Importance of dispersal and thermal environment for mycorrhizal communities: lessons from Yellowstone National Park.
Identifieur interne : 002238 ( Main/Corpus ); précédent : 002237; suivant : 002239Importance of dispersal and thermal environment for mycorrhizal communities: lessons from Yellowstone National Park.
Auteurs : Ylva Lekberg ; James Meadow ; Jason R. Rohr ; Dirk Redecker ; Catherine A. ZabinskiSource :
- Ecology [ 0012-9658 ] ; 2011.
English descriptors
- KwdEn :
- Animals (MeSH), Bison (MeSH), Ecosystem (MeSH), Hot Springs (MeSH), Hydrogen-Ion Concentration (MeSH), Mycorrhizae (classification), Mycorrhizae (genetics), Poaceae (microbiology), Polymorphism, Restriction Fragment Length (MeSH), Soil (chemistry), Soil Microbiology (MeSH), Temperature (MeSH), Wyoming (MeSH).
- MESH :
- chemical , chemistry : Soil.
- classification : Mycorrhizae.
- genetics : Mycorrhizae.
- microbiology : Poaceae.
- Animals, Bison, Ecosystem, Hot Springs, Hydrogen-Ion Concentration, Polymorphism, Restriction Fragment Length, Soil Microbiology, Temperature, Wyoming.
Abstract
The relative importance of dispersal and niche restrictions remains a controversial topic in community ecology, especially for microorganisms that are often assumed to be ubiquitous. We investigated the impact of these factors for the community assembly of the root-symbiont arbuscular mycorrhizal fungi (AMF) by sampling roots from geothermal and nonthermal grasslands in Yellowstone National Park (YNP), followed by sequencing and RFLP of AMF ribosomal DNA. With the exception of an apparent generalist RFLP type closely related to Glomus intraradices, a distance-based redundancy analysis indicated that the AMF community composition correlated with soil pH or pH-driven changes in soil chemistry. This was unexpected, given the large differences in soil temperature and plant community composition between the geothermal and nonthermal grasslands. RFLP types were found in either the acidic geothermal grasslands or in the neutral to alkaline grasslands, one of which was geothermal. The direct effect of the soil chemical environment on the distribution of two AMF morphospecies isolated from acidic geothermal grasslands was supported in a controlled greenhouse experiment. Paraglomus occultum and Scutellospora pellucida were more beneficial to plants and formed significantly more spores when grown in acidic than in alkaline soil. Distance among grasslands, used as an estimate of dispersal limitations, was not a significant predictor of AMF community similarity within YNP, and most fungal taxa may be part of a metacommunity. The isolation of several viable AMF taxa from bison feces indicates that wide-ranging bison could be a vector for at least some RFLP types among grasslands within YNP. In support of classical niche theory and the Baas-Becking hypothesis, our results suggest that AMF are not limited by dispersal at the scale of YNP, but that the soil environment appears to be the primary factor affecting community composition and distribution.
DOI: 10.1890/10-1516.1
PubMed: 21797157
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pubmed:21797157Le document en format XML
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Rohr</name></author><author><name sortKey="Redecker, Dirk" sort="Redecker, Dirk" uniqKey="Redecker D" first="Dirk" last="Redecker">Dirk Redecker</name></author><author><name sortKey="Zabinski, Catherine A" sort="Zabinski, Catherine A" uniqKey="Zabinski C" first="Catherine A" last="Zabinski">Catherine A. 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Rohr</name></author><author><name sortKey="Redecker, Dirk" sort="Redecker, Dirk" uniqKey="Redecker D" first="Dirk" last="Redecker">Dirk Redecker</name></author><author><name sortKey="Zabinski, Catherine A" sort="Zabinski, Catherine A" uniqKey="Zabinski C" first="Catherine A" last="Zabinski">Catherine A. 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We investigated the impact of these factors for the community assembly of the root-symbiont arbuscular mycorrhizal fungi (AMF) by sampling roots from geothermal and nonthermal grasslands in Yellowstone National Park (YNP), followed by sequencing and RFLP of AMF ribosomal DNA. With the exception of an apparent generalist RFLP type closely related to Glomus intraradices, a distance-based redundancy analysis indicated that the AMF community composition correlated with soil pH or pH-driven changes in soil chemistry. This was unexpected, given the large differences in soil temperature and plant community composition between the geothermal and nonthermal grasslands. RFLP types were found in either the acidic geothermal grasslands or in the neutral to alkaline grasslands, one of which was geothermal. The direct effect of the soil chemical environment on the distribution of two AMF morphospecies isolated from acidic geothermal grasslands was supported in a controlled greenhouse experiment. Paraglomus occultum and Scutellospora pellucida were more beneficial to plants and formed significantly more spores when grown in acidic than in alkaline soil. Distance among grasslands, used as an estimate of dispersal limitations, was not a significant predictor of AMF community similarity within YNP, and most fungal taxa may be part of a metacommunity. The isolation of several viable AMF taxa from bison feces indicates that wide-ranging bison could be a vector for at least some RFLP types among grasslands within YNP. In support of classical niche theory and the Baas-Becking hypothesis, our results suggest that AMF are not limited by dispersal at the scale of YNP, but that the soil environment appears to be the primary factor affecting community composition and distribution.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21797157</PMID><DateCompleted><Year>2011</Year><Month>08</Month><Day>18</Day></DateCompleted><DateRevised><Year>2019</Year><Month>09</Month><Day>02</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0012-9658</ISSN><JournalIssue CitedMedium="Print"><Volume>92</Volume><Issue>6</Issue><PubDate><Year>2011</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Ecology</Title><ISOAbbreviation>Ecology</ISOAbbreviation></Journal><ArticleTitle>Importance of dispersal and thermal environment for mycorrhizal communities: lessons from Yellowstone National Park.</ArticleTitle><Pagination><MedlinePgn>1292-302</MedlinePgn></Pagination><Abstract><AbstractText>The relative importance of dispersal and niche restrictions remains a controversial topic in community ecology, especially for microorganisms that are often assumed to be ubiquitous. We investigated the impact of these factors for the community assembly of the root-symbiont arbuscular mycorrhizal fungi (AMF) by sampling roots from geothermal and nonthermal grasslands in Yellowstone National Park (YNP), followed by sequencing and RFLP of AMF ribosomal DNA. With the exception of an apparent generalist RFLP type closely related to Glomus intraradices, a distance-based redundancy analysis indicated that the AMF community composition correlated with soil pH or pH-driven changes in soil chemistry. This was unexpected, given the large differences in soil temperature and plant community composition between the geothermal and nonthermal grasslands. RFLP types were found in either the acidic geothermal grasslands or in the neutral to alkaline grasslands, one of which was geothermal. The direct effect of the soil chemical environment on the distribution of two AMF morphospecies isolated from acidic geothermal grasslands was supported in a controlled greenhouse experiment. Paraglomus occultum and Scutellospora pellucida were more beneficial to plants and formed significantly more spores when grown in acidic than in alkaline soil. Distance among grasslands, used as an estimate of dispersal limitations, was not a significant predictor of AMF community similarity within YNP, and most fungal taxa may be part of a metacommunity. The isolation of several viable AMF taxa from bison feces indicates that wide-ranging bison could be a vector for at least some RFLP types among grasslands within YNP. In support of classical niche theory and the Baas-Becking hypothesis, our results suggest that AMF are not limited by dispersal at the scale of YNP, but that the soil environment appears to be the primary factor affecting community composition and distribution.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Lekberg</LastName><ForeName>Ylva</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, Montana 59717, USA. ylva.lekberg@gmail.com</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Meadow</LastName><ForeName>James</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Rohr</LastName><ForeName>Jason R</ForeName><Initials>JR</Initials></Author><Author ValidYN="Y"><LastName>Redecker</LastName><ForeName>Dirk</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Zabinski</LastName><ForeName>Catherine A</ForeName><Initials>CA</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Ecology</MedlineTA><NlmUniqueID>0043541</NlmUniqueID><ISSNLinking>0012-9658</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D016164" MajorTopicYN="N">Bison</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="Y">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D045482" MajorTopicYN="Y">Hot Springs</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006863" MajorTopicYN="N">Hydrogen-Ion Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="Y">Mycorrhizae</DescriptorName><QualifierName UI="Q000145" MajorTopicYN="N">classification</QualifierName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006109" MajorTopicYN="N">Poaceae</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012150" MajorTopicYN="N">Polymorphism, Restriction Fragment Length</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012988" MajorTopicYN="Y">Soil Microbiology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014959" MajorTopicYN="N">Wyoming</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>7</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>7</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>8</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21797157</ArticleId><ArticleId IdType="doi">10.1890/10-1516.1</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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