Modelling growth-competition relationships in trembling aspen and white spruce mixed boreal forests of Western Canada.
Identifieur interne : 002587 ( Main/Exploration ); précédent : 002586; suivant : 002588Modelling growth-competition relationships in trembling aspen and white spruce mixed boreal forests of Western Canada.
Auteurs : Jian-Guo Huang [Canada] ; Kenneth J. Stadt ; Andria Dawson ; Philip G. ComeauSource :
- PloS one [ 1932-6203 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Arbres, Picea, Populus, Tiges de plante.
- Canada, Écosystème, Études rétrospectives.
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- MESH :
- geographic : Canada.
- growth & development : Picea, Plant Stems, Populus, Trees.
- Ecosystem, Retrospective Studies.
Abstract
We examined the effect of competition on stem growth of Picea glauca and Populus tremuloides in boreal mixedwood stands during the stem exclusion stage. We combined traditional approaches of collecting competition data with dendrochronology to provide retrospective measurements of stem diameter growth. Several competition indices including stand basal area (BA), the sum of stem diameter at breast height (SDBH), and density (N) for the broadleaf and coniferous species, as well as similar indices considering only trees with diameters greater than each subject (BAGR, SDBHGR, and NGR), were evaluated. We used a nonlinear mixed model to characterize the basal area increment over the past 5, 10, 15, 20, 25, 30, and 35 years as a function of growth of nearby dominant trees, the size of the subject trees, deciduous and coniferous competition indices, and ecoregions. SDBHGR and BAGR were better predictors for spruce, and SDBHGR and NGR were better for aspen, respectively, than other indices. Results showed strongest correlations with long-term stem growth, as the best models integrated growth for 10-25 years for aspen and ≥ 25 for spruce. Our model demonstrated a remarkable capability (adjusted R(2)>0.67) to represent this complex variation in growth as a function of site, size and competition.
DOI: 10.1371/journal.pone.0077607
PubMed: 24204891
PubMed Central: PMC3812010
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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We combined traditional approaches of collecting competition data with dendrochronology to provide retrospective measurements of stem diameter growth. Several competition indices including stand basal area (BA), the sum of stem diameter at breast height (SDBH), and density (N) for the broadleaf and coniferous species, as well as similar indices considering only trees with diameters greater than each subject (BAGR, SDBHGR, and NGR), were evaluated. We used a nonlinear mixed model to characterize the basal area increment over the past 5, 10, 15, 20, 25, 30, and 35 years as a function of growth of nearby dominant trees, the size of the subject trees, deciduous and coniferous competition indices, and ecoregions. SDBHGR and BAGR were better predictors for spruce, and SDBHGR and NGR were better for aspen, respectively, than other indices. Results showed strongest correlations with long-term stem growth, as the best models integrated growth for 10-25 years for aspen and ≥ 25 for spruce. Our model demonstrated a remarkable capability (adjusted R(2)>0.67) to represent this complex variation in growth as a function of site, size and competition.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">24204891</PMID><DateCompleted><Year>2014</Year><Month>08</Month><Day>05</Day></DateCompleted><DateRevised><Year>2019</Year><Month>02</Month><Day>26</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1932-6203</ISSN><JournalIssue CitedMedium="Internet"><Volume>8</Volume><Issue>10</Issue><PubDate><Year>2013</Year></PubDate></JournalIssue><Title>PloS one</Title><ISOAbbreviation>PLoS One</ISOAbbreviation></Journal><ArticleTitle>Modelling growth-competition relationships in trembling aspen and white spruce mixed boreal forests of Western Canada.</ArticleTitle><Pagination><MedlinePgn>e77607</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1371/journal.pone.0077607</ELocationID><Abstract><AbstractText>We examined the effect of competition on stem growth of Picea glauca and Populus tremuloides in boreal mixedwood stands during the stem exclusion stage. We combined traditional approaches of collecting competition data with dendrochronology to provide retrospective measurements of stem diameter growth. Several competition indices including stand basal area (BA), the sum of stem diameter at breast height (SDBH), and density (N) for the broadleaf and coniferous species, as well as similar indices considering only trees with diameters greater than each subject (BAGR, SDBHGR, and NGR), were evaluated. We used a nonlinear mixed model to characterize the basal area increment over the past 5, 10, 15, 20, 25, 30, and 35 years as a function of growth of nearby dominant trees, the size of the subject trees, deciduous and coniferous competition indices, and ecoregions. SDBHGR and BAGR were better predictors for spruce, and SDBHGR and NGR were better for aspen, respectively, than other indices. Results showed strongest correlations with long-term stem growth, as the best models integrated growth for 10-25 years for aspen and ≥ 25 for spruce. 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Comeau</name><name sortKey="Dawson, Andria" sort="Dawson, Andria" uniqKey="Dawson A" first="Andria" last="Dawson">Andria Dawson</name><name sortKey="Stadt, Kenneth J" sort="Stadt, Kenneth J" uniqKey="Stadt K" first="Kenneth J" last="Stadt">Kenneth J. Stadt</name></noCountry><country name="Canada"><noRegion><name sortKey="Huang, Jian Guo" sort="Huang, Jian Guo" uniqKey="Huang J" first="Jian-Guo" last="Huang">Jian-Guo Huang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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