Epiphytic bacterial community composition on two common submerged macrophytes in brackish water and freshwater

Hempel, Melanie; Blume, M. C.; Blindow, Irmgard; Gross, Elisabeth Maria

doi:10.1186/1471-2180-8-58

Cited by 108 publications

(81 citation statements)

References 65 publications

(72 reference statements)

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“…Other investigations on marine snow-attached bacterial communities in the Southern California Bight (Ploug et al 1999), in the polar frontal zone of the Southern Ocean (Simon et al 1999), in Schaproder Bodden (Hempel et al 2008) and in German Wadden Sea (Rink et al 2008) resulted in similar conclusion (Table 3).…”

Section: Sampling Time Clone Library Site Clones Schao1supporting

confidence: 61%

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

Tang¹,

Chao²,

Chen³

et al. 2012

Oceanography

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Section: Sampling Time Clone Library Site Clones Schao1supporting

confidence: 61%

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

Tang¹,

Chao²,

Chen³

et al. 2012

Oceanography

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“…A prevalence of sequences from these two bacterial groups has been reported in a DGGE based study of phytoplankton (Jasti et al, 2005), and on brackish submerged macrophytes (Hempel et al, 2008). In addition to these two groups, Gammaproteobacteria and unaffiliated sequences similar to the candidate bacterial phylum OP11, were identified in this study.…”

Section: ) and Coralsmentioning

confidence: 72%

Variability and abundance of the epiphytic bacterial community associated with a green marine Ulvacean alga

et al. 2009

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Marine Ulvacean algae are colonized by dense microbial communities predicted to have an important role in the development, defense and metabolic activities of the plant. Here we assess the diversity and seasonal dynamics of the bacterial community of the model alga Ulva australis to identify key groups within this epiphytic community. A total of 48 algal samples of U. australis that were collected as 12 individuals at 3 monthly intervals, were processed by applying denaturing gradient gel electrophoresis (DGGE), and three samples from each season were subjected to catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH). CARD-FISH revealed that the epiphytic microbial community was comprised mainly of bacterial cells (90%) and was dominated by the groups Alphaproteobacteria (70%) and Bacteroidetes (13%). A large portion (47%) of sequences from the Alphaproteobacteria fall within the Roseobacter clade throughout the different seasons, and an average relative proportion of 19% was observed using CARD-FISH. DGGE based spatial (between tidal pools) and temporal (between season) comparisons of bacterial community composition demonstrated that variation occurs. Between individuals from both the same and different tidal pools, the variation was highest during winter (30%) and between seasons a 40% variation was observed. The community also includes a sub-population of bacteria that is consistently present. Sequences from excised DGGE bands indicate that members of the Alphaproteobacteria and the Bacteroidetes are part of this stable sub-population, and are likely to have an important role in the function of this marine epiphytic microbial community.

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“…These data provide some evidence that spatial differences in bacterial community composition may be caused by spatial variation in the flow rate of water, which is known to be retarded by the presence of macrophytes in lentic freshwater (Madsen et al, 2001). In addition, however, differences in bacterial community composition could have been directly impacted by plant species abundance and composition, which are known to affect communities of phyllospheredwelling organisms in particular, and correlate with the nutritional qualities of plant exudates (Hempel et al, 2008). We recommend future studies of bacterial community composition in freshwater document macrophyte species density using analogous sampling techniques such that the relative importance of both spatial and physicochemical environmental factors on bacterial community attributes may be compared against local variability in macrophyte community attributes.…”

Section: Discussionmentioning

confidence: 99%

Fine-scale spatial patterns in bacterial community composition and function within freshwater ponds

et al. 2014

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The extent to which non-host-associated bacterial communities exhibit small-scale biogeographic patterns in their distribution remains unclear. Our investigation of biogeography in bacterial community composition and function compared samples collected across a smaller spatial scale than most previous studies conducted in freshwater. Using a grid-based sampling design, we abstracted 100 þ samples located between 3.5 and 60 m apart within each of three alpine ponds. For every sample, variability in bacterial community composition was monitored using a DNAfingerprinting methodology (automated ribosomal intergenic spacer analysis) whereas differences in bacterial community function (that is, carbon substrate utilisation patterns) were recorded from Biolog Ecoplates. The exact spatial position and dominant physicochemical conditions (for example, pH and temperature) were simultaneously recorded for each sample location. We assessed spatial differences in bacterial community composition and function within each pond and found that, on average, community composition or function differed significantly when comparing samples located 420 m apart within any pond. Variance partitioning revealed that purely spatial variation accounted for more of the observed variability in both bacterial community composition and function (range: 24-38% and 17-39%) than the combination of purely environmental variation and spatially structured environmental variation (range: 17-32% and 15-20%). Clear spatial patterns in bacterial community composition, but not function were observed within ponds. We therefore suggest that some of the observed variation in bacterial community composition is functionally 'redundant'. We confirm that distinct bacterial communities are present across unexpectedly small spatial scales suggesting that populations separated by distances of 420 m may be dispersal limited, even within the highly continuous environment of lentic water.

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Epiphytic bacterial community composition on two common submerged macrophytes in brackish water and freshwater

Cited by 108 publications

References 65 publications

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

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

Variability and abundance of the epiphytic bacterial community associated with a green marine Ulvacean alga

Fine-scale spatial patterns in bacterial community composition and function within freshwater ponds

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