Characterization of riparian species and stream detritus using multiple stable isotopes

Oecologia ◽  
1996 ◽  
Vol 107 (2) ◽  
pp. 232-238 ◽  
Author(s):  
J. Vaun McArthur ◽  
Kevin K. Moorhead
Keyword(s):  
Stable Isotopes ◽  
Riparian Species

CHARACTERIZATION OF NITROGEN AND CARBON STABLE ISOTOPES IN EPIPHYTIC FORAMINIFERAL MORPHOTYPES

2016 ◽  
Vol 46 (3) ◽  
pp. 271-284 ◽  
Author(s):  
Guillem Mateu-Vicens ◽  
Teresa Sebastián ◽  
Anna Khokhlova ◽  
Maria del Mar Leza ◽  
Salud Deudero
Keyword(s):  
Stable Isotopes ◽  
Carbon Stable Isotopes

Ecological and isotopic discrimination of syntopic rodents in a neotropical rain forest of French Guiana

2003 ◽  
Vol 19 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Jean-François Mauffrey ◽  
François Catzeflis
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
Rain Forest ◽  
French Guiana ◽  
Ecological Studies ◽  
Carbon Isotope Ratios ◽  
Photosynthetic Pathways ◽  
Feeding Process ◽  
Neotropical Rain Forest

Stable isotopes are commonly used in ecological studies to infer food resources (Ambrose & DeNiro 1986, Bocherens et al. 1990,1991,1994;Yoshinaga et al. 1991) since isotopic composition is conserved during the feeding process. Moreover,for herbivorous (sensu lato) species, it is often possible to identify the main resource because different photosynthetic pathways generate different values of carbon isotope ratios (Park & Epstein 1961, Sternberg et al. 1984). This allows the characterization of broad biota such as savannas or forest and discrimination of grazers from sympatric folivorous species (DeNiro & Epstein 1978).

Characterization of the region and year of production of wines by stable isotopes and elemental analyses

OENO One ◽  
1995 ◽  
Vol 29 (2) ◽  
pp. 75
Author(s):  
M. Day ◽  
Ben Li Zhang ◽  
Gérard J. Martin ◽  
Christian Asselin ◽  
René Morlat
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Meteorological Data ◽  
Point Of View ◽  
Metallic Elements ◽  
Basic Aspect ◽  
O Isotopes ◽  
Elemental Analyses ◽  
Use Efficiency

<p style="text-align: justify;">Stable isotope and elemental analyses were applied to the study of wines produced from the Cabernet Franc vine variety cultivated during several years (1982 to 1990) on specific parts of the Saumur-Champigny vineyard dedicated to the « terroir » experiment of INRA. The purpose of this work was to describe the behaviour or <sup>2</sup>H, <sup>13</sup>C and <sup>18</sup>O isotopes in the water and ethanol of wines in terms of the meteorological conditions (temperature, precipitation and insolation) which govern vine growing. Since the « terroir » concept involves a synergy between the c1imate and the soil, the distribution of typical metallic elements was also determined by flame and electrothermal ionization atomic absorption. About twenty parcels, carefully described from the geological and pedological point of view were considered in this study which demonstrated the ability of Sr, Al and Rb to discriminate between wines from the same year but grown on adjacent parcels. The content in trace elements of the wines was also shown to be correlated with the geological nature of the soil. As far as stable isotopes are considered, it appears that the climate of the year of production of a given region has a drastic influence on the isotope ratios of water and ethanol of wines and good correlations way be computed between these parameters and temperature and precipitations. From a more basic aspect, it is also shown that the nature of the soil which governs, at least in a part, the water use efficiency of vine, induces typical variations in the isotopic composition of wines. The results of this study demonstrate also the ability of stable isotope and elemental analyses to determine the geographical origin of a wine, and when the region of production is known, to infer the year of production from meteorological data. This method might prove to be an alternative method to radio carbon analysis for the next vintages.</p>

Characterization of Commercial Slovenian and Cypriot Fruit Juices Using Stable Isotopes

2009 ◽  
Vol 57 (15) ◽  
pp. 6764-6769 ◽  
Author(s):  
Nives Ogrinc ◽  
Karmen Bat ◽  
Iztok JoŽe KoŠir ◽  
Terezija Golob ◽  
Rebecca Kokkinofta
Keyword(s):  
Stable Isotopes ◽  
Fruit Juices

scholarly journals PHYSICOCHEMICAL AND ISOTOPIC CHARACTERIZATION OF FORMATION WATERS FROM OIL FIELDS IN THE SERGIPE BASIN, BRAZIL

2014 ◽  
Vol 32 (3) ◽  
pp. 531
Author(s):  
Danilo R. Sá Teles ◽  
Antônio Expedito G. de Azevedo ◽  
Alexandre B. Costa ◽  
Maria R. Zucchi ◽  
Alexandre A. Ferreira
Keyword(s):  
Stable Isotopes ◽  
Isotopic Exchange ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Oil Fields ◽  
Northeastern Brazil ◽  
Formation Water ◽  
Water Formation ◽  
Isotopic Characterization

ABSTRACT. This paper presents a study of the physicochemical and isotopic characteristics of formation waters from the Castanhal, Siririzinho and Aguilhadafields in the Sergipe Basin, northeastern Brazil. In each of the samples, pH, conductivity, concentration of dissolved inorganic carbon (DIC), δ18O, δ2H, and δ13C weremeasured. These measurements are used to identify isotopic similarities among waters from local aquifers, which can be used as a proxy for groundwater connectivitywith formation water. Formation waters from the Castanhal and Siririzinho fields are enriched in deuterium, as evidenced by their δ2H values above the Global MeteoricWater Line (GMWL), which may be a result of significant isotopic exchange between water and H2S. These measurements are in accordance with the large enrichment in13C of DIC resulting from biodegradation, with the formation of methane depleted in 13C and CO2 enriched in 13C. These results indicate interaction between formationwater with rocks and other fluids.Keywords: stable isotopes, dissolved inorganic carbon, biodegradation. RESUMO. Este trabalho apresenta um estudo das características físico-químicas e isotópicas de águas de formação dos campos Castanhal, Siririzinho e Aguilhada, localizados na Bacia de Sergipe, nordeste do Brasil. Em cada uma das amostras foram medidos os parâmetros pH, condutividade elétrica, concentração de carbonoinorgânico dissolvido (CID), δ18O, δ2H e δ13C. A partir dos resultados obtidos, foi possível identificar a similaridade isotópica com as águas de aquíferos locais,indicando conexão de água subterrânea com água de formação. As águas de formação dos campos Castanhal e Siririzinho apresentaram um enriquecimento em deutério,resultado da troca isotópica entre a água e o H2S. Também foi verificado, um grande enriquecimento no δ13C do CID, resultado dos processos de biodegradação coma formação de metano empobrecido em 13C e CO2 enriquecido neste isótopo. Os resultados encontrados indicam interação entre a água de formação com as rochas ecom outros fluidos.Palavras-chave: isótopos estáveis, carbono inorgânico dissolvido, biodegradação.

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