Topographic thresholds for plant colonization on semi‐arid eroded slopes
Identifieur interne : 001118 ( Istex/Corpus ); précédent : 001117; suivant : 001119Topographic thresholds for plant colonization on semi‐arid eroded slopes
Auteurs : E. Bochet ; P. García-Fayos ; J. PoesenSource :
- Earth Surface Processes and Landforms [ 0197-9337 ] ; 2009-10.
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Abstract
Soil erosion plays an important role in plant colonization of semi‐arid degraded areas. In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO3), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold. Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species. These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.
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DOI: 10.1002/esp.1860
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Bochet</name><affiliation><mods:affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</mods:affiliation></affiliation><affiliation><mods:affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Camí de la Marjal s/n, Apdo Oficial, 46470 Albal, Valencia, Spain</mods:affiliation></affiliation></author><author><name sortKey="Garcia Ayos, P" sort="Garcia Ayos, P" uniqKey="Garcia Ayos P" first="P." last="García-Fayos">P. García-Fayos</name><affiliation><mods:affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</mods:affiliation></affiliation></author><author><name sortKey="Poesen, J" sort="Poesen, J" uniqKey="Poesen J" first="J." last="Poesen">J. 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Landforms</title><idno type="ISSN">0197-9337</idno><idno type="eISSN">1096-9837</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2009-10">2009-10</date><biblScope unit="volume">34</biblScope><biblScope unit="issue">13</biblScope><biblScope unit="page" from="1758">1758</biblScope><biblScope unit="page" to="1771">1771</biblScope></imprint><idno type="ISSN">0197-9337</idno></series><idno type="istex">F731168057542F814A4F336BB0F981EDB5E4E3A7</idno><idno type="DOI">10.1002/esp.1860</idno><idno type="ArticleID">ESP1860</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0197-9337</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>dispersal</term><term>eco‐geomorphology</term><term>erosion</term><term>plant traits</term><term>restoration ecology</term><term>roots</term><term>slope angle</term><term>slope aspect</term><term>soil properties</term><term>vegetation</term><term>water availability</term><term>water stress</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Soil erosion plays an important role in plant colonization of semi‐arid degraded areas. In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO3), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold. Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species. These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>E. Bochet</name><affiliations><json:string>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</json:string><json:string>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Camí de la Marjal s/n, Apdo Oficial, 46470 Albal, Valencia, Spain</json:string></affiliations></json:item><json:item><name>P. García‐Fayos</name><affiliations><json:string>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</json:string></affiliations></json:item><json:item><name>J. Poesen</name><affiliations><json:string>Physical and Regional Geography Research Group, K.U.Leuven, Geo‐Institute, Heverlee, Belgium</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>vegetation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>erosion</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>eco‐geomorphology</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>water availability</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>plant traits</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>soil properties</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>slope aspect</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>slope angle</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>restoration ecology</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>roots</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>dispersal</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>water stress</value></json:item></subject><articleId><json:string>ESP1860</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Soil erosion plays an important role in plant colonization of semi‐arid degraded areas. In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO3), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold. Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species. These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.</abstract><qualityIndicators><score>8</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595 x 842 pts (A4)</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>2323</abstractCharCount><pdfWordCount>8656</pdfWordCount><pdfCharCount>58232</pdfCharCount><pdfPageCount>14</pdfPageCount><abstractWordCount>345</abstractWordCount></qualityIndicators><title>Topographic thresholds for plant colonization on semi‐arid eroded slopes</title><refBibs><json:item><author><json:item><name>R Aerts</name></json:item><json:item><name>W Maes</name></json:item><json:item><name>E November</name></json:item><json:item><name>M Behailu</name></json:item><json:item><name>J Poesen</name></json:item><json:item><name>J Deckers</name></json:item><json:item><name>M Hermy</name></json:item><json:item><name>B Muys</name></json:item></author><host><volume>65</volume><pages><last>70</last><first>61</first></pages><author></author><title>Catena</title></host><title>Surface runoff and seed trapping efficiency of shrubs in a regenerating semiarid woodland in northern Ethiopia</title></json:item><json:item><author><json:item><name>RW Alexander</name></json:item><json:item><name>AM Harvey</name></json:item><json:item><name>A Calvo</name></json:item><json:item><name>PA James</name></json:item><json:item><name>A Cerdà</name></json:item></author><host><pages><last>111</last><first>85</first></pages><author></author><title>Environmental Change in Drylands</title></host><title>Natural stabilisation mechanisms on badland slopes: Tabernas, Almeria, Spain</title></json:item><json:item><host><author></author><title>Boardman J, Poesen J. 2006. 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Process. Landforms</title><idno type="pISSN">0197-9337</idno><idno type="eISSN">1096-9837</idno><idno type="DOI">10.1002/(ISSN)1096-9837</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2009-10"></date><biblScope unit="volume">34</biblScope><biblScope unit="issue">13</biblScope><biblScope unit="page" from="1758">1758</biblScope><biblScope unit="page" to="1771">1771</biblScope></imprint></monogr><idno type="istex">F731168057542F814A4F336BB0F981EDB5E4E3A7</idno><idno type="DOI">10.1002/esp.1860</idno><idno type="ArticleID">ESP1860</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2009</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Soil erosion plays an important role in plant colonization of semi‐arid degraded areas. In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO3), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold. Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species. These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>vegetation</term></item><item><term>erosion</term></item><item><term>eco‐geomorphology</term></item><item><term>water availability</term></item><item><term>plant traits</term></item><item><term>soil properties</term></item><item><term>slope aspect</term></item><item><term>slope angle</term></item><item><term>restoration ecology</term></item><item><term>roots</term></item><item><term>dispersal</term></item><item><term>water stress</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Research Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2009-01-15">Received</change><change when="2009-06-08">Registration</change><change when="2009-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/F731168057542F814A4F336BB0F981EDB5E4E3A7/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>John Wiley & Sons, Ltd.</publisherName><publisherLoc>Chichester, UK</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1096-9837</doi><issn type="print">0197-9337</issn><issn type="electronic">1096-9837</issn><idGroup><id type="product" value="ESP"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="EARTH SURFACE PROCESSES AND LANDFORMS">Earth Surface Processes and Landforms</title><title type="subtitle">The Journal of the British Geomorphological Research Group</title><title type="short">Earth Surf. Process. 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In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations.</p><p>Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO<sub>3</sub>), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold.</p><p>Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species.</p><p>These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Topographic thresholds for plant colonization on semi‐arid eroded slopes</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>TOPOGRAPHIC THRESHOLDS FOR PLANT COLONIZATION ON SEMI‐ARID ERODED SLOPES</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Topographic thresholds for plant colonization on semi‐arid eroded slopes</title></titleInfo><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Bochet</namePart><affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</affiliation><affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Camí de la Marjal s/n, Apdo Oficial, 46470 Albal, Valencia, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">García‐Fayos</namePart><affiliation>Centro de Investigaciones sobre Desertificación (CSIC, Universidad de Valencia, Generalitat Valenciana), Valencia, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Poesen</namePart><affiliation>Physical and Regional Geography Research Group, K.U.Leuven, Geo‐Institute, Heverlee, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Ltd.</publisher><place><placeTerm type="text">Chichester, UK</placeTerm></place><dateIssued encoding="w3cdtf">2009-10</dateIssued><dateCaptured encoding="w3cdtf">2009-01-15</dateCaptured><dateValid encoding="w3cdtf">2009-06-08</dateValid><copyrightDate encoding="w3cdtf">2009</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">6</extent><extent unit="tables">5</extent><extent unit="references">57</extent></physicalDescription><abstract lang="en">Soil erosion plays an important role in plant colonization of semi‐arid degraded areas. In this study, we aimed at deepening our knowledge of the mechanisms that control plant colonization on semi‐arid eroded slopes in east Spain by (i) determining topographic thresholds for plant colonization, (ii) identifying the soil properties limiting plant establishment and (iii) assessing whether colonizing species have specific plant traits to cope with these limitations. Slope angle and aspect were surrogates of erosion rate and water availability, respectively. Since soil erosion and water availability can limit plant establishment and both can interact in the landscape, we analysed variations in colonization success (vegetation cover and species number) with slope angle on 156 slopes, as a function of slope aspect. After determining slope angle thresholds for plant colonization, soil was sampled near the threshold values for soil analysis [nitrogen, phosphorous, calcium carbonate (CaCO3), water holding capacity]. Plant traits expressing the plant colonizing capacity were analysed both in the pool of species colonizing the steep slopes just below the threshold and in the pool of species inhabiting gentler slopes and absent from the slopes just below the threshold. Results show that the slope angle threshold for plant colonization decreased from north to south. For the vegetation cover, threshold values were 63°, 50°, 46°, 41° for the north, east, west and south slope aspect classes, respectively, and 65°, 53°, 49° and 45° for the species richness and the same aspect classes. No differences existed in soil properties at slope angle threshold values among slope aspects and between slope positions (just below and above the threshold) within slope aspect classes. This suggests that variations between slope aspect classes in the slope angle threshold result from differences in the colonizing capacity of plants which is controlled by water availability. Long‐distance dispersal and mucilage production were preferably associated with the pool of colonizing species. These results are discussed in the perspective of a more efficient ecological restoration of degraded semi‐arid ecosystems where soil erosion acts as an ecological filter for plant establishment. Copyright © 2009 John Wiley & Sons, Ltd.</abstract><subject lang="en"><genre>keywords</genre><topic>vegetation</topic><topic>erosion</topic><topic>eco‐geomorphology</topic><topic>water availability</topic><topic>plant traits</topic><topic>soil properties</topic><topic>slope aspect</topic><topic>slope angle</topic><topic>restoration ecology</topic><topic>roots</topic><topic>dispersal</topic><topic>water stress</topic></subject><relatedItem type="host"><titleInfo><title>Earth Surface Processes and Landforms</title><subTitle>The Journal of the British Geomorphological Research Group</subTitle></titleInfo><titleInfo type="abbreviated"><title>Earth Surf. Process. Landforms</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Research Article</topic></subject><identifier type="ISSN">0197-9337</identifier><identifier type="eISSN">1096-9837</identifier><identifier type="DOI">10.1002/(ISSN)1096-9837</identifier><identifier type="PublisherID">ESP</identifier><part><date>2009</date><detail type="volume"><caption>vol.</caption><number>34</number></detail><detail type="issue"><caption>no.</caption><number>13</number></detail><extent unit="pages"><start>1758</start><end>1771</end><total>14</total></extent></part></relatedItem><identifier type="istex">F731168057542F814A4F336BB0F981EDB5E4E3A7</identifier><identifier type="DOI">10.1002/esp.1860</identifier><identifier type="ArticleID">ESP1860</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2009 John Wiley & Sons, Ltd.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Ltd.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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