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Article: The effects of acidification on the stable isotope signatures of marine algae and molluscs

TitleThe effects of acidification on the stable isotope signatures of marine algae and molluscs
Authors
KeywordsSample treatment
Inorganic carbon
Carbonates
Temporal variation
Issue Date2007
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/marchem
Citation
Marine Chemistry, 2007, v. 103 n. 1-2, p. 97-102 How to Cite?
AbstractCarbon (13C) and nitrogen (15N) stable isotope analysis has become increasingly important in the study of energy flow and tropho-dynamics in many ecosystems. Prior to analysis, samples are often pre-treated with acids to remove inorganic carbonates which may bias the results. The effects of pre-analysis acidification on isotopic values are, however, still poorly understood for marine producers (e.g. algae and cyanobacteria), and consumers (e.g. molluscs), which may confound the comparability of different studies. In this study, such effects (untreated vs. decalcified samples) were examined at two different sampling periods (summer and winter). Acidification did not seem to affect the isotopic composition of consumers, but reduced both δ13C and δ15N of producers. This effect was consistent for the two sampling periods, although both producers and consumers had more enriched δ13C and δ15N values in summer. Acidification had the most distinct, negative effect on the isotopic values of samples which had low carbonate contents. It is, therefore, important to be aware of temporal variations in sample isotopic values and especially the effects of sample treatment when attempting to compare different studies. As an attempt to standardize protocols, it is recommended that only acid-washing carbonate-rich samples is adopted as the most appropriate pre-analysis treatment.
Persistent Identifierhttp://hdl.handle.net/10722/73227
ISSN
2015 Impact Factor: 3.412
2015 SCImago Journal Rankings: 1.389
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNg, JSSen_HK
dc.contributor.authorWai, TCen_HK
dc.contributor.authorWilliams, GAen_HK
dc.date.accessioned2010-09-06T06:49:20Z-
dc.date.available2010-09-06T06:49:20Z-
dc.date.issued2007en_HK
dc.identifier.citationMarine Chemistry, 2007, v. 103 n. 1-2, p. 97-102en_HK
dc.identifier.issn0304-4203en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73227-
dc.description.abstractCarbon (13C) and nitrogen (15N) stable isotope analysis has become increasingly important in the study of energy flow and tropho-dynamics in many ecosystems. Prior to analysis, samples are often pre-treated with acids to remove inorganic carbonates which may bias the results. The effects of pre-analysis acidification on isotopic values are, however, still poorly understood for marine producers (e.g. algae and cyanobacteria), and consumers (e.g. molluscs), which may confound the comparability of different studies. In this study, such effects (untreated vs. decalcified samples) were examined at two different sampling periods (summer and winter). Acidification did not seem to affect the isotopic composition of consumers, but reduced both δ13C and δ15N of producers. This effect was consistent for the two sampling periods, although both producers and consumers had more enriched δ13C and δ15N values in summer. Acidification had the most distinct, negative effect on the isotopic values of samples which had low carbonate contents. It is, therefore, important to be aware of temporal variations in sample isotopic values and especially the effects of sample treatment when attempting to compare different studies. As an attempt to standardize protocols, it is recommended that only acid-washing carbonate-rich samples is adopted as the most appropriate pre-analysis treatment.-
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/marchemen_HK
dc.relation.ispartofMarine Chemistryen_HK
dc.rightsMarine Chemistry. Copyright © Elsevier BV.en_HK
dc.subjectSample treatment-
dc.subjectInorganic carbon-
dc.subjectCarbonates-
dc.subjectTemporal variation-
dc.titleThe effects of acidification on the stable isotope signatures of marine algae and molluscsen_HK
dc.typeArticleen_HK
dc.identifier.emailWai, TC: waitakcheung@hotmail.comen_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityWai, TC=rp00797en_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.identifier.doi10.1016/j.marchem.2006.09.001-
dc.identifier.hkuros125941en_HK
dc.identifier.volume103-
dc.identifier.issue1-2-
dc.identifier.spage97-
dc.identifier.epage102-
dc.identifier.isiWOS:000243681700008-
dc.publisher.placeNetherlands-

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