Changes in Bacterial and Eukaryotic Community Structure after Mass Lysis of Filamentous Cyanobacteria Associated with Viruses

Hannen, Erik J. van; Zwart, G.; Agterveld, Miranda P. van; Gons, Herman J.; Ebert, Jeannine; Laanbroek, Hendrikus J.

doi:10.1128/aem.65.2.795-801.1999

Cited by 277 publications

(126 citation statements)

References 58 publications

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“…Our metagenomic analysis suggests also that Bacteroidetes were associated with the metabolism of cell wall component of both bacteria and microalgae. This finding seems to be in agreement with several reports evidencing a strong relationship between the high abundance of Bacteroidetes and the elimination of cyanobacterial blooms (van Hannen et al, 1999;Rashidan and Bird, 2001).…”

Section: Functional Diversity Of the Bacterial Community In The Lac Dsupporting

confidence: 93%

Metagenomic approach studying the taxonomic and functional diversity of the bacterial community in a mesotrophic lake (Lac du Bourget – France)

Debroas

Humbert

Enault

et al. 2009

Environmental Microbiology

109

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The main goals of this work were to identify the metabolic pathways of the bacterial community in a lacustrine ecosystem and to establish links between taxonomic composition and the relative abundances of these metabolic pathways. For this purpose, we analysed a 16S rRNA gene library obtained by gene amplification together with a sequence library of both insert ends on c. 7700 fosmids. Whatever the library used, Actinobacteria was the most abundant bacterial group, followed by Proteobacteria and Bacteroidetes. Specific aquatic clades such as acI and acIV (Actinobacteria) or LD12 and GOBB-C201 (Alphaproteobacteria) were found in both libraries. From comparative analysis of metagenomic libraries, the metagenome of this lake was characterized by overrepresentation of genes involved in the degradation of xenobiotics mainly associated with Alphaproteobacteria. Actinobacteria were mainly related to metabolic pathways involved in nucleotide metabolism, cofactors, vitamins, energy, replication and repair. Betaproteobacteria appeared to be characterized by the presence of numerous genes implicated in environmental information processing (membrane transport and signal transduction) whereas glycan and carbohydrate metabolism pathways were overrepresented in Bacteroidetes. These results prompted us to propose hypotheses on the ecological role of these bacterial classes in lacustrine ecosystems.

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Section: Functional Diversity Of the Bacterial Community In The Lac Dsupporting

confidence: 93%

Metagenomic approach studying the taxonomic and functional diversity of the bacterial community in a mesotrophic lake (Lac du Bourget – France)

Debroas

Humbert

Enault

et al. 2009

Environmental Microbiology

109

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“…For example, it has recently been shown that competition among toxic versus nontoxic strains is a major determinant of the overall toxicity of Microcystis blooms, and is strongly affected by the length of the spring-summer period and light availability (Kardinaal et al, 2007b). • Studies of viral infections, which may lead to mass lysis of cyanobacteria within a few days (Van Hannen et al, 1999;Hewson et al, 2001;Tucker and Pollard, 2005). This begs the question of whether the viralcyanobacterial interactions depend on temperature, and perhaps could respond strongly to climate change.…”

Section: Towards a Research Agenda For The 21st Centurymentioning

confidence: 99%

Climate change: a catalyst for global expansion of harmful cyanobacterial blooms

Paerl¹,

Huisman²

2009

Environ Microbiol Rep

1,323

808

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Cyanobacteria are the Earth's oldest known oxygen-evolving photosynthetic microorganisms, and they have had major impacts on shaping our current atmosphere and biosphere. Their long evolutionary history has enabled cyanobacteria to develop survival strategies and persist as important primary producers during numerous geochemical and climatic changes that have taken place on Earth during the past 3.5 billion years. Today, some cyanobacterial species form massive surface growths or 'blooms' that produce toxins, cause oxygen depletion and alter food webs, posing a major threat to drinking and irrigation water supplies, fishing and recreational use of surface waters worldwide. These harmful cyanobacteria can take advantage of anthropogenically induced nutrient over-enrichment (eutrophication), and hydrologic modifications (water withdrawal, reservoir construction). Here, we review recent studies revealing that regional and global climatic change may benefit various species of harmful cyanobacteria by increasing their growth rates, dominance, persistence, geographic distributions and activity. Future climatic change scenarios predict rising temperatures, enhanced vertical stratification of aquatic ecosystems, and alterations in seasonal and interannual weather patterns (including droughts, storms, floods); these changes all favour harmful cyanobacterial blooms in eutrophic waters. Therefore, current mitigation and water management strategies, which are largely based on nutrient input and hydrologic controls, must also accommodate the environmental effects of global warming.

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“…Seasonal changes within aquatic bacterial communities are caused by numerous environmental factors, such as phytoplankton succession, protozoan grazing or viral lysis (Hahn and Höfle, 1999;Van Hannen et al, 1999;Brussaard et al, 2005;Newton et al, 2006). For Actinobacteria it has been proposed that phytoplankton-derived DOM (Stepanauskas et al, 2003), pH (Lindström et al, 2005) or grazing (Pernthaler et al, 2001;Jezbera et al, 2005;Newton et al, 2006) are determining factors for community structure.…”

Section: Ecological Potential Of Freshwater Actinobacteria Communitiesmentioning

confidence: 99%

Intra‐ and inter‐lake variability of free‐living and particle‐associated Actinobacteria communities

Allgaier

Brückner

Jaspers³

et al. 2007

Environmental Microbiology

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We have analysed the inter- and intra-lake variability of free-living and particle-associated freshwater Actinobacteria communities in four limnological different lakes of the Mecklenburg Lake District, Northeastern Germany. Denaturing gradient gel electrophoresis (DGGE) specific for Actinobacteria was used to investigate phylogenetic diversity and seasonal dynamics of actinobacterial communities in the epilimnion of all lakes (inter-lake variability) and to assess differences between Actinobacteria communities of the epi-, meta- and hypolimnion of a single lake (intra-lake variability) respectively. DGGE analyses showed significant inter- and intra-lake differences between Actinobacteria communities of all lakes and water layers as well as between free-living and particle-associated Actinobacteria. Phylogenetic inferences of 16S rRNA gene sequences suggest that particular members of particle-associated Actinobacteria were exclusively affiliated to certain actinobacterial lineages. The phylogenetic comparison of 16S rRNA gene sequences of all lakes and water layer, however, indicated the occurrence of almost similar phylogenetic lineages in all studied habitats and suggest high intracluster diversity within already known actinobacterial lineages. Non-metric multidimensional scaling (NMS) ordination analyses and Pearson's product moment correlations revealed several strong correlations between the investigated Actinobacteria communities and various limnological parameters, such as conductivity, total phosphorous, alkalinity or primary production. However, no uniform correlation patterns were found between lakes, water layers and bacterial fractions. These heterogeneous correlation patterns together with the phylogenetic similarities of Actinobacteria communities from different lakes indicate that particular Actinobacteria represent various ecotypes or exhibit a pronounced ecophysiological plasticity.

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Changes in Bacterial and Eukaryotic Community Structure after Mass Lysis of Filamentous Cyanobacteria Associated with Viruses

Cited by 277 publications

References 58 publications

Metagenomic approach studying the taxonomic and functional diversity of the bacterial community in a mesotrophic lake (Lac du Bourget – France)

Metagenomic approach studying the taxonomic and functional diversity of the bacterial community in a mesotrophic lake (Lac du Bourget – France)

Climate change: a catalyst for global expansion of harmful cyanobacterial blooms

Intra‐ and inter‐lake variability of free‐living and particle‐associated Actinobacteria communities

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