The ice‐cover period in lakes is increasingly recognized for its distinct combination of
physical and biological phenomena and ecological relevance. Knowledge gaps exist where …

Microbes compose most of the biomass on the planet, yet the majority of taxa remain
uncharacterized. These unknown microbes, often referred to as “microbial dark matter,” …

High-latitude environments, such as the Antarctic McMurdo Dry Valley lakes, are subject to
seasonally segregated light–dark cycles, which have important consequences for microbial …

Organohalide-respiring bacteria have key roles in the natural chlorine cycle; however, most
of the current knowledge is based on cultures from contaminated environments. We …

Polar amplification of climate change has the potential to cause large‐scale shifts in the
dissolved oxygen (DO) dynamics of Arctic lakes, with implications for fish survival …

Microorganisms play pivotal roles within aquatic ecosystems, affecting their structure,
functioning and services. However, little is known about the effects of water stratification and …

Marine microbes play essential roles in global energy and nutrient cycles. A primary method
of determining their diversity and distribution is through sequencing of 16S ribosomal RNA …

Permafrost thawing leads to the formation of thermokarst ponds that potentially emit CO2
and CH4 to the atmosphere. In the Nunavik subarctic region (northern Québec, Canada) …

DPANN archaea account for half of the archaeal diversity of the biosphere, but with few
cultivated representatives, their metabolic potential and environmental functions are poorly …

Background Cyanobacteria and eukaryotic phytoplankton produce long-chain alkanes and
generate around 100 times greater quantities of hydrocarbons in the ocean compared to …