scholarly journals Metabolic control of nitrogen isotope composition of amino acids in macroalgae and gastropods: implications for aquatic food web studies

2007 ◽  
Vol 342 ◽  
pp. 85-90 ◽  
Author(s):  
Y Chikaraishi ◽  
Y Kashiyama ◽  
NO Ogawa ◽  
H Kitazato ◽  
N Ohkouchi
Keyword(s):  
Amino Acids ◽  
Food Web ◽  
Metabolic Control ◽  
Isotope Composition ◽  
Nitrogen Isotope ◽  
Aquatic Food Web ◽  
Web Studies ◽  
Nitrogen Isotope Composition ◽  
Aquatic Food

Assigning hydrogen, carbon, and nitrogen isotope values for phytoplankton and terrestrial detritus in aquatic food web studies

Inland Waters ◽  
2014 ◽  
Vol 4 (2) ◽  
pp. 233-242 ◽  
Author(s):  
Carol Yang ◽  
Grace Wilkinson ◽  
Jonathan Cole ◽  
Stephen Macko ◽  
Michael Pace
Keyword(s):  
Food Web ◽  
Nitrogen Isotope ◽  
Aquatic Food Web ◽  
Web Studies ◽  
Carbon And Nitrogen ◽  
Aquatic Food

Dynamics of bacteria–substrate stable isotope separation: dependence on substrate availability and implications for aquatic food web studies

2008 ◽  
Vol 65 (9) ◽  
pp. 1983-1990 ◽  
Author(s):  
Daryl J. McGoldrick ◽  
David R. Barton ◽  
Michael Power ◽  
Ryan W. Scott ◽  
Barbara J. Butler
Keyword(s):  
Food Web ◽  
Exponential Growth Phase ◽  
Substrate Availability ◽  
Aquatic Food Web ◽  
Fish Food ◽  
Web Studies ◽  
Isotopic Signatures ◽  
C And N ◽  
Isotopic Separation ◽  
Aquatic Food

Heterotrophic bacteria growing without substrate limitation discriminate against the heavier stable isotopes of C and N, which is reflected in the isotopic signatures of consumers of bacteria. We measured bacteria and substrate isotopic separation (C and N) during glucose and ammonium uptake by three strains of bacteria ( Pseudomonas putida , Bacillus megaterium , and Enterobacter aerogenes ) grown in batch culture at 4 and 30 °C. Isotopic separation between bacteria and substrate was dependent on substrate availability. Higher discrimination against the heavier isotopes, and therefore more depleted δ13C and δ15N values of bacterial biomass, were observed during the exponential growth phase when the nutrient supply was in excess of the demand. We also compared the isotopic ratios of Chironomus tentans grown on aged macrophyte detritus and commercial fish food. Isotopic signatures of Chironomus larvae grown on fish food were within the ranges typical of one trophic step, whereas larvae grown on detritus were strongly depleted in13C, suggesting assimilation of bacteria that had grown on the C-rich detritus. Our results are consistent with the very few other studies of bacterial fractionation of nonlimiting nutrients and may also explain the frequent observation of unexpectedly depleted isotopic signatures in aquatic food web studies.

scholarly journals Determination of aquatic food-web structure based on compound-specific nitrogen isotopic composition of amino acids

2009 ◽  
Vol 7 (11) ◽  
pp. 740-750 ◽  
Author(s):  
Yoshito Chikaraishi ◽  
Nanako O. Ogawa ◽  
Yuichiro Kashiyama ◽  
Yoshinori Takano ◽  
Hisami Suga ◽  
...  
Keyword(s):  
Amino Acids ◽  
Isotopic Composition ◽  
Food Web ◽  
Aquatic Food Web ◽  
Food Web Structure ◽  
Web Structure ◽  
Nitrogen Isotopic Composition ◽  
Aquatic Food

scholarly journals Nitrogen isotope composition of amino acids reveals trophic partitioning in two sympatric amphipods

2020 ◽  
Vol 10 (19) ◽  
pp. 10773-10784
Author(s):  
Matias Ledesma ◽  
Elena Gorokhova ◽  
Henry Holmstrand ◽  
Andrius Garbaras ◽  
Agnes M. L. Karlson
Keyword(s):  
Amino Acids ◽  
Isotope Composition ◽  
Nitrogen Isotope ◽  
Nitrogen Isotope Composition ◽  
Trophic Partitioning
Sign in / Sign up

Export Citation Format

Share Document