The modules address the following topics:
- Richness of habitat types: e.g. lakes, small ponds, streams, lake sediments, and glacial
- Special habitats: Iron, sulfur and high carbonate springs, and meromictic lakes.
- Conditions for life: Seasonal and diurnal rhythms of harsh and variable conditions, low
temperature, freezing and thawing, desiccation, variable water mass flow during snow melt. High PAR and extreme UV-radiation
after snow melt, long dark periods below snow and ice, anaerobiosis under the snow pack.
- Life processes: Adapted for low temperature, low electrolyte,
low nutrient, high radiation conditions.