Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum
Identifieur interne : 001228 ( Istex/Corpus ); précédent : 001227; suivant : 001229Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum
Auteurs : M. Luce ; M. Levasseur ; M. G. Scarratt ; S. Michaud ; S. Royer ; R. Kiene ; C. Lovejoy ; M. Gosselin ; M. Poulin ; Y. Gratton ; M. LizotteSource :
- Journal of Geophysical Research: Oceans [ 0148-0227 ] ; 2011-09.
Abstract
The distribution and biological cycling of the climate active trace gas dimethylsulfide (DMS) and its algal precursor dimethylsulfoniopropionate (DMSP) were characterized at 20 stations across the Canadian High Arctic during fall 2007. Transformation rates of DMSP and production rates of DMS from dissolved DMSP (DMSPd) were measured during 3 h onboard incubations with radioactively labeled 35S‐DMSP. Particulate DMSP (DMSPp) in surface waters varied between 2 and 39 nmol L−1 and increased with chlorophyll a (Chl a) concentrations (r = 0.84). DMS concentrations in surface waters ranged from 0.05 to 0.8 nmol L−1 and were positively correlated with DMSPp (r = 0.89) and Chl a (r = 0.74). The DMSPd loss rate constant varied from 0.01 to 0.14 h−1 and was also positively correlated with Chl a concentrations (r = 0.67). The turnover time of the DMSPd pool varied between 0.3 and 3.4 days (mean = 0.96 day). Bacterial DMS production varied between 0.01 and 0.51 nmol L−1 d−1 (mean = 0.14 nmol L−1 d−1). Assuming local steady state conditions at the time scale of a day, the turnover time of the DMS pool based only on production from DMSPd was ∼6 days at the sampling stations. This long turnover time suggests that DMS production was dominated by nonbacterial processes during our study. Our results show that DMS production could persist at low rates in late fall under ice‐free conditions. The magnitude of this production appears to be limited by the low algal and bacterial production prevailing at that time.
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DOI: 10.1029/2010JC006914
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Transformation rates of DMSP and production rates of DMS from dissolved DMSP (DMSPd) were measured during 3 h onboard incubations with radioactively labeled 35S‐DMSP. Particulate DMSP (DMSPp) in surface waters varied between 2 and 39 nmol L−1 and increased with chlorophyll a (Chl a) concentrations (r = 0.84). DMS concentrations in surface waters ranged from 0.05 to 0.8 nmol L−1 and were positively correlated with DMSPp (r = 0.89) and Chl a (r = 0.74). The DMSPd loss rate constant varied from 0.01 to 0.14 h−1 and was also positively correlated with Chl a concentrations (r = 0.67). The turnover time of the DMSPd pool varied between 0.3 and 3.4 days (mean = 0.96 day). Bacterial DMS production varied between 0.01 and 0.51 nmol L−1 d−1 (mean = 0.14 nmol L−1 d−1). Assuming local steady state conditions at the time scale of a day, the turnover time of the DMS pool based only on production from DMSPd was ∼6 days at the sampling stations. This long turnover time suggests that DMS production was dominated by nonbacterial processes during our study. Our results show that DMS production could persist at low rates in late fall under ice‐free conditions. The magnitude of this production appears to be limited by the low algal and bacterial production prevailing at that time.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>M. Luce</name><affiliations><json:string>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</json:string></affiliations></json:item><json:item><name>M. Levasseur</name><affiliations><json:string>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</json:string><json:string>E-mail: maurice.levasseur@bio.ulaval.ca</json:string></affiliations></json:item><json:item><name>M. G. 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Geophys. Res.</title><idno type="pISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><idno type="DOI">10.1002/(ISSN)2156-2202c</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2011-09"></date><biblScope unit="volume">116</biblScope><biblScope unit="issue">C9</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint></monogr><idno type="istex">7479D080842B2083A8DED6B53F265256D569A30D</idno><idno type="DOI">10.1029/2010JC006914</idno><idno type="ArticleID">2010JC006914</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2011</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>The distribution and biological cycling of the climate active trace gas dimethylsulfide (DMS) and its algal precursor dimethylsulfoniopropionate (DMSP) were characterized at 20 stations across the Canadian High Arctic during fall 2007. Transformation rates of DMSP and production rates of DMS from dissolved DMSP (DMSPd) were measured during 3 h onboard incubations with radioactively labeled 35S‐DMSP. Particulate DMSP (DMSPp) in surface waters varied between 2 and 39 nmol L−1 and increased with chlorophyll a (Chl a) concentrations (r = 0.84). DMS concentrations in surface waters ranged from 0.05 to 0.8 nmol L−1 and were positively correlated with DMSPp (r = 0.89) and Chl a (r = 0.74). The DMSPd loss rate constant varied from 0.01 to 0.14 h−1 and was also positively correlated with Chl a concentrations (r = 0.67). The turnover time of the DMSPd pool varied between 0.3 and 3.4 days (mean = 0.96 day). Bacterial DMS production varied between 0.01 and 0.51 nmol L−1 d−1 (mean = 0.14 nmol L−1 d−1). Assuming local steady state conditions at the time scale of a day, the turnover time of the DMS pool based only on production from DMSPd was ∼6 days at the sampling stations. This long turnover time suggests that DMS production was dominated by nonbacterial processes during our study. Our results show that DMS production could persist at low rates in late fall under ice‐free conditions. The magnitude of this production appears to be limited by the low algal and bacterial production prevailing at that time.</p></abstract><abstract style="short"><p>Low but significant DMSP microbial uptake takes place in late fall in the Arctic Microbial DMSP uptake appears to be limited by bacterial production DMS production is low but significant under ice‐free conditions in late fall</p></abstract><textClass><keywords scheme="keyword"><list><head>keywords</head><item><term>Arctic</term></item><item><term>International Polar Year</term></item><item><term>SOLAS</term></item><item><term>climate</term></item><item><term>dimethylsulfide</term></item><item><term>plankton</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>The IPY Circumpolar Flaw Lead and Arctic SOLAS Experiments: Oceanography, Geophysics, and Biogeochemistry of the Amundsen Gulf and Southern Beaufort Sea During a Year of Unprecedented Sea Ice Minima</term></item><item><term>ATMOSPHERIC COMPOSITION AND STRUCTURE</term></item><item><term>Aerosols and particles</term></item><item><term>BIOGEOSCIENCES</term></item><item><term>Microbiology: ecology, physiology and genomics</term></item><item><term>OCEANOGRAPHY: GENERAL</term></item><item><term>Arctic and Antarctic oceanography</term></item><item><term>OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</term></item><item><term>Aerosols</term></item><item><term>Gases</term></item><item><term>Microbiology and microbial ecology</term></item><item><term>Phytoplankton</term></item><item><term>PALEOCEANOGRAPHY</term></item><item><term>Aerosols</term></item><item><term>GEOGRAPHIC LOCATION</term></item><item><term>Antarctica</term></item><item><term>Arctic region</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2010-12-23">Received</change><change when="2011-09-06">Registration</change><change when="2011-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api-v5.istex.fr/document/7479D080842B2083A8DED6B53F265256D569A30D/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="jgrc12025"><header><publicationMeta level="product"><doi>10.1002/(ISSN)2156-2202c</doi><issn type="print">0148-0227</issn><issn type="electronic">2156-2202</issn><idGroup><id type="product" value="JGRC"></id><id type="coden" value="JGREA2"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="JOURNAL OF GEOPHYSICAL RESEARCH: OCEANS">Journal of Geophysical Research: Oceans</title><title type="short">J. Geophys. Res.</title></titleGroup></publicationMeta><publicationMeta level="part" position="90"><doi>10.1002/jgrc.v116.C9</doi><idGroup><id type="focusSection" value="3"></id></idGroup><titleGroup><title type="focusSection" xml:lang="en">Journal of Geophysical Research: Oceans</title></titleGroup><numberingGroup><numbering type="journalVolume" number="116">116</numbering><numbering type="journalIssue">C9</numbering></numberingGroup><coverDate startDate="2011-09">September 2011</coverDate></publicationMeta><publicationMeta level="unit" position="40" type="article" status="forIssue"><doi>10.1029/2010JC006914</doi><idGroup><id type="editorialOffice" value="2010JC006914"></id><id type="society" value="C00G06"></id><id type="unit" value="JGRC12025"></id></idGroup><countGroup><count type="pageTotal" number="8"></count></countGroup><copyright ownership="thirdParty">Copyright 2011 by the American Geophysical Union.</copyright><eventGroup><event type="manuscriptReceived" date="2010-12-23"></event><event type="manuscriptRevised" date="2011-08-18"></event><event type="manuscriptAccepted" date="2011-09-06"></event><event type="firstOnline" date="2011-11-16"></event><event type="publishedOnlineFinalForm" date="2011-11-16"></event><event type="xmlConverted" agent="SPi Global Converter:AGUv3.44_TO_WileyML3Gv1.0.3 version:1.1; AGU2WileyML3G Final Clean Up v1.0; WileyML 3G Packaging Tool v1.0" date="2013-02-18"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:4.0.1" date="2014-03-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst">n/a</numbering><numbering type="pageLast">n/a</numbering></numberingGroup><subjectInfo><subject href="http://psi.agu.org/specialSection/IPYCFLEXP1">The IPY Circumpolar Flaw Lead and Arctic SOLAS Experiments: Oceanography, Geophysics, and Biogeochemistry of the Amundsen Gulf and Southern Beaufort Sea During a Year of Unprecedented Sea Ice Minima</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0305">Aerosols and particles</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0465">Microbiology: ecology, physiology and genomics</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/4200">OCEANOGRAPHY: GENERAL</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/4207">Arctic and Antarctic oceanography</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/4801">Aerosols</subject><subject href="http://psi.agu.org/taxonomy5/4820">Gases</subject><subject href="http://psi.agu.org/taxonomy5/4840">Microbiology and microbial ecology</subject><subject href="http://psi.agu.org/taxonomy5/4855">Phytoplankton</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4900">PALEOCEANOGRAPHY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4906">Aerosols</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/9310">Antarctica</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/9315">Arctic region</subject></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="jgrc12025-cit-0000" type="self"><author><familyName>Luce</familyName>, <givenNames>M.</givenNames></author>, et al. (<pubYear year="2011">2011</pubYear>), <articleTitle>Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum</articleTitle>, <journalTitle>J. Geophys. Res.</journalTitle>, <vol>116</vol>, C00G06, doi:<accessionId ref="info:doi/10.1029/2010JC006914">10.1029/2010JC006914</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRC.JGRC12025.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="wordTotal" number="6600"></count><count type="figureTotal" number="3"></count><count type="tableTotal" number="1"></count></countGroup><titleGroup><title type="main">Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum</title><title type="short">DISTRIBUTION AND METABOLISM OF DMSP AND DMS IN ARCTIC</title><title type="shortAuthors">Luce <i>et al</i>.</title></titleGroup><creators><creator creatorRole="author" xml:id="jgrc12025-cr-0001" affiliationRef="#jgrc12025-aff-0001"><personName><givenNames>M.</givenNames> <familyName>Luce</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0002" affiliationRef="#jgrc12025-aff-0001"><personName><givenNames>M.</givenNames> <familyName>Levasseur</familyName></personName><contactDetails><email normalForm="maurice.levasseur@bio.ulaval.ca">maurice.levasseur@bio.ulaval.ca</email></contactDetails></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0003" affiliationRef="#jgrc12025-aff-0002"><personName><givenNames>M. G.</givenNames> <familyName>Scarratt</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0004" affiliationRef="#jgrc12025-aff-0002"><personName><givenNames>S.</givenNames> <familyName>Michaud</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0005" affiliationRef="#jgrc12025-aff-0001"><personName><givenNames>S.‐J.</givenNames> <familyName>Royer</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0006" affiliationRef="#jgrc12025-aff-0003"><personName><givenNames>R.</givenNames> <familyName>Kiene</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0007" affiliationRef="#jgrc12025-aff-0001"><personName><givenNames>C.</givenNames> <familyName>Lovejoy</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0008" affiliationRef="#jgrc12025-aff-0004"><personName><givenNames>M.</givenNames> <familyName>Gosselin</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0009" affiliationRef="#jgrc12025-aff-0005"><personName><givenNames>M.</givenNames> <familyName>Poulin</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0010" affiliationRef="#jgrc12025-aff-0006"><personName><givenNames>Y.</givenNames> <familyName>Gratton</familyName></personName></creator><creator creatorRole="author" xml:id="jgrc12025-cr-0011" affiliationRef="#jgrc12025-aff-0001"><personName><givenNames>M.</givenNames> <familyName>Lizotte</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="CA" type="organization" xml:id="jgrc12025-aff-0001"><orgDiv>Département de Biologie, Québec‐Océan</orgDiv><orgName>Université Laval</orgName><address><city>Quebec City, Quebec</city><country>Canada</country></address></affiliation><affiliation countryCode="CA" type="organization" xml:id="jgrc12025-aff-0002"><orgDiv>Maurice Lamontagne Institute</orgDiv><orgName>Fisheries and Oceans Canada</orgName><address><city>Mont‐Joli, Quebec</city><country>Canada</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrc12025-aff-0003"><orgDiv>Department of Marine Sciences</orgDiv><orgName>University of South Alabama</orgName><address><city>Mobile</city><countryPart>Alabama</countryPart><country>USA</country></address></affiliation><affiliation countryCode="CA" type="organization" xml:id="jgrc12025-aff-0004"><orgDiv>Institut des Sciences de la Mer de Rimouski</orgDiv><orgName>Université du Québec à Rimouski</orgName><address><city>Rimouski, Quebec</city><country>Canada</country></address></affiliation><affiliation countryCode="CA" type="organization" xml:id="jgrc12025-aff-0005"><orgDiv>Research Division</orgDiv><orgName>Canadian Museum of Nature</orgName><address><city>Ottawa, Ontario</city><country>Canada</country></address></affiliation><affiliation countryCode="CA" type="organization" xml:id="jgrc12025-aff-0006"><orgDiv>Centre Eau Terre Environnement</orgDiv><orgName>Institut National de la Recherche Scientifique</orgName><address><city>Quebec City, Quebec</city><country>Canada</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="jgrc12025-kwd-0001">Arctic</keyword><keyword xml:id="jgrc12025-kwd-0002">International Polar Year</keyword><keyword xml:id="jgrc12025-kwd-0003">SOLAS</keyword><keyword xml:id="jgrc12025-kwd-0004">climate</keyword><keyword xml:id="jgrc12025-kwd-0005">dimethylsulfide</keyword><keyword xml:id="jgrc12025-kwd-0006">plankton</keyword></keywordGroup><supportingInformation xml:id="jgrc12025-sup-0000"><p xml:id="jgrc12025-para-0001">Popup box text for aux. mat.: Auxiliary material for this article contains two figures showing oceanographic data collected at 20 stations in the Canadian High Arctic from northern Baffin Bay to the Beaufort Sea through the Northwest Passage, between 1 October and 2 November 2007.</p><p xml:id="jgrc12025-para-0002">Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac).</p><p xml:id="jgrc12025-para-0003">Additional file information is provided in the readme.txt.</p><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrc12025:jgrc12025-sup-0001-readme"></mediaResource><caption>readme.txt</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:01480227:media:jgrc12025:jgrc12025-sup-0002-fs01"></mediaResource><caption>Figure S1. Distribution of water temperature and salinity at 2–3 m across the Canadian High Arctic, from Beaufort Sea to Baffin Bay, during fall 2007.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:01480227:media:jgrc12025:jgrc12025-sup-0003-fs02"></mediaResource><caption>Figure S2. Distribution of total eukaryotic cells >2 <i>μ</i>m, diatoms, dinoflagellates, flagellates, choanoflagellates, ciliates, and other unidentified eukaryotes at 2–3 m across the Canadian High Arctic, from Beaufort Sea to Baffin Bay, during fall 2007.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:01480227:media:jgrc12025:jgrc12025-sup-0004-t01"></mediaResource><caption>Tab‐delimited Table 1.</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="jgrc12025-para-0004" label="1">The distribution and biological cycling of the climate active trace gas dimethylsulfide (DMS) and its algal precursor dimethylsulfoniopropionate (DMSP) were characterized at 20 stations across the Canadian High Arctic during fall 2007. Transformation rates of DMSP and production rates of DMS from dissolved DMSP (DMSPd) were measured during 3 h onboard incubations with radioactively labeled <sup>35</sup>S‐DMSP. Particulate DMSP (DMSPp) in surface waters varied between 2 and 39 nmol L<sup>−1</sup> and increased with chlorophyll <i>a</i> (Chl <i>a</i>) concentrations (r = 0.84). DMS concentrations in surface waters ranged from 0.05 to 0.8 nmol L<sup>−1</sup> and were positively correlated with DMSPp (r = 0.89) and Chl <i>a</i> (r = 0.74). The DMSPd loss rate constant varied from 0.01 to 0.14 h<sup>−1</sup> and was also positively correlated with Chl <i>a</i> concentrations (r = 0.67). The turnover time of the DMSPd pool varied between 0.3 and 3.4 days (mean = 0.96 day). Bacterial DMS production varied between 0.01 and 0.51 nmol L<sup>−1</sup> d<sup>−1</sup> (mean = 0.14 nmol L<sup>−1</sup> d<sup>−1</sup>). Assuming local steady state conditions at the time scale of a day, the turnover time of the DMS pool based only on production from DMSPd was ∼6 days at the sampling stations. This long turnover time suggests that DMS production was dominated by nonbacterial processes during our study. Our results show that DMS production could persist at low rates in late fall under ice‐free conditions. The magnitude of this production appears to be limited by the low algal and bacterial production prevailing at that time.</p></abstract><abstract type="short"><title type="main">Key Points</title><p xml:id="jgrc12025-para-0005"><list style="bulleted"><listItem>Low but significant DMSP microbial uptake takes place in late fall in the Arctic</listItem><listItem>Microbial DMSP uptake appears to be limited by bacterial production</listItem><listItem>DMS production is low but significant under ice‐free conditions in late fall</listItem></list></p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>DISTRIBUTION AND METABOLISM OF DMSP AND DMS IN ARCTIC</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum</title></titleInfo><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Luce</namePart><affiliation>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Levasseur</namePart><affiliation>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</affiliation><affiliation>E-mail: maurice.levasseur@bio.ulaval.ca</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M. G.</namePart><namePart type="family">Scarratt</namePart><affiliation>Maurice Lamontagne Institute, Fisheries and Oceans Canada, Mont‐Joli, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Michaud</namePart><affiliation>Maurice Lamontagne Institute, Fisheries and Oceans Canada, Mont‐Joli, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.‐J.</namePart><namePart type="family">Royer</namePart><affiliation>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Kiene</namePart><affiliation>Department of Marine Sciences, University of South Alabama, Alabama, Mobile, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C.</namePart><namePart type="family">Lovejoy</namePart><affiliation>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Gosselin</namePart><affiliation>Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, Rimouski, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Poulin</namePart><affiliation>Research Division, Canadian Museum of Nature, Ottawa, Ontario, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Y.</namePart><namePart type="family">Gratton</namePart><affiliation>Centre Eau Terre Environnement, Institut National de la Recherche Scientifique, Quebec City, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M.</namePart><namePart type="family">Lizotte</namePart><affiliation>Département de Biologie, Québec‐Océan, Université Laval, Quebec City, Quebec, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2011-09</dateIssued><dateCaptured encoding="w3cdtf">2010-12-23</dateCaptured><dateValid encoding="w3cdtf">2011-09-06</dateValid><edition>Luce, M., et al. (2011), Distribution and microbial metabolism of dimethylsulfoniopropionate and dimethylsulfide during the 2007 Arctic ice minimum, J. Geophys. Res., 116, C00G06, doi:10.1029/2010JC006914.</edition><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent><extent unit="tables">1</extent><extent unit="words">6600</extent></physicalDescription><abstract>The distribution and biological cycling of the climate active trace gas dimethylsulfide (DMS) and its algal precursor dimethylsulfoniopropionate (DMSP) were characterized at 20 stations across the Canadian High Arctic during fall 2007. Transformation rates of DMSP and production rates of DMS from dissolved DMSP (DMSPd) were measured during 3 h onboard incubations with radioactively labeled 35S‐DMSP. Particulate DMSP (DMSPp) in surface waters varied between 2 and 39 nmol L−1 and increased with chlorophyll a (Chl a) concentrations (r = 0.84). DMS concentrations in surface waters ranged from 0.05 to 0.8 nmol L−1 and were positively correlated with DMSPp (r = 0.89) and Chl a (r = 0.74). The DMSPd loss rate constant varied from 0.01 to 0.14 h−1 and was also positively correlated with Chl a concentrations (r = 0.67). The turnover time of the DMSPd pool varied between 0.3 and 3.4 days (mean = 0.96 day). Bacterial DMS production varied between 0.01 and 0.51 nmol L−1 d−1 (mean = 0.14 nmol L−1 d−1). Assuming local steady state conditions at the time scale of a day, the turnover time of the DMS pool based only on production from DMSPd was ∼6 days at the sampling stations. This long turnover time suggests that DMS production was dominated by nonbacterial processes during our study. Our results show that DMS production could persist at low rates in late fall under ice‐free conditions. The magnitude of this production appears to be limited by the low algal and bacterial production prevailing at that time.</abstract><abstract type="short">Low but significant DMSP microbial uptake takes place in late fall in the Arctic Microbial DMSP uptake appears to be limited by bacterial production DMS production is low but significant under ice‐free conditions in late fall</abstract><subject><genre>keywords</genre><topic>Arctic</topic><topic>International Polar Year</topic><topic>SOLAS</topic><topic>climate</topic><topic>dimethylsulfide</topic><topic>plankton</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Oceans</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. Res.</title></titleInfo><genre type="journal">journal</genre><note type="content"> Popup box text for aux. mat.: Auxiliary material for this article contains two figures showing oceanographic data collected at 20 stations in the Canadian High Arctic from northern Baffin Bay to the Beaufort Sea through the Northwest Passage, between 1 October and 2 November 2007. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Popup box text for aux. mat.: Auxiliary material for this article contains two figures showing oceanographic data collected at 20 stations in the Canadian High Arctic from northern Baffin Bay to the Beaufort Sea through the Northwest Passage, between 1 October and 2 November 2007. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Popup box text for aux. mat.: Auxiliary material for this article contains two figures showing oceanographic data collected at 20 stations in the Canadian High Arctic from northern Baffin Bay to the Beaufort Sea through the Northwest Passage, between 1 October and 2 November 2007. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt.Supporting Info Item: readme.txt - Figure S1. Distribution of water temperature and salinity at 2–3 m across the Canadian High Arctic, from Beaufort Sea to Baffin Bay, during fall 2007. - Figure S2. Distribution of total eukaryotic cells >2 μm, diatoms, dinoflagellates, flagellates, choanoflagellates, ciliates, and other unidentified eukaryotes at 2–3 m across the Canadian High Arctic, from Beaufort Sea to Baffin Bay, during fall 2007. - Tab‐delimited Table 1. - </note><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/specialSection/IPYCFLEXP1">The IPY Circumpolar Flaw Lead and Arctic SOLAS Experiments: Oceanography, Geophysics, and Biogeochemistry of the Amundsen Gulf and Southern Beaufort Sea During a Year of Unprecedented Sea Ice Minima</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0305">Aerosols and particles</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0465">Microbiology: ecology, physiology and genomics</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4200">OCEANOGRAPHY: GENERAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4207">Arctic and Antarctic oceanography</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4801">Aerosols</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4820">Gases</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4840">Microbiology and microbial ecology</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4855">Phytoplankton</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4900">PALEOCEANOGRAPHY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4906">Aerosols</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9310">Antarctica</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9315">Arctic region</topic></subject><identifier type="ISSN">0148-0227</identifier><identifier type="eISSN">2156-2202</identifier><identifier type="DOI">10.1002/(ISSN)2156-2202c</identifier><identifier type="CODEN">JGREA2</identifier><identifier type="PublisherID">JGRC</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>116</number></detail><detail type="issue"><caption>no.</caption><number>C9</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>8</total></extent></part></relatedItem><identifier type="istex">7479D080842B2083A8DED6B53F265256D569A30D</identifier><identifier type="DOI">10.1029/2010JC006914</identifier><identifier type="ArticleID">2010JC006914</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2011 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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