Seasonal differences of stable isotope composition and lipid content in four bivalve species from the Adriatic Sea

In this study, we compare the stable isotope composition of oxygen and carbon of wines from four Central and Southeastern European countries and from Argentina to study the similarities and differences in the isotope signatures and, thus, the potential of differentiation of the various wine-growing countries. We observe similar trends for wines from Austria, Slovenia, and Romania with respect to the vintages 2008 and 2009, which are absent in the Montenegrin and Argentinean samples. It is speculated that the weather develops similarly for Austria, Slovenia, and Romania, as these countries are positioned at a similar latitude and not too far away from each other (general central and eastern European weather situation), whereas Montenegro is not influenced by the latter being situated farther south and dominantly influenced by the Adriatic Sea. Investigations on further vintages are needed to test this assumption.

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Interactive effects of urea and lipid content confound stable isotope analysis in elasmobranch fishes

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2015-0584 ◽

2017 ◽

Vol 74 (3) ◽

pp. 419-428 ◽

Cited By ~ 29

Author(s):

Aaron B. Carlisle ◽

Steven Y. Litvin ◽

Daniel J. Madigan ◽

Kady Lyons ◽

Jennifer S. Bigman ◽

...

Keyword(s):

Stable Isotope ◽

Stable Isotope Analysis ◽

Lipid Content ◽

Isotope Composition ◽

North Pacific Ocean ◽

Lipid Extraction ◽

Isotope Analysis ◽

Interactive Effects ◽

Stable Isotope Composition ◽

Elasmobranch Fishes

Stable isotope analysis (SIA) is becoming a commonly used tool to study the ecology of elasmobranchs. However, the retention of urea by elasmobranchs for osmoregulatory purposes may bias the analysis and interpretation of SIA data. We examined the effects of removing urea and lipid on the stable isotope composition of 14 species of sharks, skates, and rays from the eastern North Pacific Ocean. While effects were variable across taxa, removal of urea generally increased δ15N and C:N. Urea removal had less influence on δ13C, whereas extracting urea and lipid generally increased δ15N, C:N, and δ13C. Because C:N values of nonextracted tissues are often used to infer lipid content and adjust δ13C, shifts in C:N following urea extraction will change the inferred lipid content and bias any mathematical adjustment of δ13C. These results highlight the importance of urea and lipid extraction and demonstrate the confounding effects of these compounds, making it impossible to use C:N of non-urea-extracted samples as a diagnostic tool to estimate and correct for lipid content in elasmobranch tissues.

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BASIN TCP STABLE ISOTOPE COMPOSITION OF CO2 IN TERRESTRIAL ECOSYSTEMS

ORNL Distributed Active Archive Center Datasets ◽

10.3334/ornldaac/963 ◽

2010 ◽

Author(s):

C.T. LAI, ◽

J.R. EHLERINGER,

Keyword(s):

Stable Isotope ◽

Isotope Composition ◽

Terrestrial Ecosystems ◽

Stable Isotope Composition

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Ontogenetic trends in resource partitioning and trophic geography of sympatric skates (Rajidae) inferred from stable isotope composition across eye lenses

Marine Ecology Progress Series ◽

10.3354/meps13030 ◽

2019 ◽

Vol 624 ◽

pp. 103-116 ◽

Cited By ~ 5

Author(s):

SJ Simpson ◽

DW Sims ◽

CN Trueman

Keyword(s):

Stable Isotope ◽

Resource Partitioning ◽

Isotope Composition ◽

Stable Isotope Composition

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Determining the stable isotope composition of porewater using low temperature multi-step extraction for low water content soils

Journal of Hydrology ◽

10.1016/j.jhydrol.2021.126079 ◽

2021 ◽

Vol 596 ◽

pp. 126079

Author(s):

Sanyuan Jiang ◽

Wenbo Rao ◽

Liangfeng Han

Keyword(s):

Stable Isotope ◽

Low Temperature ◽

Water Content ◽

Isotope Composition ◽

Stable Isotope Composition

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Multi-regression analysis between stable isotope composition and hydrochemical parameters in karst springs to provide insights into groundwater origin and subsurface processes: regional application to Lebanon

Environmental Earth Sciences ◽

10.1007/s12665-021-09519-4 ◽

2021 ◽

Vol 80 (6) ◽

Author(s):

Reda ElGhawi ◽

Karlo Pekhazis ◽

Joanna Doummar

Keyword(s):

Regression Analysis ◽

Stable Isotope ◽

Isotope Composition ◽

Stable Isotope Composition ◽

Hydrochemical Parameters ◽

Karst Springs ◽

Groundwater Origin

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Chemical and stable isotope composition of surface and groundwater in the surroundings of the Los Humeros Caldera, Puebla, Mexico

E3S Web of Conferences ◽

10.1051/e3sconf/20199807013 ◽

2019 ◽

Vol 98 ◽

pp. 07013

Author(s):

Thomas Kretzschmar ◽

Matteo Lelli ◽

Ruth Alfaro ◽

Juan Ignacio Sanchez ◽

Yann Rene Ramos

Keyword(s):

Stable Isotope ◽

Isotope Composition ◽

Regression Line ◽

Sustainable Use ◽

Geothermal Reservoir ◽

Maximum Temperature ◽

Stable Isotope Composition ◽

Local Fracture ◽

Hydrogeological Model ◽

Fracture Systems

It is important to develop a regional hydrogeological model to identify possible recharge and discharge areas for a sustainable use of a geothermal reservoir. The Los Humeros geothermal area is situated within five surficial watersheds and coveres an area of more than 15.000 km2. A total of 208 well and spring samples were collected between June 2017 and November 2018. The stable isotope data for this region define a regression line of δDH2O = 8.032·δ18O + 12 and indicate that groundwater is recharged by regional precipitation. At least 39 groundwater wells, with a maximum temperature of 35 °C, show temperatures above the reported mean average surface temperature of 15 °C. Characteristic elements for geothermal reservoir fluids (B, Li, As) are also present in these groundwaters, indicating a possible connection between the reservoir fluid and the local groundwater through local fracture systems. Concentration of B in these hot wells is between 150 and 35000 ppb.

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