The study of ancient sedimentary DNA (sedaDNA) aims to reconstruct the past environments and understand the historical biodiversity in or around aquatic ecosystems. The 18S ribosomal RNA gene (18S rDNA) is usually the target for discerning a broad spectrum of eukaryotic organisms, mainly microbial. Depending on the scientific context, metabarcoding of three hypervariable gene regions (V4, V7, and V9) are the most used alternat...

Winter conditions are rapidly changing in temperate ecosystems, particularly for those that experience periods of snow and ice cover. Relatively little is known of winter ecology in these systems, due to a historical research focus on summer ‘growing seasons’. We executed the first global quantitative synthesis on under‐ice lake ecology, including 36 abiotic and biotic variables from 42 research groups and 101 lakes, examining...

It has recently been shown that a rich community of microorganisms inhabits the slush layers of the winter cover of high mountain lakes. In this study, temporal changes in species assemblages and environmental conditions in the ice and snow cover of Lake Redó in the Pyrenees (Spain) are presented. The winter cover was a highly dynamic environment, in which major changes occurred in physical structure and chemical characteristi...