Chrysanthemi Flos ‘Hangbaiju’ (HBJ) is a common Chinese medicinal material with the same origin as and edible cognate plant in China, whose quality seriously affected by place of origin. In this study, four stable isotope ratios (δ15N, δ2H, δ13C, δ18O) 44 elements were detected analyzed 191 HBJ flower samples from six locations China to trace HBJ. An ANOVA analysis δ15N, δ18O values, well milti...

Mercury (Hg) pollution in the ocean is an issue of global concern, however bioaccumulation regimes this ubiquitous pollutant marine apex predators have important knowledge gaps. Our fish length and stable isotope (δ15N δ13C) normalized data Greenland halibut (GH) (Reinhardtius hippoglossoides) showed that Hg fillet tissue decreased by ~35–50 %, over a ten-year period from 2006 to 2015 (n = 7 in...

Nitrogen stable isotopes (δ15N) of organic matter can aid in the reconstruction food webs and, when applied to fossil systems, may help resolve uncertainty about trophic position and provide tests for hypotheses developed using traditional paleoecological techniques. However, order use those values reconstruct relationships ecosystems assess changes their dynamics, an understanding variability ...

Using stable isotope analyses of N and C we present preliminary evidence of marine-derived nutrients from introduced Chinook salmon (Oncorhynchus tshawytscha Walbaum) in stream food webs of Laguna Los Patos, NW Patagonia. Similar to values reported within Chinook salmon's native distributional range periphyton and aquatic insects are the trophic levels that show the greatest enrichment of δ15N ...

available online at http://meteoritics.org 721 © The Meteoritical Society, 2005. Printed in USA. In situ survey of graphite in unequilibrated chondrites: Morphologies, C, N, O, and H isotopic ratios Smail MOSTEFAOUI1*, Ernst ZINNER2, Peter HOPPE1, Frank J. STADERMANN2, and Ahmed EL GORESY1 1Max-Planck-Institut für Chemie, Postfach 3060, 55020 Mainz, Germany 2Laboratory for Space Sciences and Ph...

Carbon and nitrogen are among the most important biogenic elements in terrestrial ecosystems, carbon stable isotopes (δ13C δ15N) often used to indicate sources of turnover processes, study C N coupling can provide more precise indications. To this end, was conducted investigate effects different land use types on soil organic (SOC), (SON) relationship C-N isotopes, as well reveal seasonal varia...

The water shrew Chimarrogale platycephala is an endangered species in Japan. Although immediate conservation actions are necessary, detailed information on this inadequate. We compared dietary trends obtained via C. digestive contents analysis with those through stable isotope (δ13C, δ15N, ‰) of non-invasive body hair and invasive muscles to elucidate their diet evaluate usefulness the analysis...

The natural abundances of stable carbon (C) and nitrogen (N) isotopes (δ13C δ15N) are extensively used to indicate the C N biogeochemical cycles at large spatial scales. However, patterns δ13C δ15N in plant-soil systems grasslands northern China their main driving factors across regional climatic gradient still not well understood. We measured plant soil compositions as associated environmental...

In this study, the isotopic composition (δ13C and δ15N), total organic carbon content, nitrogen C/N ratios of suspended particulate matter (POM) in Zhanjiang Bay, which is a semi-enclosed bay with concentrated artificial activities Southern China, were analyzed order to investigate seasonal variations principal POM sources monsoon region. summer, δ13C δ15N values showed weak correlation chlorop...