Variation in below-ground carbon fluxes along a Populus hybridization gradient.
Identifieur interne : 003A70 ( Main/Corpus ); précédent : 003A69; suivant : 003A71Variation in below-ground carbon fluxes along a Populus hybridization gradient.
Auteurs : Dylan G. Fischer ; Stephen C. Hart ; Carri J. Leroy ; Thomas G. WhithamSource :
- The New phytologist [ 0028-646X ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon Dioxide.
- genetics : Populus.
- metabolism : Plant Roots, Populus.
- Genetic Variation, Hybridization, Genetic, Models, Biological, Regression Analysis, Soil, Temperature.
Abstract
Here, soil CO(2) efflux, minirhizotron fine root production (FRP), and estimated total below-ground carbon allocation (TBCA) were examined along an elevation and hybridization gradient between two cottonwood species. FRP was 72% greater under high-elevation Populus angustifolia, but soil CO(2) efflux and TBCA were 62% and 94% greater, respectively, under low-elevation stands dominated by Populus fremontii, with a hybrid stand showing intermediate values. Differences between the responses of FRP, soil CO(2) efflux and TBCA may potentially be explained in terms of genetic controls; while plant species and hybridization explained variance in carbon flux, we found only weak correlations of FRP and TBCA with soil moisture, and no correlations with soil temperature or nitrogen availability. Soil CO(2) efflux and TBCA were uncorrelated with FRP, suggesting that, although below-ground carbon fluxes may change along environmental and genetic gradients, major components of below-ground carbon flux may be decoupled.
DOI: 10.1111/j.1469-8137.2007.02167.x
PubMed: 17888120
Links to Exploration step
pubmed:17888120Le document en format XML
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<author><name sortKey="Fischer, Dylan G" sort="Fischer, Dylan G" uniqKey="Fischer D" first="Dylan G" last="Fischer">Dylan G. Fischer</name>
<affiliation><nlm:affiliation>Environmental Studies, Evergreen State College, Olympia, WA 98505, USA. fischerd@evergreen.edu</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Hart, Stephen C" sort="Hart, Stephen C" uniqKey="Hart S" first="Stephen C" last="Hart">Stephen C. Hart</name>
</author>
<author><name sortKey="Leroy, Carri J" sort="Leroy, Carri J" uniqKey="Leroy C" first="Carri J" last="Leroy">Carri J. Leroy</name>
</author>
<author><name sortKey="Whitham, Thomas G" sort="Whitham, Thomas G" uniqKey="Whitham T" first="Thomas G" last="Whitham">Thomas G. Whitham</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Variation in below-ground carbon fluxes along a Populus hybridization gradient.</title>
<author><name sortKey="Fischer, Dylan G" sort="Fischer, Dylan G" uniqKey="Fischer D" first="Dylan G" last="Fischer">Dylan G. Fischer</name>
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<author><name sortKey="Hart, Stephen C" sort="Hart, Stephen C" uniqKey="Hart S" first="Stephen C" last="Hart">Stephen C. Hart</name>
</author>
<author><name sortKey="Leroy, Carri J" sort="Leroy, Carri J" uniqKey="Leroy C" first="Carri J" last="Leroy">Carri J. Leroy</name>
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<author><name sortKey="Whitham, Thomas G" sort="Whitham, Thomas G" uniqKey="Whitham T" first="Thomas G" last="Whitham">Thomas G. Whitham</name>
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<series><title level="j">The New phytologist</title>
<idno type="ISSN">0028-646X</idno>
<imprint><date when="2007" type="published">2007</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon Dioxide (metabolism)</term>
<term>Genetic Variation (MeSH)</term>
<term>Hybridization, Genetic (MeSH)</term>
<term>Models, Biological (MeSH)</term>
<term>Plant Roots (metabolism)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
<term>Regression Analysis (MeSH)</term>
<term>Soil (MeSH)</term>
<term>Temperature (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon Dioxide</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term>
<term>Populus</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Genetic Variation</term>
<term>Hybridization, Genetic</term>
<term>Models, Biological</term>
<term>Regression Analysis</term>
<term>Soil</term>
<term>Temperature</term>
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<front><div type="abstract" xml:lang="en">Here, soil CO(2) efflux, minirhizotron fine root production (FRP), and estimated total below-ground carbon allocation (TBCA) were examined along an elevation and hybridization gradient between two cottonwood species. FRP was 72% greater under high-elevation Populus angustifolia, but soil CO(2) efflux and TBCA were 62% and 94% greater, respectively, under low-elevation stands dominated by Populus fremontii, with a hybrid stand showing intermediate values. Differences between the responses of FRP, soil CO(2) efflux and TBCA may potentially be explained in terms of genetic controls; while plant species and hybridization explained variance in carbon flux, we found only weak correlations of FRP and TBCA with soil moisture, and no correlations with soil temperature or nitrogen availability. Soil CO(2) efflux and TBCA were uncorrelated with FRP, suggesting that, although below-ground carbon fluxes may change along environmental and genetic gradients, major components of below-ground carbon flux may be decoupled.</div>
</front>
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<DateRevised><Year>2020</Year>
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<JournalIssue CitedMedium="Print"><Volume>176</Volume>
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<Title>The New phytologist</Title>
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<ArticleTitle>Variation in below-ground carbon fluxes along a Populus hybridization gradient.</ArticleTitle>
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<Abstract><AbstractText>Here, soil CO(2) efflux, minirhizotron fine root production (FRP), and estimated total below-ground carbon allocation (TBCA) were examined along an elevation and hybridization gradient between two cottonwood species. FRP was 72% greater under high-elevation Populus angustifolia, but soil CO(2) efflux and TBCA were 62% and 94% greater, respectively, under low-elevation stands dominated by Populus fremontii, with a hybrid stand showing intermediate values. Differences between the responses of FRP, soil CO(2) efflux and TBCA may potentially be explained in terms of genetic controls; while plant species and hybridization explained variance in carbon flux, we found only weak correlations of FRP and TBCA with soil moisture, and no correlations with soil temperature or nitrogen availability. Soil CO(2) efflux and TBCA were uncorrelated with FRP, suggesting that, although below-ground carbon fluxes may change along environmental and genetic gradients, major components of below-ground carbon flux may be decoupled.</AbstractText>
</Abstract>
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<ForeName>Dylan G</ForeName>
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<Author ValidYN="Y"><LastName>LeRoy</LastName>
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<Author ValidYN="Y"><LastName>Whitham</LastName>
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<MeshHeading><DescriptorName UI="D014644" MajorTopicYN="N">Genetic Variation</DescriptorName>
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<MeshHeading><DescriptorName UI="D006824" MajorTopicYN="Y">Hybridization, Genetic</DescriptorName>
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<MeshHeading><DescriptorName UI="D008954" MajorTopicYN="N">Models, Biological</DescriptorName>
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<MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName>
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</MeshHeading>
<MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName>
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<MeshHeading><DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName>
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