing operational support to private forest owners and decision-makers involved in management of forest landscape at different levels. Such a geospatial S-DSS tool for supporting integrated forest knowledge at landscape represents a promising tool to implement sustainable forest management and planning. Results and output of the platform will be shown through a short selection of practical case studies
update on one stage immediate breast reconstruction with definitive prosthesis after sparing mastectomies
Abstract Immediate breast reconstruction after skin and nipple-sparing mastectomies is commonly performed as a two-stage procedure; to overcome the paradox of traditional two-stage tissue expander/implant reconstruction used to create a tight muscular pocket that needs expansion to produce lower pole fullness, while losing the laxity of the mastectomy skin flaps, the authors conceived a subpectoral-subfascial pocket by elevating the major pectoral muscle in continuity with the superficial pectoralis fascia up to the inframammary fold. This alteration allowed for the immediate insertion of the definitive implant. The authors present their experience in 220 cases of immediate one-stage breast reconstructions with definitive prostheses in sparing mastectomies. Immediate and long-term local complications were evaluated. Immediate breast reconstruction with definitive anatomical silicone-filled implants can produce excellent cosmetic results (78.6%) with a low rate of complications (17.7%); these results allow for agreement between oncologic, aesthetic and economic purposes
Andic soils and catastrophic mudflows in Italy: morphological and hydropedological evidences
In Italy rapid landslides are the most frequently occurring natural disasters and, after earthquakes, cause the highest number of victims.
In this contribution we attempt to prove that there exist a tight connection between the presence of a specific soil type, namely andic soils, and the occurrence of the main catastrophic mudflows and debris flows occurred in Italy in the last decades.
The study was performed by means of an integrated pedological and hydrological analysis on the detachment crowns of some of the most important catastrophic mudflows and debris flows occurred in Italy in the last decades and involving/evolving surface soils.
The results at both regional (Campania) and National (Italy) scale clearly show that despite the large variability of the environmental settings of the studied sites there are indeed some striking homogeneous soil features in the detachment crowns including (i) soil morphology, (ii) andic features ranging from high to moderate, (iii) high water retention throughout a large range of pressure heads. Results seem to reveal clear cause-effect evidences between andic soils and the investigated catastrophic mudflows/debrisflows; this must be related to the unique physical properties of these soils inducing high landslide vulnerability
Contrasting environmental memories in relict soils on different parent rocks in the south-western Italian Alps
Refining physical aspects of soil quality and soil health when exploring the effects of soil degradation and climate change on biomass production: an Italian case study
This study focuses on soil physical aspects of soil
quality and health with the objective to define procedures with worldwide
rather than only regional applicability, reflecting modern developments in
soil physical and agronomic research and addressing important questions
regarding possible effects of soil degradation and climate change. In
contrast to water and air, soils cannot, even after much research, be
characterized by a universally accepted quality definition and this hampers
the internal and external communication process. Soil quality expresses the
capacity of the soil to function. Biomass production is a primary function,
next to filtering and organic matter accumulation, and can be modeled with
soil–water–atmosphere–plant (SWAP) simulation models, as used in the
agronomic yield-gap program that defines potential yields (Yp) for any
location on earth determined by radiation, temperature and standardized crop
characteristics, assuming adequate water and nutrient supply and lack of
pests and diseases. The water-limited yield (Yw) reflects, in addition, the
often limited water availability at a particular location. Actual yields
(Ya) can be considered in relation to Yw to indicate yield gaps, to be
expressed in terms of the indicator (Ya/Yw)×100.
Soil data to calculate Yw for a given soil type (the genoform) should
consist of a range of soil properties as a function of past management
(various phenoforms) rather than as a single representative dataset. This way
a Yw-based characteristic soil quality range for every soil type is
defined, based on semipermanent soil properties. In this study effects of
subsoil compaction, overland flow following surface compaction and erosion
were simulated for six soil series in the Destra Sele area
in Italy, including effects of climate change. Recent proposals consider soil
health, which appeals more to people than soil quality and is now defined by
separate soil physical, chemical and biological indicators. Focusing on the
soil function biomass production, physical soil health at a given time of a
given type of soil can be expressed as a point (defined by a measured Ya)
on the defined soil quality range for that particular type of soil, thereby
defining the seriousness of the problem and the scope for improvement. The
six soils showed different behavior following the three types of land
degradation and projected climate change up to the year 2100. Effects are
expected to be major as reductions of biomass production of up to 50 %
appear likely under the scenarios. Rather than consider soil physical,
chemical and biological indicators separately, as proposed now elsewhere for
soil health, a sequential procedure is discussed, logically linking the
separate procedures.</p
Assessing the impacts of Cohesion Policy on EU regions: A non-parametric analysis on interventions promoting research and innovation and transport accessibility
Traditionally, the effectiveness of European Cohesion Policy has been evaluated in terms of GDP growth rate. In this paper, we consider the effect of the regional policy in terms of its impacts on two specific fields of intervention, namely ‘research, technological development and innovation’, and ‘transport infrastructure’. Our econometric approach involves the use of a non-parametric regression discontinuity design technique to a uniquely-disaggregated Cohesion Policy dataset broken down according to the specific objectives of each stream of funding. The analysis considers different time intervals and sub-samples. Our results demonstrate a positive impact of Cohesion Policy interventions in these two specific fields of intervention
Volcanic soils and landslides: a case study of the island of Ischia (southern Italy) and its relationship with other Campania events
Abstract. An integrated investigation was carried out on the volcanic soils involved in the landslide phenomena that occurred in 2006 at Mt. Vezzi on the island of Ischia (southern Italy). Chemical (soil pH, organic carbon content, exchangeable cations and cation exchange capacity, electrical conductivity, Na adsorption ratio and Al, Fe and Si forms), physical (particle and pore size distribution, pore structure), hydrological (soil water retention, saturated and unsaturated hydraulic conductivity), mineralogical and micromorphological analyses were carried out for three soil profiles selected in two of the main head scarps. The studied soils showed a substantial abrupt discontinuity in all the studied properties at the interface with a buried fine ash layer (namely, the 2C horizon), that was only marginally involved in the sliding surface of the landslide phenomena. When compared to the overlying horizons, 2C showed (i) fine grey ash that is almost pumice free, with the silt content increasing by 20 %; (ii) ks values 1 order of magnitude lower; (iii) a pore distribution concentrated into small (15–30 μm modal class) pores characterised by a very low percolation threshold (approximately 15–25 μm); (iv) the presence of expandable clay minerals; and (v) increasing Na content in the exchange complex. Most of these properties indicated that 2C was a lower permeability horizon compared to the overlying ones. Nevertheless, it was possible to assume this interface to be an impeding layer to vertical water fluxes only by the identification of a thin (6.5 mm) finely stratified ash layer, on top of 2C, and of the hydromorphic features (e.g. Fe / Mn concretions) within and on top of the layer. Although Mt. Vezzi's soil environment has many properties in common with those of other Campania debris-mudflows (e.g. high gradient, north-facing slope, similar forestry, and volcanic origin of the parent material), the results of this study suggest a more complex relationship between soil properties and landslides and emphasise the role of vertical discontinuities as noteworthy predisposing factors
La integración del Norte Grande: Historia de una idea.”
En este trabajo presentamos un proyecto de integración entre las Universidades Nacionales de Santiago del Estero, Tucumán, Salta, Jujuy, Catamarca, La Rioja, Córdoba, Formosa, Nordeste y Misiones. El que fue resultado de una serie de reuniones previas realizadas, sucesivamente, en diferentes provincias del Noroeste Argentino. La introducción al tema se realiza rescatando el concepto de que una región se identifica, más que por sus elementos morfo-estructurales, por el sistema de relaciones sociales que en ella se establece a lo largo de la historia. A partir de aquí se analizan los documentos “Declaración para la Integración del Norte Grande Argentino”, firmada en Salta el 10 de octubre de 1986, el “Programa Regional Prioritario en el Area de las Ciencias Sociales y Humanas en el NOA: Identidad Cultural y Desarrollo”, Santiago del Estero, abril de 1985; y el “Convenio de Cooperación entre las Universidades Nacionales del Norte Grande Argentino”, protocolizado el 12 de agosto de 2002. Sobre la base del reconocimiento de que, el contexto actual le asigna un nuevo rol a los estados provinciales, como articuladores de la organización en red; y que la necesidad de resolver problemas comunes a varias jurisdicciones, tanto a nivel provincial como en el municipal, toma forma en la idea de región como una articulación más flexible y amplia de los espacios internos, creada mediante procesos de concertación política y acuerdo social para superar los desequilibrios territoriales, es nuestra opinión que las universidades organizadas deben integrarse a esta realidad ya que es el conocimiento el que, en última instancia, dará fuerza a los proyectos de desarrollo. Del análisis documental resaltamos: la vocación integracionista de la región, las coincidencias entre los diagnósticos de situación que se vienen realizando desde la década de los ’80, la falta de respuestas concretas y las nuevas propuestas y acciones para su resolución. Otro elemento que mostramos son las metas establecidas y las concreciones realizadas desde la Escuela de Innovación Educativa de la Universidad Nacional de Santiago del Estero
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