Diatom-driven recolonization of microbial mat-dominated siliciclastic tidal flat sediments

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloInstituto de Geología de Costas y del Cuaternario es
cic.versioninfo:eu-repo/semantics/submittedVersiones
dc.date.accessioned2018-06-04T17:05:10Z
dc.date.available2018-06-04T17:05:10Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/8170
dc.titleDiatom-driven recolonization of microbial mat-dominated siliciclastic tidal flat sedimentsen
dc.typeArtículoes
dcterms.abstractModern microbial mats and biofilms play a paramount role in sediment biostabilization. When sporadic storms affect tidal flats of Bahía Blanca Estuary, the underlying siliciclastic sediment is exposed by physical disruption of the mat, and in a few weeks’ lapse, a microbial community re-establishes. With the objective of studying colonization patterns and the ecological succession of microorganisms at the scale of these erosional structures, these were experimentally-made and their biological recolonization followed for 8 wk, with replication in winter and spring. Motile pennate diatoms led the initial colonization following two distinct patterns: a dominance by Cylindrotheca closterium in winter; and by naviculoid and nitzschioid diatoms in spring. During the first 7 d, cell numbers increased 2-17-fold. Cell densities further increased exhibiting sigmoidal community growth, reaching 2.9-8.9 × 106 cells cm-3 maxima around d-30; centric diatoms maintained low densities throughout. In the 56 d after removal of the original mat, filamentous cyanobacteria that dominates mature mats did not establish a significant biomass, leading to the rejection of the hypothesis that cyanobacteria would drive the colonization. The observed dominance of pennate diatoms is attributed to extrinsic factors determined by tidal flooding; and intrinsic ones, e.g. motility, nutrient affinity, and high growth rate.en
dcterms.creator.authorPan, Jerónimoes
dcterms.creator.authorCuadrado, Diana G.es
dcterms.creator.authorBournod, Constanza N.es
dcterms.extent16 p.es
dcterms.identifier.otherdoi:10.1093/femsec/fix111es
dcterms.identifier.urlRecurso onlinees
dcterms.isPartOf.issuevol. 93, no. 10es
dcterms.isPartOf.seriesFEMS Microbiology Ecologyes
dcterms.issued2017-10
dcterms.languageIngléses
dcterms.licenseAttribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0)es
dcterms.publisherOxford University Presses
dcterms.subjectbiological sediment colonizationen
dcterms.subjectdiatomsen
dcterms.subjectecological successionen
dcterms.subjectfilamentous cyanobacteriaen
dcterms.subjectmicrobial matsen
dcterms.subjectmicrophytobenthosen
dcterms.subject.materiaGeologíaes
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