Spatial patterns and links between microbial community composition and function in cyanobacterial mats

Handle URI:
http://hdl.handle.net/10754/334561
Title:
Spatial patterns and links between microbial community composition and function in cyanobacterial mats
Authors:
Alnajjar, Mohammad Ahmad ( 0000-0003-4861-1604 ) ; Ramette, Alban; Kühl, Michael; Hamza, Waleed; Klatt, Judith M.; Polerecky, Lubos
Abstract:
We imaged reflectance and variable fluorescence in 25 cyanobacterial mats from four distant sites around the globe to assess, at different scales of resolution, spatial variabilities in the physiological parameters characterizing their photosynthetic capacity, including the absorptivity by chlorophyll a (Achl), maximum quantum yield of photosynthesis (Ymax), and light acclimation irradiance (Ik). Generally, these parameters significantly varied within individual mats on a sub-millimeter scale, with about 2-fold higher variability in the vertical than in the horizontal direction. The average vertical profiles of Ymax and Ik decreased with depth in the mat, while Achl exhibited a sub-surface maximum. The within-mat variability was comparable to, but often larger than, the between-sites variability, whereas the within-site variabilities (i.e., between samples from the same site) were generally lowest. When compared based on averaged values of their photosynthetic parameters, mats clustered according to their site of origin. Similar clustering was found when the community composition of the mats' cyanobacterial layers were compared by automated ribosomal intergenic spacer analysis (ARISA), indicating a significant link between the microbial community composition and function. Although this link is likely the result of community adaptation to the prevailing site-specific environmental conditions, our present data is insufficient to identify the main factors determining these patterns. Nevertheless, this study demonstrates that the spatial variability in the photosynthetic capacity and light acclimation of benthic phototrophic microbial communities is at least as large on a sub-millimeter scale as it is on a global scale, and suggests that this pattern of variability scaling is similar for the microbial community composition. © 2014 Al-Najjar, Ramette, Kühl, Hamza, Klatt and Polerecky.
KAUST Department:
Marine Microbial Ecology Research Group; Red Sea Research Center (RSRC)
Citation:
Al-Najjar MAA, Ramette A, Kühl M, Hamza W, Klatt JM, et al. (2014) Spatial patterns and links between microbial community composition and function in cyanobacterial mats. Frontiers in Microbiology 5. doi:10.3389/fmicb.2014.00406.
Publisher:
Frontiers Media SA
Journal:
Frontiers in Microbiology
Issue Date:
6-Aug-2014
DOI:
10.3389/fmicb.2014.00406
PubMed ID:
25147548
PubMed Central ID:
PMC4123731
Type:
Article
ISSN:
1664302X
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAlnajjar, Mohammad Ahmaden
dc.contributor.authorRamette, Albanen
dc.contributor.authorKühl, Michaelen
dc.contributor.authorHamza, Waleeden
dc.contributor.authorKlatt, Judith M.en
dc.contributor.authorPolerecky, Lubosen
dc.date.accessioned2014-11-11T14:29:40Z-
dc.date.available2014-11-11T14:29:40Z-
dc.date.issued2014-08-06en
dc.identifier.citationAl-Najjar MAA, Ramette A, Kühl M, Hamza W, Klatt JM, et al. (2014) Spatial patterns and links between microbial community composition and function in cyanobacterial mats. Frontiers in Microbiology 5. doi:10.3389/fmicb.2014.00406.en
dc.identifier.issn1664302Xen
dc.identifier.pmid25147548en
dc.identifier.doi10.3389/fmicb.2014.00406en
dc.identifier.urihttp://hdl.handle.net/10754/334561en
dc.description.abstractWe imaged reflectance and variable fluorescence in 25 cyanobacterial mats from four distant sites around the globe to assess, at different scales of resolution, spatial variabilities in the physiological parameters characterizing their photosynthetic capacity, including the absorptivity by chlorophyll a (Achl), maximum quantum yield of photosynthesis (Ymax), and light acclimation irradiance (Ik). Generally, these parameters significantly varied within individual mats on a sub-millimeter scale, with about 2-fold higher variability in the vertical than in the horizontal direction. The average vertical profiles of Ymax and Ik decreased with depth in the mat, while Achl exhibited a sub-surface maximum. The within-mat variability was comparable to, but often larger than, the between-sites variability, whereas the within-site variabilities (i.e., between samples from the same site) were generally lowest. When compared based on averaged values of their photosynthetic parameters, mats clustered according to their site of origin. Similar clustering was found when the community composition of the mats' cyanobacterial layers were compared by automated ribosomal intergenic spacer analysis (ARISA), indicating a significant link between the microbial community composition and function. Although this link is likely the result of community adaptation to the prevailing site-specific environmental conditions, our present data is insufficient to identify the main factors determining these patterns. Nevertheless, this study demonstrates that the spatial variability in the photosynthetic capacity and light acclimation of benthic phototrophic microbial communities is at least as large on a sub-millimeter scale as it is on a global scale, and suggests that this pattern of variability scaling is similar for the microbial community composition. © 2014 Al-Najjar, Ramette, Kühl, Hamza, Klatt and Polerecky.en
dc.language.isoenen
dc.publisherFrontiers Media SAen
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.titleSpatial patterns and links between microbial community composition and function in cyanobacterial matsen
dc.typeArticleen
dc.contributor.departmentMarine Microbial Ecology Research Groupen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalFrontiers in Microbiologyen
dc.identifier.pmcidPMC4123731en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionMicrosensor Group, Max-Planck Institute for Marine Microbiology, Bremen, Germanyen
dc.contributor.institutionMicrobial Habitat Group, Max-Planck Institute for Marine Microbiology, Bremen, Germanyen
dc.contributor.institutionMarine Biological Section, Department of Biology, University of Copenhagen, Helsingr, Denmarken
dc.contributor.institutionPlant Functional Biology and Climate Change Cluster, University of Technology Sydney, Sydney, NSW, Australiaen
dc.contributor.institutionBiology Department, UAE University, Al-Ain, United Arab Emiratesen
dc.contributor.institutionDepartment of Earth Sciences - Geochemistry, Utrecht University, Utrecht, Netherlandsen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAlnajjar, Mohammad Ahmaden

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