Search results for "Cystoseira"

showing 10 items of 39 documents

Efficacia delle AMP nella conservazione della biodiversità: i popolamenti a Cystoseira nell’AMP “Capo Gallo-Isola delle Femmine” (PA)

2011

Present-day Mediterranean marine biodiversity is undergoing rapid alteration. Species belonging to genus Cystoseira (biological “formers” of habitat structure) are strongly affected by variations of the environmental conditions (pollution, turbidity, etc.); modification, regression and disappearance of these “canopy-forming algae” have been yet observed in different areas of the Mediterranean Sea. Parks and MPAs, aimed at protecting marine environments, are certainly a central component of conservation strategies and a very successful way to preserve marine biodiversity. The aim of this paper was to assess the current state of Cystoseira assemblages inside the MPA “Capo Gallo-Isola delle Fe…

Life SciencesAMP Cystoseira canopies biodiversità conservazione
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The invasive seaweed Asparagopsis taxiformis erodes the habitat structure and biodiversity of native algal forests in the Mediterranean Sea

2021

Abstract Invasive seaweeds are listed among the most relevant threats to marine ecosystems worldwide. Biodiversity hotspots, such as the Mediterranean Sea, are facing multiple invasions and are expected to be severely affected by the introduction of new non-native seaweeds in the near future. In this study, we evaluated the consequences of the shift from the native Ericaria brachycarpa to the invasive Asparagopsis taxiformis habitat on the shallow rocky shores of Favignana Island (Egadi Islands, MPA, Sicily, Italy). We compared algal biomass and species composition and structure of the associated epifaunal assemblages in homogenous and mixed stands of E. brachycarpa and A. taxiformis. The r…

Marine protected areaBiodiversityAquatic ScienceOceanographyRocky shoreEpifauna diversityCystoseira sensu latoMediterranean SeaMarine ecosystemHabitat shiftSicilyEcosystemAlgaBiomass (ecology)biologyPrimary producersEcologyEricaria brachycarpaBiodiversityGeneral MedicineEutrophicationSeaweedbiology.organism_classificationPollutionRocky shoreGeographyHabitatAsparagopsis taxiformisSpecies richness
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Short-term effect of human trampling on the upper infralittoral macroalgae of Ustica Island MPA (western Mediterranean, Italy)

2002

The short-term response of Mediterranean upper infralittoral macroalgal species to experimental human trampling was investigated. Disturbances of six different intensities were applied within the integral reserve of the Ustica Island marine protected area (Italy, Mediterranean Sea). The dominant macroalgal species Cystoseira brachicarpa v. balearica and Dictyota mediterranea were strongly affected by human trampling. Higher levels of disturbance significantly affected both algal percentage cover and canopy at an increasing rate. Three months after trampling, for both variables it was highlighted that the algal recovery from disturbance was incomplete, being significantly different among tra…

Mediterranean climateCanopyMediterranean seabiologyEcologyCommunity structurePlant coverEnvironmental scienceMarine protected areaAquatic ScienceCystoseiraTramplingbiology.organism_classificationJournal of the Marine Biological Association of the United Kingdom
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Antibacterial activity and HPLC analysis of extracts from Mediterranean brown algae

2020

The antibacterial activity of methanolic extracts of eight Mediterranean brown algae belonging to the genera Cystoseira sensu lato, Dictyopteris and Padina was investigated. Extracts from Sargassaceae showed antibacterial activity. Specifically, Carpodesmia crinita and Carpodesmia brachycarpa extracts inhibited the growth of the Gram-positive strain Kocuria rhizophila whereas Cystoseira compressa and Carpodesmia amentacea extracts showed antibacterial activity against the Gram-positive strains, Kocuria rhizophila and Staphylococcus aureus. None of them inhibited the growth of the Gram-negative bacterium Escherichia coli. The extracts of Cystoseira sp. pl. and Treptacantha ballesterosii did …

Mediterranean climatemethanolic extractPlant ScienceBiologyCystoseirabrown algaeSettore BIO/19 - Microbiologia Generale01 natural sciences03 medical and health sciencesSensuBotanyMediterranean SeaSettore BIO/04 - Fisiologia VegetaleEcology Evolution Behavior and Systematics030304 developmental biology0303 health sciencesHplc analysis010405 organic chemistrySettore BIO/02 - Botanica SistematicaSettore CHIM/06 - Chimica Organicabiology.organism_classificationphenol compoundpolar metabolites0104 chemical sciencesBrown algaeAntibacterial activityAntibacterial activityPlant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
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Seawater carbonate chemistry and percentage cover of macroalgal species at three locations at Vulcano, Italy

2017

Beneficial effects of CO2 on photosynthetic organisms will be a key driver of ecosystem change under ocean acidification. Predicting the responses of macroalgal species to ocean acidification is complex, but we demonstrate that the response of assemblages to elevated CO2 are correlated with inorganic carbon physiology. We assessed abundance patterns and a proxy for CO2:HCO3- use (delta 13C values) of macroalgae along a gradient of CO2 at a volcanic seep, and examined how shifts in species abundance at other Mediterranean seeps are related to macroalgal inorganic carbon physiology. Five macroalgal species capable of using both HCO3- and CO2 had greater CO2 use as concentrations increased. Th…

Ocean Acidification International Coordination Centre (OA-ICC)TemperateRegistration number of speciesSalinityCaulerpa proliferaCommunity composition and diversityBicarbonate ion standard deviationUdotea petiolatainorganicAlkalinity total standard deviationAlkalinitySargassum muticumDictyota dichotomaHalopteris scopariaYearsCystoseira brachycarpaExperimentTemperature waterCarbon inorganic dissolvedCystoseira foeniculaceaCaulerpa racemosaCalculated using seacarb after Nisumaa et al 2010Cystoseira foeniculataAragonite saturation stateAlkalinity totaltotalCO2 ventpHTemperaturedissolvedCarbonate ionPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Acetabularia acetabulumJania rubensCarbon dioxide standard deviationEarth System Researchδ13CLipid contentstandard deviationField observationUniform resource locator link to referenceCystoseira crinitaCoverageCalcite saturation stateLocationwaterSiteRocky-shore communityFigureBenthosUniform resource locator/link to referenceOcean Acidification International Coordination Centre OA ICCMediterranean SeaCarbon inorganic dissolved standard deviationTypeBicarbonate ionDictyopteris polypodioidesDilophus fasciolaCalculated using seacarb after Nisumaa et al. (2010)SpeciesCystoseira compressaEvent labelCarbonate system computation flagpH standard deviationCarbonate ion standard deviationMassFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonOxygenPartial pressure of carbon dioxide water at sea surface temperature wet airCarbon dioxideRocky shore communityEntire communityFugacity of carbon dioxide water at sea surface temperature wet airPadina pavonicaSeasonδ13C standard deviationCoast and continental shelfCodium bursaTableCystoseira barbarta
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Macroalgal responses to ocean acidification depend on nutrient and light levels

2015

Ocean acidification may benefit algae that are able to capitalize on increased carbon availability for photosynthesis, but it is expected to have adverse effects on calcified algae through dissolution. Shifts in dominance between primary producers will have knock-on effects on marine ecosystems and will likely vary regionally, depending on factors such as irradiance (light vs. shade) and nutrient levels (oligotrophic vs. eutrophic). Thus experiments are needed to evaluate interactive effects of combined stressors in the field. In this study, we investigated the physiological responses of macroalgae near a CO2 seep in oligotrophic waters off Vulcano (Italy). The algae were incubated in situ …

Ocean Acidification International Coordination Centre (OA-ICC)TemperateSalinityChlorophyll aFucoxanthininorganicAlkalinityPhotosynthetic efficiency standard errorChlorophyll cNitrogen content per dry mass standard errorLight saturation point standard errorPhenolics allTemperature waterCarbon inorganic dissolvedMacroalgaeCalculated using seacarb after Nisumaa et al 2010Carbon Nitrogen ratioAragonite saturation stateAlkalinity totalallCarbon per dry massSalinity standard errortotalCarbon content per dry mass standard errorPhenolics all standard errorCO2 ventChromistapHMaximum photochemical quantum yield of photosystem II standard errorTemperaturePartial pressure of carbon dioxide (water) at sea surface temperature (wet air) standard errordissolvedAntioxidant activity standard errorCarbonate ionMaximum photochemical quantum yield of photosystem IIPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Field experimentstandard errorNitrogen content per dry massElectron transport rate standard errorFucoxanthin standard errorEarth System ResearchViolaxanthinPhenolicsChlorophyll a standard errorCarbon dioxide standard errorPotentiometric titrationCalcite saturation stateCarbon/Nitrogen ratio standard errorNitrogenOchrophytaPotentiometricper dry masswaterChlorophyll c standard errorBenthosAlkalinity total standard errorAntioxidant activityElectron transport rateLight saturation pointOcean Acidification International Coordination Centre OA ICCMacro-nutrientsMediterranean SeaNitrogen per dry massBicarbonate ionTemperature water standard errorCalculated using seacarb after Nisumaa et al. (2010)Primary production PhotosynthesisSpeciespH standard errorCalcite saturation state standard errorCystoseira compressaCalculated using CO2SYSNon photochemical quenchingCarbon content per dry massCarbonate system computation flagViolaxanthin standard errorPrimary production/PhotosynthesisFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonCarbon/Nitrogen ratioBiomass/Abundance/Elemental compositionTreatmentPartial pressure of carbon dioxide water at sea surface temperature wet airAragonite saturation state standard errorCarbon dioxideMacro nutrientsCarbonate ion standard errorSingle speciesFugacity of carbon dioxide water at sea surface temperature wet airPadina pavonicaBiomass Abundance Elemental compositionCoast and continental shelfPhotosynthetic efficiencyBicarbonate ion standard errorNon photochemical quenching standard error
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Valutazione dello stato di conservazione dei popolamenti a Cystoseira nell’AMP Capo Gallo-Isola delle Femmine (PA): osservazioni preliminari

2008

Settore BIO/02 - Botanica SistematicaConservazione Cystoseira Mediterraneo
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Valutazione dello stato di conservazione dei popolamenti a Cystoseira lungo le coste della Sicilia nord-occidentale: osservazioni preliminari

2006

Settore BIO/02 - Botanica SistematicaConservazione Cystoseira Mediterraneo
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Human activities trigger change in marine landscape

2018

Biodiversity is undergoing rapid and worrying changes, partially driven by anthropogenic activities. Human impacts and climate change (e.g. increasing temperature and ocean acidification), which act at different spatial scale, represent the most serious threats to biodiversity and ecosystem structure and function. In this overview, the effects of anthropogenic pressures on unique and valuable Mediterranean systems, such as Cystoseira sp. pl. forest and Posidonia oceanica meadows, are examined. These complex systems, characterized by a high associated biodiversity, are regularly exposed to natural and anthropogenic pressures. Due to the central role they have for several important ecological…

Settore BIO/02 - Botanica SistematicaSettore BIO/03 - Botanica Ambientale E ApplicataBiodiversity Cystoseira forest stressors Posidonia oceanica meadows Mediterranean Sea
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Macroalgae transplant to detect the occurrence of anthropogenic nutrients in seawater of highly tourist beaches in Mediterranean islands

2020

In the Mediterranean region, islands are among the most important tourist destinations, being sites of considerable naturalistic, historical and cultural importance. This is highly beneficial for local economies, but may also represent a threat for the environment, especially during the peak season (i.e. summer). Indeed, the sharp demographic increase concentrated in a relatively short period may negatively affect the quality of coastal marine systems and the provision of ecosystem services, producing in turn negative feedbacks on tourism industry. Nevertheless, the assessment of the environmental impact of tourism on coastal seawater has been seldom addressed. Here, we show the results of …

Settore BIO/07 - Ecologia0106 biological sciencesEcologybusiness.industry010604 marine biology & hydrobiologyEcological ModelingGeography Planning and DevelopmentEnvironmental resource managementseaweed Cystoseira biomonitoring stable isotope mapping tourism anthropic impactContext (language use)010501 environmental sciences01 natural sciencesEcosystem servicesTransplantationGeographyEcosystemEnvironmental impact assessmentWater qualitybusinessEcology Evolution Behavior and SystematicsSustainable tourismTourism0105 earth and related environmental sciencesEcological Questions
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