Large shifts among eukaryotes, bacteria, and archaea define the vertical organization of a lake sediment

  title={Large shifts among eukaryotes, bacteria, and archaea define the vertical organization of a lake sediment},
  author={Christian Wurzbacher and Andrea Fuchs and Katrin Attermeyer and Katharina Frindte and Hans‐Peter Grossart and Michael Hupfer and Peter Casper and Michael T. Monaghan},
Sediments are depositional areas where particles sink from water columns, but they are also microbial hotspots that play an important role in biogeochemical cycles. Unfortunately, the importance of both processes in structuring microbial community composition has not been assessed. We surveyed all organismic signals of the last ca. 170 years of sediment by metabarcoding, identifying global trends for eukaryotes, bacteria, archaea, and monitored 40 sediment parameters. We linked the microbial… 
1 Citations

Vertical organization of freshwater sediment microbial communities: implications for microbial activities and burial processes

This study uncovered a highly structured microbial community in yet unexplored freshwater sediments, characterized by taxa impoverishment and a dominance of archaea, frequently found in marine systems.



Stratification of Archaea in the Deep Sediments of a Freshwater Meromictic Lake: Vertical Shift from Methanogenic to Uncultured Archaeal Lineages

An integrated molecular approach was performed to gain information on the structure, composition, abundance and vertical stratification of archaeal communities thriving in anoxic freshwater sediments along a gradient of sediments encompassing 130 years of sedimentation.

Distribution of sediment bacterial and archaeal communities in plateau freshwater lakes

Investigation of sediment bacterial and archaeal communities in 13 freshwater lakes on the Yunnan Plateau showed a large variation in bacterial andArchaeal abundances, and Quantitative PCR assay showed high bacterial and Archaeal diversities.

DNA from lake sediments reveals the long-term dynamics and diversity of Synechococcus assemblages

Overall, qPCR and sequencing results showed that environmental changes affected Synechococcus, community dynamics and structure, translating into changes in genotype composition, which illustrated the promising approach that consists in coupling molecular tools and paleolimnology to reconstruct a lake's biodiversity history.

Community structure of Archaea and Bacteria in a profundal lake sediment Lake Kinneret (Israel).

Vertical distribution of structure and function of the methanogenic archaeal community in Lake Dagow sediment.

The vertical distribution of the functional characteristics (CH4 production from acetate versus H2/CO2) was reflected in the structure of the community consisting of acetotrophic (Methanosaetaceae) versus hydrogenotrophic ('real-time' polymerase chain reaction and T-RFLP) phenotypes.

Endospore-forming bacteria as new proxies to assess impact of eutrophication in Lake Geneva (Switzerland–France)

This study shows that the abundance and diversity of endospore-forming bacteria can be used as proxies to reconstruct lake history and introduces a new strategy for paleoecology that could also be applied to ocean sediments and long sediment cores.

Predominant archaea in marine sediments degrade detrital proteins

It is shown that the uncultured miscellaneous crenarchaeotal group (MCG) and marine benthic group-D (MBG-D) are among the most numerous archaea in the marine sub-sea floor and may have a previously undiscovered role in protein remineralization in anoxic marine sediments.

Can marine bacteria be recruited from freshwater sources and the air?

This study shows that the interplay between bacterial dispersal limitation and dispersal from internal and external sources may have an important role for community recovery in response to environmental change.