Fine-Scale Temporal Dynamics of a Fragmented Lotic Microbial Ecosystem

Or, Amitai; Shtrasler, Lilach; Gophna, Uri

doi:10.1038/srep00207

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…Interplay Among Geochemical Factor, Bacterioplankton Community, and Gut Microbiota Over Shrimp Ontogeny SEM uncovered that rearing water salinity, pH, TP, and DO were the key determinants in driving the succession of bacterioplankton communities (Figure 3), corroborating recent studies obtained in shrimp, crab, and tilapia aquaculture conditions (Giatsis et al, 2015;Yang et al, 2018;Dai et al, 2020;Hou et al, 2020). Water DO, pH, and salinity directly affected the structures of bacterioplankton community (Figure 3), in accordance with the notion that bacterioplankton communities are extremely sensitive to subtle environmental changes (Or et al, 2012;Yang et al, 2018). In aquaculture ecosystem, the level of water phosphorus is usually low, thus bacterioplankton communities often experience P-unsaturation (Duhamel et al, 2021).…”

Section: Succession Pattern Between Bacterioplankton Community and Shrimp Gut Communitysupporting

confidence: 88%

Quantifying the Importance of Abiotic and Biotic Factors Governing the Succession of Gut Microbiota Over Shrimp Ontogeny

Zhang

Zhu²,

Chen

et al. 2021

Front. Microbiol.

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Intensive studies have evaluated abiotic factors in shaping host gut microbiota. In contrast, little is known on how and to what extent abiotic (geochemical variables) and biotic (i.e., surrounding microbes, younger shrimp, and age) factors assemble the gut microbiota over shrimp ontogeny. Considering the functional importance of gut microbiota in improving host fitness, this knowledge is fundamental to sustain a desirable gut microbiota for a healthy aquaculture. Here, we characterized the successional rules of both the shrimp gut and rearing water bacterial communities over the entire shrimp farming. Both the gut and rearing water bacterial communities exhibited the time decay of similarity relationship, with significantly lower temporal turnover rate for the gut microbiota, which were primarily governed by shrimp age (days postlarval inoculation) and water pH. Gut commensals were primary sourced (averaged 60.3%) from their younger host, rather than surrounding bacterioplankton (19.1%). A structural equation model revealed that water salinity, pH, total phosphorus, and dissolve oxygen directly governed bacterioplankton communities but not for the gut microbiota. In addition, shrimp gut microbiota did not simply mirror the rearing bacterioplankton communities. The gut microbiota tended to be governed by variable selection over shrimp ontogeny, while the rearing bacterioplankton community was shaped by homogeneous selection. However, the determinism of rare and stochasticity of abundant subcommunities were consistent between shrimp gut and rearing water. These findings highlight the importance of independently interpreting host-associated and free-living communities, as well as their rare and abundant subcommunities for a comprehensive understanding of the ecological processes that govern microbial successions.

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Section: Succession Pattern Between Bacterioplankton Community and Shrimp Gut Communitysupporting

confidence: 88%

Quantifying the Importance of Abiotic and Biotic Factors Governing the Succession of Gut Microbiota Over Shrimp Ontogeny

Zhang

Zhu²,

Chen

et al. 2021

Front. Microbiol.

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“…Specifically, water column bacteria represent a pool of microbes available to colonize benthic habitats after which local adaptation and patch-scale species sorting can occur; both dispersal and local environmental conditions may influence microbial diversity, and composition albeit at different proportions in different habitat types (Crump et al, 2007 , 2012 ; Besemer et al, 2013 ). For microbes in environments with longer residence times and decreased colonization rates, such as stream bed environments, environmental sorting has a stronger influence on microbial composition (Or et al, 2012 ; Adams et al, 2014 ; Handley et al, 2014 ) except in cases where mass effects are strong and continual (Souffreau et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Watershed Urbanization Linked to Differences in Stream Bacterial Community Composition

et al. 2017

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Urbanization strongly influences headwater stream chemistry and hydrology, but little is known about how these conditions impact bacterial community composition. We predicted that urbanization would impact bacterial community composition, but that stream water column bacterial communities would be most strongly linked to urbanization at a watershed-scale, as measured by impervious cover, while sediment bacterial communities would correlate with environmental conditions at the scale of stream reaches. To test this hypothesis, we determined bacterial community composition in the water column and sediment of headwater streams located across a gradient of watershed impervious cover using high-throughput 16S rRNA gene amplicon sequencing. Alpha diversity metrics did not show a strong response to catchment urbanization, but beta diversity was significantly related to watershed impervious cover with significant differences also found between water column and sediment samples. Samples grouped primarily according to habitat—water column vs. sediment—with a significant response to watershed impervious cover nested within each habitat type. Compositional shifts for communities in urbanized streams indicated an increase in taxa associated with human activity including bacteria from the genus Polynucleobacter, which is widespread, but has been associated with eutrophic conditions in larger water bodies. Another indicator of communities in urbanized streams was an OTU from the genus Gallionella, which is linked to corrosion of water distribution systems. To identify changes in bacterial community interactions, bacterial co-occurrence networks were generated from urban and forested samples. The urbanized co-occurrence network was much smaller and had fewer co-occurrence events per taxon than forested equivalents, indicating a loss of keystone taxa with urbanization. Our results suggest that urbanization has significant impacts on the community composition of headwater streams, and suggest that processes driving these changes in urbanized water column vs. sediment environments are distinct.

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Investigating a lotic microbial community following a severe detergent spill

Gophna

2014

Arch Microbiol

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A large non-ionic detergent spill affected the Yarqon stream, where water sampling was performed prior to the spill as a part of the stream's routine sampling and during and after the event. Following the spill, a large foam layer was observed for about 3-4 days accompanied by death of all fauna in the stream. Despite a large quantity of freshwater that was introduced to the stream as an emergency measure, a drastic decrease in dissolved oxygen was also observed. A rapid reduction in bacterial diversity and richness, as measured by automated ribosomal intergenic spacer analysis, was also evident, as microbial assemblages changes accompanied pollutant exposure. However, this analysis showed that the microbial assemblages of the stream were quick to recover and became similar to pre-spill communities as early as a week after the spill. These findings suggest that bacterial assemblages are much more robust to large anthropogenic disturbances than expected.

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Fine-Scale Temporal Dynamics of a Fragmented Lotic Microbial Ecosystem

Cited by 10 publications

References 31 publications

Quantifying the Importance of Abiotic and Biotic Factors Governing the Succession of Gut Microbiota Over Shrimp Ontogeny

Quantifying the Importance of Abiotic and Biotic Factors Governing the Succession of Gut Microbiota Over Shrimp Ontogeny

Watershed Urbanization Linked to Differences in Stream Bacterial Community Composition

Investigating a lotic microbial community following a severe detergent spill

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