MARK WILLIAMS RESEARCH ACTIVITY: BIOGEOCHEMISTRY

Research Activities

• Microbial activity under snow
• Collaborative research: Biogeochemical and hydrologic controls on solutes and flowpaths in alpine watersheds

Publications

• Critical loads for nitrogen deposition in the Colorado Front Range, USA, Ecological Applications, 2000, in press. pdf file of manuscript.

• Mcrobial activity under alpine snowpacks, Niwot Ridge, Colorado, Biogeochemistry, V 32, pp 93-113, 1996.

• Mineral nitrogen transformations in and under seasonal snow in a high-elevation catchment, Rocky Mountains, USA, Water Resources Research V 32, pp 3175-3185, 1996.

• Winter production of CO₂ and N₂O from alpine tundra, Oecologia, V110, pp 403-413, 1997.

• Spatial and Temporal Variability of Solute Contributions From Ephemeral Sub-talus Alpine Streams to Alpine Surface Waters in the Colorado Front Range, AGU abstract, 1996.

• BIOGEOMON Conference 1997, Abstract

• Organic and inorganic nitrogen pools in talus soils and water, Green Lakes Valley, Colorado Front Range, Hydrologic Processes, V11, N13, 1997.

• Inorganic N and microbial biomass dynamics before and during spring snowmelt Biogeochemistry, v 43, P 1-15, 1998.

• Potential Influence of Talus Interstitial Ice on Talus Hydrologic Flowpaths and Alpine Surface Water Chemistry , abstract, Seasonally Frozen Soils Symposium, Fairbanks, Alaska, June 10-12, 1997.

• Nitrogen mineralization in alpine talus fields, Green Lakes Valley, Colorado , Arctic and Alpine Research, V 30, N 3, P 266-271, 1998.

• Controls on Dissolved Organic Nitrogen (DON) in the Surface Waters of the Green Lakes Valley, Colorado Front Range, AGU 98 Abstract.

• Flow Routing in Two Watersheds in the Rocky Mountains, Colorado AGU 98 Abstract.

• Selectivity of Chemical Weathering in High Elevation Catchments of the Colorado Front Range AGU 98 Abstract.

• Hydrologic Contributions of Alpine Talus Landforms and Their Significance to Alpine Surface Waters. AGU 98 Abstract.

• Biogeochemical Diversity and Growth of Microbial Communities in Cold, Unvegetated Soils of Rocky Mountain Talus Fields (4000m) AGU 98 Abstract.