Document Detail


Effect of acidification on elemental and isotopic compositions of sediment organic matter and macro-invertebrate muscle tissues in food web research.
MedLine Citation:
PMID:  20872625     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Stable isotope techniques in food web studies often focus on organic carbon in food sources which are subsequently assimilated in the tissue of consumer organisms through diet. The presence of non-dietary carbonates in bulk samples can affect their δ(13)C values, altering how their results are interpreted. Acidification of samples is a common practice to eliminate any inorganic carbon present prior to analysis. We examined the effects of pre-analysis acidification on two size fractions of sediment organic matter (SOM) from marine and freshwater wetlands and pure muscle tissue of a common freshwater invertebrate (Cherax destructor). The elemental content and isotopic ratios of carbon and nitrogen were compared between paired samples of acidified and control treatments. Our results showed that acidification does not affect the elemental or isotopic values of freshwater SOM. In the marine environment acidification depleted the δ(13)C and δ(15)N values of the fine fraction of saltmarsh and δ(15)N values of mangrove fine SOM. Whilst acidification did not change the elemental content of invertebrate muscle tissue, the δ(13)C and δ(15)N values were affected. We recommend to researchers considering using acidification techniques on material prepared for stable isotope analysis that a formal assessment of the effect of acidification on their particular sample type should be undertaken. Further detailed investigation to understand the impact of acidification on elemental and isotopic values of organic matter and muscular tissues is required.
Authors:
Debashish Mazumder; Jordan Iles; Jeff Kelleway; Tsuyoshi Kobayashi; Lisa Knowles; Neil Saintilan; Suzanne Hollins
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Rapid communications in mass spectrometry : RCM     Volume:  24     ISSN:  1097-0231     ISO Abbreviation:  Rapid Commun. Mass Spectrom.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-27     Completed Date:  2010-12-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8802365     Medline TA:  Rapid Commun Mass Spectrom     Country:  England    
Other Details:
Languages:  eng     Pagination:  2938-42     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 John Wiley & Sons, Ltd.
Affiliation:
Australian Nuclear Science and Technology Organisation, Locked Bag 2001 Kirrawee DC, NSW 2232, Australia. debashish.mazumder@ansto.gov.au
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MeSH Terms
Descriptor/Qualifier:
Animals
Carbon Isotopes / chemistry
Carbonates / chemistry
Decapoda (Crustacea)*
Food Chain*
Freshwater Biology
Geologic Sediments / chemistry*
Hydrogen-Ion Concentration
Marine Biology
Mass Spectrometry
Muscles / chemistry*
Nitrogen Isotopes / chemistry
Chemical
Reg. No./Substance:
0/Carbon Isotopes; 0/Carbonates; 0/Nitrogen Isotopes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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