Carbon isotope discrimination and water stress in trembling aspen following variable retention harvesting.
Identifieur interne : 003C30 ( Main/Exploration ); précédent : 003C29; suivant : 003C31Carbon isotope discrimination and water stress in trembling aspen following variable retention harvesting.
Auteurs : Kevin D. Bladon [Canada] ; Uldis Silins ; Simon M. Landh Usser ; Christian Messier ; Victor J. LieffersSource :
- Tree physiology [ 0829-318X ] ; 2007.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Bois, Populus.
- métabolisme : Bois, Carbone, Eau, Isotopes du carbone, Populus.
- méthodes : Science forêt.
- Alberta, Québec, Écosystème.
English descriptors
- KwdEn :
- MESH :
Abstract
Variable retention harvesting (VRH) has been proposed as a silvicultural practice to maintain biodiversity and ecosystem integrity. No previous study has examined tree carbon isotope discrimination to provide insights into water stress that could lead to dieback and mortality of trees following VRH. We measured and compared the carbon isotope ratios (delta(13)C) in stem wood of trembling aspen (Populus tremuloides Michx.) before and after VRH. Eight trees were sampled from isolated residual, edge and control (interior of unharvested stand) positions from each of seven plots in three regions (Calling Lake and Drayton Valley, Alberta and Lac Duparquet, Québec). After VRH, the general trend in mean delta(13)C was residual > edge > control trees. Although this trend is indicative of water stress in residual trees, it also suggests that edge trees received some sheltering effect, reducing their stress compared with that of residuals. A strong inverse relationship was found between the delta(13)C values and the mean annual precipitation in each region. The trend in mean delta(13)C signature was Calling Lake > Drayton Valley > Lac Duparquet trees. These results suggest that residual or edge trees in drier regions are more likely to suffer water stress following VRH. We also observed a trend of greater delta(13)C in stout trees compared with slender trees, both before and after VRH. The evidence of greater water stress in stout trees likely occurred because of a positive relationship between stem diameter and crown volume per basal area. Our results provide evidence that water stress could be the driving mechanism leading to dieback and mortality of residual trees shortly after VRH. Additionally, the results from edge trees indicate that leaving hardwood residuals in larger patches or more sheltered landscape positions could reduce the water stress to which these trees are subjected, thereby reducing dieback and mortality.
DOI: 10.1093/treephys/27.7.1065
PubMed: 17403660
Affiliations:
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Bladon</name><affiliation wicri:level="1"><nlm:affiliation>Centre for Enhanced Forest Management, Department of Renewable Resources, 442 Earth Sciences Building, University of Alberta, Edmonton, AB T6G 2E3, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Centre for Enhanced Forest Management, Department of Renewable Resources, 442 Earth Sciences Building, University of Alberta, Edmonton, AB T6G 2E3</wicri:regionArea><wicri:noRegion>AB T6G 2E3</wicri:noRegion></affiliation></author><author><name sortKey="Silins, Uldis" sort="Silins, Uldis" uniqKey="Silins U" first="Uldis" last="Silins">Uldis Silins</name></author><author><name sortKey="Landh Usser, Simon M" sort="Landh Usser, Simon M" uniqKey="Landh Usser S" first="Simon M" last="Landh Usser">Simon M. Landh Usser</name></author><author><name sortKey="Messier, Christian" sort="Messier, Christian" uniqKey="Messier C" first="Christian" last="Messier">Christian Messier</name></author><author><name sortKey="Lieffers, Victor J" sort="Lieffers, Victor J" uniqKey="Lieffers V" first="Victor J" last="Lieffers">Victor J. Lieffers</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="RBID">pubmed:17403660</idno><idno type="pmid">17403660</idno><idno type="doi">10.1093/treephys/27.7.1065</idno><idno type="wicri:Area/Main/Corpus">003B91</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003B91</idno><idno type="wicri:Area/Main/Curation">003B91</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003B91</idno><idno type="wicri:Area/Main/Exploration">003B91</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Carbon isotope discrimination and water stress in trembling aspen following variable retention harvesting.</title><author><name sortKey="Bladon, Kevin D" sort="Bladon, Kevin D" uniqKey="Bladon K" first="Kevin D" last="Bladon">Kevin D. 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Lieffers</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alberta (MeSH)</term><term>Carbon (metabolism)</term><term>Carbon Isotopes (metabolism)</term><term>Ecosystem (MeSH)</term><term>Forestry (methods)</term><term>Populus (growth & development)</term><term>Populus (metabolism)</term><term>Quebec (MeSH)</term><term>Water (metabolism)</term><term>Wood (growth & development)</term><term>Wood (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Alberta (MeSH)</term><term>Bois (croissance et développement)</term><term>Bois (métabolisme)</term><term>Carbone (métabolisme)</term><term>Eau (métabolisme)</term><term>Isotopes du carbone (métabolisme)</term><term>Populus (croissance et développement)</term><term>Populus (métabolisme)</term><term>Québec (MeSH)</term><term>Science forêt (méthodes)</term><term>Écosystème (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term><term>Carbon Isotopes</term><term>Water</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Alberta</term><term>Quebec</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Bois</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Populus</term><term>Wood</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Populus</term><term>Wood</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Forestry</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Bois</term><term>Carbone</term><term>Eau</term><term>Isotopes du carbone</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="méthodes" xml:lang="fr"><term>Science forêt</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Ecosystem</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Alberta</term><term>Québec</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Variable retention harvesting (VRH) has been proposed as a silvicultural practice to maintain biodiversity and ecosystem integrity. No previous study has examined tree carbon isotope discrimination to provide insights into water stress that could lead to dieback and mortality of trees following VRH. We measured and compared the carbon isotope ratios (delta(13)C) in stem wood of trembling aspen (Populus tremuloides Michx.) before and after VRH. Eight trees were sampled from isolated residual, edge and control (interior of unharvested stand) positions from each of seven plots in three regions (Calling Lake and Drayton Valley, Alberta and Lac Duparquet, Québec). After VRH, the general trend in mean delta(13)C was residual > edge > control trees. Although this trend is indicative of water stress in residual trees, it also suggests that edge trees received some sheltering effect, reducing their stress compared with that of residuals. A strong inverse relationship was found between the delta(13)C values and the mean annual precipitation in each region. The trend in mean delta(13)C signature was Calling Lake > Drayton Valley > Lac Duparquet trees. These results suggest that residual or edge trees in drier regions are more likely to suffer water stress following VRH. We also observed a trend of greater delta(13)C in stout trees compared with slender trees, both before and after VRH. The evidence of greater water stress in stout trees likely occurred because of a positive relationship between stem diameter and crown volume per basal area. Our results provide evidence that water stress could be the driving mechanism leading to dieback and mortality of residual trees shortly after VRH. Additionally, the results from edge trees indicate that leaving hardwood residuals in larger patches or more sheltered landscape positions could reduce the water stress to which these trees are subjected, thereby reducing dieback and mortality.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">17403660</PMID><DateCompleted><Year>2007</Year><Month>09</Month><Day>11</Day></DateCompleted><DateRevised><Year>2019</Year><Month>05</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>27</Volume><Issue>7</Issue><PubDate><Year>2007</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Carbon isotope discrimination and water stress in trembling aspen following variable retention harvesting.</ArticleTitle><Pagination><MedlinePgn>1065-71</MedlinePgn></Pagination><Abstract><AbstractText>Variable retention harvesting (VRH) has been proposed as a silvicultural practice to maintain biodiversity and ecosystem integrity. No previous study has examined tree carbon isotope discrimination to provide insights into water stress that could lead to dieback and mortality of trees following VRH. We measured and compared the carbon isotope ratios (delta(13)C) in stem wood of trembling aspen (Populus tremuloides Michx.) before and after VRH. Eight trees were sampled from isolated residual, edge and control (interior of unharvested stand) positions from each of seven plots in three regions (Calling Lake and Drayton Valley, Alberta and Lac Duparquet, Québec). After VRH, the general trend in mean delta(13)C was residual > edge > control trees. Although this trend is indicative of water stress in residual trees, it also suggests that edge trees received some sheltering effect, reducing their stress compared with that of residuals. A strong inverse relationship was found between the delta(13)C values and the mean annual precipitation in each region. The trend in mean delta(13)C signature was Calling Lake > Drayton Valley > Lac Duparquet trees. These results suggest that residual or edge trees in drier regions are more likely to suffer water stress following VRH. We also observed a trend of greater delta(13)C in stout trees compared with slender trees, both before and after VRH. The evidence of greater water stress in stout trees likely occurred because of a positive relationship between stem diameter and crown volume per basal area. Our results provide evidence that water stress could be the driving mechanism leading to dieback and mortality of residual trees shortly after VRH. 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Landh Usser</name><name sortKey="Lieffers, Victor J" sort="Lieffers, Victor J" uniqKey="Lieffers V" first="Victor J" last="Lieffers">Victor J. Lieffers</name><name sortKey="Messier, Christian" sort="Messier, Christian" uniqKey="Messier C" first="Christian" last="Messier">Christian Messier</name><name sortKey="Silins, Uldis" sort="Silins, Uldis" uniqKey="Silins U" first="Uldis" last="Silins">Uldis Silins</name></noCountry><country name="Canada"><noRegion><name sortKey="Bladon, Kevin D" sort="Bladon, Kevin D" uniqKey="Bladon K" first="Kevin D" last="Bladon">Kevin D. Bladon</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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