Results 1 to 10 of about 248,448 (207)

Discrimination factors of carbon and nitrogen stable isotopes in meerkat feces [PDF]

PeerJ, 2017
Stable isotope analysis of feces can provide a non-invasive method for tracking the dietary habits of nearly any mammalian species. While fecal samples are often collected for macroscopic and genetic study, stable isotope analysis can also be applied to ...
Shaena Montanari
doaj   +4 more sources

Linking mercury, carbon, and nitrogen stable isotopes in Tibetan biota: Implications for using mercury stable isotopes as source tracers. [PDF]

Sci Rep, 2016
Tibetan Plateau is located at a mountain region isolated from direct anthropogenic sources. Mercury concentrations and stable isotopes of carbon, nitrogen, and mercury were analyzed in sediment and biota for Nam Co and Yamdrok Lake.
Xu X, Zhang Q, Wang WX.
europepmc   +2 more sources

Determination Methods and Distribution Characteristics of Nitrogen Isotopes in Different Nitrogenous Components of Crude Oil

Yankuang ceshi, 2023
BACKGROUNDThe distribution of nitrogen isotopes has important significance in paleoclimate, paleo-sedimentary and evolutionary characteristics. Nitrogen is one of the important heteroatomic elements in crude oil.
Min LI, Jing QIN, Yang BAI, Chen HE, Xuemin XU, Jianfa CHEN   +5 more
doaj   +1 more source

Population-specific sex and size variation in long-term foraging ecology of belugas and narwhals [PDF]

Royal Society Open Science, 2021
Intraspecific variation in resource use by individuals of different age, sex or size may reflect differing energetic requirements and physiological constraints.
Marie Louis, Mikkel Skovrind, Eva Garde, Mads Peter Heide-Jørgensen, Paul Szpak, Eline D. Lorenzen   +5 more
doaj   +1 more source

Isotopic Fingerprinting: A Promising Tool for Coffee Authenticity Checks

Proceedings, 2023
Almost every physical or chemical process in nature favors certain light stable isotopes over others, and thereby leaves an isotopic “fingerprint” on the substances involved.
Johannes Wintel, Corina Knipper, Mila Spross, Ronny Friedrich, Steffen Schwarz   +4 more
doaj   +1 more source

Nitrogen isotopes of Eichhornia crassipes (water hyacinth) confirm sewage as leading source of pollution in Hartbeespoort Reservoir, South Africa

South African Journal of Science, 2022
Nitrogen (N) isotopes of aquatic organisms offer a way of differentiating sources of dissolved nitrate species in water. Water quality in the Hartbeespoort Reservoir has been a problem for many decades, causing excessive growth of algae and water ...
Ryno Germishuys, Roger Diamond
doaj   +1 more source

Estimates of woody biomass and mixed effects improve isoscape predictions across a northern mixed forest

Frontiers in Ecology and Evolution, 2023
Contemporary methods used to predict isotopic variation at regional scales have yet to include underlying distributions of the abundance of isotopic substrates.
John L. Berini, John L. Berini, Bryan Runck, Jody Vogeler, David L. Fox, James D. Forester, James D. Forester   +6 more
doaj   +1 more source

Inter-Laboratory Comparison of Measuring Organic Carbon and Stable Nitrogen Isotopes in Marine Sediments by Elemental Analysis-Isotope Ratio Mass Spectrometry

Yankuang ceshi, 2020
BACKGROUND Organic carbon and nitrogen stable isotopes (δ13C, δ15N) in marine sediments are used as effective indicators to trace the changes of air, temperature, precipitation and other parameters in different geological time. Elemental analysis-isotope
CHANG Wen-bo, LI Feng, ZHANG Yuan-yuan, HE Xing-liang   +3 more
doaj   +1 more source

Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone

Nature Communications, 2021
To explore the importance of local vs. global sulfur-cycle controls on variations in pyrite sulfur isotopes, the authors couple carbon-nitrogen-sulfur concentrations and stable isotopes of sediments from the Peruvian oxygen minimum zone, identifying a ...
Virgil Pasquier, David A. Fike, Itay Halevy   +2 more
doaj   +1 more source

Dissolved Nitrogen Acquisition in the Symbioses of Soft and Hard Corals With Symbiodiniaceae: A Key to Understanding Their Different Nutritional Strategies?

Frontiers in Microbiology, 2021
Nitrogen is one of the limiting nutrients for coral growth and primary productivity. Therefore, the capacity of different associations between corals and their algal symbionts (Symbiodiniaceae) to efficiently exploit the available nitrogen sources will ...
Chloé A. Pupier, Chloé A. Pupier, Renaud Grover, Maoz Fine, Maoz Fine, Cécile Rottier, Jeroen A. J. M. van de Water, Christine Ferrier-Pagès   +7 more
doaj   +1 more source