Search results for "Padina pavonica"

showing 5 items of 5 documents

Interspecific variation in total phenolic content in temperate brown algae

2017

Marine algae synthesize secondary metabolites such as polyphenols that function as defense and protection mechanisms. Among brown algae, Fucales and Dictyotales (Phaeophyceae) contain the highest levels of phenolic compounds, mainly phlorotannins, that play multiple roles. Four temperate brown algae (Cystoseira amentacea, Cystoseira compressa, Dictyopteris polypodioides and Padina pavonica) were studied for total phenolic contents. Total phenolic content was determined colorimetrically with the Folin-Ciocalteu reagent. Significant differences in total phenolic content were observed between leathery and sheetlike algae and also within each morphological group. Among the four species, the she…

0106 biological sciencesPhaeophyceaePadina pavonicamacromolecular substancesPlant Science010501 environmental sciencesBiology01 natural sciencesGeneral Biochemistry Genetics and Molecular BiologySecondary metaboliteAlgaeBotanyMediterranean SeaTemperate climateSettore BIO/04 - Fisiologia Vegetalelcsh:QH301-705.5External and internal factorTotal phenolic content0105 earth and related environmental sciencesExternal and internal factorsSecondary metabolitesSettore BIO/02 - Botanica Sistematica010604 marine biology & hydrobiologyBiochemistry (medical)DictyotalesInterspecific competitionbiology.organism_classificationBrown algaelcsh:Biology (General)PolyphenolSettore BIO/03 - Botanica Ambientale E ApplicataFucalesJournal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale
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Seaweed fails to prevent ocean acidification impact on foraminifera along a shallow-water CO2 gradient

2014

Ocean acidification causes biodiversity loss, alters ecosystems, and may impact food security, as shells of small organisms dissolve easily in corrosive waters. There is a suggestion that photosynthetic organisms could mitigate ocean acidification on a local scale, through seagrass protection or seaweed cultivation, as net ecosystem organic production raises the saturation state of calcium carbonate making seawater less corrosive. Here, we used a natural gradient in calcium carbonate saturation, caused by shallow-water CO2 seeps in the Mediterranean Sea, to assess whether seaweed that is resistant to acidification (Padina pavonica) could prevent adverse effects of acidification on epiphytic…

0106 biological sciencesSettore BIO/07 - Ecologia010504 meteorology & atmospheric sciencesPadina pavonica01 natural sciencesForaminiferaBlue carbonchemistry.chemical_compoundEcosystem14. Life underwaterEcology Evolution Behavior and SystematicsOriginal Research0105 earth and related environmental sciencesNature and Landscape ConservationBlue carbonbiologyEcologyEcologyShallow-water CO<inf>2</inf> seep010604 marine biology & hydrobiologyOcean acidificationBenthic foraminiferaCoastal communitieshallow-water CO2 seepsOcean acidification15. Life on landbiology.organism_classificationcoastal communitiesEcology Evolution Behavior and SystematicSeagrassCalcium carbonatechemistry13. Climate actionCalcareous
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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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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 …

macroalgaelcsh:QH1-199.5Padina pavonicaocean acidificationOcean Engineeringphenolic compoundslcsh:General. Including nature conservation geographical distributionAquatic SciencePhotosynthetic efficiencyOceanographyPhotosynthesisNutrientAlgaeBotanyMarine Sciencelcsh:ScienceWater Science and TechnologyGlobal and Planetary ChangephotosynthesisbiologyDictyotalesbiology.organism_classificationphotophysiologyEnvironmental chemistrylcsh:Qnutrient availabilityFucalesEutrophicationFrontiers in Marine Science
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