Search results for " Stable Isotopes"

showing 3 items of 83 documents

Benthic foodweb structure in a large shallow lake studied by stable isotope analysis

2014

The benthic foodweb structure of Lake Võrtsjärv, a large (270 km2), shallow, and turbid Estonian lake, was evaluated based on C and N stable-isotope signatures (δ13C, δ15N). Variation in δ13C between sampling sites was not related to site proximity to the littoral zone or the more vegetated southern part of the lake, but rather appeared to be influenced by in-situ site peculiarities. δ13C was stable temporally and between functional feeding groups, a result implying that the whole benthic food web of the lake relies largely on the same C source admixture, essentially particulate organic matter (POM). Thus, the foodweb composition of Lake Võrtsjärv is remarkably homogeneous given the lake’s …

trophic levelsEcologyδ13CEcologyta1172macroinvertebratesδ15Nbenthic food websAquatic ScienceFood webOceanographyBenthic zonemethane-oxidizing bacteriacarbon sourceLittoral zoneEnvironmental sciencecarbon and nitrogen stable isotopesLake VõrtsjärvEcology Evolution Behavior and SystematicsIsotope analysisInvertebrateTrophic levelFreshwater Science
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The Use of Stable Isotope Ratio Analysis to Trace European Sea Bass (D. labrax) Originating from Different Farming Systems

2020

This study aimed to determine whether isotopic ratio mass spectrometry (IRMS) can discriminate farmed European sea bass according to different farming systems and geographic origins. Dicentrarchus labrax of commercial size from three different rearing systems (concrete tank inland, sea cages, and extensive methods in valleys or salt works) were collected at the trading period (autumn&ndash

δ18Ostable isotopesgeographic origin01 natural sciencesArticle0404 agricultural biotechnologyAquacultureSettore AGR/20 - Zoocolturelcsh:ZoologyDicentrarchus labrax<i>Dicentrarchus labrax</i>lcsh:QL1-991Settore BIO/06 - Anatomia Comparata E CitologiaSea bassIsotope-ratio mass spectrometryaquaculture; Dicentrarchus labrax; stable isotopes; traceability; farming system; geographic origin; IRMS; sea bass; fish; authenticationfishaquaculture Dicentrarchus labrax stable isotopes traceability farming system geographic origin IRMS sea bass fish authenticationlcsh:Veterinary medicineGeneral Veterinaryδ13CbiologyStable isotope ratiobusiness.industry010401 analytical chemistry04 agricultural and veterinary sciencesδ15NIRMSbiology.organism_classification040401 food science0104 chemical sciencesFisherytraceabilityaquaculturelcsh:SF600-1100authenticationEnvironmental sciencefarming systemAnimal Science and ZoologyDicentrarchusbusinesssea bassAnimals
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Italica (Seville, Spain): use of local marble in Augustan age

2010

This study concerns 51 marble finds made of “Cipollino verde” coming from the ancient city of Italica (north of the modern city of Santiponce, 9 km NW of Seville, Spain), the earliest Roman settlement in Spain, founded in 206 B.C. The aim of this work was to determine their provenance from Greek and Italian quarries or from local quarries worked in the Iberian Peninsula. Thin-section optical microscopy, X-ray powder diffraction, bulk rock chemistry and O, C and Sr stable isotope analyses were carried out. Results were compared with literature data on “Cipollino verde” marbles quarried in southern Euboea (Greece), Apuan Alps (Italy), Almería, Extremoz, Seville (Spain) and Évora (Portugal). T…

“Cipollino verde” marble; mineralogy; petrography; geochemistry; stable isotopes; Italica; Spainarchaeometry; cipollino verde marble; mineralogy; stable isotopes; spain; italica; roman age; clay samples; pottery; viminacium; petrography; cipollino verde" marble; geochemistrySpainstable isotope“Cipollino verde” marblemineralogyItalicaSettore GEO/09 -Georis. Miner.e Appl.Mineral.-Petrogr. per l'Ambi.ed i B.Cult.petrographygeochemistry
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