Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming.
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Auteurs : Christopher W. Fernandez [États-Unis] ; Katherine Heckman [États-Unis] ; Randall Kolka [États-Unis] ; Peter G. Kennedy [États-Unis]Source :
- Ecology letters [ 1461-0248 ] ; 2019.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical : Melanins, Soil.
- Carbon Cycle, Climate Change, Ecosystem, Mycorrhizae.
Abstract
Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.
DOI: 10.1111/ele.13209
PubMed: 30609141
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Fernandez</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN</wicri:regionArea></affiliation></author><author><name sortKey="Heckman, Katherine" sort="Heckman, Katherine" uniqKey="Heckman K" first="Katherine" last="Heckman">Katherine Heckman</name><affiliation wicri:level="1"><nlm:affiliation>USDA Forest Service Northern Research Station, Houghton, MI, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>USDA Forest Service Northern Research Station, Houghton, MI</wicri:regionArea></affiliation></author><author><name sortKey="Kolka, Randall" sort="Kolka, Randall" uniqKey="Kolka R" first="Randall" last="Kolka">Randall Kolka</name><affiliation wicri:level="1"><nlm:affiliation>USDA Forest Service Northern Research Station, Grand Rapids,, MN, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>USDA Forest Service Northern Research Station, Grand Rapids,, MN</wicri:regionArea></affiliation></author><author><name sortKey="Kennedy, Peter G" sort="Kennedy, Peter G" uniqKey="Kennedy P" first="Peter G" last="Kennedy">Peter G. 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Kennedy</name><affiliation wicri:level="1"><nlm:affiliation>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN</wicri:regionArea></affiliation><affiliation wicri:level="1"><nlm:affiliation>Department of Ecology, Evolution, and Behavior St. Paul, MN, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Ecology, Evolution, and Behavior St. Paul, MN</wicri:regionArea></affiliation></author></analytic><series><title level="j">Ecology letters</title><idno type="eISSN">1461-0248</idno><imprint><date when="2019" type="published">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon Cycle (MeSH)</term><term>Climate Change (MeSH)</term><term>Ecosystem (MeSH)</term><term>Melanins (MeSH)</term><term>Mycorrhizae (MeSH)</term><term>Soil (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Changement climatique (MeSH)</term><term>Cycle du carbone (MeSH)</term><term>Mycorhizes (MeSH)</term><term>Mélanines (MeSH)</term><term>Sol (MeSH)</term><term>Écosystème (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Melanins</term><term>Soil</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Carbon Cycle</term><term>Climate Change</term><term>Ecosystem</term><term>Mycorrhizae</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Changement climatique</term><term>Cycle du carbone</term><term>Mycorhizes</term><term>Mélanines</term><term>Sol</term><term>Écosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">30609141</PMID><DateCompleted><Year>2019</Year><Month>08</Month><Day>07</Day></DateCompleted><DateRevised><Year>2019</Year><Month>08</Month><Day>07</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1461-0248</ISSN><JournalIssue CitedMedium="Internet"><Volume>22</Volume><Issue>3</Issue><PubDate><Year>2019</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Ecology letters</Title><ISOAbbreviation>Ecol Lett</ISOAbbreviation></Journal><ArticleTitle>Melanin mitigates the accelerated decay of mycorrhizal necromass with peatland warming.</ArticleTitle><Pagination><MedlinePgn>498-505</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/ele.13209</ELocationID><Abstract><AbstractText>Despite being a significant input into soil carbon pools of many high-latitude ecosystems, little is known about the effects of climate change on the turnover of mycorrhizal fungal necromass. Here, we present results from the first experiment examining the effects of climate change on the long-term decomposition of mycorrhizal necromass, utilising the Spruce and Peatland Response Under Changing Environments (SPRUCE) experiment. Warming significantly increased necromass decomposition rates but was strongest in normally submerged microsites where warming caused water table drawdown. Necromass chemistry exerted the strongest control on the decomposition, with initial nitrogen content strongly predicting early decay rates (3 months) and initial melanin content determining mass remaining after 2 years. Collectively, our results suggest that as global temperatures rise, variation in species biochemical traits as well as microsites where mycorrhizal necromass is deposited will determine how these important inputs contribute to the belowground storage of carbon in boreal peatlands.</AbstractText><CopyrightInformation>© 2019 John Wiley & Sons Ltd/CNRS.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Fernandez</LastName><ForeName>Christopher W</ForeName><Initials>CW</Initials><AffiliationInfo><Affiliation>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Heckman</LastName><ForeName>Katherine</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>USDA Forest Service Northern Research Station, Houghton, MI, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kolka</LastName><ForeName>Randall</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>USDA Forest Service Northern Research Station, Grand Rapids,, MN, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kennedy</LastName><ForeName>Peter G</ForeName><Initials>PG</Initials><AffiliationInfo><Affiliation>Department of Plant & Microbial Biology, University of Minnesota St. Paul, MN, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Ecology, Evolution, and Behavior St. Paul, MN, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>1554375</GrantID><Agency>NSF-DEB</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016422">Letter</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2019</Year><Month>01</Month><Day>04</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Ecol Lett</MedlineTA><NlmUniqueID>101121949</NlmUniqueID><ISSNLinking>1461-023X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D008543">Melanins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical></ChemicalList><MeshHeadingList><MeshHeading><DescriptorName UI="D057486" MajorTopicYN="N">Carbon Cycle</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D057231" MajorTopicYN="Y">Climate Change</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="N">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008543" MajorTopicYN="N">Melanins</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="Y">Mycorrhizae</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Bog microtopography</Keyword><Keyword MajorTopicYN="N">carbon cycling</Keyword><Keyword MajorTopicYN="N">decomposition</Keyword><Keyword MajorTopicYN="N">microbial residues</Keyword><Keyword MajorTopicYN="N">nitrogen cycling</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2018</Year><Month>09</Month><Day>20</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2018</Year><Month>10</Month><Day>24</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2018</Year><Month>11</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>1</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2019</Year><Month>8</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>1</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">30609141</ArticleId><ArticleId IdType="doi">10.1111/ele.13209</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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