Search results for "Lag"

showing 10 items of 3124 documents

Functional consequences of prey acclimation to ocean acidification for the prey and its predator

2016

Ocean acidification is the suite of chemical changes to the carbonate system of seawater as a consequence of anthropogenic carbon dioxide (CO2) emissions. Despite a growing body of evidences demonstrating the negative effects of ocean acidification on marine species, the consequences at the ecosystem level are still unclear. One factor limiting our ability to upscale from species to ecosystem is the poor mechanistic understanding of the functional consequences of the observed effects on organisms. This is particularly true in the context of species interactions. The aim of this work was to investigate the functional consequence of the exposure of a prey (the mussel Brachidontes pharaonis) t…

Condition indexRegistration number of speciesSalinityTemperateBottles or small containers/Aquaria (<20 L)inorganicAlkalinityBrachidontes pharaonisIncubation durationExperimentTemperature waterCarbon inorganic dissolvedAssimilation efficiencyEriphia verrucosaBreaking loadCalculated using seacarb after Nisumaa et al 2010Aragonite saturation stateAlkalinity totalBottles or small containers Aquaria 20 LtotalpHTemperaturePartial pressure of carbon dioxide (water) at sea surface temperature (wet air) standard errordissolvedCarbonate ionLaboratory experimentPartial pressure of carbon dioxide (water) at sea surface temperature (wet air)standard errorEarth System ResearchUniform resource locator link to referenceanimal structuresCalcite saturation stateArthropodaLengthwaterGrowth MorphologyFigureBenthosUniform resource locator/link to referenceMediterranean SeaAnimaliaBehaviourBicarbonate ionTime in secondsTypeTemperature water standard errorCalculated using seacarb after Nisumaa et al. (2010)SpeciespH standard errorCalcite saturation state standard errorGrowth rateBottles or small containers/Aquaria (&lt;20 L)Calculated using CO2SYSfungiCarbonate system computation flagFugacity of carbon dioxide (water) at sea surface temperature (wet air)CarbonTreatmentAragonite saturation state standard errorPartial pressure of carbon dioxide water at sea surface temperature wet airCarbon dioxideMolluscaGrowth/MorphologyBenthic animalsFugacity of carbon dioxide water at sea surface temperature wet airCoast and continental shelfSpecies interaction
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The Origin of Isolated Populations of the Mountain Weevil, Liparus glabrirostris—The Flagship Species for Riparian Habitats

2020

AbstractLiparus glabrirostris is one of the largest European weevils, and it has been recently proposed as the flagship species for threatened riparian habitats in the mountains. For effective conservation of its populations (and associated habitats), it is crucial to understand its history, contemporary distribution, genetic diversity and predict changes in the range, including its highly isolated populations on the Baltic coast. Here, we examined numerous populations of L. glabrirostris across almost the entire species range using phylogeography and species niche modeling (SNM) approaches. Analyses of mtDNA and nucDNA markers revealed the existence of 2 major mitochondrial lineages genera…

Conservation geneticsGenetic MarkersConservation of Natural ResourcesRange (biology)Species distributionBiologyphylogeographyspecies distribution modelingDNA MitochondrialCurculionidaeGeneticsFlagship speciesAnimalsMolecular BiologyGenetics (clinical)EcosystemRiparian zoneCell Nucleusgeographygeography.geographical_feature_categoryEcologyEnvironmental niche modellingEuropeColeopteraPhylogeographyGenetics PopulationRefugiumconservation geneticsThreatened speciesWeevilsBiotechnologyJournal of Heredity
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Conservation genetics of insular **Podarcis** lizards using partial cytochrome b sequences

1998

Sequence data derived from a 306 bp fragment of mitochondrial cytochrome b and molecular variance estimates were used to investigate the genetic population structure of the endangered and endemic lizard Podarcis atrata of the Columbretes archipelago (Mediterranean, Spain). Our results show a very high and significant among-population genetic differentiation. FST values and phylogenetic analyses confirm the evolutionary distinctiveness of P. atrata populations, suggesting that the populations of these islands deserve special protection measures. The populations of the two islands Columbrete Grande and Mancolibre are less differentiated than those of Foradada and Lobo, and seem to have retain…

Conservation geneticsgeographygeography.geographical_feature_categorybiologyPhylogenetic treeLizardCytochrome bPodarcisZoologybiology.organism_classificationbiology.animalparasitic diseasesArchipelagoGeneticsMainlandMediterranean IslandsEcology Evolution Behavior and SystematicsMolecular ecology
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Mediterranean bioconstructions along the Italian coast

2018

Marine bioconstructions are biodiversity-rich, three-dimensional biogenic structures, regulating key ecological functions of benthic ecosystems worldwide. Tropical coral reefs are outstanding for their beauty, diversity and complexity, but analogous types of bioconstructions are also present in temperate seas. The main bioconstructions in the Mediterranean Sea are represented by coralligenous formations, vermetid reefs, deep-sea cold-water corals, Lithophyllum byssoides trottoirs, coral banks formed by the shallow-water corals Cladocora caespitosa or Astroides calycularis, and sabellariid or serpulid worm reefs. Bioconstructions change the morphological and chemicophysical features of prima…

Conservation of Natural ResourcesAnthropogenic pressures; Biodiversity; Ecosystem engineers; Habitat formers; Animals; Conservation of Natural Resources; Italy; Mediterranean Sea; Biodiversity; Coral Reefs; Environmental Monitoring; Ecology Evolution Behavior and Systematics; Aquatic ScienceLithophyllum byssoides trottoirEvolutioncoral banksAnthropogenic pressuresAquatic SciencebioconstructionAnthropogenic pressures; Biodiversity; Ecosystem engineers; Habitat formers; Ecology Evolution Behavior and Systematics; Aquatic ScienceHabitat formerssabellariidcoralligenous formationsCORAL CLADOCORA-CAESPITOSA; MACROALGAL CORALLIGENOUS ASSEMBLAGES; SABELLARIA-ALVEOLATA LINNAEUS; NORTHERN ADRIATIC SEA; BETA-DIVERSITY; ASTROIDES-CALYCULARIS; OCEAN ACIDIFICATION; SPATIAL VARIATION; MASS-MORTALITY; HABITAT CHARACTERIZATIONbioconstructionsBehavior and SystematicsAnthropogenic pressureMediterranean SeaAnimalscoralligenous formationcoral bankConservation of Natural Resourcebioconstructions; coralligenous formations; vermetid reefs; deep-sea cold-water coral; Lithophyllum byssoides trottoirs; coral banks; sabellariid; serpulid worm reefsLithophyllum byssoides trottoirsEcologydeep-sea cold-water coralAnimalCoral Reefsserpulid worm reefsBiodiversityvermetid reefsEcology Evolution Behavior and SystematicItalyEcosystem engineerEcosystem engineersHabitat formerCoral Reefvermetid reefEnvironmental Monitoring
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Mediterranean rocky reefs in the Anthropocene: Present status and future concerns

2021

Global change is striking harder and faster in the Mediterranean Sea than elsewhere, where high levels of human pressure and proneness to climate change interact in modifying the structure and disrupting regulative mechanisms of marine ecosystems. Rocky reefs are particularly exposed to such environmental changes with ongoing trends of degradation being impressive. Due to the variety of habitat types and associated marine biodiversity, rocky reefs are critical for the functioning of marine ecosystems, and their decline could profoundly affect the provision of essential goods and services which human populations in coastal areas rely upon. Here, we provide an up-to-date overview of the statu…

Conservation of Natural ResourcesBioconstructionFish assemblageCoral ReefsAlgal forests; Bioconstructions; Coastal ecosystems; Conservation; Fish assemblages; Global change; Marine biodiversityClimate ChangeBiodiversityConservationFish assemblagesCoastal ecosystemsAlgal forestMediterranean SeaBioconstructionsHumansAlgal forestsCoastal ecosystemMarine biodiversityGlobal changeAlgal forests; Bioconstructions; Coastal ecosystems; Conservation; Fish assemblages; Global change; Marine biodiversity; Climate Change; Conservation of Natural Resources; Coral Reefs; Humans; Mediterranean Sea; Biodiversity; EcosystemEcosystem
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Utility of island populations in re-introduction programmes--relationships between Arabian gazelles (Gazella arabica) from the Farasan Archipelago an…

2014

Understanding local adaptation and population differentiation is vital to the success of re-introduction initiatives. As other mammals living on islands, Arabian gazelles (G. arabica) show reduced body size on the Farasan archipelago, which we corroborated in this study through morphometric analyses of skulls. In the light of the steep population decline on the Arabian Peninsula – but stable population development on the archipelago – we tested the potential suitability of Farasan gazelles as a source for re-introductions on the mainland. We therefore investigated genetic differentiation between Farasan and mainland populations using eleven nuclear microsatellite loci and detected a distinc…

Conservation of Natural ResourcesPopulationEndangered speciesSaudi ArabiaBiologyEvolution MolecularPeninsulaparasitic diseasesCaptive breedingGeneticsAnimalseducationEcology Evolution Behavior and SystematicsLocal adaptationIslandsPopulation Densityeducation.field_of_studygeographygeography.geographical_feature_categoryEcologyEndangered SpeciesGenetic VariationAdaptation PhysiologicalhumanitiesPopulation declineGenetics PopulationAntelopesArchipelagoMainlandgeographic locationsMicrosatellite RepeatsMolecular ecology
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Italian marine reserve effectiveness: does enforcement matter?

2008

Marine protected areas (MPAs) have become popular tools worldwide for ecosystem conservation and fishery management. Fish assemblages can benefit from protection provided by MPAs, especially those that include fully no-take reserves. Fish response to protection can thus be used to evaluate the effectiveness of marine reserves. Most target fish are high-level predators and their overfishing may affect entire communities through trophic cascades. In the Mediterranean rocky sublittoral, marine reserves may allow fish predators of sea urchins to recover and thus whole communities to be restored from coralline barrens to macroalgae. Such direct and indirect reserve effects, however, are likely t…

Conservation; Enforcement; Fish assemblages; Marine reserves; Mediterranean SeaENFORCEMENTConservationFish assemblagesFOOD WEBSMarine reservesMediterranean SeaEcosystemTrophic cascadeEnforcementEcology Evolution Behavior and SystematicsNature and Landscape ConservationNature reserveMARINE PROTECTED AREASVISUAL-CENSUSOverfishingEcologyMarine reserves; Fish assemblages; Conservation; EnforcementMarine reserveMEDITERRANEAN SEAREEF FISH ASSEMBLAGESRECOVERYFisheryGeographyMarine protected areaFisheries managementEnforcement
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Tecniche conservative di gestione del suolo in ambiente mediterraneo: risultati di un ventennio di sperimentazioni.

2013

Conservative systemNo tillageMediterranean environmentSettore AGR/02 - Agronomia E Coltivazioni Erbacee
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Constraint qualifications and Lagrange multipliers in nondifferentiable programming problems

1994

In this paper, we present several constraint qualifications, and we show that these conditions guarantee the nonvacuity and the boundedness of the Lagrange multiplier sets for general nondifferentiable programming problems. The relationships with various constraint qualifications are investigated.

Constraint (information theory)Constraint algorithmsymbols.namesakeMathematical optimizationControl and OptimizationComputingMilieux_THECOMPUTINGPROFESSIONApplied MathematicsLagrange multiplierTheory of computationsymbolsManagement Science and Operations ResearchConstraint satisfactionMathematicsJournal of Optimization Theory and Applications
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Etude d'un emmanchement fretté compte tenu de l'effet combiné des défauts de forme et d'état de surface

2012

The main purpose of this thesis is to present two contributions in the field of shrink fitassembly taking into account the defects of form and roughness surfaces. The first contributionconcerns the study of the influence of the defect forme on the characteristics of shrinked assemblyusing an approach based on finite element modeling. We found that this defect has a significantinfluence on the resistance of the assembly. The work already done in the laboratory of mechanicsat the University of Bourgogne have been confirmed. In the second contribution, we proposed tointegrate the surface defects (roughness) by creating a homogenized finite element interface. Thistechnique has facilitated the m…

Contact modelingShrink assembly[ SPI.OTHER ] Engineering Sciences [physics]/Other[PHYS.COND.CM-GEN] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other][SPI.OTHER] Engineering Sciences [physics]/OtherModélisation du contactMechanical fasteningAssemblages frettés[ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]MachiningFixation mécaniqueUsinage
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