Carbon isotope composition of boreal plants: functional grouping of life forms.
Identifieur interne : 004A08 ( Main/Exploration ); précédent : 004A07; suivant : 004A09Carbon isotope composition of boreal plants: functional grouping of life forms.
Auteurs : J R Brooks [États-Unis] ; Lawrence B. Flanagan [États-Unis] ; N. Buchmann [États-Unis] ; James R. Ehleringer [États-Unis]Source :
- Oecologia [ 1432-1939 ] ; 1997.
Abstract
We tested the hypothesis that life forms (trees, shrubs, forbs, and mosses; deciduous or evergreen) can be used to group plants with similar physiological characteristics. Carbon isotope ratios (δ13C) and carbon isotope discrimination (Δ) were used as functional characteristics because δ13C and Δ integrate information about CO2 and water fluxes, and so are useful in global change and scaling studies. We examined δ13C values of the dominant species in three boreal forest ecosystems: wet Picea mariana stands, mesic Populus tremuloides stands, and dry Pinus banksiana stands. Life form groups explained a significant fraction of the variation in leaf carbon isotope composition; seven life-form categories explained 50% of the variation in δ13C and 42% of the variation in Δ and 52% of the variance not due to intraspecific genetic differences (n=335). The life forms were ranked in the following order based on their values: evergreen trees2 (c i/c a) than did evergreen leaves in a similar environment within these boreal ecosystems. We found the same pattern of carbon isotope discrimination in a year with above-average precipitation as in a year with below-average precipitation, indicating that environmental fluctuations did not affect the ranking of life forms. Furthermore, plants from sites near the northern and southern boundaries of the boreal forest had similar patterns of discrimination. We concluded that life forms are robust indicators of functional groups that are related to carbon and water fluxes within boreal ecosystems.
DOI: 10.1007/s004420050163
PubMed: 28307218
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Flanagan</name><affiliation wicri:level="2"><nlm:affiliation>Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada, , , , , , CA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada, , , , , </wicri:cityArea></affiliation></author><author><name sortKey="Buchmann, N" sort="Buchmann, N" uniqKey="Buchmann N" first="N" last="Buchmann">N. Buchmann</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , , US.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , </wicri:regionArea><wicri:noRegion></wicri:noRegion></affiliation></author><author><name sortKey="Ehleringer, James R" sort="Ehleringer, James R" uniqKey="Ehleringer J" first="James R" last="Ehleringer">James R. Ehleringer</name><affiliation wicri:level="1"><nlm:affiliation>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , , US.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , </wicri:regionArea><wicri:noRegion></wicri:noRegion></affiliation></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="1997" type="published">1997</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"> We tested the hypothesis that life forms (trees, shrubs, forbs, and mosses; deciduous or evergreen) can be used to group plants with similar physiological characteristics. Carbon isotope ratios (δ<sup>13</sup>C) and carbon isotope discrimination (Δ) were used as functional characteristics because δ<sup>13</sup>C and Δ integrate information about CO<sub>2</sub> and water fluxes, and so are useful in global change and scaling studies. We examined δ<sup>13</sup>C values of the dominant species in three boreal forest ecosystems: wet Picea mariana stands, mesic Populus tremuloides stands, and dry Pinus banksiana stands. Life form groups explained a significant fraction of the variation in leaf carbon isotope composition; seven life-form categories explained 50% of the variation in δ<sup>13</sup>C and 42% of the variation in Δ and 52% of the variance not due to intraspecific genetic differences (n=335). The life forms were ranked in the following order based on their values: evergreen trees<sub>2</sub> (c <sub>i</sub>/c <sub>a</sub>) than did evergreen leaves in a similar environment within these boreal ecosystems. We found the same pattern of carbon isotope discrimination in a year with above-average precipitation as in a year with below-average precipitation, indicating that environmental fluctuations did not affect the ranking of life forms. Furthermore, plants from sites near the northern and southern boundaries of the boreal forest had similar patterns of discrimination. We concluded that life forms are robust indicators of functional groups that are related to carbon and water fluxes within boreal ecosystems.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">28307218</PMID><DateRevised><Year>2019</Year><Month>11</Month><Day>20</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>110</Volume><Issue>3</Issue><PubDate><Year>1997</Year><Month>Apr</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Carbon isotope composition of boreal plants: functional grouping of life forms.</ArticleTitle><Pagination><MedlinePgn>301-311</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s004420050163</ELocationID><Abstract><AbstractText> We tested the hypothesis that life forms (trees, shrubs, forbs, and mosses; deciduous or evergreen) can be used to group plants with similar physiological characteristics. Carbon isotope ratios (δ<sup>13</sup>C) and carbon isotope discrimination (Δ) were used as functional characteristics because δ<sup>13</sup>C and Δ integrate information about CO<sub>2</sub> and water fluxes, and so are useful in global change and scaling studies. We examined δ<sup>13</sup>C values of the dominant species in three boreal forest ecosystems: wet Picea mariana stands, mesic Populus tremuloides stands, and dry Pinus banksiana stands. Life form groups explained a significant fraction of the variation in leaf carbon isotope composition; seven life-form categories explained 50% of the variation in δ<sup>13</sup>C and 42% of the variation in Δ and 52% of the variance not due to intraspecific genetic differences (n=335). The life forms were ranked in the following order based on their values: evergreen trees<sub>2</sub> (c <sub>i</sub>/c <sub>a</sub>) than did evergreen leaves in a similar environment within these boreal ecosystems. We found the same pattern of carbon isotope discrimination in a year with above-average precipitation as in a year with below-average precipitation, indicating that environmental fluctuations did not affect the ranking of life forms. Furthermore, plants from sites near the northern and southern boundaries of the boreal forest had similar patterns of discrimination. We concluded that life forms are robust indicators of functional groups that are related to carbon and water fluxes within boreal ecosystems.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Brooks</LastName><ForeName>J R</ForeName><Initials>JR</Initials><AffiliationInfo><Affiliation>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , , US.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Flanagan</LastName><ForeName>Lawrence B</ForeName><Initials>LB</Initials><AffiliationInfo><Affiliation>Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada, , , , , , CA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Buchmann</LastName><ForeName>N</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , , US.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ehleringer</LastName><ForeName>James R</ForeName><Initials>JR</Initials><AffiliationInfo><Affiliation>Department of Biology, Stable Isotope Ratio Facility for Environmental Research, University of Utah, Salt Lake City, UT 84112, USA, , , , , , US.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Boreal forests</Keyword><Keyword MajorTopicYN="N">Carbon isotope discrimination</Keyword><Keyword MajorTopicYN="N">Deciduous/ evergreen</Keyword><Keyword MajorTopicYN="N">Key words Functional groups</Keyword><Keyword MajorTopicYN="N">Life forms</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>3</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>1997</Year><Month>4</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1997</Year><Month>4</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28307218</ArticleId><ArticleId IdType="doi">10.1007/s004420050163</ArticleId><ArticleId IdType="pii">10.1007/s004420050163</ArticleId></ArticleIdList></PubmedData>
