Search results for "mediterranean"
showing 10 items of 3196 documents
Systemic silviculture and Mediterranean forest complexity: the need for a new paradigm in forestry
2011
La crescente minaccia di riduzione, semplificazione e scomparsa dei fondamentali caratteri di diversita biologica che caratterizza l’ambiente mediterraneo, e segnatamente le sue formazioni forestali, rende necessario rivedere le strategie di intervento colturale e gestione. In passato hanno prevalso, in specie nei boschi pubblici, forme di gestione e di applicazione della selvicoltura alquanto semplificate e volte a massimizzare soprattutto la funzione produttiva e a “normalizzare “ le formazioni forestali. Viceversa emerge sempre piu chiaramente la complessita dei sistemi mediterranei. Pertanto e necessario uscire dagli schemi preordinati e adottare un approccio che comprenda e rispetti ta…
Notes about the naturalization in Sicily of Paulownia tomentosa (Paulowniaceae) and remarks about its global spread
2019
Paulownia tomentosa is native to different regions of East Asia. Here, the first case of natural regeneration in Sicily is reported. Although Paulownia is not still invading typically Mediterranean areas, mainly due to ecological constraints, its recognized invasiveness at a global level imposes the need to monitor the ongoing process.
Centaurea heywoodiana (Asteraceae), a new species from the Nebrodi Mountains (NE-Sicily)
2020
A new endemic species of Centaurea is here described from the Nebrodi Mountains, in Sicily, and named Centaurea heywoodiana. Information on its morphology, distribution, ecology and taxonomic relationship is also provided.
The genus Tamarix (Tamaricaceae) in Apulia (southern Italy)
2018
This survey is part of the floristic exploration activities on the Italian territory related to the identification of spontaneous and cultivated plants of the genus Tamarix L. A list of tamarisks from Apulia (southern Italy) is here reported together with ecological and distributive data. On the whole, 7 species and 1 variety were recorded in the Apulian region. T. arborea var. arborea is the species with the widest distribution in the Apulian territory. The presence of T. canariensis, T. dalmatica and T. gallica, previously indicated for Apulia by other authors, is currently not confirmed.
Corb. (), new to the Italian bryoflora
1999
Abstract Fossombronia crozalsii Corb. ( Codoniaceae ) was recently found on the island of Linosa (Pelagian Islands, Sicily). The species is new for the Italian bryological flora, enlarging the area of distribution of this species in the Mediterranean basin. Fossombronia crozalsii was found on volcanic soil associated with other interesting and rare hepatics, in particular Exormotheca pustulosa Mitt. Finally, for both species some ecological and phytogeographical considerations related to their presence in the Mediterranean basin are discussed.
Effects of aquaculture waste feeds and antibiotics on marine benthic ecosystems in the Mediterranean Sea
2022
Intensive aquaculture is an important source of organic waste and antibiotics into the marine environment. Yet, their impacts on benthic marine ecosystems are poorly understood. Here, we investigated the ecological impacts of fish feed waste alone and in combination with three different antibiotics (i.e., oxytetracycline, florfenicol and flumequine) in benthic ecosystems of the Mediterranean Sea by performing a field experiment. We assessed the fate of the antibiotics in the sediment and their accumulation in wild fauna after two weeks of exposure. Moreover, we investigated the impact of the feed waste alone and in combination with the antibiotics on sediment physico-chemical properties, on…
How building an underwater pipeline connecting Libya to Sicilian coast is affecting environment: polycyclic aromatic hydrocarbons (PAHs) in sediments…
2009
The purpose of this study was to determine the variation of concentrations and distribution of PAHs in the sediments of the Gela coastal area (Italy) caused by the construction of an underwater pipeline connecting Libya to Sicilian coast. The receiving terminal of offshore pipeline, crossing the Mediterranean Sea, 516 Km long, up to 1127 meters deep, is located in Gela (Sicily, Italy). No bibliographic data regarding hydrocarbons are available for this area. In this paper we report the results of analysis on the water and organic along PAHs.The total concentrations of 16 PAHs in the sediments, analyzed during five surveys, ranged from 2.4 to 434 microg/kg of dry weight. The highest concentr…
Distribution of REEs in box-core sediments offshore an industrial area in SE Sicily, Ionian Sea: Evidence of anomalous sedimentary inputs
2009
The distribution of rare earth elements and yttrium (REEs+Y) has been investigated in box-core sediments recovered from four stations in the Sicilian coastal zone seawards of Augusta, one of the most industrialized and contaminated areas in the Mediterranean region. Shale-like REE patterns and low Y/Ho ratios (close to the chondritic ratio) suggest a dominant terrigenous (geogenic) source for REE. Slight enrichment of LREE over the HREE is interpreted as due to preferential adsorptive transfer of LREE from seawater to sediment particles. Samples from offshore cores exhibit slightly positive Gd and negative Ce anomalies. It is here hypothesized that main drivers of anthropogenic Gd flux towa…
Risk assessment on the presence of pharmaceuticals in sediments, soils and waters of the Pego-Oliva Marshlands (Valencia, eastern Spain).
2012
9 páginas, 3 figuras, 2 tablas.
Benthic foraminiferal response to trace element pollution. The case study of the Gulf of Milazzo, NE Sicily (Central Mediterranean Sea).
2013
The response of benthic foraminiferal assemblages to trace element pollution in the marine sediments of the Gulf of Milazzo (north-eastern Sicily) was investigated. Since the 1960s, this coastal area has been a preferred site for the development of two small marinas and a commercial harbour as well as for heavy industry. Forty samples collected in the uppermost 3-4 cm of an undisturbed layer of sediment in the littoral environment were used for this benthic foraminiferal analysis. The enrichment factors (EFs) of selected trace elements (As, Co, Cr, Cu, Mn, Ni, Pb and Zn) were also calculated. Changes both in benthic foraminiferal assemblages and in some trace elements concentrations have pr…