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Microbial food webs in hypertrophic fishponds: omnivorous ciliate taxa are major protistan bacterivores

Microbial food webs in hypertrophic fishponds: omnivorous ciliate taxa are major protistan bacterivores

22. 11. 2019.

Small bacterivorous protists play a fundamental role in aquatic food webs and their taxonomic classification and ecological traits currently belong to core topics in aquatic microbial ecology. Despite the importance of shallow lakes worldwide, knowledge of microbial components, the base of their food webs, remains scarce. To close this gap, we investigated planktonic microbial food webs, in...

Climate change influences on the dominance hierarchy of crabs

Climate change influences on the dominance hierarchy of crabs

25. 10. 2019.

Climate change is expected to affect the life of many aquatic organisms. While most studies focus on physiological and ecological consequences of the climatic shift, only a few investigates the effects on animal behavior. Ectotherms (animals that cannot regulate their body temperature through endogenous process) probably will have to alter their behaviors to find suitable habitats in changing...

Evolution in action: habitat transition from sediment to the pelagial leads to genome streamlining in Methylophilaceae

Evolution in action: habitat transition from sediment to the pelagial leads to genome streamlining in Methylophilaceae

16. 10. 2019.

Freshwater lakes are numerically dominated by very small microbes that appear perfectly adapted to nutrient poor (oligotrophic) conditions because of efficient resource exploitation in nM concentrations. The genomes of such oligotrophs are characterized by being very small (streamlined, <1.5 Mbp) with highly conserved core genomes and few pseudogenes, high coding densities, reduced numbers...

A fluorescence tracer technique reveals novel energy pathways in aquatic systems

A fluorescence tracer technique reveals novel energy pathways in aquatic systems

30. 9. 2019.

Šimek, K. and Sirová, D. 2019: Fluorescently Labeled Bacteria as a Tracer to Reveal Novel Pathways of Organic Carbon Flow in Aquatic Ecosystems. J. Vis. Exp. (151), e59903, doi:10.3791/59903 Elucidating trophic interactions, such as predation and its effects, is a frequent task for many researchers in ecology. The study of microbial communities has many limitations, and...

Urban algae - citizen's survey

Urban algae - citizen's survey

24. 9. 2019.

New survey on public opinion about urban ponds.

Bark beetle-induced tree dieback affects water quality

Bark beetle-induced tree dieback affects water quality

9. 9. 2019.

The bark beetle-induced tree dieback (2004-2008) in a nitrogen saturated, chronically acidified but recovering catchment of Plešné Lake, Czech Republic, resulted in pronounced changes in water chemistry.

Invasion of European catfish

Invasion of European catfish

8. 8. 2019.

European catfish (Silurus glanis) is probably the only one apex predator that has become to be invasive due to human, is there any possible regulation in non-native areas?

Lux in tenebris lucet: Casting light on Asgardarchaeota metabolism in a sunlit microoxic niche

Lux in tenebris lucet: Casting light on Asgardarchaeota metabolism in a sunlit microoxic niche

17. 4. 2019.

Asgardarchaeota, a phylum-level division within the Archaea domain of life, comprises the closest extant relatives of the eukaryotes (discovered to date). Known only from metagenomics-based reconstructions, the members of this clade are found to harbour the most extensive repertoire of eukaryotic specific genes found in prokaryotes, and are expected to shed light on the elusive...

Newcomers play cryptic: The impacts of invasive species are often difficult to predict

Newcomers play cryptic: The impacts of invasive species are often difficult to predict

24. 1. 2019.

New Zealand and other islands have experienced invasions of rats and other species, Europe has seen the arrival of diseases such as the crayfish plague: invasive species can put native animal and plant species on the brink of extinction. They often go undetected for a long time, or their damaging impacts are not immediately clear. This phenomenon – referred to as crypticity – represents a huge...

Niche-directed evolution modulates genome architecture in freshwater Planctomycetes

Niche-directed evolution modulates genome architecture in freshwater Planctomycetes

23. 1. 2019.

Large numbers of bacteria live in freshwater lakes and reservoirs. The microbial universe of these ecosystems is largely unexplored due to our current inability to grow these tiny lifeforms under laboratory conditions. A joint research team from the Department of Aquatic Microbial Ecology (Institute of Hydrobiology, BC, CAS) recently discovered new groups of bacteria thriving in aquatic...

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