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Article: Stochastic and deterministic processes interact in the assembly of desert microbial communities on a global scale

TitleStochastic and deterministic processes interact in the assembly of desert microbial communities on a global scale
Authors
Issue Date2011
Citation
Isme Journal, 2011, v. 5 n. 9, p. 1406-1413 How to Cite?
AbstractExtreme arid regions in the worlds' major deserts are typified by quartz pavement terrain. Cryptic hypolithic communities colonize the ventral surface of quartz rocks and this habitat is characterized by a relative lack of environmental and trophic complexity. Combined with readily identifiable major environmental stressors this provides a tractable model system for determining the relative role of stochastic and deterministic drivers in community assembly. Through analyzing an original, worldwide data set of 16S rRNA-gene defined bacterial communities from the most extreme deserts on the Earth, we show that functional assemblages within the communities were subject to different assembly influences. Null models applied to the photosynthetic assemblage revealed that stochastic processes exerted most effect on the assemblage, although the level of community dissimilarity varied between continents in a manner not always consistent with neutral models. The heterotrophic assemblages displayed signatures of niche processes across four continents, whereas in other cases they conformed to neutral predictions. Importantly, for continents where neutrality was either rejected or accepted, assembly drivers differed between the two functional groups. This study demonstrates that multi-trophic microbial systems may not be fully described by a single set of niche or neutral assembly rules and that stochasticity is likely a major determinant of such systems, with significant variation in the influence of these determinants on a global scale. © 2011 International Society for Microbial Ecology All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/179251
ISSN
2015 Impact Factor: 9.328
2015 SCImago Journal Rankings: 6.178
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCaruso, Ten_US
dc.contributor.authorChan, Yen_US
dc.contributor.authorLacap, DCen_US
dc.contributor.authorLau, MCYen_US
dc.contributor.authorMckay, CPen_US
dc.contributor.authorPointing, SBen_US
dc.date.accessioned2012-12-19T09:53:23Z-
dc.date.available2012-12-19T09:53:23Z-
dc.date.issued2011en_US
dc.identifier.citationIsme Journal, 2011, v. 5 n. 9, p. 1406-1413en_US
dc.identifier.issn1751-7362en_US
dc.identifier.urihttp://hdl.handle.net/10722/179251-
dc.description.abstractExtreme arid regions in the worlds' major deserts are typified by quartz pavement terrain. Cryptic hypolithic communities colonize the ventral surface of quartz rocks and this habitat is characterized by a relative lack of environmental and trophic complexity. Combined with readily identifiable major environmental stressors this provides a tractable model system for determining the relative role of stochastic and deterministic drivers in community assembly. Through analyzing an original, worldwide data set of 16S rRNA-gene defined bacterial communities from the most extreme deserts on the Earth, we show that functional assemblages within the communities were subject to different assembly influences. Null models applied to the photosynthetic assemblage revealed that stochastic processes exerted most effect on the assemblage, although the level of community dissimilarity varied between continents in a manner not always consistent with neutral models. The heterotrophic assemblages displayed signatures of niche processes across four continents, whereas in other cases they conformed to neutral predictions. Importantly, for continents where neutrality was either rejected or accepted, assembly drivers differed between the two functional groups. This study demonstrates that multi-trophic microbial systems may not be fully described by a single set of niche or neutral assembly rules and that stochasticity is likely a major determinant of such systems, with significant variation in the influence of these determinants on a global scale. © 2011 International Society for Microbial Ecology All rights reserved.en_US
dc.languageengen_US
dc.relation.ispartofISME Journalen_US
dc.subject.meshBacteria - Classification - Genetics - Isolation & Purificationen_US
dc.subject.meshCyanobacteria - Isolation & Purificationen_US
dc.subject.meshDesert Climateen_US
dc.subject.meshEcosystemen_US
dc.subject.meshModels, Biologicalen_US
dc.subject.meshPhylogenyen_US
dc.subject.meshQuartzen_US
dc.subject.meshSoil Microbiologyen_US
dc.subject.meshStochastic Processesen_US
dc.titleStochastic and deterministic processes interact in the assembly of desert microbial communities on a global scaleen_US
dc.typeArticleen_US
dc.identifier.emailLau, MCY: maglau@princeton.eduen_US
dc.identifier.emailPointing, SB: pointing@hkucc.hku.hken_US
dc.identifier.authorityLau, MCY=rp00721en_US
dc.identifier.authorityPointing, SB=rp00771en_US
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.doi10.1038/ismej.2011.21en_US
dc.identifier.pmid21368908-
dc.identifier.scopuseid_2-s2.0-80052044392en_US
dc.identifier.hkuros218933-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052044392&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume5en_US
dc.identifier.issue9en_US
dc.identifier.spage1406en_US
dc.identifier.epage1413en_US
dc.identifier.isiWOS:000295782900002-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridCaruso, T=7003382204en_US
dc.identifier.scopusauthoridChan, Y=35725244600en_US
dc.identifier.scopusauthoridLacap, DC=9640383000en_US
dc.identifier.scopusauthoridLau, MCY=35177794300en_US
dc.identifier.scopusauthoridMcKay, CP=7101952183en_US
dc.identifier.scopusauthoridPointing, SB=6603986412en_US
dc.identifier.citeulike10280312-

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