Active flagellates grazing on prokaryotes in high salinity waters of a solar saltern

Park, Jong Soo; Kim, Heejung; Choi, Dong Han; Cho, Byung C.

doi:10.3354/ame033173

Cited by 44 publications

(31 citation statements)

References 28 publications

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“…Although the diverse and dynamic viral assemblages of Lake Tyrrell have been well characterized (Emerson et al, , 2013a, metagenomic data do not indicate the occurrence of diel viral blooms over the time period studied here. Heterotrophic nanoflagellates can have significant impacts on microbial community turnover in hypersaline environments (Park et al, 2003). A few microbial eukaryotes have been described in Lake Tyrrell.…”

Section: Discussionmentioning

confidence: 99%

Metagenomic and lipid analyses reveal a diel cycle in a hypersaline microbial ecosystem

et al. 2015

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Marine microbial communities experience daily fluctuations in light and temperature that can have important ramifications for carbon and nutrient cycling. Elucidation of such short time scale community-wide dynamics is hindered by system complexity. Hypersaline aquatic environments have lower species richness than marine environments and can be well-defined spatially, hence they provide a model system for diel cycle analysis. We conducted a 3-day time series experiment in a well-defined pool in hypersaline Lake Tyrrell, Australia. Microbial communities were tracked by combining cultivation-independent lipidomic, metagenomic and microscopy methods. The ratio of total bacterial to archaeal core lipids in the planktonic community increased by up to 58% during daylight hours and decreased by up to 32% overnight. However, total organism abundances remained relatively consistent over 3 days. Metagenomic analysis of the planktonic community composition, resolved at the genome level, showed dominance by Haloquadratum species and six uncultured members of the Halobacteriaceae. The post 0.8 μm filtrate contained six different nanohaloarchaeal types, three of which have not been identified previously, and cryo-transmission electron microscopy imaging confirmed the presence of small cells. Notably, these nano-sized archaea showed a strong diel cycle, with a pronounced increase in relative abundance over the night periods. We detected no eukaryotic algae or other photosynthetic primary producers, suggesting that carbon resources may derive from patchily distributed microbial mats at the sediment-water interface or from surrounding land. Results show the operation of a strong community-level diel cycle, probably driven by interconnected temperature, light abundance, dissolved oxygen concentration and nutrient flux effects.

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Section: Discussionmentioning

confidence: 99%

Metagenomic and lipid analyses reveal a diel cycle in a hypersaline microbial ecosystem

et al. 2015

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“…In addition, by controlling the diversity and abundance of protozoan bacterivores and VLP, salinity could exert control on top-down processes including grazing and viral lysis, which are known to play an important role in structuring bacterioplankton communities (Fuhrman 1999, Pedrós-Alió et al 2000b). In particular, the recent finding of large numbers of heterotrophic nanoflagellates actively grazing on prokaryotes in Korean salterns up to the highest salinities (Park et al 2003, Choi & Cho 2005 underlines the necessity to investigate the role of bacterivory in regulating the community structure of prokaryotes along this salinity gradient.…”

Section: Effect Of Salinity On Bacterial Assemblagesmentioning

confidence: 99%

Distribution of heterotrophic bacteria and virus-like particles along a salinity gradient in a hypersaline coastal lagoon

Schapira¹,

Buscot²,

Leterme³

et al. 2009

Aquat. Microb. Ecol.

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“…Recently Somogyi et al (2014) studied eight lakes of the same Salt Region in Transylvania, where our studied salt lakes are also located, and found that heterotrophic nanoflagellates, the main grazers of picocyanobacteria and picoeukaryotic algae, were completely absent there contrary to some other hypersaline habitats (e.g. Park et al 2003). On the other hand, brine shrimp (Artemia sp.)…”

Section: Albidiferax Ferrireducens and Polaromonas Glacialis (Betapromentioning

confidence: 99%

Winter Planktonic Microbial Communities in Highland Aquatic Habitats

Felföldi

Selvarajan

Somogyi

et al. 2016

Geomicrobiology Journal

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+36-1-381-2178 2 KEY WORDS: peat bog lake, saline lake, crater lake, sulphuric bubbling pool, winter plankton RUNNING TITLE: Winter plankton of highland aquatic habitats 3 AbstractWinter conditions in aquatic habitats of the temperate zone markedly differ from those present in warmer seasons, nevertheless, relatively scarce information is available on planktonic microbial composition, as sites are not easily accessible and it was supposed traditionally that microbial activity is low during this cold period. Since microorganisms could have great impact on the ecosystem even during winter, we explored various sites in the Eastern Carpathians regarding the abundance and taxonomic composition of planktonic microorganisms. Although many of the studied environments were extreme habitats, planktonic microbial communities were abundant and mostly diverse with the presence of previously unidentified taxa.4

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Active flagellates grazing on prokaryotes in high salinity waters of a solar saltern

Cited by 44 publications

References 28 publications

Metagenomic and lipid analyses reveal a diel cycle in a hypersaline microbial ecosystem

Metagenomic and lipid analyses reveal a diel cycle in a hypersaline microbial ecosystem

Distribution of heterotrophic bacteria and virus-like particles along a salinity gradient in a hypersaline coastal lagoon

Winter Planktonic Microbial Communities in Highland Aquatic Habitats

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