Bacterioplankton diversity and community composition in the Southern Lagoon of Venice

Simonato, Francesca; Gómez-Pereira, Paola R.; Fuchs, Bernhard M.; Amann, Rudolf

doi:10.1016/j.syapm.2009.12.006

Cited by 32 publications

(29 citation statements)

References 59 publications

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“…Previous studies also reported local peaks in gammaproteobacterial abundance in estuarine environments (Bouvier & del Giorgio 2002, Zhang et al 2006. Such high abundances of Gammaproteobacteria, as found in our marine Stn S9, have been previously reported for coastal environments like the Mediterranean Sea (Alonso-Sáez et al 2007) and the Lagoon of Venice (Simonato et al 2010), and also in the North Atlantic ocean (Schattenhofer et al 2009). Bouvier & del Giorgio (2002) associated local spikes of gammaproteobacterial abundances at the Choptank estuary to point sources of nutrients probably derived from wastewater treatment facilities.…”

Section: Factors Influencing Bacterial Groups Abundancesupporting

confidence: 89%

Multilevel analysis of the bacterial diversity along the environmental gradient Río de la Plata–South Atlantic Ocean

Alonso¹,

Gómez-Pereira²,

Ramette³

et al. 2010

Aquat. Microb. Ecol.

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The Río de la Plata is the world's largest estuary, draining the second largest basin of South America. In spite of its key significance at the local and global scale, this is the first attempt made so far to characterize the bacterial diversity of this system. We employed a suite of molecular methods to analyze the bacterial diversity at different phylogenetic levels, both in terms of richness and evenness, and we related these findings to physicochemical parameters. A clear environmental gradient was observed with 3 distinctive zones (riverine, frontal, and marine). In turn, the bacterial communities appeared highly diverse and strongly structured by the environment. A high number (324) of different operational taxonomic units (OTUs) were identified by automated ribosomal intergenic spacer analysis (ARISA). The ARISA results suggested that the composition of bacterioplankton communities was strongly related to physicochemical water characteristics, and that the bacterioplankton had little overlap with the bacterial assemblage of the sediments. Catalyzed reporter deposition-fluorescence in situ hybridization (CARD-FISH) indicated that Betaproteobacteria and Actinobacteria were more abundant in the riverine zone, whereas Gammaproteobacteria and Planctomycetes preferred the marine waters. The relative abundance of Bacteroidetes peaked in the frontal zone, and Alphaproteobacteria were numerically dominant throughout the estuary. The analysis of about 300 almost full-length 16S rRNA gene sequences pointed to the existence of ubiquitous phylotypes, but also suggested habitat preferences among certain groups. This first look into the bacterial community of the Río de la Plata demonstrated marked diversity patterns, providing further insights into the ecology of globally distributed groups of aquatic bacteria.

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Section: Factors Influencing Bacterial Groups Abundancesupporting

confidence: 89%

Multilevel analysis of the bacterial diversity along the environmental gradient Río de la Plata–South Atlantic Ocean

Alonso¹,

Gómez-Pereira²,

Ramette³

et al. 2010

Aquat. Microb. Ecol.

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“…This implies that pronounced population dynamics may be a characteristic feature of this bacterial group, at least in lakes that undergo seasonal change in stratification patterns, water chemistry, and other potentially structuring environmental factors. Strong temporal dynamics have also been reported for SAR11 in marine systems, which seem to be coupled to the seasonality of physicochemical features in these environments (Morris & Vergin 2005, Campbell et al 2009, Carlson et al 2009, Eiler et al 2009, Simonato et al 2010. Moreover, LD12 in Lake Erken feature a minor but significant habitat preference for the photic zone (Fig.…”

Section: Discussionmentioning

confidence: 57%

Seasonality and environmental control of freshwater SAR11 (LD12) in a temperate lake (Lake Erken, Sweden)

Heinrich¹,

Eiler²,

Bertilsson³

2013

Aquat. Microb. Ecol.

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THE SAR11 clade is ubiquitous and abundant in planktonic environments. In freshwater lakes, the clade is represented by tribe LD12 which is phylogenetically distinct from the marine SAR11. We studied the ecology of LD12 in a temperate dimictic lake (Lake Erken, Sweden), by analyzing its seasonal dynamics with quantitative PCR, CARD-FISH and 454 pyrosequencing of the 16S rRNA gene. Results showed that LD12 can be as numerous in freshwater bacterioplankton as their marine SAR11 siblings. They exhibited strong seasonality and made up from 1.8 to 40% of the total bacterial 16S rRNA pool (mean 14%) with pronounced peaks in summer and late fall. Except in spring, LD12 was the dominant Alphaproteobacteria, contributing on average 72% of the 16S rRNA within this class. The LD12 population was dominated by a single persistent ribotype, suggesting low local divergence, at least at the phylogenetic resolution accessed with rRNA genes. The relative abundance of LD12 was positively correlated to nutrient concentrations (phosphate, ammonia, nitrate, and silica) and water transparency whereas the relative abundance was lower during periods characterized by high phytoplankton biomass. Based on these observations we propose that LD12 are poor competitors during periods of high phytoplankton productivity and associated release of labile organic compounds, but thrive when availability of inorganic nutrients is high. Similar to the marine SAR11 sibling group, local LD12 populations appear to respond in contrasting ways to nutrient availability in different lakes, pointing to either ecological divergence within the tribe or variations in the interplay between environmental driver variables.

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“…The structure of the bacterioplankton community within coastal bays has been widely studied. Several studies have revealed interesting attributes of the bacterial assemblages in these habitats, such as seasonality (42), occasional blooms of certain phylotypes (43), decreased diversity in heavily polluted sites (44), or increased diversity as a result of mixing of marine and freshwater phylotypes in cases of freshwater input (45,46).…”

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confidence: 99%

The Pattern of Change in the Abundances of Specific Bacterioplankton Groups Is Consistent across Different Nutrient-Enriched Habitats in Crete

Fodelianakis

Papageorgiou

Pitta

et al. 2014

Appl Environ Microbiol

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A common source of disturbance for coastal aquatic habitats is nutrient enrichment through anthropogenic activities. Although the water column bacterioplankton communities in these environments have been characterized in some cases, changes in ␣-diversity and/or the abundances of specific taxonomic groups across enriched habitats remain unclear. Here, we investigated the bacterial community changes at three different nutrient-enriched and adjacent undisturbed habitats along the north coast of Crete, Greece: a fish farm, a closed bay within a town with low water renewal rates, and a city port where the level of nutrient enrichment and the trophic status of the habitat were different. Even though changes in ␣-diversity were different at each site, we observed across the sites a common change pattern accounting for most of the community variation for five of the most abundant bacterial groups: a decrease in the abundance of the Pelagibacteraceae and SAR86 and an increase in the abundance of the Alteromonadaceae, Rhodobacteraceae, and Cryomorphaceae in the impacted sites. The abundances of the groups that increased and decreased in the impacted sites were significantly correlated (positively and negatively, respectively) with the total heterotrophic bacterial counts and the concentrations of dissolved organic carbon and/or dissolved nitrogen and chlorophyll ␣, indicating that the common change pattern was associated with nutrient enrichment. Our results provide an in situ indication concerning the association of specific bacterioplankton groups with nutrient enrichment. These groups could potentially be used as indicators for nutrient enrichment if the pattern is confirmed over a broader spatial and temporal scale by future studies.

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Bacterioplankton diversity and community composition in the Southern Lagoon of Venice

Cited by 32 publications

References 59 publications

Multilevel analysis of the bacterial diversity along the environmental gradient Río de la Plata–South Atlantic Ocean

Multilevel analysis of the bacterial diversity along the environmental gradient Río de la Plata–South Atlantic Ocean

Seasonality and environmental control of freshwater SAR11 (LD12) in a temperate lake (Lake Erken, Sweden)

The Pattern of Change in the Abundances of Specific Bacterioplankton Groups Is Consistent across Different Nutrient-Enriched Habitats in Crete

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