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Sampling consistency matters-Stable isotopes (δ15N and δ13C) exhibit wide variation among individuals within bee species native to North America (Hymenoptera: Apidae). [PDF]

J Insect Sci
Tsalickis A, Campbell JW, Duffy M, Vachula RS.   +3 more
europepmc   +1 more source

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Carbon stable isotopes as indicators of coastal eutrophication

Ecological Applications, 2014
Coastal ecologists and managers have frequently used nitrogen stable isotopes (δ15N) to trace and monitor sources of anthropogenic nitrogen (N) in coastal ecosystems. However, the interpretation of δ15N data can often be challenging, as the isotope values fractionate substantially due to preferential retention and uptake by biota.
Autumn, Oczkowski, Erin, Markham, Alana, Hanson, Cathleen, Wigand   +3 more
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The geochemistry of the stable carbon isotopes

Geochimica et Cosmochimica Acta, 1953
Abstract Several hundred samples of carbon from various geologic sources have been analyzed in a new survey of the variation of the ratio C13/C12 in nature. Mass spectrometric determinations were made on the instruments developed by H. C. Urey and his co-workers utilizing two complete feed systems with magnetic switching to determine small ...
H. Craig
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Forest cover controls the nitrogen and carbon stable isotopes of rivers.

Science of the Total Environment, 2022
Deforestation affects the ecological integrity of rivers and streams, threatening biodiversity and ecosystem services worldwide. However, few studies have strictly analyzed the effect of the functional responses of tropical streams to changes in forest ...
Fausto Machado-Silva, Vinicius Neres‐Lima, Andréa Franco de Oliveira, T. Moulton   +3 more
semanticscholar   +1 more source

Stable carbon isotopes in human tissues

Nature, 1978
ON studying the distribution of 14C from nuclear weapon tests in a wide range of human tissues, it was observed that significant modification of 14C/12C isotopic ratio had occurred, largely as a function of variable carbon renewal rates1,2. As a parallel exercise, 13C/12C isotope ratios have been assayed, 13C and 12C being the nonradioactive isotopes ...
T D, Lyon, M S, Baxter
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Oxygen and carbon stable isotopes of Mytilus galloprovincialis Lamarck, 1819 shells as environmental and provenance proxies

The Holocene, 2019
Mollusc shell stable isotopes are commonly used to reconstruct past environmental conditions. However, despite being abundant components of natural and anthropogenic fossil accumulations, the geochemical composition of mussel shells (Mytilus spp.) has ...
Stefania Milano, B. Schöne, Igor Gutiérrez-Zugasti   +2 more
semanticscholar   +1 more source

Stable Carbon and Nitrogen Isotopic

Aquatic Geochemistry, 2004
The perennially ice-covered lakes in the McMurdo Dry Valleys, Antarctica, are part of the coldest and driest ecosystem on earth. To understand lacustrine carbon and nitrogen cycling in this end-member ecosystem, and to define paleolimnological proxies for ice-covered lakes, we measured the stable carbon and nitrogen isotopic composition of particulate ...
Jennifer Lawson, Peter T Doran, Fabien Kenig, David J Des marais, John C Priscu   +4 more
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Mercury and Stable Isotopes of Carbon and Nitrogen in Mink

Environmental Toxicology and Chemistry, 2007
Abstract Total Hg concentrations and values of stable isotopes (δ15N, δ13C) in tissues of mink (Mustela vison) captured in Rhode Island (USA) during winters of 1999 to 2004 were statistically distinct based on location. Mink captured in salt marsh environments (salt marsh group mink [SMGM]) had significantly lower mean Hg concentrations ...
James L, Lake, Stephan A, Ryba, Jonathan, Serbst, Charles F, Brown, Lori, Gibson   +4 more
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Stable Isotope Geochemistry of Various Carbonates

John Heinrichs Scholarly & Creative Activities Day, 2021
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Jenna Howard, Kaiden O'Dell, Riley Sanford, Matthew Tuttle, Jerrad Watts, Mitchell Lukens   +5 more
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The separation of stable isotopes of carbon

Russian Chemical Reviews, 1989
The present state of work on the separation of carbon isotopes by diffusion, fractional distillation, chemical isotopic exchange, and the selective excitation and dissociation of molecules in electrical discharges or in the field of laser radiation has been examined.
E D Oziashvili, A S Egiazarov
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