KNYGA W.J. O'Brien Toolik Lake

The biogeochemistry and zoogeography of lakes and rivers in arctic Alaska.- Cation export from Alaskan arctic watersheds.- The flux of CO2 and CH4 from lakes and rivers in arctic Alaska.- A silicon budget for an Alaskan arctic lake.- Biogeochemistry of manganese- and iron-rich sediments in Toolik Lake, Alaska.- Nitrogen and phosphorus concentrations and export for the upper Kuparuk River on the North Slope of Alaska in 1980.- Water and sediment export of the upper Kuparuk River drainage of the North Slope of Alaska.- Influences of slimy sculpin (Cottus cognatus) predation on the rocky littoral invertebrate community in an arctic lake.- The influence of light and nutrient addition upon the sediment chemistry of iron in an arctic lake.- Epilithic diatom community response to years of P04 fertilization: Kuparuk River, Alaska (68 N Lat.).- Epilithic chlorophyll a, photosynthesis, and respiration in control and fertilized reaches of a tundra stream.- Community structure and bottom-up regulation of heterotrophic microplankton in arctic LTER lakes.- Control mechanisms of arctic lake ecosystems: a limnocorral experiment.- A comparison of slimy sculpin (Cottus cognatus) populations in arctic lakes with and without piscivorous predators.- Effects of fish predation on larval chironomid (Diptera: Chironomidae) communities in an arctic ecosystem.- Cost of predation avoidance in young-of-year lake trout (Salvelinus namaycush): growth differential in sub-optimal habitats.- Shifts in abundance and growth of slimy sculpin in response to changes in the predator population in an arctic Alaskan lake.- Salmonid diet and the size, distribution, and density of benthic invertebrates in an arctic lake.- Simulation model of the planktivorous feeding of arctic grayling: laboratory and field verification.- The effects of river fertilization on mayfly (Baetis spo) drift patterns and population density in an arctic river.- Black fly (Diptera: Simuliidae) response to phosphorus enrichment of an arctic tundra stream.- Access pipes for sampling through thick ice.