Rivers and streams.- Filamentous green algae in freshwater streams on Signy Island, Antarctica.- The effects of nutrient limitation and stream discharge on the epilithic microbial community in an oligotrophic Aretic stream.- Microbial communities in southern Victoria Land streams (Antarctica) I. Photosynthesis.- Microbial communities in southern Victoria Land streams (Antarctica) II. The effects of low temperature.- Nitrogen dynamics in two antaretic streams.- Benthic algal biomass and productivity in high subarctic streams, Alaska.- Broadscale patterns in the distribution of aquatic and terrestrial vegetation at three ice-free regions on Ross Island, Antarctica.- Community structure of benthic invertebrates in interior Alaskan (USA) streams and rivers.- Variability of macroinvertebrate community composition in an arctic and subarctic stream.- Geochemical processes in the Lake Fryxell Basin (Victoria Land, Antarctica).- Lakes and ponds.- Some aspects of iron cycling in maritime antarctic lakes.- Nitrogen cycling in Arctic lakes and ponds.- Photon dependence of inorganic nitrogen transport by phytoplankton in perennially ice-covered Antarctic lakes.- Patterns of energy storage in Pseudoboeckella poppei (Crustacea, Copepoda) from two contrasting lakes on Signy Island, Antarctica.- Tundra ponds of the Yukon Delta, Alaska, and their macroinvertebrate communities.- Vertical distributions of a planktonic harpacticoid and a calanoid (Copepoda) in a meromictic Antarctic lake.- Physico-chemical characteristics and origin of hypersaline meromictic Lake Garrow in the Canadian High Arctic.- Meromixis in an Antarctic fjord; a precursor to meromictic lakes on an isostatically rising coastline.- Chemical characteristics of pond waters in the Labyrinth of southern Victoria Land, Antarctica.- Biogeochemical study of organic substances in Antarctic lakes.- Vertical distribution of organic constituents in an Antarctic lake: Lake Fryxell.- Perennially ice-covered Lake Hoare, Antarctica: physical environment, biology, and sedimentation.- Geographical index.- Map index.