| Dr. Dennis Ojima is currently a Senior Research Scientist at the Natural Resource Ecology Laboratory at the Colorado State University. He received his PhD in 1987 at CSU and worked for three years (1988 through 1990) with the International Geosphere-Biosphere Programme in Stockholm, Sweden. His current research efforts deal with ecosystem dynamics and ecosystem modeling relative to changes in land management, climate change, and atmospheric chemistry changes. He has conducted field research extensively in the US; in particular Colorado, Florida, Kansas, and South Dakota; and has conducted field research in China and Mongolia. Dr. Ojima has been a recognized expert in global change impacts to semiarid and arid ecosystems and has participated in workshops sponsored by the International Geosphere-Biosphere Program, the United Nations Environmental Programme, and Academies of China and Mongolia. He has participated in efforts to develop mitigation strategies for developing countries and worked with the scientists at the Lawerence Berkeley Laboratories in the Countries Studies Programme. He has also worked in Senegal, China, Mongolia and Kazakistan on developing strategies for carbon sequestration. Currently he is involved in studies of global change impacts on terrestrial ecosystems in the US and around the world using an ecosystem model (CENTURY); research efforts to link economic analysis with terrestrial ecosystem dynamics; chairing the steering committee to facilitate research efforts on land use and land cover changes in temperate East Asia; and co-chairing the Land Science Planning effort for the IGBP Phase II. |
| | CASMGS Research
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Publications
 2000. "Dynamic simulation of tree-grass interactions for global change studies.", Ecological Applications V. 10(2) : 449-469.2000. "General model for N2O and N2 gas emissions from soils due to denitrification.", Global Biogeochemical Cycles V. 14 : 10-45-1060.2000. "General CH4 oxidation model and comparisons of CH4 oxidation in natural and managed systems.", Global Biogeochemical Cycles V. 14 : 999-1019.2000. "Evaluating annual nitrous oxide fluxes at the ecosystem scale.", Global Biogeochemical Cycles V. 14 : 1061-1070.2000. "Intra- and interannual variability of ecosystem processes in shortgrass-steppe: new model, verification, simulations.", Journal of Geophysical Research 105 V. (D15) : 20,093-20,1000.2000. "TRAGNET analysis and synthesis of trace gas fluxes.", Global Biogeochemical Cycles, V. 14 : 995-997.2000. "Contribution of increasing CO2 and climate to carbon storage by ecosystems in the United States.", Science V. 287 (5460) : 2004-2006.1999. "Dynamic replacement and loss of soil carbon on eroding cropland.", Global Biogeochemical Cycles V. 13(4) : 885-901.1998. "Controls on annual emissions of nitric oxide from soils of the Colorado shortgrass steppe.", Global Biogeochemical Cycles V. 12 : 81-91.1998. "Effects of land cover, water redistribution, and temperature on ecosystem processes in the South Platte Basin.", Ecological Application V. 8 : 1037-1051.1998. "Comparison of N2O emissions from soils at three temperate agricultural sites: Simulations of year-round measurements by four models.", Nutrient Cycles in Agroecosystems V. 55 : 77-105.1998. "Comparison of N2O emissions from soils at three temperate agricultural sites: Simulations of year-round measurements by four models.", Nutrient Cycles in Agroecosystems V. 55 : 77-105.1998. "Modeled responses of terrestrial ecosystems to elevated atmospheric CO2: A comparison of simulations by the biogeochemistry models of the vegetation/ecosystem modeling and analysis project (VEMAP).", Oecologia V. 114 : 389-404.1998. "DAYCENT and its land surface submodel: description and testing.", Global and Planetary Change V. 19 : 35-48.1997. "Continental scale variability in ecosystem processes: Models, data, and the role of disturbance.", Ecological Monographs V. 67(2) : 251-271.1997. "CH4 and N2O fluxes in the Colorado shortgrass steppe: 2.Long-term impact of land use change.", Global Biogeochemical Cycles V. 11 : 29-42.1997. "CH4 and N2O fluxes in the Colorado shortgrass steppe: 2. Long-term impact of land use change.", Global Biogeochem. Cycles. V. 11 : 29-42.1997. "Testing the CENTURY ecosystem level model on data sets from eight grassland sites in the former USSR representing wide climatic/soil gradient.", Ecological Modelling V. 96 : 191-210.1996. "Interannual variation in the climate and aboveground biomass of Leymus chinense steppe and Stipa grandis steppe in the Xilin River Basin, Inner Mongolia, China.", Journal of Arid Environments V. 31 : 283-299.1996. "CH4 and N2O fluxes in the Colorado shortgrass steppe: I. Impact of landscape and nitrogen addition.", Global Biogeochemical Cycles V. 10 : 387-399.1996. "CH4 and N2O fluxes in the Colorado shortgrass steppe: 1. Impact of landscape and nitrogen addition.", Global Biogeochemical Cycles V. 10(3) : 387-399.1996. "Climate and nitrogen controls on the geography and timescales of terrestrial biogeochemical cycling.", Global Biogeo. Cycles V. 10 : 677-692.1996. "Generalized model for N2 and N2O production from nitrification and denitrification.", Global Biogeochemical Cycles V. 10 : 401-412.1996. "Generalized model for N2 and N2O production from nitrification and denitrification.", Global Biogeochemical Cycles V. 10(3) : 401-412.1996. "Generalized model for N2 and N2O production from nitrification and denitrification.", Global Biogeochemical Cycles V. 10 : 401-412.1996. "Observation and modeling of plant biomass of meadow steppe in Tumugi, Xingan League, Inner Mongolia, China.", Vegetation V. 127 : 191-201.1996. "Temporal variation in aboveground biomass of Leymus chinense steppe from species to community level in the Xilin River Basin, Inner Mongolia, China.", Vegetation V. 123 : 1-12.1996. "Interannual variation in the climate and aboveground biomass of Leymus chinense steppe and Stipa grandis steppe in the Xilin River Basin, Inner Mongolia, China.", Journal of Arid Environments V. 31 : 283-299.1996. "Temporal variation in aboveground biomass of Leymus chinense steppe from species to community level in the Xilin River Basin, Inner Mongolia, China.", Vegetation V. 123 : 1-12.1996. "Observation and modeling of plant biomass of meadow steppe in Tumugi, Xingan League, Inner Mongolia, China.", Vegetation V. 127 : 191-201.1995. "Vegetation/ecosystem modeling and analysis project (VEMAP): assessing biogeography and biogeohemistry models in a regional study of terrestrial ecosystem responses to climate change and CO2 doubling.", Biogeochemical Cycles V. 9 : 407-437.1995. "Vegetation/ecosystem modeling and analysis project (VEMAP): assessing biogeography and biogeochemistry models in a regional study of terrestrial ecosystem responses to climate change and CO2 doubling.", Global Biogeochemical Cycles V. 9 : 407-437.1995. "Vegetation/ecosystem modeling and analysis project (VEMAP): assessing biogeography and biogeochemistry models in a regional study of terrestrial ecosystem responses to climate change and CO2 doubling.", Global Biogeochemical Cycles V. 9 : 407-437.1995. "Sensitivity of Inner Mongolia grasslands to climate change.", Journal of Biogeography V. 22 : 643-648.1995. "Sensitivity of Inner Mongolia grasslands to global climate change.", Journal of Biogeography V. 22 : 643-648.1995. "Sensitivity of Inner Mongolia grasslands to global climate change.", Journal of Biogeography V. 22 : 643-648.1995. "Sensitivity of Inner Mongolia grasslands to climate change.", Journal of Biogeography V. 22 : 643-648.1995. "Impact of Climate-Change on Grassland Production and Soil Carbon Worldwide.", Global Change Biology V. 1(1) : 13-22.1995. "Impact of climate change on grassland production and soil carbon worldwide.", Global Change Biology V. 1 : 13-22.1995. "The VEMAP integrated database for modelling United States ecosystem/vegetation sensitivity to climate change.", Journal of Biogeography V. 22(4-5) : 857-862.1995. "Response of temperate and tropical grasslands to CO2 and climate change.", Journal of Biogeography V. 22 : 537-547.1994. "Analysis of nitrogen saturation potential in Rocky Mountain tundra and forest: Implications for aquatic systems.", Biogeochemistry V. 27 : 61-82.1994. "Short- and long-term effects of fire on N cycling in tallgrass prairie.", Biogeochemistry V. 24 : 67-84.1994. "Long- and short-term effects of fire on N cycling in tallgrass prairie.", Biogeochemistry V. 24 : 67-84.1994. "The global impact of land-use change.", BioScience V. 44(5) : 300-304.1994. "Environmental change in grasslands: assessment using models.", Climatic Change V. 28 : 111-141.1994. "Environmental change in grasslands: assessment using models.", Climatic Change V. 28 : 111-141.1994. "Climatic, edaphic and biotic controls over storage and turnover of carbon in soils.", Global Biogeochemical Cycles V. 8(3) : 279-293.1994. "Climatic, edaphic and biotic controls over storage and turnover of carbon in soils.", Global Biogeochemical Cycles V. 8(3) : 279-293.1994. "Controls of Plant and Soil Carbon in a Semihumid Temperate Grassland.", Ecological Applications V. 4(2) : 344-353.1993. " Workshop Summary Statement-Terrestrial Biospheric Carbon Fluxes-Quantification of Sinks and Sources of CO2.", Water, Air, and Soil Pollution V. 70(1-4) : 3-15.1993. "Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide.", Global Biogeochemical Cycles V. 7(4) : 785-809.1993. "Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide.", Global Biogeochemistry Cycles V. 7:(4) : 785-809.1993. "Effect of land use change on methane oxidation in temperate forest and grassland soils.", Chemosphere V. 26 : 675-685.1993. "Modeling the effects of climatic and CO2 changes on grassland storage of soil C.", Water, Air and Soil Pollution V. 70 : 643-657.1993. "Assessment of C budget for grasslands and drylands of the world.", Water, Air and Soil Pollution V. 70 : 95-109.1993. "Effects of land use change on soil methane oxidation in temperate forest and grassland soils.Chemosphere"1993. "Methane consumption in the Colorado short grass steppe.", Mitteil. Deutschen Bodenkund. Gesellschaft. V. 69 : 219-226.1993. "Analysis of agroecosystem carbon pools.", Water, Air and Soil Pollution, V. 70 : 357-371.1993. "Methane Consumption in the Colorado Short Grass Steppe.", Mitteilungen der Deutchen Bodenkundlichen Gesellschaft V. 69 : 219-226.1992. "Mass loss and nitrogen dynamics of decaying litter of grasslands: The apparent low nitrogen immobilization potential of root detritus.", Can. J. Bot. V. 70 : 384-391.1991. "Hurricane effect on soil organic matter dynamics and forest production in the Luquillo Experimental Forest, Puerto Rico: Results of simulation modeling.", Biotropica V. 23 : 364-372.1991. "Fire and grazing in the tallgrass prairie: contingent effects on nitrogen budgets.", Ecology V. 72 : 1374-1382.1991. "Critical issues for understanding global change effects on terrestrial ecosystems.", Ecological Applications V. 1 : 316-325.1990. "Grassland biogeochemistry: Links to atmospheric processes.", Climatic Change V. 17 : 13-25.1990. "Grassland biogeochemistry: Links to atmospheric processes.", Climatic Change V. 17 : 13-25.1989. "Estimating biogeochemical fluxes across sagebrush-steppe landscapes with thematic mapper imagery.", Remote Sens. Environ. V. 28 : 121-129.1987. "Analysis of factors controlling soil organic levels of grasslands in the Great Plains.", Soil Sci.Soc.Am.J. V. 51 : 1173-1179. |
