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The development and analysis of climate datasets for National Park science and management: A guide to methods for making climate records useful and tools to explore critical questions.

Kittel, T., National Park Service, Unpublished Report 2169763


DayCent-Chem simulations of ecological and biogeochemical processes of eight mountain ecosystems in the United States.

Hartman, M.D., Baron, J.S., Clow, D.W., Creed, I.F., Driscoll, C.T., Ewing, H.A., Haines, B.D., Knoepp, J., Lajtha, K., Ojima, D.S., Parton, W.J., Renfro, J., Robinson, R.B., Van Miegroet, H., Weathers, K.C., Williams, M.W., US Geological Survey, Scientific Investigations, Report 2009-5150

Niwot personnel authors: Mark W. Williams


Biological and physical influences on the carbon isotope content of CO2 in a subalpine forest snowpack, Niwot Ridge, Colorado.

Bowling, D.R., Massman, W.J., Schaeffer, S.M., Burns, S.P., Monson, R.K., Williams, M.W., Biogeochemistry 95 (1) :37-59


Storage and release of solutes from a subalpine seasonal snowpack: soil and stream water response, Niwot Ridge, Colorado.

Williams, M.W., Seibold, C., Chowanski, K., Biogeochemistry 95 (1) :77-94


Winter and summer nitrous oxide and nitrogen oxides fluxes from a seasonally snow-covered subalpine meadow at Niwot Ridge, Colorado.

Filippa, G., Freppaz, M., Williams, M.W., Helmig, D., Liptzin, D., Seok, B., Hall, B., Chowanski, K., Biogeochemistry 95 (1) :131-149


Process-level controls on CO2 fluxes from a seasonally snow-covered subalpine meadow soil, Niwot Ridge, Colorado.

Liptzin, D., Williams, M.W., Helmig, D., Seok, B., Filippa, G., Chowanski, K., Hueber, J., Biogeochemistry 95 (1) :151-166


An automated system for continuous measurements of trace gas fluxes through snow: an evaluation of the gas diffusion method at a subalpine forest site, Niwot Ridge, Colorado.

Seok, B., Helmig, D., Williams, M.W., Liptzin, D., Chowanski, K., Hueber, J., Biogeochemistry 95 (1) :95-113


Fluxes and chemistry of nitrogen oxides in the Niwot Ridge, Colorado, snowpack.

Helmig, D., Seok, B., Williams, M.W., Hueber, J., Sanford, R. Jr., Biogeochemistry 95 (1) :115-130


A comparison of water and carbon dioxide exchange at a windy alpine tundra and subalpine forest site near Niwot Ridge, Colorado.

Blanken, P., Williams, M.W., Burns, S.P., Monson, R.K., Knowles, J., Chowanski, K., Ackerman, T., Biogeochemistry 95 (1) :61-76


White on green: under-snow microbial processes and trace gas fluxes through snow, Niwot Ridge, Colorado Front Range.

Williams, M.W., Helmig, D., Blanken, P., Biogeochemistry 95 (1) :1-12


Regional analysis of social-ecological systems.

Bourgeron, P.S., Humphries, H.C., Riboli-Sasco, L., Natures Sciences Societes 17 :185-193

Niwot personnel authors: Patrick S. Bourgeron, Hope C. Humphries


The role of humic acid, silicon, and pH in accrual of periphytic biomass in a subalpine stream, Colorado Front Range.

Toetz, D., Payton, M., Journal of Freshwater Ecology 24 (1) :1-6


Assessment of lake sensitivity to acidic deposition in national parks of the Rocky Mountains.

Nanus, L., Williams, M.W., Campbell, D.H., Tonnessen, K.A., Blett, T., Clow, D.W., Ecological Applications 19 (4) :961-973


Production of microbially-derived fulvic acid from photolysis of quinone-containing extracellular products of phytoplankton.

Miller, M.P., McKnight, D.M., Chapra, S.C., Aquatic Sciences 71 :170-178


Factors controlling streambed coverage of Didymosphenia geminata in two regulated streams in the Colorado Front Range.

Miller, M.P., McKnight, D.M., Cullis, J.D., Greene, A., Vietti, K., Liptzin, D., Hydrobiologia 630 (1) :207-218


Can we measure snow depth with GPS receivers?.

Larson, K.M., Gutmann, E.D., Zavorotny, V.U., Braun, J.J., Williams, M.W., Nievinski, F.G., Geophysical Research Letters 36 :L17502 , DOI: 10.1029/2009GL039430


Negative associations between seedlings and adult plants in two alpine plant communities.

Forbis, T.A., Arctic, Antarctic, and Alpine Research 41 (3) :301-308


Nutrient availability and phytoplankton nutrient limitation across a gradient of atmospheric nitrogen deposition.

Elser, J.J., Kyle, M., Steger, L., Nydick, K.R., Baron, J.S., Ecology 90 (11) :3062-3073


Shifts in lake N:P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition.

Elser, J.J., Andersen,T., Baron, J.S., Bergstrom, A.-K., Jansson, M., Kyle, M., Nydick, K.R., Steger, L., Hessen, D.O., Science 326 :835-837


Microbial activity and diversity during extreme freeze-thaw cycles in periglacial soils, 5400 m elevation, Cordillera Vilcanota, Peru.

Schmidt S.K., Nemergut, D.R., Miller, A.E., Freeman, K.R., King, A.J., Seimon, A., Extremophiles 13 :807-816


Environmental DNA sequencing primers for eutardigrades and bdelloid rotifers.

Robeson, M.S., Costello, E.K., Freeman, K.R., Whiting, J., Adams, B., Martin, A.P., Schmidt, S.K., BMC Ecology , DOI: 10.1186/1472-6785-9-25


Patterns of snow, deposition, and soil nutrients at multiple spatial scales at a Rocky Mountain tree line ecotone.

Liptzin, D., Seastedt, T.R., Journal of Geophysical Research 114 :G04002 , DOI: 10.1029/2009JG000941


Evidence that chytrids dominate fungal communities in high-elevation soils.

Freeman, K.R., Martin, A.P., Karki, D., Lynch, R.C., Mitter, M.S., Meyer, A.F., Longcore, J.E., Simmons, D.R., Schmidt, S.K., Proceedings of the National Academy of Sciences 106 :18315-18320


Exponential growth of "snow molds" at sub-zero temperatures: an explanation for high beneath-snow respiration rates and Q10 values.

Schmidt, S.K., Wilson, K.L., Monson, R.K., Lipson, D.A., Biogeochemistry 95 :13-21


The trade-off between growth rate and yield in microbial communities and the consequences for soil respiration in a high elevation coniferous forest.

Lipson, D.A., Monson, R.K., Schmidt, S.K., Weintraub, M.N., Biogeochemistry 95 :23-35


Controls over ozone deposition to a high elevation subalpine forest.

Turnipseed, A.A., Burns, S.P., Moore, D.J.P., Hu, J., Guenther, A.B., Monson, R.K., Agricultural and Forest Meteorology 149 :1447-1459


A cable-borne tram for atmospheric measurements along transects.

Oncley, S.P., Schwenz, K., Burns, S.P., Sun, J., Monson, R.K., Journal of Atmospheric and Oceanic Technology 26 :462-473


Ecohydrological controls on snowmelt partitioning in mixed-conifer sub-alpine forests.

Molotch, N.P., Brooks, P.D., Burns, S.P., Litvak, M., Monson, R.K., McConnell, J.R., Musselman, K., Ecohydrology 2 :129-142


Longer growing seasons lead to less carbon sequestration by a subalpine forest.

Hu, J., Moore, D.J.P., Burns, S.P., Monson, R.K., Global Change Biology , DOI: 10.1111/j.1365-2486.2009.01967.x


An evaluation of calibration techniques for in situ carbon dioxide measurements using a programmable portable trace-gas measuring system.

Burns, S.P., Delany, A.C., Sun, J., Stephens, B.B., Oncley, S.P., Maclean, G.D., Semmer, S.R., Schroter, J., Ruppert, J., Journal of Atmospheric and Oceanic Technology 26 :291-316


Soil, plant, and transport influences on methane in a subalpine forest under high ultraviolet irradiance.

Bowling, D.R., Miller, J.B., Rhodes, M.E., Burns, S.P., Monson, R.K., Baer, D., Biogeosciences 6 :1311-1324


Release and uptake of volatile inorganic and organic gases through the deep, winter snowpack at Niwot Ridge, Colorado.

Helmig, D., Apel, E.C., Balke, D., Ganzeveld, L., Lefer, B., Swanson, A.L., Biogeochemistry 95 (1) :167-183


Snow cover effects on glacier ice surface temperature.

Maggioni, M., Freppaz, M., Piccini, P., Williams, M.W., Zanini, E., Arctic, Antarctic, and Alpine Research 41 (3) :323-329


Changes in the surface roughness of snow from millimetre to metre scales.

Fassnacht, S.R., Williams, M.W., Corrao, M.V., Ecological Complexity 6 :221-229


A model of degradation and production of three pools of dissolved organic matter in an alpine lake.

Miller, M.P., McKnight, D.M., Chapra, S.C., Williams, M.W., Limnology and Oceanography 54 (6) :2213-2227


Response of the phytoplankton community in an alpine lake to drought conditions: Colorado Rocky Mountain Front Range, U.S.A..

Flanagan, C.M., McKnight, D.M., Liptzin, D., Williams, M.W., Miller, M.P., Arctic, Antarctic, and Alpine Research 41 (2) :191-203


Fine root inputs to soil reduce growth of a neighbouring plant via distinct mechanisms dependent on root carbon chemistry.

Meier, C.L., Keyserling, K., Bowman, W.D., Journal of Ecology 97 (5) :941-949


Soil CO2 flux and photoautotrophic community composition in high-elevation, barren soil.

Freeman, K.R., Pescador, M.Y., Reed, S.C., Costello, E.K., Robeson, M.S., Schmidt, S.K., Environmental Microbiology 11 (3) :674-686

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This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-1637686. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necesarily reflect the views of the National Science Foundation.

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