Search results for "epiphytes"

showing 5 items of 5 documents

Epiphytic bacteria make an important contribution to heterotrophic bacterial production in a humic boreal lake

2017

Bacterial production (BP) in lakes has generally only been measured in the pelagic zone without accounting for littoral BP, and studies of BP at the whole-lake scale are very scarce. In the dystrophic humic lakes, which are common throughout the boreal region, low light penetration through water has been assumed to seriously limit available habitats for littoral organisms. However, many highly humic boreal lakes have extensive partly submerged vegetation around the lake perimeter which can provide well-lit substrata for highly productive epiphyton. We measured epiphytic BP on the littoral vegetation and pelagic BP in a small highly humic boreal lake in Finland during an open-water season an…

0106 biological sciencesepiphytesperiphytonta1172Heterotrophenvironment and nature studiesAquatic Science010603 evolutionary biology01 natural sciencesjärvetperifytonbakteeritpäällyskasvitBotanylakescarbon cycleLittoral zoneAutotrophPeriphytonbacteriaaineenvaihduntaEcology Evolution Behavior and SystematicsEcology010604 marine biology & hydrobiologyhiilen kiertoPelagic zonepelagicboreaalinen vyöhykeBoreallittoralautotrophicympäristö- ja luonnontietoEpiphytic bacteriaEnvironmental sciencemetabolismheterotrophicAquatic Microbial Ecology
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Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent

2014

We examined the long-term effect of naturally acidified water on a Cymodocea nodosa meadow growing at a shallow volcanic CO2 vent in Vulcano Island (Italy). Seagrass and adjacent unvegetated habitats growing at a low pH station (pH = 7.65 ± 0.02) were compared with corresponding habitats at a control station (pH = 8.01 ± 0.01). Density and biomass showed a clear decreasing trend at the low pH station and the below- to above-ground biomass ratio was more than 10 times lower compared to the control. C content and delta 13C of leaves and epiphytes were significantly lower at the low pH station. Photosynthetic activity of C. nodosa was stimulated by low pH as seen by the significant increase in…

Ocean Acidification International Coordination Centre (OA-ICC)TemperateSalinityChlorophyll ainorganicAlkalinityLight saturation point standard errorPhotosynthetic quantum efficiencyMediterranean Sea Acidification in a Changing Climate MedSeATemperature waterCarbon inorganic dissolvedCalculated using seacarb after Nisumaa et al 2010IrradianceRespiration rate carbonAragonite saturation stateBiomassAlkalinity totalIrradiance standard errortotalCO2 ventCymodocea nodosapHRespirationEpiphytes loadMaximum photochemical quantum yield of photosystem II standard errorNet community production of carbonTemperaturePartial pressure of carbon dioxide (water) at sea surface temperature (wet air) standard errordissolvedRespiration rate carbon standard errorCarbonate ionMaximum photochemical quantum yield of photosystem IIPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)Net community production of carbon standard errorIlluminance standard errorSoft bottom communitystandard errorCarbon inorganic dissolved standard errorRespiration rateElectron transport rate standard errorEarth System Researchδ13CPhotosynthetic quantum efficiency standard errorField observationChlorophyll a standard errorGross primary production of carbonBiomass standard errorCalcium carbonatePotentiometric titrationCalcite saturation stateShoot densityPotentiometricwaterIlluminanceOxygen standard errorBenthosAlkalinity total standard errorMediterranean Sea Acidification in a Changing Climate (MedSeA)Electron transport rateLight saturation pointOcean Acidification International Coordination Centre OA ICCMediterranean SeaGross primary production of carbon standard errorBicarbonate ionSoft-bottom communityδ13C standard errorTemperature water standard errorCalculated using seacarb after Nisumaa et al. (2010)Primary production PhotosynthesisSpeciespH standard errorCarbonate system computation flagloadPrimary production/PhotosynthesisFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonBiomass/Abundance/Elemental compositionTreatmentEpiphytes load standard errorOxygenPartial pressure of carbon dioxide water at sea surface temperature wet airEpiphytes loadCarbon dioxideCarbon standard errorEntire communityFugacity of carbon dioxide water at sea surface temperature wet airGroupBiomass Abundance Elemental compositionCoast and continental shelfEpiphytesShoot density standard errorCalcium carbonate standard error
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Altered epiphyte community and sea urchin diet in Posidonia oceanica meadows in the vicinity of volcanic CO2 vents

2017

Ocean acidification (OA) predicted for 2100 is expected to shift seagrass epiphyte communities towards the dominance of more tolerant non-calcifying taxa. However, little is known about the indirect effects of such changes on food provision to key seagrass consumers. We found that epiphyte communities of the seagrass Posidonia oceanica in two naturally acidified sites (i.e. north and south sides of a volcanic CO2 vent) and in a control site away from the vent at the Ischia Island (NW Mediterranean Sea) significantly differed in composition and abundance. Such differences involved a higher abundance of non-calcareous crustose brown algae and a decline of calcifying polychaetes in both acidif…

Settore BIO/07 - Ecologia0106 biological sciencesAssemblagesPH reductionAlgalGrowthAquatic ScienceOceanography010603 evolutionary biology01 natural sciencesParacentrotus lividusAcidificationAlgaeParacentrotus-lividus lam.Seawater14. Life underwaterHerbivoryClimate-changebiologyEcology010604 marine biology & hydrobiologyCoralline algaeGeneral MedicineEcosystem shiftsbiology.organism_classificationPollutionSeagrass13. Climate actionPosidonia oceanicaEpiphyteCrustoseSeagrass meadowsCoastal waters Coralline algae Calcifying organisms Community composition Epiphytes Global change Gut content Marine ecology Ocean acidification Paracentrotus lividus Seagrass
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Influence of hydrothermal vents on phytobenthic communities in the Aeolian Islands (Tyrrhenian Sea): preliminary results

2010

Settore BIO/07 - Ecologiabenthic marine algae epiphytes shallow hydrothermal vents Posidonia oceanica Tyrrhenian Sea
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Effect of 30 years of road traffic abandonment on epiphytic moss diversity

2014

Road traffic emits a cocktail of pollutants that can influence the vegetation and plant diversity in neighboring areas. However, the recovery potential of bryophytes after traffic abandonment is still little explored. In addition, the effects of the main pollutants of road verges, such as metals and salinity, on moss flora need to be investigated. In our study, we compared the moss richness and diversity in two closely related veteran tree allees of high conservation importance. The allees in Gryżów and Lubrza, Poland, were chosen because of their similarity in age, geographical location, type of surrounding areas, and tree species. The only difference was that the trees in Gryżów had not b…

epiphytesFloraTilia cordataRoad saltingtree conservationBryophytaEpiphytesTilia cordataManagement Monitoring Policy and LawArticleBryopsidaEnvironmental Science(all)OrthotrichumTree conservationmoss monitoringOrthotrichumGeneral Environmental ScienceVehicle EmissionsMoss monitoringAir PollutantsbiologyEcologyGeneral MedicineVegetationbiology.organism_classificationPollutionMossBryopsidaroad saltingGeographyVeteran treeSpecies richnessEpiphytePolandEpiphytesEnvironmental MonitoringEnvironmental Monitoring and Assessment
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