Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin
Identifieur interne : 001809 ( Istex/Corpus ); précédent : 001808; suivant : 001810Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin
Auteurs : Jochen Krauss ; Thomas Schmitt ; Alfred Seitz ; Ingolf Steffan-Dewenter ; Teja TscharntkeSource :
- Molecular Ecology [ 0962-1083 ] ; 2004-02.
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Abstract
Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly Polyommatus coridon, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant Hippocrepis comosa reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (FST = 0.013). No isolation‐by‐distance was found. Hierarchical F‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest P. coridon population. The population size of P. coridon and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of P. coridon was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.
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DOI: 10.1046/j.1365-294X.2003.02072.x
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uniqKey="Seitz A" first="Alfred" last="Seitz">Alfred Seitz</name><affiliation><mods:affiliation>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</mods:affiliation></affiliation></author><author><name sortKey="Steffan Ewenter, Ingolf" sort="Steffan Ewenter, Ingolf" uniqKey="Steffan Ewenter I" first="Ingolf" last="Steffan-Dewenter">Ingolf Steffan-Dewenter</name><affiliation><mods:affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</mods:affiliation></affiliation></author><author><name sortKey="Tscharntke, Teja" sort="Tscharntke, Teja" uniqKey="Tscharntke T" first="Teja" last="Tscharntke">Teja Tscharntke</name><affiliation><mods:affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno 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jkrauss@uwinst.unizh.ch</mods:affiliation></affiliation></author><author><name sortKey="Schmitt, Thomas" sort="Schmitt, Thomas" uniqKey="Schmitt T" first="Thomas" last="Schmitt">Thomas Schmitt</name><affiliation><mods:affiliation>Department of Biogeography, Wissenschaftspark Trier‐Petrisberg, University of Trier, D‐54286 Trier, Germany,</mods:affiliation></affiliation></author><author><name sortKey="Seitz, Alfred" sort="Seitz, Alfred" uniqKey="Seitz A" first="Alfred" last="Seitz">Alfred Seitz</name><affiliation><mods:affiliation>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</mods:affiliation></affiliation></author><author><name sortKey="Steffan Ewenter, Ingolf" sort="Steffan Ewenter, Ingolf" uniqKey="Steffan Ewenter I" first="Ingolf" last="Steffan-Dewenter">Ingolf Steffan-Dewenter</name><affiliation><mods:affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</mods:affiliation></affiliation></author><author><name sortKey="Tscharntke, Teja" sort="Tscharntke, Teja" uniqKey="Tscharntke T" first="Teja" last="Tscharntke">Teja Tscharntke</name><affiliation><mods:affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Molecular Ecology</title><idno type="ISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2004-02">2004-02</date><biblScope unit="volume">13</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="311">311</biblScope><biblScope unit="page" to="320">320</biblScope></imprint><idno type="ISSN">0962-1083</idno></series><idno type="istex">9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD</idno><idno type="DOI">10.1046/j.1365-294X.2003.02072.x</idno><idno type="ArticleID">MEC2072</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0962-1083</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>allozymes</term><term>calcareous grasslands</term><term>genetic diversity</term><term>habitat area</term><term>isolation‐by‐distance</term><term>population size</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly Polyommatus coridon, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant Hippocrepis comosa reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (FST = 0.013). No isolation‐by‐distance was found. Hierarchical F‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest P. coridon population. The population size of P. coridon and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of P. coridon was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Jochen Krauss</name><affiliations><json:string>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</json:string><json:string>E-mail: jkrauss@uwinst.unizh.ch</json:string></affiliations></json:item><json:item><name>Thomas Schmitt</name><affiliations><json:string>Department of Biogeography, Wissenschaftspark Trier‐Petrisberg, University of Trier, D‐54286 Trier, Germany,</json:string></affiliations></json:item><json:item><name>Alfred Seitz</name><affiliations><json:string>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</json:string></affiliations></json:item><json:item><name>Ingolf Steffan‐Dewenter</name><affiliations><json:string>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</json:string></affiliations></json:item><json:item><name>Teja Tscharntke</name><affiliations><json:string>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>allozymes</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>calcareous grasslands</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>genetic diversity</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>habitat area</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>isolation‐by‐distance</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>population size</value></json:item></subject><articleId><json:string>MEC2072</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly Polyommatus coridon, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant Hippocrepis comosa reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (FST = 0.013). No isolation‐by‐distance was found. Hierarchical F‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest P. coridon population. The population size of P. coridon and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of P. coridon was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.</abstract><qualityIndicators><score>7.484</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595 x 782 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1470</abstractCharCount><pdfWordCount>6005</pdfWordCount><pdfCharCount>38591</pdfCharCount><pdfPageCount>10</pdfPageCount><abstractWordCount>207</abstractWordCount></qualityIndicators><title>Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin</title><refBibs><json:item><author><json:item><name>W Amos</name></json:item><json:item><name>J Harwood</name></json:item></author><host><volume>353</volume><pages><last>186</last><first>177</first></pages><author></author><title>Philosophical Transactions of the Royal Society of London Series B, Biological Sciences</title></host><title>Factors affecting levels of genetic diversity in natural populations</title></json:item><json:item><host><author></author><title>Asher J, Warren M, Fox R, Harding P, Jeffcoate G, Jeffcoate S (2001) The Millennium Atlas of Butterflies in Britain and Ireland. 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biology</json:string><json:string>ecology</json:string><json:string>biochemistry & molecular biology</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>biology</json:string><json:string>evolutionary biology</json:string></scienceMetrix></categories><publicationDate>2004</publicationDate><copyrightDate>2004</copyrightDate><doi><json:string>10.1046/j.1365-294X.2003.02072.x</json:string></doi><id>9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD</id><score>0.95514894</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><availability><p>WILEY</p></availability><date>2004</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin</title><author xml:id="author-1"><persName><forename type="first">Jochen</forename><surname>Krauss</surname></persName><email>jkrauss@uwinst.unizh.ch</email><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation></author><author xml:id="author-2"><persName><forename type="first">Thomas</forename><surname>Schmitt</surname></persName><affiliation>Department of Biogeography, Wissenschaftspark Trier‐Petrisberg, University of Trier, D‐54286 Trier, Germany,</affiliation></author><author xml:id="author-3"><persName><forename type="first">Alfred</forename><surname>Seitz</surname></persName><affiliation>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</affiliation></author><author xml:id="author-4"><persName><forename type="first">Ingolf</forename><surname>Steffan‐Dewenter</surname></persName><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation></author><author xml:id="author-5"><persName><forename type="first">Teja</forename><surname>Tscharntke</surname></persName><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation></author></analytic><monogr><title level="j">Molecular Ecology</title><idno type="pISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><idno type="DOI">10.1111/(ISSN)1365-294X</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2004-02"></date><biblScope unit="volume">13</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="311">311</biblScope><biblScope unit="page" to="320">320</biblScope></imprint></monogr><idno type="istex">9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD</idno><idno type="DOI">10.1046/j.1365-294X.2003.02072.x</idno><idno type="ArticleID">MEC2072</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2004</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly Polyommatus coridon, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant Hippocrepis comosa reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (FST = 0.013). No isolation‐by‐distance was found. Hierarchical F‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest P. coridon population. The population size of P. coridon and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of P. coridon was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>allozymes</term></item><item><term>calcareous grasslands</term></item><item><term>genetic diversity</term></item><item><term>habitat area</term></item><item><term>isolation‐by‐distance</term></item><item><term>population size</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2004-02">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD/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 version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Science Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-294X</doi><issn type="print">0962-1083</issn><issn type="electronic">1365-294X</issn><idGroup><id type="product" value="MEC"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="MOLECULAR ECOLOGY">Molecular Ecology</title></titleGroup></publicationMeta><publicationMeta level="part" position="02002"><doi origin="wiley">10.1111/mec.2004.13.issue-2</doi><numberingGroup><numbering type="journalVolume" number="13">13</numbering><numbering type="journalIssue" number="2">2</numbering></numberingGroup><coverDate startDate="2004-02">February 2004</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="6" status="forIssue"><doi origin="wiley">10.1046/j.1365-294X.2003.02072.x</doi><idGroup><id type="unit" value="MEC2072"></id></idGroup><countGroup><count type="pageTotal" number="10"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><eventGroup><event type="firstOnline" date="2004-01-28"></event><event type="publishedOnlineFinalForm" date="2004-01-28"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.11 mode:FullText" date="2010-07-07"></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="2014-10-31"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="311">311</numbering><numbering type="pageLast" number="320">320</numbering></numberingGroup><correspondenceTo> Jochen Krauss. Fax: +49 551398806; E‐mail: <email>jkrauss@uwinst.unizh.ch</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:MEC.MEC2072.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received 25 September 2003; revision received 22 October 2003; accepted 22 October 2003</unparsedEditorialHistory><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="3"></count><count type="formulaTotal" number="0"></count><count type="referenceTotal" number="66"></count><count type="wordTotal" number="6658"></count></countGroup><titleGroup><title type="main">Effects of habitat fragmentation on the genetic structure of the monophagous butterfly <i>Polyommatus coridon</i> along its northern range margin</title><title type="shortAuthors">J. KRAUSS <i>ET AL.</i></title><title type="short">GENETIC STRUCTURE OF A MONOPHAGOUS BUTTERFLY</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1" corresponding="yes"><personName><givenNames>Jochen</givenNames><familyName>Krauss</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>Thomas</givenNames><familyName>Schmitt</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a3"><personName><givenNames>Alfred</givenNames><familyName>Seitz</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a1"><personName><givenNames>Ingolf</givenNames><familyName>Steffan‐Dewenter</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a1"><personName><givenNames>Teja</givenNames><familyName>Tscharntke</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="DE"><unparsedAffiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="DE"><unparsedAffiliation>Department of Biogeography, Wissenschaftspark Trier‐Petrisberg, University of Trier, D‐54286 Trier, Germany,</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="DE"><unparsedAffiliation>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">allozymes</keyword><keyword xml:id="k2">calcareous grasslands</keyword><keyword xml:id="k3">genetic diversity</keyword><keyword xml:id="k4">habitat area</keyword><keyword xml:id="k5">isolation‐by‐distance</keyword><keyword xml:id="k6">population size </keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly <i>Polyommatus coridon</i>, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant <i>Hippocrepis comosa</i> reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (<i>F</i><sub>ST</sub> = 0.013). No isolation‐by‐distance was found. Hierarchical <i>F</i>‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest <i>P. coridon</i> population. The population size of <i>P. coridon</i> and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of <i>P. coridon</i> was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>GENETIC STRUCTURE OF A MONOPHAGOUS BUTTERFLY</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Effects of habitat fragmentation on the genetic structure of the monophagous butterfly Polyommatus coridon along its northern range margin</title></titleInfo><name type="personal"><namePart type="given">Jochen</namePart><namePart type="family">Krauss</namePart><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation><affiliation>E-mail: jkrauss@uwinst.unizh.ch</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Thomas</namePart><namePart type="family">Schmitt</namePart><affiliation>Department of Biogeography, Wissenschaftspark Trier‐Petrisberg, University of Trier, D‐54286 Trier, Germany,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Alfred</namePart><namePart type="family">Seitz</namePart><affiliation>Institute of Zoology, Department V, Ecology, University of Mainz, Saarstraße 21, D‐55099 Mainz, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ingolf</namePart><namePart type="family">Steffan‐Dewenter</namePart><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Teja</namePart><namePart type="family">Tscharntke</namePart><affiliation>Agroecology, University of Göttingen, Waldweg 26, D‐37073 Göttingen, Germany,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Science Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2004-02</dateIssued><edition>Received 25 September 2003; revision received 22 October 2003; accepted 22 October 2003</edition><copyrightDate encoding="w3cdtf">2004</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">3</extent><extent unit="references">66</extent><extent unit="words">6658</extent></physicalDescription><abstract lang="en">Population genetic patterns of species at their range margin have important implications for species conservation. We performed allozyme electrophoresis of 19 loci to investigate patterns of the genetic structure of 17 populations (538 individuals) of the butterfly Polyommatus coridon, a monophagous habitat specialist with a patchy distribution. The butterfly and its larval food plant Hippocrepis comosa reach their northern distribution margin in the study region (southern Lower Saxony, Germany). Butterfly population size increased with host plant population size. The genetic differentiation between populations was low but significant (FST = 0.013). No isolation‐by‐distance was found. Hierarchical F‐statistics revealed significant differentiation between a western and an eastern subregion, separated by a river valley. The combination of genetic and ecological data sets revealed that the expected heterozygosity (mean: 18.5%) decreased with increasing distance to the nearest P. coridon population. The population size of P. coridon and the size of larval food plant population had no effect on the genetic diversity. The genetic diversity of edge populations of P. coridon was reduced compared to populations from the centre of its distribution. This might be explained by (i) an increasing habitat fragmentation towards the edge of the distribution range and/or (ii) a general reduction of genetic variability towards the northern edge of its distribution.</abstract><subject lang="en"><genre>keywords</genre><topic>allozymes</topic><topic>calcareous grasslands</topic><topic>genetic diversity</topic><topic>habitat area</topic><topic>isolation‐by‐distance</topic><topic>population size</topic></subject><relatedItem type="host"><titleInfo><title>Molecular Ecology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0962-1083</identifier><identifier type="eISSN">1365-294X</identifier><identifier type="DOI">10.1111/(ISSN)1365-294X</identifier><identifier type="PublisherID">MEC</identifier><part><date>2004</date><detail type="volume"><caption>vol.</caption><number>13</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>311</start><end>320</end><total>10</total></extent></part></relatedItem><identifier type="istex">9E34CA9BC3A5DEF5545E97552FF4733F9E4244BD</identifier><identifier type="DOI">10.1046/j.1365-294X.2003.02072.x</identifier><identifier type="ArticleID">MEC2072</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Science Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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