Climate change interactions affect soil carbon dioxide efflux and microbial functioning in a post-harvest forest.
Identifieur interne : 000204 ( Main/Exploration ); précédent : 000203; suivant : 000205Climate change interactions affect soil carbon dioxide efflux and microbial functioning in a post-harvest forest.
Auteurs : M D Mcdaniel [États-Unis] ; J P Kaye ; M W Kaye ; M A BrunsSource :
- Oecologia [ 1432-1939 ] ; 2014.
Descripteurs français
- KwdFr :
- MESH :
- composition chimique : Dioxyde de carbone, Sol.
- métabolisme : Bactéries, Champignons.
- physiologie : Arbres.
- Changement climatique, Climat, Microbiologie du sol, Pennsylvanie, Température, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Carbon Dioxide, Soil.
- metabolism : Bacteria, Fungi.
- physiology : Trees.
- Climate, Climate Change, Ecosystem, Pennsylvania, Soil Microbiology, Temperature.
Abstract
Forest disturbances, including whole-tree harvest, will increase with a growing human population and its rising affluence. Following harvest, forests become sources of C to the atmosphere, partly because wetter and warmer soils (relative to pre-harvest) increase soil CO2 efflux. This relationship between soil microclimate and CO2 suggests that climate changes predicted for the northeastern US may exacerbate post-harvest CO2 losses. We tested this hypothesis using a climate-manipulation experiment within a recently harvested northeastern US forest with warmed (H; +2.5 °C), wetted (W; +23% precipitation), warmed + wetted (H+W), and ambient (A) treatments. The cumulative soil CO2 effluxes from H and W were 35% (P = 0.01) and 22% (P = 0.07) greater than A. However, cumulative efflux in H+W was similar to A and W, and 24% lower than in H (P = 0.02). These findings suggest that with higher precipitation soil CO2 efflux attenuates rapidly to warming, perhaps due to changes in substrate availability or microbial communities. Microbial function measured as CO2 response to 15 C substrates in warmed soils was distinct from non-warmed soils (P < 0.001). Furthermore, wetting lowered catabolic evenness (P = 0.04) and fungi-to-bacteria ratios (P = 0.03) relative to non-wetted treatments. A reciprocal transplant incubation showed that H+W microorganisms had lower laboratory respiration on their home soils (i.e., home substrates) than on soils from other treatments (P < 0.01). We inferred that H+W microorganisms may use a constrained suite of C substrates that become depleted in their "home" soils, and that in some disturbed ecosystems, a precipitation-induced attenuation (or suppression) of soil CO2 efflux to warming may result from fine-tuned microbe-substrate linkages.
DOI: 10.1007/s00442-013-2845-y
PubMed: 24362535
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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last="Mcdaniel">M D Mcdaniel</name><affiliation wicri:level="1"><nlm:affiliation>Department of Natural Resources and the Environment, University of New Hampshire, 114 James Hall, Durham, NH, 03824, USA, marshall.mcdaniel@unh.edu.</nlm:affiliation><country wicri:rule="url">États-Unis</country><wicri:regionArea>Department of Natural Resources and the Environment, University of New Hampshire, 114 James Hall, Durham, NH, 03824, USA</wicri:regionArea><wicri:noRegion>USA</wicri:noRegion></affiliation></author><author><name sortKey="Kaye, J P" sort="Kaye, J P" uniqKey="Kaye J" first="J P" last="Kaye">J P Kaye</name></author><author><name sortKey="Kaye, M W" sort="Kaye, M W" uniqKey="Kaye M" first="M W" last="Kaye">M W Kaye</name></author><author><name sortKey="Bruns, M A" sort="Bruns, M A" uniqKey="Bruns M" first="M A" last="Bruns">M A Bruns</name></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="2014" 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type="chemical" qualifier="chemistry" xml:lang="en"><term>Carbon Dioxide</term><term>Soil</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Dioxyde de carbone</term><term>Sol</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Bacteria</term><term>Fungi</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Bactéries</term><term>Champignons</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Arbres</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Trees</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Climate</term><term>Climate Change</term><term>Ecosystem</term><term>Pennsylvania</term><term>Soil Microbiology</term><term>Temperature</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Changement climatique</term><term>Climat</term><term>Microbiologie du sol</term><term>Pennsylvanie</term><term>Température</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Forest disturbances, including whole-tree harvest, will increase with a growing human population and its rising affluence. Following harvest, forests become sources of C to the atmosphere, partly because wetter and warmer soils (relative to pre-harvest) increase soil CO2 efflux. This relationship between soil microclimate and CO2 suggests that climate changes predicted for the northeastern US may exacerbate post-harvest CO2 losses. We tested this hypothesis using a climate-manipulation experiment within a recently harvested northeastern US forest with warmed (H; +2.5 °C), wetted (W; +23% precipitation), warmed + wetted (H+W), and ambient (A) treatments. The cumulative soil CO2 effluxes from H and W were 35% (P = 0.01) and 22% (P = 0.07) greater than A. However, cumulative efflux in H+W was similar to A and W, and 24% lower than in H (P = 0.02). These findings suggest that with higher precipitation soil CO2 efflux attenuates rapidly to warming, perhaps due to changes in substrate availability or microbial communities. Microbial function measured as CO2 response to 15 C substrates in warmed soils was distinct from non-warmed soils (P < 0.001). Furthermore, wetting lowered catabolic evenness (P = 0.04) and fungi-to-bacteria ratios (P = 0.03) relative to non-wetted treatments. A reciprocal transplant incubation showed that H+W microorganisms had lower laboratory respiration on their home soils (i.e., home substrates) than on soils from other treatments (P < 0.01). We inferred that H+W microorganisms may use a constrained suite of C substrates that become depleted in their "home" soils, and that in some disturbed ecosystems, a precipitation-induced attenuation (or suppression) of soil CO2 efflux to warming may result from fine-tuned microbe-substrate linkages.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">24362535</PMID><DateCompleted><Year>2014</Year><Month>10</Month><Day>10</Day></DateCompleted><DateRevised><Year>2018</Year><Month>12</Month><Day>02</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>174</Volume><Issue>4</Issue><PubDate><Year>2014</Year><Month>Apr</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Climate change interactions affect soil carbon dioxide efflux and microbial functioning in a post-harvest forest.</ArticleTitle><Pagination><MedlinePgn>1437-48</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s00442-013-2845-y</ELocationID><Abstract><AbstractText>Forest disturbances, including whole-tree harvest, will increase with a growing human population and its rising affluence. Following harvest, forests become sources of C to the atmosphere, partly because wetter and warmer soils (relative to pre-harvest) increase soil CO2 efflux. This relationship between soil microclimate and CO2 suggests that climate changes predicted for the northeastern US may exacerbate post-harvest CO2 losses. We tested this hypothesis using a climate-manipulation experiment within a recently harvested northeastern US forest with warmed (H; +2.5 °C), wetted (W; +23% precipitation), warmed + wetted (H+W), and ambient (A) treatments. The cumulative soil CO2 effluxes from H and W were 35% (P = 0.01) and 22% (P = 0.07) greater than A. However, cumulative efflux in H+W was similar to A and W, and 24% lower than in H (P = 0.02). These findings suggest that with higher precipitation soil CO2 efflux attenuates rapidly to warming, perhaps due to changes in substrate availability or microbial communities. Microbial function measured as CO2 response to 15 C substrates in warmed soils was distinct from non-warmed soils (P < 0.001). Furthermore, wetting lowered catabolic evenness (P = 0.04) and fungi-to-bacteria ratios (P = 0.03) relative to non-wetted treatments. A reciprocal transplant incubation showed that H+W microorganisms had lower laboratory respiration on their home soils (i.e., home substrates) than on soils from other treatments (P < 0.01). We inferred that H+W microorganisms may use a constrained suite of C substrates that become depleted in their "home" soils, and that in some disturbed ecosystems, a precipitation-induced attenuation (or suppression) of soil CO2 efflux to warming may result from fine-tuned microbe-substrate linkages.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>McDaniel</LastName><ForeName>M D</ForeName><Initials>MD</Initials><AffiliationInfo><Affiliation>Department of Natural Resources and the Environment, University of New Hampshire, 114 James Hall, Durham, NH, 03824, USA, marshall.mcdaniel@unh.edu.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kaye</LastName><ForeName>J P</ForeName><Initials>JP</Initials></Author><Author ValidYN="Y"><LastName>Kaye</LastName><ForeName>M W</ForeName><Initials>MW</Initials></Author><Author ValidYN="Y"><LastName>Bruns</LastName><ForeName>M A</ForeName><Initials>MA</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><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>2013</Year><Month>12</Month><Day>21</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="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>142M471B3J</RegistryNumber><NameOfSubstance UI="D002245">Carbon Dioxide</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001419" MajorTopicYN="N">Bacteria</DescriptorName><QualifierName UI="Q000378" 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last="Kaye">M W Kaye</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Mcdaniel, M D" sort="Mcdaniel, M D" uniqKey="Mcdaniel M" first="M D" last="Mcdaniel">M D Mcdaniel</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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