Organic-Aggregate-Attached Bacteria in Aquatic Ecosystems: Abundance, Diversity, Community Dynamics and Function

Tang, Xiangming; Chao, Jianying; Chen, Dan; Shao, Kwang‐Tsao; Gao, Guang

doi:10.5772/27288

Cited by 2 publications

(3 citation statements)

References 86 publications

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“…In our limnic samples, we did not find elevated levels of PA Planctomycetes as previously reported, e.g. by Allgaier and Grossart () and Tang and colleagues (). For marine macroaggregates collected off the coast of Santa Barbara, DeLong and colleagues () showed a dominance of Bacteroidetes , Planctomycetes or Gammaproteobacteria .…”

Section: Resultssupporting

confidence: 89%

“…Whereas DeLong and colleagues () found by comparative 16S rRNA sequencing that marine particles are dominated by Bacteroidetes , Planctomycetes and Gammaproteobacteria , most of the other available studies (Rath et al ., ; Ploug et al ., ; Simon et al ., ; Bidle and Azam, ; Rink et al ., ) show that solely Bacteroidetes and Gammaproteobacteria are dominant on marine particles. Contrary, limnic particles seem to be dominated by Alphaproteobacteria , Betaproteobacteria , Bacteroidetes (Grossart and Simon, ; Brachvogel et al ., ; Schweitzer et al ., ; Lemarchand et al ., ) and sometimes by Planctomycetes (Tang et al ., ). Studies based on rather low numbers of particles and 16S rRNA sequences suggested a lower diversity of PA bacteria than FL bacteria (Ghiglione et al ., ).…”

Section: Introductionmentioning

confidence: 97%

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Comparison of bacterial communities on limnic versus coastal marine particles reveals profound differences in colonization

Bižić-Ionescu

Zeder

Ionescu

et al. 2014

Environmental Microbiology

134

106

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Marine and limnic particles are hotspots of organic matter mineralization significantly affecting biogeochemical element cycling. Fluorescence in-situ hybridization and pyrosequencing of 16S rRNA genes were combined to investigate bacterial diversity and community composition on limnic and coastal marine particles > 5 and > 10 μm respectively. Limnic particles were more abundant (average: 1 × 10(7) l(-1)), smaller in size (average areas: 471 versus 2050 μm(2)) and more densely colonized (average densities: 7.3 versus 3.6 cells 100 μm(-2)) than marine ones. Limnic particle-associated (PA) bacteria harboured Alphaproteobacteria and Betaproteobacteria, and unlike previously suggested sizeable populations of Gammaproteobacteria, Actinobacteria and Bacteroidetes. Marine particles were colonized by Planctomycetes and Betaproteobacteria additionally to Alphaproteobacteria, Bacteroidetes and Gammaproteobacteria. Large differences in individual particle colonization could be detected. High-throughput sequencing revealed a significant overlap of PA and free-living (FL) bacteria highlighting an underestimated connectivity between both fractions. PA bacteria were in 14/21 cases more diverse than FL bacteria, reflecting a high heterogeneity in the particle microenvironment. We propose that a ratio of Chao 1 indices of PA/FL < 1 indicates the presence of rather homogeneously colonized particles. The identification of different bacterial families enriched on either limnic or marine particles demonstrates that, despite the seemingly similar ecological niches, PA communities of both environments differ substantially.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 97%

Comparison of bacterial communities on limnic versus coastal marine particles reveals profound differences in colonization

Bižić-Ionescu

Zeder

Ionescu

et al. 2014

Environmental Microbiology

134

106

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“…However, the extent to which these processes influence viral encounter rate and host survival in the marine environment remains unknown, as detailed studies using marine phage-bacteria model systems are largely missing. Such information is essential as many marine bacteria are found in filaments or attached to particles (Tang et al, 2012).…”

Section: Host Morphologymentioning

confidence: 99%

Factors affecting virus dynamics and microbial host-virus interactions in marine environments

Mojica

Brussaard

2014

FEMS Microbiol Ecol

223

209

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Marine microorganisms constitute the largest percentage of living biomass and serve as the major driving force behind nutrient and energy cycles. While viruses only comprise a small percentage of this biomass (i.e., 5%), they dominate in numerical abundance and genetic diversity. Through host infection and mortality, viruses affect microbial population dynamics, community composition, genetic evolution, and biogeochemical cycling. However, the field of marine viral ecology is currently limited by a lack of data regarding how different environmental factors regulate virus dynamics and host-virus interactions. The goal of the present minireview was to contribute to the evolution of marine viral ecology, through the assimilation of available data regarding the manner and degree to which environmental factors affect viral decay and infectivity as well as influence latent period and production. Considering the ecological importance of viruses in the marine ecosystem and the increasing pressure from anthropogenic activity and global climate change on marine systems, a synthesis of existing information provides a timely framework for future research initiatives in viral ecology.

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Organic-Aggregate-Attached Bacteria in Aquatic Ecosystems: Abundance, Diversity, Community Dynamics and Function

Cited by 2 publications

References 86 publications

Comparison of bacterial communities on limnic versus coastal marine particles reveals profound differences in colonization

Comparison of bacterial communities on limnic versus coastal marine particles reveals profound differences in colonization

Factors affecting virus dynamics and microbial host-virus interactions in marine environments

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