Soil bacterial community composition altered by increased nutrient availability in Arctic tundra soils.
Identifieur interne : 001688 ( Main/Corpus ); précédent : 001687; suivant : 001689Soil bacterial community composition altered by increased nutrient availability in Arctic tundra soils.
Auteurs : Akihiro Koyama ; Matthew D. Wallenstein ; Rodney T. Simpson ; John C. MooreSource :
- Frontiers in microbiology [ 1664-302X ] ; 2014.
Abstract
The pool of soil organic carbon (SOC) in the Arctic is disproportionally large compared to those in other biomes. This large quantity of SOC accumulated over millennia due to slow rates of decomposition relative to net primary productivity. Decomposition is constrained by low temperatures and nutrient concentrations, which limit soil microbial activity. We investigated how nutrients limit bacterial and fungal biomass and community composition in organic and mineral soils within moist acidic tussock tundra ecosystems. We sampled two experimental arrays of moist acidic tussock tundra that included fertilized and non-fertilized control plots. One array included plots that had been fertilized annually since 1989 and the other since 2006. Fertilization significantly altered overall bacterial community composition and reduced evenness, to a greater degree in organic than mineral soils, and in the 1989 compared to the 2006 site. The relative abundance of copiotrophic α-Proteobacteria and β-Proteobacteria was higher in fertilized than control soils, and oligotrophic Acidobacteria were less abundant in fertilized than control soils at the 1989 site. Fungal community composition was less sensitive to increased nutrient availability, and fungal responses to fertilization were not consistent between soil horizons and sites. We detected two ectomycorrhizal genera, Russula and Cortinarius spp., associated with shrubs. Their relative abundance was not affected by fertilization despite increased dominance of their host plants in the fertilized plots. Our results indicate that fertilization, which has been commonly used to simulate warming in Arctic tundra, has limited applicability for investigating fungal dynamics under warming.
DOI: 10.3389/fmicb.2014.00516
PubMed: 25324836
PubMed Central: PMC4183186
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Wallenstein</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Simpson, Rodney T" sort="Simpson, Rodney T" uniqKey="Simpson R" first="Rodney T" last="Simpson">Rodney T. Simpson</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Moore, John C" sort="Moore, John C" uniqKey="Moore J" first="John C" last="Moore">John C. Moore</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2014">2014</date><idno type="RBID">pubmed:25324836</idno><idno type="pmid">25324836</idno><idno type="doi">10.3389/fmicb.2014.00516</idno><idno type="pmc">PMC4183186</idno><idno type="wicri:Area/Main/Corpus">001688</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">001688</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Soil bacterial community composition altered by increased nutrient availability in Arctic tundra soils.</title><author><name sortKey="Koyama, Akihiro" sort="Koyama, Akihiro" uniqKey="Koyama A" first="Akihiro" last="Koyama">Akihiro Koyama</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Biology, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Wallenstein, Matthew D" sort="Wallenstein, Matthew D" uniqKey="Wallenstein M" first="Matthew D" last="Wallenstein">Matthew D. Wallenstein</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Simpson, Rodney T" sort="Simpson, Rodney T" uniqKey="Simpson R" first="Rodney T" last="Simpson">Rodney T. Simpson</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Moore, John C" sort="Moore, John C" uniqKey="Moore J" first="John C" last="Moore">John C. Moore</name><affiliation><nlm:affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Frontiers in microbiology</title><idno type="ISSN">1664-302X</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The pool of soil organic carbon (SOC) in the Arctic is disproportionally large compared to those in other biomes. This large quantity of SOC accumulated over millennia due to slow rates of decomposition relative to net primary productivity. Decomposition is constrained by low temperatures and nutrient concentrations, which limit soil microbial activity. We investigated how nutrients limit bacterial and fungal biomass and community composition in organic and mineral soils within moist acidic tussock tundra ecosystems. We sampled two experimental arrays of moist acidic tussock tundra that included fertilized and non-fertilized control plots. One array included plots that had been fertilized annually since 1989 and the other since 2006. Fertilization significantly altered overall bacterial community composition and reduced evenness, to a greater degree in organic than mineral soils, and in the 1989 compared to the 2006 site. The relative abundance of copiotrophic α-Proteobacteria and β-Proteobacteria was higher in fertilized than control soils, and oligotrophic Acidobacteria were less abundant in fertilized than control soils at the 1989 site. Fungal community composition was less sensitive to increased nutrient availability, and fungal responses to fertilization were not consistent between soil horizons and sites. We detected two ectomycorrhizal genera, Russula and Cortinarius spp., associated with shrubs. Their relative abundance was not affected by fertilization despite increased dominance of their host plants in the fertilized plots. Our results indicate that fertilization, which has been commonly used to simulate warming in Arctic tundra, has limited applicability for investigating fungal dynamics under warming. </div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">25324836</PMID><DateCompleted><Year>2014</Year><Month>10</Month><Day>17</Day></DateCompleted><DateRevised><Year>2020</Year><Month>10</Month><Day>01</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Print">1664-302X</ISSN><JournalIssue CitedMedium="Print"><Volume>5</Volume><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>Frontiers in microbiology</Title><ISOAbbreviation>Front Microbiol</ISOAbbreviation></Journal><ArticleTitle>Soil bacterial community composition altered by increased nutrient availability in Arctic tundra soils.</ArticleTitle><Pagination><MedlinePgn>516</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3389/fmicb.2014.00516</ELocationID><Abstract><AbstractText>The pool of soil organic carbon (SOC) in the Arctic is disproportionally large compared to those in other biomes. This large quantity of SOC accumulated over millennia due to slow rates of decomposition relative to net primary productivity. Decomposition is constrained by low temperatures and nutrient concentrations, which limit soil microbial activity. We investigated how nutrients limit bacterial and fungal biomass and community composition in organic and mineral soils within moist acidic tussock tundra ecosystems. We sampled two experimental arrays of moist acidic tussock tundra that included fertilized and non-fertilized control plots. One array included plots that had been fertilized annually since 1989 and the other since 2006. Fertilization significantly altered overall bacterial community composition and reduced evenness, to a greater degree in organic than mineral soils, and in the 1989 compared to the 2006 site. The relative abundance of copiotrophic α-Proteobacteria and β-Proteobacteria was higher in fertilized than control soils, and oligotrophic Acidobacteria were less abundant in fertilized than control soils at the 1989 site. Fungal community composition was less sensitive to increased nutrient availability, and fungal responses to fertilization were not consistent between soil horizons and sites. We detected two ectomycorrhizal genera, Russula and Cortinarius spp., associated with shrubs. Their relative abundance was not affected by fertilization despite increased dominance of their host plants in the fertilized plots. Our results indicate that fertilization, which has been commonly used to simulate warming in Arctic tundra, has limited applicability for investigating fungal dynamics under warming. </AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Koyama</LastName><ForeName>Akihiro</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Biology, Colorado State University Fort Collins, CO, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wallenstein</LastName><ForeName>Matthew D</ForeName><Initials>MD</Initials><AffiliationInfo><Affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Simpson</LastName><ForeName>Rodney T</ForeName><Initials>RT</Initials><AffiliationInfo><Affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Moore</LastName><ForeName>John C</ForeName><Initials>JC</Initials><AffiliationInfo><Affiliation>Natural Resource Ecology Laboratory, Colorado State University Fort Collins, CO, USA ; Department of Ecosystem Science and Sustainability, Colorado State University Fort Collins, CO, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>10</Month><Day>02</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Front Microbiol</MedlineTA><NlmUniqueID>101548977</NlmUniqueID><ISSNLinking>1664-302X</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Arctic tundra</Keyword><Keyword MajorTopicYN="N">bacteria</Keyword><Keyword MajorTopicYN="N">fertilization</Keyword><Keyword MajorTopicYN="N">fungi</Keyword><Keyword MajorTopicYN="N">mycorrhizae</Keyword><Keyword MajorTopicYN="N">nitrogen</Keyword><Keyword MajorTopicYN="N">phosphorus</Keyword><Keyword MajorTopicYN="N">soil</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>05</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>09</Month><Day>15</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>10</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>10</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate 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