Leaf water (18) O and (2) H enrichment along vertical canopy profiles in a broadleaved and a conifer forest tree.
Identifieur interne : 000028 ( PubMed/Corpus ); précédent : 000027; suivant : 000029Leaf water (18) O and (2) H enrichment along vertical canopy profiles in a broadleaved and a conifer forest tree.
Auteurs : Rebekka Bögelein ; Frank M. Thomas ; Ansgar KahmenSource :
- Plant, cell & environment [ 1365-3040 ] ; 2017.
Abstract
Distinguishing meteorological and plant mediated drivers of leaf water isotopic enrichment is prerequisite for ecological interpretations of stable hydrogen and oxygen isotopes in plant tissue. We measured input and leaf water δ(2) H and δ(18) O as well as micrometeorological and leaf morpho-physiological variables along a vertical gradient in a mature angiosperm (European beech) and gymnosperm (Douglas fir) tree. We used these variables and different enrichment models to quantify the influence of Péclet and non-steady state effects and of the biophysical drivers on leaf water enrichment. The two-pools model accurately described the diurnal variation of leaf water enrichment. The estimated unenriched water fraction was linked to leaf dry matter content across the canopy heights. Non-steady state effects and reduced stomatal conductance caused a higher enrichment of Douglas fir compared to beech leaf water. A dynamic effect analyses revealed that the light-induced vertical gradients of stomatal conductance and leaf temperature outbalanced each other in their effects on evaporative enrichment. We conclude that neither vertical canopy gradients nor the Péclet effect are important for estimates and interpretation of isotopic leaf water enrichment in hypostomatous trees. Contrarily, species-specific non-steady state effects and leaf temperatures as well as the water vapour isotope composition need careful consideration.
DOI: 10.1111/pce.12895
PubMed: 28042668
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Thomas</name><affiliation><nlm:affiliation>Faculty of Regional and Environmental Sciences - Geobotany, University of Trier, 54296, Trier, Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Kahmen, Ansgar" sort="Kahmen, Ansgar" uniqKey="Kahmen A" first="Ansgar" last="Kahmen">Ansgar Kahmen</name><affiliation><nlm:affiliation>Department of Environmental Sciences - Botany, University of Basel, 4056, Basel, Switzerland.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2017">2017</date><idno type="RBID">pubmed:28042668</idno><idno type="pmid">28042668</idno><idno type="doi">10.1111/pce.12895</idno><idno type="wicri:Area/PubMed/Corpus">000028</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000028</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Leaf water (18) O and (2) H enrichment along vertical canopy profiles in a broadleaved and a conifer forest tree.</title><author><name sortKey="Bogelein, Rebekka" sort="Bogelein, Rebekka" uniqKey="Bogelein R" first="Rebekka" last="Bögelein">Rebekka Bögelein</name><affiliation><nlm:affiliation>Faculty of Regional and Environmental Sciences - Geobotany, University of Trier, 54296, Trier, Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Thomas, Frank M" sort="Thomas, Frank M" uniqKey="Thomas F" first="Frank M" last="Thomas">Frank M. Thomas</name><affiliation><nlm:affiliation>Faculty of Regional and Environmental Sciences - Geobotany, University of Trier, 54296, Trier, Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Kahmen, Ansgar" sort="Kahmen, Ansgar" uniqKey="Kahmen A" first="Ansgar" last="Kahmen">Ansgar Kahmen</name><affiliation><nlm:affiliation>Department of Environmental Sciences - Botany, University of Basel, 4056, Basel, Switzerland.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Plant, cell & environment</title><idno type="eISSN">1365-3040</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Distinguishing meteorological and plant mediated drivers of leaf water isotopic enrichment is prerequisite for ecological interpretations of stable hydrogen and oxygen isotopes in plant tissue. We measured input and leaf water δ(2) H and δ(18) O as well as micrometeorological and leaf morpho-physiological variables along a vertical gradient in a mature angiosperm (European beech) and gymnosperm (Douglas fir) tree. We used these variables and different enrichment models to quantify the influence of Péclet and non-steady state effects and of the biophysical drivers on leaf water enrichment. The two-pools model accurately described the diurnal variation of leaf water enrichment. The estimated unenriched water fraction was linked to leaf dry matter content across the canopy heights. Non-steady state effects and reduced stomatal conductance caused a higher enrichment of Douglas fir compared to beech leaf water. A dynamic effect analyses revealed that the light-induced vertical gradients of stomatal conductance and leaf temperature outbalanced each other in their effects on evaporative enrichment. We conclude that neither vertical canopy gradients nor the Péclet effect are important for estimates and interpretation of isotopic leaf water enrichment in hypostomatous trees. Contrarily, species-specific non-steady state effects and leaf temperatures as well as the water vapour isotope composition need careful consideration.</div></front></TEI><pubmed><MedlineCitation Status="Publisher" Owner="NLM"><PMID Version="1">28042668</PMID><DateCreated><Year>2017</Year><Month>01</Month><Day>02</Day></DateCreated><DateRevised><Year>2017</Year><Month>01</Month><Day>04</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1365-3040</ISSN><JournalIssue CitedMedium="Internet"><PubDate><Year>2017</Year><Month>Jan</Month><Day>01</Day></PubDate></JournalIssue><Title>Plant, cell & environment</Title><ISOAbbreviation>Plant Cell Environ.</ISOAbbreviation></Journal><ArticleTitle>Leaf water (18) O and (2) H enrichment along vertical canopy profiles in a broadleaved and a conifer forest tree.</ArticleTitle><ELocationID EIdType="doi" ValidYN="Y">10.1111/pce.12895</ELocationID><Abstract><AbstractText NlmCategory="UNASSIGNED">Distinguishing meteorological and plant mediated drivers of leaf water isotopic enrichment is prerequisite for ecological interpretations of stable hydrogen and oxygen isotopes in plant tissue. We measured input and leaf water δ(2) H and δ(18) O as well as micrometeorological and leaf morpho-physiological variables along a vertical gradient in a mature angiosperm (European beech) and gymnosperm (Douglas fir) tree. We used these variables and different enrichment models to quantify the influence of Péclet and non-steady state effects and of the biophysical drivers on leaf water enrichment. The two-pools model accurately described the diurnal variation of leaf water enrichment. The estimated unenriched water fraction was linked to leaf dry matter content across the canopy heights. Non-steady state effects and reduced stomatal conductance caused a higher enrichment of Douglas fir compared to beech leaf water. A dynamic effect analyses revealed that the light-induced vertical gradients of stomatal conductance and leaf temperature outbalanced each other in their effects on evaporative enrichment. We conclude that neither vertical canopy gradients nor the Péclet effect are important for estimates and interpretation of isotopic leaf water enrichment in hypostomatous trees. Contrarily, species-specific non-steady state effects and leaf temperatures as well as the water vapour isotope composition need careful consideration.</AbstractText><CopyrightInformation>This article is protected by copyright. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bögelein</LastName><ForeName>Rebekka</ForeName><Initials>R</Initials><Identifier Source="ORCID">http://orcid.org/0000-0002-4905-7994</Identifier><AffiliationInfo><Affiliation>Faculty of Regional and Environmental Sciences - Geobotany, University of Trier, 54296, Trier, Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Thomas</LastName><ForeName>Frank M</ForeName><Initials>FM</Initials><AffiliationInfo><Affiliation>Faculty of Regional and Environmental Sciences - Geobotany, University of Trier, 54296, Trier, Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kahmen</LastName><ForeName>Ansgar</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Department of Environmental Sciences - Botany, University of Basel, 4056, Basel, Switzerland.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>01</Month><Day>01</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Plant Cell Environ</MedlineTA><NlmUniqueID>9309004</NlmUniqueID><ISSNLinking>0140-7791</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Craig-Gordon model</Keyword><Keyword MajorTopicYN="N">Fagus sylvatica</Keyword><Keyword MajorTopicYN="N">Pseudotsuga menziesii</Keyword><Keyword MajorTopicYN="N">atmospheric water vapour</Keyword><Keyword MajorTopicYN="N">effective path length</Keyword><Keyword MajorTopicYN="N">leaf hydraulics</Keyword><Keyword MajorTopicYN="N">leaf water turnover</Keyword><Keyword MajorTopicYN="N">transpiration</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2016</Year><Month>04</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2016</Year><Month>12</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2016</Year><Month>12</Month><Day>28</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>1</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>1</Month><Day>4</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>1</Month><Day>4</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>aheadofprint</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28042668</ArticleId><ArticleId IdType="doi">10.1111/pce.12895</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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