Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream
Identifieur interne : 000632 ( Istex/Corpus ); précédent : 000631; suivant : 000633Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream
Auteurs : Ingo Ensminger ; Julia Foerster ; Christoph Hagen ; Wolfram BrauneSource :
- Journal of Experimental Botany [ 0022-0957 ] ; 2005-08.
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Abstract
The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, Cladophora glomerata (L.) Kütz. and Vaucheria sp., was linked to differences in their photosynthetic plasticity. Cladophora glomerata revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, Vaucheria sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (Fv/Fm) in C. glomerata and a concomitant reversible decrease of the light-adapted quantum yield \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document} In Vaucheria sp., Fv/Fm remained mostly unchanged over the day, whereas \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document} decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL C. glomerata showed increased chlorophyll a:chlorophyll b ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas Vaucheria sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for C. glomerata and Vaucheria sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.
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DOI: 10.1093/jxb/eri203
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title><author><name sortKey="Ensminger, Ingo" sort="Ensminger, Ingo" uniqKey="Ensminger I" first="Ingo" last="Ensminger">Ingo Ensminger</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: iensming@uwo.ca</mods:affiliation></affiliation></author><author><name sortKey="Foerster, Julia" sort="Foerster, Julia" uniqKey="Foerster J" first="Julia" last="Foerster">Julia Foerster</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author><author><name sortKey="Hagen, Christoph" sort="Hagen, Christoph" uniqKey="Hagen C" first="Christoph" last="Hagen">Christoph Hagen</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author><author><name sortKey="Braune, Wolfram" sort="Braune, Wolfram" uniqKey="Braune W" first="Wolfram" last="Braune">Wolfram Braune</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:A4FC872E7829AA60D39380AD48D76D6347D981FE</idno><date when="2005" year="2005">2005</date><idno type="doi">10.1093/jxb/eri203</idno><idno type="url">https://api.istex.fr/document/A4FC872E7829AA60D39380AD48D76D6347D981FE/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000632</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title><author><name sortKey="Ensminger, Ingo" sort="Ensminger, Ingo" uniqKey="Ensminger I" first="Ingo" last="Ensminger">Ingo Ensminger</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: iensming@uwo.ca</mods:affiliation></affiliation></author><author><name sortKey="Foerster, Julia" sort="Foerster, Julia" uniqKey="Foerster J" first="Julia" last="Foerster">Julia Foerster</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author><author><name sortKey="Hagen, Christoph" sort="Hagen, Christoph" uniqKey="Hagen C" first="Christoph" last="Hagen">Christoph Hagen</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author><author><name sortKey="Braune, Wolfram" sort="Braune, Wolfram" uniqKey="Braune W" first="Wolfram" last="Braune">Wolfram Braune</name><affiliation><mods:affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Experimental Botany</title><title level="j" type="abbrev">J. Exp. Bot.</title><idno type="ISSN">0022-0957</idno><idno type="eISSN">1460-2431</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2005-08">2005-08</date><biblScope unit="volume">56</biblScope><biblScope unit="issue">418</biblScope><biblScope unit="page" from="2047">2047</biblScope><biblScope unit="page" to="2058">2058</biblScope></imprint><idno type="ISSN">0022-0957</idno></series><idno type="istex">A4FC872E7829AA60D39380AD48D76D6347D981FE</idno><idno type="DOI">10.1093/jxb/eri203</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-0957</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Electron transport</term><term>environmental conditions</term><term>freshwater algae</term><term>photoinhibition</term><term>spatial distribution</term><term>xanthophyll cycle</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, Cladophora glomerata (L.) Kütz. and Vaucheria sp., was linked to differences in their photosynthetic plasticity. Cladophora glomerata revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, Vaucheria sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (Fv/Fm) in C. glomerata and a concomitant reversible decrease of the light-adapted quantum yield \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document} In Vaucheria sp., Fv/Fm remained mostly unchanged over the day, whereas \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document} decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL C. glomerata showed increased chlorophyll a:chlorophyll b ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas Vaucheria sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for C. glomerata and Vaucheria sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.</div></front></TEI><istex><corpusName>oup</corpusName><author><json:item><name>Ingo Ensminger</name><affiliations><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string><json:string>E-mail: iensming@uwo.ca</json:string></affiliations></json:item><json:item><name>Julia Foerster</name><affiliations><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string></affiliations></json:item><json:item><name>Christoph Hagen</name><affiliations><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string></affiliations></json:item><json:item><name>Wolfram Braune</name><affiliations><json:string>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Research Papers</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Electron transport</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>environmental conditions</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>freshwater algae</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>photoinhibition</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>spatial distribution</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>xanthophyll cycle</value></json:item></subject><language><json:string>eng</json:string></language><abstract>The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, Cladophora glomerata (L.) Kütz. and Vaucheria sp., was linked to differences in their photosynthetic plasticity. Cladophora glomerata revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, Vaucheria sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (Fv/Fm) in C. glomerata and a concomitant reversible decrease of the light-adapted quantum yield \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document} In Vaucheria sp., Fv/Fm remained mostly unchanged over the day, whereas \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document} decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL C. glomerata showed increased chlorophyll a:chlorophyll b ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas Vaucheria sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for C. glomerata and Vaucheria sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.</abstract><qualityIndicators><score>7.988</score><pdfVersion>1.3</pdfVersion><pdfPageSize>612 x 791 pts</pdfPageSize><refBibsNative>false</refBibsNative><keywordCount>7</keywordCount><abstractCharCount>2097</abstractCharCount><pdfWordCount>7798</pdfWordCount><pdfCharCount>49928</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>249</abstractWordCount></qualityIndicators><title>Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title><genre><json:string>research-article</json:string></genre><host><volume>56</volume><pages><last>2058</last><first>2047</first></pages><issn><json:string>0022-0957</json:string></issn><issue>418</issue><genre></genre><language><json:string>unknown</json:string></language><eissn><json:string>1460-2431</json:string></eissn><title>Journal of Experimental Botany</title></host><categories><wos><json:string>PLANT SCIENCES</json:string></wos></categories><publicationDate>2005</publicationDate><copyrightDate>2005</copyrightDate><doi><json:string>10.1093/jxb/eri203</json:string></doi><id>A4FC872E7829AA60D39380AD48D76D6347D981FE</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/A4FC872E7829AA60D39380AD48D76D6347D981FE/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/A4FC872E7829AA60D39380AD48D76D6347D981FE/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/A4FC872E7829AA60D39380AD48D76D6347D981FE/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title><respStmt xml:id="ISTEX-API" resp="Références bibliographiques récupérées via GROBID" name="ISTEX-API (INIST-CNRS)"></respStmt></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Oxford University Press</publisher><availability><p>OUP</p></availability><date>2005-07-04</date></publicationStmt><notesStmt><note>*Present address and to whom correspondence should be sent: Environmental Stress Biology Group, University of Western Ontario, London, Ontario Canada N6A 5B7. 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Exp. Bot.</title><idno type="JournalID">exbotj</idno><idno type="pISSN">0022-0957</idno><idno type="eISSN">1460-2431</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2005-08"></date><biblScope unit="volume">56</biblScope><biblScope unit="issue">418</biblScope><biblScope unit="page" from="2047">2047</biblScope><biblScope unit="page" to="2058">2058</biblScope></imprint></monogr><idno type="istex">A4FC872E7829AA60D39380AD48D76D6347D981FE</idno><idno type="DOI">10.1093/jxb/eri203</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2005-07-04</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, Cladophora glomerata (L.) Kütz. and Vaucheria sp., was linked to differences in their photosynthetic plasticity. Cladophora glomerata revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, Vaucheria sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (Fv/Fm) in C. glomerata and a concomitant reversible decrease of the light-adapted quantum yield \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document} In Vaucheria sp., Fv/Fm remained mostly unchanged over the day, whereas \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document} decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL C. glomerata showed increased chlorophyll a:chlorophyll b ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas Vaucheria sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for C. glomerata and Vaucheria sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.</p></abstract><textClass><keywords scheme="keyword"><list><head>heading</head><item><term>Research Papers</term></item></list></keywords></textClass><textClass xml:lang="en"><keywords scheme="keyword"><list><head>KWD</head><item><term>Electron transport</term></item><item><term>environmental conditions</term></item><item><term>freshwater algae</term></item><item><term>photoinhibition</term></item><item><term>spatial distribution</term></item><item><term>xanthophyll cycle</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2005-07-04">Created</change><change when="2005-08">Published</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2016-1-2">References added</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/A4FC872E7829AA60D39380AD48D76D6347D981FE/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="corpus oup" wicri:toSee="no header"><istex:xmlDeclaration>version="1.0" encoding="US-ASCII"</istex:xmlDeclaration><istex:docType PUBLIC="-//NLM//DTD Journal Publishing DTD v2.3 20070202//EN" URI="journalpublishing.dtd" name="istex:docType"></istex:docType><istex:document><article xml:lang="en" article-type="research-article"><front><journal-meta><journal-id journal-id-type="hwp">jexbot</journal-id><journal-id journal-id-type="nlm-ta">J Exp Bot</journal-id><journal-id journal-id-type="publisher-id">exbotj</journal-id><journal-title>Journal of Experimental Botany</journal-title><abbrev-journal-title abbrev-type="publisher">J. Exp. Bot.</abbrev-journal-title><issn pub-type="ppub">0022-0957</issn><issn pub-type="epub">1460-2431</issn><publisher><publisher-name>Oxford University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="other">eri203</article-id><article-id pub-id-type="doi">10.1093/jxb/eri203</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Papers</subject></subj-group></article-categories><title-group><article-title>Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Ensminger</surname><given-names>Ingo</given-names></name><xref rid="COR1"><sup>*</sup></xref></contrib><contrib contrib-type="author"><name><surname>Foerster</surname><given-names>Julia</given-names></name><xref rid="FN1"><sup>†</sup></xref></contrib><contrib contrib-type="author"><name><surname>Hagen</surname><given-names>Christoph</given-names></name><xref rid="FN2"><sup>‡</sup></xref></contrib><contrib contrib-type="author"><name><surname>Braune</surname><given-names>Wolfram</given-names></name></contrib><aff>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</aff></contrib-group><author-notes><corresp id="COR1"><label>*</label>Present address and to whom correspondence should be sent: Environmental Stress Biology Group, University of Western Ontario, London, Ontario Canada N6A 5B7. Fax: +1 519 661 3935. E-mail: <ext-link xlink:href="iensming@uwo.ca" ext-link-type="email">iensming@uwo.ca</ext-link></corresp></author-notes><pub-date pub-type="epub"><day>4</day><month>7</month><year>2005</year></pub-date><pub-date pub-type="ppub"><month>August</month><year>2005</year></pub-date><volume>56</volume><issue>418</issue><fpage>2047</fpage><lpage>2058</lpage><history><date date-type="accepted"><day>19</day><month>4</month><year>2005</year></date><date date-type="received"><day>28</day><month>1</month><year>2005</year></date></history><permissions><copyright-statement>© The Author [2005]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oupjournals.org</copyright-statement><copyright-year>2005</copyright-year></permissions><abstract xml:lang="en"><p>The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, <italic>Cladophora glomerata</italic> (L.) Kütz. and <italic>Vaucheria</italic> sp., was linked to differences in their photosynthetic plasticity. <italic>Cladophora glomerata</italic> revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, <italic>Vaucheria</italic> sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (<italic>F</italic><sub>v</sub>/<italic>F</italic><sub>m</sub>) in <italic>C. glomerata</italic> and a concomitant reversible decrease of the light-adapted quantum yield <inline-formula><tex-math>\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document}</tex-math></inline-formula> In <italic>Vaucheria</italic> sp., <italic>F</italic><sub>v</sub>/<italic>F</italic><sub>m</sub> remained mostly unchanged over the day, whereas <inline-formula><tex-math>\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document}</tex-math></inline-formula> decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL <italic>C. glomerata</italic> showed increased chlorophyll <italic>a</italic>:chlorophyll <italic>b</italic> ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas <italic>Vaucheria</italic> sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for <italic>C. glomerata</italic> and <italic>Vaucheria</italic> sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.</p></abstract><kwd-group kwd-group-type="KWD" xml:lang="en"><kwd>Electron transport</kwd><kwd>environmental conditions</kwd><kwd>freshwater algae</kwd><kwd>photoinhibition</kwd><kwd>spatial distribution</kwd><kwd>xanthophyll cycle</kwd></kwd-group><custom-meta-wrap><custom-meta><meta-name>hwp-legacy-fpage</meta-name><meta-value>2047</meta-value></custom-meta><custom-meta><meta-name>cover-date</meta-name><meta-value>August 2005</meta-value></custom-meta><custom-meta><meta-name>hwp-legacy-dochead</meta-name><meta-value>Research Paper</meta-value></custom-meta></custom-meta-wrap></article-meta></front></article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Plasticity and acclimation to light reflected in temporal and spatial changes of small-scale macroalgal distribution in a stream</title></titleInfo><name type="personal"><namePart type="given">Ingo</namePart><namePart type="family">Ensminger</namePart><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><affiliation>E-mail: iensming@uwo.ca</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Julia</namePart><namePart type="family">Foerster</namePart><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Christoph</namePart><namePart type="family">Hagen</namePart><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Wolfram</namePart><namePart type="family">Braune</namePart><affiliation>Institut für Allgemeine Botanik, Universität Jena, Am Planetarium 1, D-07743 Jena, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article">research-article</genre><subject><genre>heading</genre><topic>Research Papers</topic></subject><originInfo><publisher>Oxford University Press</publisher><dateIssued encoding="w3cdtf">2005-08</dateIssued><dateCreated encoding="w3cdtf">2005-07-04</dateCreated><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The small-scale distribution pattern of macroalgae in the river Ilm, in Germany was monitored. These patterns were then related to abiotic factors and tested to discover whether the distribution of the common macroalgae, Cladophora glomerata (L.) Kütz. and Vaucheria sp., was linked to differences in their photosynthetic plasticity. Cladophora glomerata revealed higher maximum photosynthetic electron transport rates after acclimation to high light (HL) compared with low light (LL) acclimated samples. By contrast, Vaucheria sp. did not acclimate to different growth light conditions. The photosynthetic performance of both algae also varied according to diurnal conditions. High light caused a reversible decrease of the dark-adapted quantum yield (Fv/Fm) in C. glomerata and a concomitant reversible decrease of the light-adapted quantum yield \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(({\Delta}F/F{^\prime}_{\mathrm{m}}).\) \end{document} In Vaucheria sp., Fv/Fm remained mostly unchanged over the day, whereas \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\Delta}F/F{^\prime}_{\mathrm{m}}\) \end{document} decreased during the morning at low light. Photosynthetic pigments confirmed acclimational differences between the species. HL C. glomerata showed increased chlorophyll a:chlorophyll b ratios, and higher amounts of xanthophyll-cycle pigments compared with LL samples, whereas Vaucheria sp. did not reveal differences between the light treatments. While preferences for substrate size, water velocity, and depth are similar for C. glomerata and Vaucheria sp., the physiological responses to light conditions are different. It is concluded that light conditions significantly affect the small-scale spatial distribution of macroalgae and that fitness is enhanced in species with a higher plasticity in photosynthetic acclimation in unstable environments.</abstract><note type="author-notes">*Present address and to whom correspondence should be sent: Environmental Stress Biology Group, University of Western Ontario, London, Ontario Canada N6A 5B7. Fax: +1 519 661 3935. E-mail: iensming@uwo.ca</note><subject lang="en"><genre>KWD</genre><topic>Electron transport</topic><topic>environmental conditions</topic><topic>freshwater algae</topic><topic>photoinhibition</topic><topic>spatial distribution</topic><topic>xanthophyll cycle</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Experimental Botany</title></titleInfo><titleInfo type="abbreviated"><title>J. Exp. Bot.</title></titleInfo><identifier type="ISSN">0022-0957</identifier><identifier type="eISSN">1460-2431</identifier><identifier type="JournalID">exbotj</identifier><identifier type="JournalID-hwp">jexbot</identifier><identifier type="JournalID-nlm-ta">J Exp Bot</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>56</number></detail><detail type="issue"><caption>no.</caption><number>418</number></detail><extent unit="pages"><start>2047</start><end>2058</end></extent></part></relatedItem><identifier type="istex">A4FC872E7829AA60D39380AD48D76D6347D981FE</identifier><identifier type="DOI">10.1093/jxb/eri203</identifier><accessCondition type="use and reproduction" contentType="Copyright">© The Author [2005]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. 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