Belowground carbon cycling in a humid tropical forest decreases with fertilization.
Identifieur interne : 003815 ( Main/Exploration ); précédent : 003814; suivant : 003816Belowground carbon cycling in a humid tropical forest decreases with fertilization.
Auteurs : Christian P. Giardina [États-Unis] ; Dan Binkley ; Michael G. Ryan ; James H. Fownes ; Randy S. SenockSource :
- Oecologia [ 0029-8549 ] ; 2004.
Descripteurs français
- KwdFr :
- MESH :
- composition chimique : Feuilles de plante.
- physiologie : Arbres, Carbone.
- Climat tropical, Hawaï, Humidité, Isotopes du carbone, Modèles biologiques, Phénomènes physiologiques des plantes, Sol.
English descriptors
- KwdEn :
- MESH :
- chemical , physiology : Carbon.
- chemical : Carbon Isotopes, Soil.
- chemistry : Plant Leaves.
- physiology : Trees.
- Hawaii, Humidity, Models, Biological, Plant Physiological Phenomena, Tropical Climate.
Abstract
Only a small fraction of the carbon (C) allocated belowground by trees is retained by soils in long-lived, decay-resistant forms, yet because of the large magnitude of terrestrial primary productivity, even small changes in C allocation or retention can alter terrestrial C storage. The humid tropics exert a disproportionately large influence over terrestrial C storage, but C allocation and belowground retention in these ecosystems remain poorly quantified. Using mass balance and 13C isotope methods, we examined the effects of afforestation and fertilization, two land-use changes of large-scale importance, on belowground C cycling at a humid tropical site in Hawaii. Here we report that in unfertilized plots, 80% of the C allocated belowground by trees to roots and mycorrhizae was returned to the atmosphere within 1 year; 9% of the belowground C flux was retained in coarse roots and 11% was retained as new soil C. The gains in new soil C were offset entirely by losses of old soil C. Further, while fertilization early in stand development increased C storage in the litter layer and in coarse roots, it reduced by 22% the flux of C moving through roots and mycorrhizae into mineral soils. Because soil C formation rates related strongly to rhizosphere C flux, fertilization may reduce an already limited capacity of these forests to sequester decay-resistant soil C.
DOI: 10.1007/s00442-004-1552-0
PubMed: 15071736
Affiliations:
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Giardina</name><affiliation wicri:level="2"><nlm:affiliation>United States Department of Agriculture-Forest Service, North Central Research Station, 410 MacInnes Drive, Houghton, MI 49931, USA. cgiardina@fs.fed.us</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>United States Department of Agriculture-Forest Service, North Central Research Station, 410 MacInnes Drive, Houghton, MI 49931</wicri:regionArea><placeName><region type="state">Michigan</region></placeName></affiliation></author><author><name sortKey="Binkley, Dan" sort="Binkley, Dan" uniqKey="Binkley D" first="Dan" last="Binkley">Dan Binkley</name></author><author><name sortKey="Ryan, Michael G" sort="Ryan, Michael G" uniqKey="Ryan M" first="Michael G" last="Ryan">Michael G. Ryan</name></author><author><name sortKey="Fownes, James H" sort="Fownes, James H" uniqKey="Fownes J" first="James H" last="Fownes">James H. Fownes</name></author><author><name sortKey="Senock, Randy S" sort="Senock, Randy S" uniqKey="Senock R" first="Randy S" last="Senock">Randy S. 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The humid tropics exert a disproportionately large influence over terrestrial C storage, but C allocation and belowground retention in these ecosystems remain poorly quantified. Using mass balance and 13C isotope methods, we examined the effects of afforestation and fertilization, two land-use changes of large-scale importance, on belowground C cycling at a humid tropical site in Hawaii. Here we report that in unfertilized plots, 80% of the C allocated belowground by trees to roots and mycorrhizae was returned to the atmosphere within 1 year; 9% of the belowground C flux was retained in coarse roots and 11% was retained as new soil C. The gains in new soil C were offset entirely by losses of old soil C. Further, while fertilization early in stand development increased C storage in the litter layer and in coarse roots, it reduced by 22% the flux of C moving through roots and mycorrhizae into mineral soils. Because soil C formation rates related strongly to rhizosphere C flux, fertilization may reduce an already limited capacity of these forests to sequester decay-resistant soil C.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15071736</PMID><DateCompleted><Year>2004</Year><Month>07</Month><Day>29</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0029-8549</ISSN><JournalIssue CitedMedium="Print"><Volume>139</Volume><Issue>4</Issue><PubDate><Year>2004</Year><Month>May</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Belowground carbon cycling in a humid tropical forest decreases with fertilization.</ArticleTitle><Pagination><MedlinePgn>545-50</MedlinePgn></Pagination><Abstract><AbstractText>Only a small fraction of the carbon (C) allocated belowground by trees is retained by soils in long-lived, decay-resistant forms, yet because of the large magnitude of terrestrial primary productivity, even small changes in C allocation or retention can alter terrestrial C storage. The humid tropics exert a disproportionately large influence over terrestrial C storage, but C allocation and belowground retention in these ecosystems remain poorly quantified. Using mass balance and 13C isotope methods, we examined the effects of afforestation and fertilization, two land-use changes of large-scale importance, on belowground C cycling at a humid tropical site in Hawaii. Here we report that in unfertilized plots, 80% of the C allocated belowground by trees to roots and mycorrhizae was returned to the atmosphere within 1 year; 9% of the belowground C flux was retained in coarse roots and 11% was retained as new soil C. The gains in new soil C were offset entirely by losses of old soil C. Further, while fertilization early in stand development increased C storage in the litter layer and in coarse roots, it reduced by 22% the flux of C moving through roots and mycorrhizae into mineral soils. Because soil C formation rates related strongly to rhizosphere C flux, fertilization may reduce an already limited capacity of these forests to sequester decay-resistant soil C.</AbstractText><CopyrightInformation>Copyright 2004 Springer-Verlag</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Giardina</LastName><ForeName>Christian P</ForeName><Initials>CP</Initials><AffiliationInfo><Affiliation>United States Department of Agriculture-Forest Service, North Central Research Station, 410 MacInnes Drive, Houghton, MI 49931, USA. cgiardina@fs.fed.us</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Binkley</LastName><ForeName>Dan</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Ryan</LastName><ForeName>Michael G</ForeName><Initials>MG</Initials></Author><Author ValidYN="Y"><LastName>Fownes</LastName><ForeName>James H</ForeName><Initials>JH</Initials></Author><Author ValidYN="Y"><LastName>Senock</LastName><ForeName>Randy S</ForeName><Initials>RS</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D003160">Comparative Study</PublicationType><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2004</Year><Month>04</Month><Day>08</Day></ArticleDate></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D002247">Carbon Isotopes</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance 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Phenomena</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="Y">Soil</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014329" MajorTopicYN="N">Tropical Climate</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2003</Year><Month>09</Month><Day>17</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2004</Year><Month>03</Month><Day>05</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2004</Year><Month>4</Month><Day>9</Day><Hour>5</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2004</Year><Month>7</Month><Day>30</Day><Hour>5</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate 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24;411(6836):466-9</Citation><ArticleIdList><ArticleId IdType="pubmed">11373676</ArticleId></ArticleIdList></Reference><Reference><Citation>Nature. 2001 Jun 14;411(6839):789-92</Citation><ArticleIdList><ArticleId IdType="pubmed">11459055</ArticleId></ArticleIdList></Reference><Reference><Citation>Nature. 2000 Nov 9;408(6809):184-7</Citation><ArticleIdList><ArticleId IdType="pubmed">11089968</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Michigan</li></region></list><tree><noCountry><name sortKey="Binkley, Dan" sort="Binkley, Dan" uniqKey="Binkley D" first="Dan" last="Binkley">Dan Binkley</name><name sortKey="Fownes, James H" sort="Fownes, James H" uniqKey="Fownes J" first="James H" last="Fownes">James H. Fownes</name><name sortKey="Ryan, Michael G" sort="Ryan, Michael G" uniqKey="Ryan M" first="Michael G" last="Ryan">Michael G. Ryan</name><name sortKey="Senock, Randy S" sort="Senock, Randy S" uniqKey="Senock R" first="Randy S" last="Senock">Randy S. Senock</name></noCountry><country name="États-Unis"><region name="Michigan"><name sortKey="Giardina, Christian P" sort="Giardina, Christian P" uniqKey="Giardina C" first="Christian P" last="Giardina">Christian P. Giardina</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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