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Host-specificity and dynamics in bacterial communities associated with Bloom-forming freshwater phytoplankton.

ABSTRACT: Many freshwater phytoplankton species have the potential to form transient nuisance blooms that affect water quality and other aquatic biota. Heterotrophic bacteria can influence such blooms via nutrient regeneration but also via antagonism and other biotic interactions. We studied the composition of bacterial communities associated with three bloom-forming freshwater phytoplankton species, the diatom Aulacoseira granulata and the cyanobacteria Microcystis aeruginosa and Cylindrospermopsis raciborskii. Experimental cultures incubated with and without lake bacteria were sampled in three different growth phases and bacterial community composition was assessed by 454-Pyrosequencing of 16S rRNA gene amplicons. Betaproteobacteria were dominant in all cultures inoculated with lake bacteria, but decreased during the experiment. In contrast, Alphaproteobacteria, which made up the second most abundant class of bacteria, increased overall during the course of the experiment. Other bacterial classes responded in contrasting ways to the experimental incubations causing significantly different bacterial communities to develop in response to host phytoplankton species, growth phase and between attached and free-living fractions. Differences in bacterial community composition between cyanobacteria and diatom cultures were greater than between the two cyanobacteria. Despite the significance, major differences between phytoplankton cultures were in the proportion of the OTUs rather than in the absence or presence of specific taxa. Different phytoplankton species favoring different bacterial communities may have important consequences for the fate of organic matter in systems where these bloom forming species occur. The dynamics and development of transient blooms may also be affected as bacterial communities seem to influence phytoplankton species growth in contrasting ways.

SUBMITTER: Bagatini IL

PROVIDER: S-EPMC3896425 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Host-specificity and dynamics in bacterial communities associated with Bloom-forming freshwater phytoplankton.

Bagatini Inessa Lacativa IL Eiler Alexander A Bertilsson Stefan S Klaveness Dag D Tessarolli Letícia Piton LP Vieira Armando Augusto Henriques AA

PloS one 20140120 1

Many freshwater phytoplankton species have the potential to form transient nuisance blooms that affect water quality and other aquatic biota. Heterotrophic bacteria can influence such blooms via nutrient regeneration but also via antagonism and other biotic interactions. We studied the composition of bacterial communities associated with three bloom-forming freshwater phytoplankton species, the diatom Aulacoseira granulata and the cyanobacteria Microcystis aeruginosa and Cylindrospermopsis racib ...[more]

PMID: 24465807

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Dataset Information

Host-specificity and dynamics in bacterial communities associated with Bloom-forming freshwater phytoplankton.

Publications

Host-specificity and dynamics in bacterial communities associated with Bloom-forming freshwater phytoplankton.

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