Search results for "mediterranean sea."

showing 10 items of 830 documents

Soil gas prospection of He,222Rn and CO2: Vulcano Porto area, Aeolian Islands, Italy

1997

Abstract In March 1994, soil gases were sampled in the area of Vulcano Porto, on the island of Vulcano, using a grid of about 200 points/km 2 . Analysed gases were CO 2 , He and 222 Rn and, over a smaller area, H 2 S. Some of the samples were also analysed for the isotope composition of CO 2 C. Three anomalous CO 2 degassing areas were identified: Grotta dei Palizzi, the area near the Telephone Exchange, and the area near the beach fumaroles. The behaviour of He and 222 Rn is different in these 3 areas. The concentration of He is much lower than that of atmospheric He (down to −3950 ppb) in the isthmus, and only in the area near Grotta dei Palizzi does it have values significantly higher th…

Soil gasGeochemistryPollutionFumaroleProspectionMediterranean seaGeochemistry and PetrologySoil waterEnvironmental ChemistryAeolian processesPhysical geographyAtmospheric emissionsGeologyWest mediterraneanApplied Geochemistry
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Manifesto del design meridiano

2021

Utopian - First, let's get it out of our heads that there are no alternatives; rather, let's start dreaming and imagining a different world. At the basis of every change, in fact, there is a vision - the conditio sine qua non of design (project) - which becomes reality when we move from idea to action. However, the world does not always change as someone would like to design it. In fact, it almost never happens. More often, major changes are the direct or indirect consequence of technical advances that are initially irrelevant and then prove to be socially overwhelming. The germ of change, for example, may be contained in one pill, or perhaps two: the birth control pill and the power pill.

Southern IdentityDesignMediterranean SeaSettore ICAR/13 - Disegno IndustrialeEthic
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Halfway up the trophic chain: development of parasite communities in the sparid fish Boops boops

2007

SUMMARYWe examined the patterns of composition and structure of parasite communities in the Mediterranean sparid fish Boops boops along a gradient of fish sizes, using a large sample from a single population. We tested the hypothesis that species forming the core of the bogue parasite fauna (i.e. species which have a wide geographical range and are responsible for recognizable community structure) appear early in the fish ontogeny. The sequential community development observed supported the prediction that core species appear in the fish population earlier than rare and stochastic species. There was also a strong correlation between the order of ‘arrival’ of the species and their overall pr…

SparidaeRange (biology)Parasitic Diseases AnimalPopulationZoologyHost-Parasite InteractionsFish DiseasesMediterranean SeaPrevalenceAnimalsBody SizeeducationRelative species abundancePopulation dynamics of fisheriesPopulation Densityeducation.field_of_studybiologyEcologyCommunity structureBiodiversityBoops boopsbiology.organism_classificationPerciformesInfectious DiseasesAnimal Science and ZoologyParasitologyBiologieBoopsParasitology
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A mitochondrial phylogeography of Brachidontes variabilis (Bivalvia: Mytilidae) reveals three cryptic species

2007

This study examined genetic variation across the range of Brachidontes variabilis to produce a molecular phylogeography. Neighbour joining (NJ), minimum evolution (ME) and maximum parsimony (MP) trees based on partial mitochondrial DNA sequences of 16S-rDNA and cytochrome oxidase (COI) genes revealed three monophyletic clades: (1) Brachidontes pharaonis s.l. from the Mediterranean Sea and the Red Sea; (2) B. variabilis from the Indian Ocean; (3) B. variabilis from the western Pacific Ocean. Although the three clades have never been differentiated by malacologists employing conventional morphological keys, they should be ascribed to the taxonomic rank of species. The nucleotide divergences b…

Species complexbiologyEcologyRange (biology)Zoologybiology.organism_classificationMonophylyPhylogeographyMediterranean seaBrachidontes pharaonisGeneticsVicarianceBrachidontesAnimal Science and ZoologyBrachidontes variabilis – B. pharaonis Mytilidae – Phylogeography – 16S-rDNA – COI.Molecular BiologyEcology Evolution Behavior and SystematicsJournal of Zoological Systematics and Evolutionary Research
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Evenness, biodiversity, and ecosystem function of intertidal communities along the Italian coasts: Experimental short-term response to ambient and ex…

2023

Biodiversity can promote ecosystem functioning in both terrestrial and marine environments, emphasizing the neces- sity ofbiodiversity conservation in order to preserve critical ecosystem functions and associated services. However, the role of biodiversity in buffering ecosystem functioning under extreme events caused by climate change remains a major scientific issue, especially for intertidal systems experiencing stressors from both terrestrial and marine drivers. We performed a regional-scale field experiment along the Italian coast to investigate the response of unmanipulated intertidal communities (by using a natural biodiversity gradient) to low tide aerial exposure to both ambient an…

Species richneEnvironmental EngineeringChlorophyll AEvennessFunctional richneAmbient temperature; Climate change; Ecosystem functioning; Evenness; Extreme warming conditions; Functional richness; Intertidal biodiversity; Mediterranean Sea; Species richnessExtreme warming conditionsPollutionFunctional richnessEcosystem functioningMediterranean SeaClimate changeEnvironmental ChemistryAmbient temperatureIntertidal biodiversityWaste Management and DisposalEvenneEcosystemSpecies richnessScience of The Total Environment
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Following the Phoenician example: western Mediterranean colonization by <em>Spirobranchus</em> cf. <em>tetraceros</em> (Annel…

2020

A newly established population of the fouling polychaete Spirobranchus cf. tetraceros is reported from the western Mediterranean (Valencia Port). Despite previous intensive surveys, this is the first record for the taxon in the Iberian Peninsula. Molecular analyses revealed that S. cf. tetraceros from Valencia are genetically identical to specimens from Heraklion, Crete, but different from those collected in the Red Sea and S. tetraceros sensu stricto from the type locality in Australia. Mediterranean and Red Sea S. cf. tetraceros form a well-supported monophyletic clade but are clearly distinct from New South Wales specimens of S. tetraceros. Our new molecular evidence supports the hypothe…

Spirobranchuseducation.field_of_studySpecies complexbiologyEcologyPopulationAquatic ScienceOceanographybiology.organism_classificationMonophylyTaxonMediterranean seaSerpulidaeGeographyType localityeducationScientia Marina
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Effects of ocean acidification on embryonic respiration and development of a temperate wrasse living along a natural CO2 gradient

2016

Volcanic CO2 seeps provide opportunities to investigate the effects of ocean acidification on organisms in the wild. To understand the influence of increasing CO2 concentrations on the metabolic rate (oxygen consumption) and the development of ocellated wrasse early life stages, we ran two field experiments, collecting embryos from nesting sites with different partial pressures of CO2 [pCO2; ambient (400 µatm) and high (800-1000 µatm)] and reciprocally transplanting embryos from ambient- to high-CO2 sites for 30 h. Ocellated wrasse offspring brooded in different CO2 conditions had similar responses, but after transplanting portions of nests to the high-CO2 site, embryos from parents that sp…

StageOcean Acidification International Coordination Centre (OA-ICC)TemperateRegistration number of speciesSalinityinorganicYolk area standard errorAlkalinityExperimentTemperature waterCarbon inorganic dissolvedCalculated using seacarb after Nisumaa et al 2010Aragonite saturation stateRespiration rate oxygenChordataAlkalinity totaltotalCO2 ventpHPelagosReproductionRespirationSymphodus ocellatusTemperatureYolk areadissolvedCarbonate ionPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Field experimentTemperature water standard deviationTime pointstandard errorRespiration rateEarth System Researchstandard deviationFOS: Medical biotechnologyUniform resource locator link to referenceTime point descriptiveHatchling lengthCalcite saturation statewaterPartial pressure of carbon dioxidedescriptiveGrowth MorphologyFigureUniform resource locator/link to referenceSalinity standard deviationOcean Acidification International Coordination Centre OA ICCMediterranean SeaAnimaliaEggs areaTypeBicarbonate ionNektonEggs area standard errorCalculated using seacarb after Nisumaa et al. (2010)SpeciesPartial pressure of carbon dioxide standard deviationCarbonate system computation flagpH standard deviationHatchling length standard errorFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonTreatmentOxygenPartial pressure of carbon dioxide water at sea surface temperature wet airCarbon dioxideGrowth/MorphologySingle speciesOxygen standard deviationFugacity of carbon dioxide water at sea surface temperature wet airCoast and continental shelf
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Spatio-temporal behaviour of the deep chlorophyll maximum in Mediterranean Sea: Development of a stochastic model for picophytoplankton dynamics

2013

In this paper, by using a stochastic reaction-diffusion-taxis model, we analyze the picophytoplankton dynamics in the basin of the Mediterranean Sea, characterized by poorly mixed waters. The model includes intraspecific competition of picophytoplankton for light and nutrients. The multiplicative noise sources present in the model account for random fluctuations of environmental variables. Phytoplankton distributions obtained from the model show a good agreement with experimental data sampled in two different sites of the Sicily Channel. The results could be extended to analyze data collected in different sites of the Mediterranean Sea and to devise predictive models for phytoplankton dynam…

Stochastic modellingFOS: Physical sciencesStructural basinBiologyRandom processe01 natural sciencesIntraspecific competitionMediterranean sea0103 physical sciencesPhytoplanktonMarine ecosystemSpatial ecologyMarine ecosystem14. Life underwaterQuantitative Biology - Populations and Evolution010306 general physicsPhytoplankton dynamic010301 acousticsEcology Evolution Behavior and SystematicsDeep chlorophyll maximumEcologyEcological ModelingPopulations and Evolution (q-bio.PE)Spatial ecology; Marine ecosystems; Phytoplankton dynamics; Deep chlorophyll maximum; Random processes; Stochastic differential equationsSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Oceanography13. Climate actionPhysics - Data Analysis Statistics and ProbabilityFOS: Biological sciencesSpatial ecologyStochastic differential equationsDeep chlorophyll maximumData Analysis Statistics and Probability (physics.data-an)
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Marinifilum flexuosum sp. nov., a new Bacteroidetes isolated from coastal Mediterranean Sea water and emended description of the genus Marinifilum Na…

2012

Abstract A facultatively anaerobe, moderately halophilic, Gram-negative, filamentous, non motile and unpigmented bacterium, designated M30 T , was isolated from coastal Mediterranean Sea water in Valencia, Spain. Phylogenetic analysis based on 16S rRNA sequences placed this strain in the phylum “ Bacteroidetes ” with Marinifilum fragile JC2469 T as its closest relative with 97% sequence similarity. Average nucleotide identity (ANI) values between both strains were far below the 95% threshold value for species delineation (about 89% using BLAST and about 90% using MUMmer). A comprehensive polyphasic study, including morphological, biochemical, physiological, chemotaxonomic and phylogenetic d…

Strain (chemistry)Phylogenetic treePhylumBacteroidetesMolecular Sequence DataBacteroidetesBiologybiology.organism_classification16S ribosomal RNAApplied Microbiology and BiotechnologyMicrobiologyHalophileMicrobiologyBacterial Typing TechniquesMediterranean seaGenusRNA Ribosomal 16SBotanyMediterranean SeaSeawaterEcology Evolution Behavior and SystematicsPhylogenySystematic and applied microbiology
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New records of leatherback sea turtle, Dermochelys coriacea (Vandelli, 1761) (Testudines: Dermochelyidae) in the Strait of Sicily

2017

We report three new records of leatherback sea turtle, Dermochelys coriacea (Vandelli, 1761) recovered in February 2011 and in spring-summer 2016 in the Strait of Sicily. The individuals were handed over dead to the IZS of Palermo for necropsy. The first specimen measured 139 and 91 cm of CCL and CCW respectively and was found beached and alive but died a few hours later for septicemia. The second measured 110 cm of CCL and 83 cm of CCW and showed a deep wound on its head probably due to contact with a boat propeller. The third individual measured 134 cm of CCL and 96 cm of CCW and had plastic bags, a piece of fishing net and debris of various nature in the stomach. For the second individua…

Strait of SicilyBycatchStrandingMediterranean SeaSettore BIO/05 - ZoologiaDermochelys coriaceaChelonian conservation
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