academics

Dr. Larry L Tieszen

Professor Emeritus
Biology Department
Augustana College
2001 S. Summit Ave.
Sioux Falls, SD 57197
605.332.2399
llt@sio.midco.net

 

 

Research in Biology and at Eros

Larry L Tieszen (Professor Emeritus) taught Environmental Physiology and Plant Physiology in addition to core courses.  His teaching passion involved student participation in basic research. In addition, he led Ecology of East Africa and Asia courses during the January Terms.  He led numerous NSF-funded Undergraduate Research Projects and conducted research with undergraduates which provided significant insight, contributions, and publications in three areas:  1) Grasses and the Significance of C3 and C4 Photosynthesis, 2) Carbon Isotope Fractionation and Dietary Tracing in humans and wild animals, and 3) the Integration of Photosynthesis, Remote Sensing, and Modeling to quantify carbon fluxes under climate change and land use.  Although this work emphasized grasses and grasslands, it was truly international with student participants in the field.  These advances and the international emphasis resulted in his continuation with this work at EROS for 12 years, as he integrated these specialties with the department.

Larry L. Tieszen (Emeritus Scientist, USGS-EROS) managed Land Cover Applications and Global Change at the USGS-EROS.  He created and managed projects developing mitigation and adaptation related to climate change and which integrate satellite remote sensing (archival and real time), spatially explicit but large area carbon biogeochemical modeling, data assimilation techniques, and geographic information systems. Following contributions to C3 and C4 photosynthesis and pioneering stable isotopic tracing of carbon; his group now is actively involved in the Yukon River Basin; Carbon assessments and sequestration for the U.S.; and land cover change and carbon management in Africa, the Caribbean, and South America. Current work assesses the carbon status of ecosystems in Africa and the “Life Cycle Analyses” and evaluations of Net Ecosystem Exchange (NEE or NEP) at resolutions of 250m to 30m. Research and development at the USGS-EROS have been funded by the USAID, International Development Banks, other international organizations, and US agencies. 

 

Education

B.A., Augustana College, 1961
Ph.D., Univ. of Colorado, 1965

 

Research

Dr. Tieszen's research has focused on the physiological ecology of grasses with an emphasis on photosynthesis and production of C3 and C4 grasses. This led to significant involvement in major ecosystem level studies in grassland systems ranging from tundra regions to temperate zone prairies to the tropics. The ability to distinguish and quantify carbon from these two photosynthetic systems became apparent in 1975 and led to the development of the Isotope Ratio Mass Spectrometry laboratory. This was one of the first major IRMS labs in biology departments and was largely the product of students and the leadership provided by Mike Chapman. 

Student research focused on the use of isotopic fractionation to quantify carbon fluxes and to: 1.) evaluate the control of C3 and C4 production by climate and their responses to climate change, 2.) examine the effects of land use on soil carbon, 3.) evaluate diets and subsistence strategies of ancient people and modern animals, 4.) incorporate remote sensing as a tool to integrate grassland performance over large spatial scales. Support was provided by the Department of Energy (NIGEC), The Nature Conservancy, the USDA, and the NSF. We were selected as a NASA Space Grant Institution and provided two student internships for work with remote sensing at the EROS where the Land Cover Applications and Global Change project was developed .  http://lca.usgs.gov/lca/index.php .

 

Projects

 

1. Remotely sensed data are used to classify the land cover of the Great Plains at a resolution of 1 km and to evaluate the performance of grassland land cover classes. This allows us to document the effect of man on changing land cover of the grassland and to evaluate how carbon uptake by grassland classes (reasonably natural ecosystems) compares to intensively managed agriculture classes. An electronic poster was constructed for display the the 13th Pecora Meetings hosted by the EROS Data Center in August of 1996.

 

More detailed data are being used to study the way in which bison and fire determine landscape patterns on the major grassland preserves of The Nature Conservancy.


2. The soil organic matter retains an isotopic record of past and current vegetation thereby allowing us to reconstruct C3and C4composition and to assess its response to climate change. We have sampled more than 75 sites across N.A. and have determined the control of proportional production by C3 and C4 species from the isotopic composition. C4 percent of total grass production is estimated by the following equation:

delta13C = -136.2 + (low temp April)*(1.033) + precip/July*8.493 + HighT/GS3*5.228 + percent Sand*(.217)

With long-term climate data for the Great Plains we can describe the modern distribution of C4 production and its theoretical response to a 2XCO2 GCM simulation.


Students can also examine the STATSGO soil data base now available at the EROS Data Center where we have identified the C3 and C4 grasses and have aggregated the production by C4 species across the Great Plains of N.A.

The control of production from either the isotope data or STATSGO derived estimates are similar. C4 is strongly predicted by high summer temperature and late growing season precipitation. Early season temperature increases favor C3 species.
Students can also study soil organic matter changes and document the advance of forest into modern grasslands as is occurring at Newton Hills.

3. Students can also use isotopic tracers in dietary studies. The project with The Nature Conservancy is testing hypotheses about the role of grazing in determining fire patterns and frequency in the Great Plains. Monthly assessments of diet from feces, hair samples, bone, or horn sheaths show that there is substantial dependence on C3 grasses at Konza and that this pattern is quite different at Tallgrass Prairie Preserve in Oklahoma. The bison data show a clear latitudinal trend in isotopic composition suggesting their value in climate reconstruction as well.

Similar procedures have documented dietary utilization by humans in North America as well as in the very dry Atacama Desert near Arica Chile and in the Canary Islands. The mummified samples from the Atacama desert include both the oldest known mummies and a near continuous record of coastal inhabitation for 10,000 to 12,000 years with diets ranging from highly dependent on marine resources to those dependent on material from the Andean Highlands.

The Guanche of the Canary Islands, in contrast, were nearly exclusively dependent upon terrestrial resources, largely barley based, although surrounded by marine resources. Students are now cooperation with scientists from Tenerife and are expanding these archeology studies with tree ring analyses to reconstruct past climates on these isolated islands.

 

Links

 

Student opportunities:

  • NASA Space Grant Internships
  • Field research and at the EROS Data Center
  • GANA (Grasslands of Asia and North America), and NSF-funded comparison of Great Plains, Mongolian, and Inner Mongolian grasslands field and lab research
  • Prairie Soil Organic Matter Dynamics and Remote Sensing field, lab and EROS positions

 

Bibliography

 

Abbreviated recent bibliography information (student names are in italics)

Journal Articles -  2011 - Present

Singh, R.K., Liu, S., Tieszen, L.L., Suyker, A.E., and Verma, S.B., in press, Estimating seasonal evapotranspiration from temporal satellite images: Irrigation Science. (Also available online at http://dx.doi.org/10.1007/s00271-011-0287-z.)

Gu, Y., Boyte, S.P., Wylie, B.K., and Tieszen, L.L., 2012, Identifying grasslands suitable for cellulosic feedstock crops in the Greater Platte River basin—dynamic modeling of ecosystem performance with 250 m eMODIS: Global Change Biology Bioenergy, v. 4, no. 1, p. 96-106. (Also available online at http://dx.doi.org/10.1111/j.1757-1707.2011.01113.x.)

Rover, J.A., Ji, L., Wylie, B.K., and Tieszen, L.L., 2012, Establishing water body areal extent trends in interior Alaska from multi-temporal Landsat data: Remote Sensing Letters, v. 3, no. 4, p. 595-604. (Also available online at http://dx.doi.org/10.1080/01431161.2011.643507.)

Singh, R.K., Liu, S., Tieszen, L.L., Suyker, A.E., and Verma, S.B., 2012, Novel approach for computing photosynthetically active radiation for productivity modeling using remotely sensed images in the Great Plains, United States: Journal of Applied Remote Sensing, v. 6, citation identifier 063522. (Also available online at http://dx.doi.org/10.1117/1.JRS.6.063522.)

Giri, C.P., Long, J.B., and Tieszen, L.L., 2011, Mapping and monitoring Louisiana's mangroves in the aftermath of the 2010 Gulf of Mexico Oil spill: Journal of Coastal Research, v. 27, no. 6, p. 1059-1064. (Also available online at http://dx.doi.org/10.2112/JCOASTRES-D-11-00028.1.)

Giri, C.P., Ochieng, E., Tieszen, L.L., Zhu, Z., Singh, A., Loveland, T.R., Masek, J., and Duke, N., 2011, Status and distribution of mangrove forests of the world using earth observation satellite data: Global Ecology and Biogeography, v. 20, no. 1, p. 154-159. (Also available online at http://dx.doi.org/10.1111/j.1466-8238.2010.00584.x.)

Silva, L.C.R., Giorgis, M.A., Anand, M., Enrico, L., Pérez-Harguindeguy, N., Falczuk, V., Tieszen, L.L., and Cabido, M., 2011, Evidence of shift in C4 species range in central Argentina during the late Holocene: Plant and Soil, v. 349, no. 1-2, p. 261-279. (Also available online at http://dx.doi.org/10.1007/s11104-011-0868-x.)

Zhang, L., Wylie, B.K., Ji, L., Gilmanov, T., Tieszen, L.L., and Howard, D., 2011, Upscaling carbon fluxes over the Great Plains grasslands—sinks and sources: Journal of Geophysical Research G—Biogeosciences, v. 116, citation number G00J03. (Also available online at http://dx.doi.org/10.1029/2010JG001504.)

Zhang, L., Wylie, B.K., Ji, L., Gilmanov, T.G., Tieszen, L.L., and Howard, D.M., 2011, Correction to "Upscaling carbon fluxes over the Great Plains grasslands—sinks and sources" (Journal of Geophysical Research (2011) 116 (G00J03) DOI: 10.1029/2010JG001504): Journal of Geophysical Research G: Biogeosciences, v. 116, no. 3. (Also available online at http://dx.doi.org/10.1029/2011JG001832.)

 

Books

Tieszen, L.L., 1993, Spatial, seasonal, and annual variation in characteristics of NDVI in grasslands of the Great Plains derived from 1-km NDVI data: Sioux Falls, S. Dak., Augustana College, 52 p.

Brown, J., Miller, P.C., Tieszen, L.L., and Bunnell, F., eds., 1980, An arctic ecosystem—the coastal tundra at Barrow, Alaska, US/IBP Synthesis Series, 12: Stroudsburg, Pa., Dowden, Hutchinson & Ross, Inc., 571 p. (Also available online at http://dx.doi.org/doi:10.1575/1912/222.)

Underwood, L.S., Tieszen, L.L., Callahan, A.B., and Folk, G.E., eds., 1979, Comparative mechanisms of cold adaptation: New York, Academic Press, 379 p.

Tieszen, L.L., ed., 1978, Vegetation and production ecology of an Alaskan arctic tundra, Ecological Studies, v. 29: New York, Springer-Verlag, 686 p.

Tieszen, L.L., ed., 1971, Tundra biome plant specialists meeting: International Biological Program, U.S. Tundra Biome, 14 p.

Tieszen, L.L., and Bonde, E.K., 1967, The influence of light intensity on growth and chlorophyll in arctic, subarctic, and alpine populations of Deschampsia caespitosa and Trisetum spicatum, University of Colorado Studies, Series in Biology, No. 25: Boulder, Colo., University of Colorado Press, 21 p.

Tieszen, L.L., 1965, Photosynthetic adaptations to light intensity in arctic and alpine populations of Deschampsia caespitosa [Ph.D. thesis]: Boulder, Colo., University of Colorado, 175 p.

 

Book Chapters 1990 - Present

Killeen, T.J., Siles, T.M., Grimwood, T., Tieszen, L.L., Steininger, M.K., Tucker, C.J., and Panfil, S., 2003, Habitat heterogeneity on a forest-savanna ecotone in Noel Kempff Mercado National Park (Santa Cruz, Bolivia)—implications for the long-term conservation of biodiversity in a changing climate, chap. 16 of Bradshaw, G.A., Marquet, P.A., and Ronnenberg, K.L., eds., How landscapes change—human disturbance and ecosystem fragmentation in the Americas, Ecological Studies, v. 162: New York, Springer, p. 285-312.

Fredlund, G., and Tieszen, L.L., 1998, Stable carbon isotope analysis of soil organic matter, chap. 42 of Collins, M.B., ed., Wilson-Leonard—an 11,000-year archeological record of hunter-gatherers in Central Texas, Studies in Archeology 31: Austin, Tex., Texas Archeological Research Laboratory, University of Texas at Austin, p. 1653-1656.

Tieszen, L.L., Reinhard, K.J., and Foreshoe, D.L., 1997, Applications of stable isotopes in the analysis of dietary patterns in the central and northern Great Plains, chap. 9 of Owsley, D.W., and Rose, J.C., eds., Bioarcheology of the north central United States, Arkansas Archeological Survey Research Series No. 49: Fayetteville, Ark., Arkansas Archeological Survey, p. 248-256.

Tiné, A., and Tieszen, L.L., 1997, Bioarcheology, chap. 8 of Kelley, D.B., ed., Two Caddoan farmsteads in the Red River Valley—the archeology of the McLelland and Joe Clark sites, Arkansas Archeological Survey Research Series No. 51: Fayetteville, Ark., Arkansas Archeological Survey, p. 121-137.

Tieszen, L.L., Matzner, S., and Buseman, S., 1995, Reconstruccion de la dieta de los guanches basada en isotopos estables C13 y N15, in Rodriguez Maffiotte, C., ed., Las momias guanches de Tenerife—proyecto CRONOS: Santa Cruz de Tenerife, Organismo Autónomo Complejo Insular de Museos y Centros, p. 77-78.

Reinhard, K.J., Tieszen, L.L., Sandness, K.L., Beiningen, L.M., Miller, E., Ghazi, A.M., Meiwald, C.E., and Barnum, S.V., 1994, Trade, contact, and female health in northeast Nebraska, chap. 6 of Larsen, C.S., and Milner, G.R., eds., In the wake of contact—biological responses to conquest: New York, Wiley-Liss, Inc., p. 63-74.

Tieszen, L.L., 1994, Stable isotopes on the Plains—vegetation analyses and diet determinations, chap. 21 of Owsley, D.W., and Jantz, R.L., eds., Skeletal biology in the Great Plains—migration, warfare, health, and subsistence: Washington, D.C., Smithsonian Press, p. 261-282.

Johnson, R.C., and Tieszen, L.L., 1993, Carbon isotope discrimination, water relations, and gas exchange in temperate grass species and accessions, chap. 19 of Ehleringer, J.R., Hall, A.E., and Farquhar, G.D., eds., Stable isotopes and plant carbon-water relations: San Diego, Calif., Academic Press, p. 281-296.

Roberts, M.J., Long, S.P., Tieszen, L.L., and Beadle, C.L., 1993, Measurement of plant biomass and net primary production of herbaceous vegetation, chap. 1 of Hall, D.O., Scurlock, J.M.O., Bolhar-Nordenkampf, H.R., Leegood, R.C., and Long, S.P., eds., Photosynthesis and production in a changing environment—a field and laboratory manual: New York, Chapman & Hall, p. 1-21.

Tieszen, L.L., and Fagre, T., 1993, Effect of diet quality and composition on the isotopic composition of respiratory CO2, bone collagen, bioapatite, and soft tissues, in Lambert, J.B., and Grupe, G., eds., Prehistoric human bone—archeology at the molecular level: New York, Springer-Verlag, p. 121-155.

Rose, J.E., Marks, M.K., and Tieszen, L.L., 1991, Bioarcheology and subsistence in the central and lower portions of the Mississippi Valley, chap. 2 of Powell, M.C., Bridges, P.S., and Mires, A.M.W., eds., What mean these bones—studies in southeastern bioarcheology: Tuscaloosa, University of Alabama Press, p. 7-21.

Tieszen, L.L., and Archer, S., 1990, Isotopic assessment of vegetation changes in grassland and woodland systems, chap. 8 of Osmond, C.B., Pitelka, L., and Hidy, G.M., eds., Plant biology of the basin and range, Ecological Studies, v. 80: New York, Springer-Verlag, p. 292-322.

Tieszen, L.L., and Bingyu, S., 1990, Stable carbon isotopic variation among plants of the Inner Mongolian grasslands, in Ba, Y., and Keli, P., eds., Reports from the Inner Mongolia grassland ecosystem research station of Academia Sinica: Beijing, Science Press, p. 273-287.

Reports

Tieszen, L.L., Tappan, G.G., Tan, Z., and Tachie-Obeng, E., 2011, Land cover change, biogeochemical modelling of carbon stocks,and climate change in West Africa, in Bombelli, A., and Valentini, R., eds., Africa and the carbon cycle—proceedings of the Open Science Conference on “Africa and Carbon Cycle—the CarboAfrica project” Accra (Ghana) 25-27 November 2008: FAO World Soil Resources Reports, No. 105, p. 75-83. (Also available online at http://www.fao.org/docrep/014/i2240e/i2240e00.htm.)

Liu, S., Tieszen, L.L., Zhao, S., Li, Z., and Liu, J., 2010, Developing a terrestrial biogeochemical cycle modeling system to support the management of Fort Benning and its surrounding areas: Ft. Belvoir, Defense Technical Information Center, SERDP-PROJECT-RC-1462, 76 p.

Singh, R.K., Liu, S., and Tieszen, L.L., 2010, Satellite-based evapotranspiration and gross primary productivity for the mid-continent intensive campaign [abs.], in Brady, S.R., ed., Proceedings of the Third USGS Modeling Conference, June 7-11, 2010, Broomfield, Colorado—Understanding and predicting for a changing world: U.S. Geological Survey Scientific Investigations Report, 2011-5147, p. 63, available only online.

Chen, M., Liu, S., and Tieszen, L.L., 2009, Mutually interactive state-parameter estimation of a carbon cycle model using a smoothed ensemble Kalman filter [abs.], in Brady, S.R., ed., Proceedings of the Second All-USGS Modeling Conference, February 11-14, 2008—Painting the big picture: U.S. Geological Survey Scientific Investigations Report, 2009-5013, p. 7-8, available only online at http://pubs.er.usgs.gov/publication/sir20095013.

Liu, S., Li, Z., Loveland, T.R., and Tieszen, L.L., 2009, Modeling terrestrial carbon dynamics in the eastern United States [abs.], in Brady, S.R., ed., Proceedings of the Second All-USGS Modeling Conference, February 11-14, 2008—Painting the big picture: U.S. Geological Survey Scientific Investigations Report, 2009-5013, p. 29, available only online at http://pubs.er.usgs.gov/publication/sir20095013.

Tan, Z., Tieszen, L.L., and Tachie-Obeng, E., 2009, Ecosystem carbon budgets and crop yields in a tropical savanna ecosystem as related to changes in climate and management [abs.], in Brady, S.R., ed., Proceedings of the Second All-USGS Modeling Conference, February 11-14, 2008—Painting the big picture: U.S. Geological Survey Scientific Investigations Report, 2009-5013, p. 39-39, available only online at http://pubs.er.usgs.gov/publication/sir20095013.

Zhang, L., Wylie, B.K., Ji, L., Gilmanov, T., and Tieszen, L.L., 2009, Empirically modeling carbon fluxes in the northern Great Plains grasslands [abs.], in Brady, S.R., ed., Proceedings of the Second All-USGS Modeling Conference, February 11-14, 2008—Painting the big picture: U.S. Geological Survey Scientific Investigations Report, 2009-5013, p. 48, available only online at http://pubs.er.usgs.gov/publication/sir20095013.

Cushing, W.M., Tappan, G.G., Mathis, M.L., and Tieszen, L.L., 2008, Rapid Land Cover Mapper—an introduction [abs.], in Helterbrand, W.S., and Sieverling, J.B., eds., Proceedings of the U.S. Geological Survey Seventh Biennial Geographic Information Science Workshop, Denver, Colorado, May 12-16, 2008: U.S. Geological Survey Scientific Investigations Report, 2008-5074, p. 12. (Also available online at http://pubs.er.usgs.gov/usgspubs/sir/sir20085074.)

Sundquist, E., Burruss, R., Faulkner, S., Gleason, R., Harden, J., Kharaka, Y., Tieszen, L.L., and Waldrop, M., 2008, Carbon sequestration to mitigate climate change: U.S. Geological Survey Fact Sheet, 2008-3097, 2 p. (Also available online at http://pubs.er.usgs.gov/publication/fs20083097.)

Wylie, B.K., Zhang, L., Ji, L., Tieszen, L.L., and Bliss, N.B., 2008, Modeling and dynamic monitoring of ecosystem performance in the Yukon River basin: U.S. Geological Survey Fact Sheet, 2008-3016, 2 p. (Also available online at http://pubs.er.usgs.gov/publication/fs20083016.)

Albright, T., Anthony, M.L., Bliss, N.B., Chen, M., Cushing, W.M., Dieye, A., Fosnight, E.A., Giri, C.P., Ji, L., Li, Z., Liu, J., Liu, S., Ramseth, A., Rover, J.A., Tan, Z., Tappan, G.G., Tieszen, L.L., van Praag, E., Wylie, B.K., and Zhang, L., 2007, Land cover applications, landscape dynamics, and global change: U.S. Geological Survey Fact Sheet, 2007-3040, 4 p. (Also available online at http://pubs.er.usgs.gov/publication/fs20073040.)

Rowland, J.D., Wood, E.C., and Tieszen, L.L., 2007, Review of remote sensing needs and applications in Africa: U.S. Geological Survey, Earth Resources Observation and Science Center, 124 p., available only online at http://lca.usgs.gov/lca/rsca/dataproducts.php.

Rowland, J.D., Wood, E.C., and Tieszen, L.L., 2007, Review of remote sensing needs and applications in Africa—executive summary: U.S. Geological Survey, Earth Resources Observation and Science Center, 16 p., available only online.

Chen, M., Liu, S., Tieszen, L.L., and Yuan, W., 2006, Suboptimal estimation of ecosystem carbon fluxes using an ensemble Kalman filter [abs.], in Frondorf, A., ed., Proceedings of the First All-USGS Modeling Conference, November 14-17, 2005: U.S. Geological Survey Scientific Investigations Report, 2006-5308, p. 5, available only online at http://pubs.er.usgs.gov/publication/sir20065308.

Liu, S., Liu, J., Loveland, T.R., Tieszen, L.L., and Chen, M., 2006, Integrated dynamic modeling of terrestrial carbon stocks and fluxes [abs.], in Frondorf, A., ed., Proceedings of the First All-USGS Modeling Conference, November 14-17, 2005: U.S. Geological Survey Scientific Investigations Report, 2006-5308, p. 15, available only online at http://pubs.er.usgs.gov/publication/sir20065308.

Knoepp, J.D., Tieszen, L.L., and Fredlund, G., 1998, Assessing the vegetation history of three southern Appalachian balds through soil organic matter analysis: U.S. Department of Agriculture, Forest Service, Southern Research Station, RP-SRS-013, 12 p. (Also available online at http://www.treesearch.fs.fed.us/pubs/461.)

Tieszen, L.L., 1995, Photosynthesis and energy transfer, in Clark, K.B., ed., Ocellus project, CD-ROM.

Tieszen, L.L., Cambardella, C., Kindscher, K., Schimel, D., and Reed, B.C., 1995, Assessment of climate and management induced directional changes in Great Plains vegetation with NDVI and stable carbon isotopes, in Annual Report to the U.S. Department of Energy: National Institute for Global Environmental Change, p. 46-49.

Tieszen, L.L., 1993, Primary production from greenness estimates—an isotopic analysis of soil organic matter, and C3 and C4 community delineations across the Great Plains, Final Report: Augustana College and Earth Resources Observation Systems, Sioux Falls, S. Dak., 8 p.

Rose, J.C., Marks, M.K., and Tieszen, L.L., 1985, Bioarcheology of the Little Cypress Bayou site, appendix IV, in Dicks, A.M., and Weed, C.S., eds., Archaeological investigations of the Little Cypress Bayou site (3CT50), Crittenden County Ark., vol. II., appendices: U.S. Army, Corps of Engineers, Memphis District, New World Research Report of Investigations No. 82-21, p. IV-1 - IV-53. (Also available online at http://handle.dtic.mil/100.2/ADA264364.)

Tieszen, L.L., 1971, Leaf area index—summary data report: U.S. Tundra Biome Program, 98 p.

 

Conference Papers  2001 - Present

Singh, R.K., Liu, S., and Tieszen, L.L., 2011, Sustainability of water resources in the Central Great Plains of the United States under changing land use and climate change, in Impacts of climate change on water resources in arid and semi-arid regions, International Symposium, Xi’an, China, 21–23 October 2011: International Association of Hydrological Sciences.

Tieszen, L.L., Owens, V., Mitchell, R., Jenkins, R., Gerik, T., Franzluebbers, A., Ferrell, J., Doolittle, J., Bliss, N.B., and Archer, D., 2011, Great Plains regional roadmap, in Braun, R., Karlen, D., and Johnson, D., eds., Sustainable alternative fuel feedstock opportunities, challenges and roadmaps for six U.S. regions, Sustainable Feedstocks for Advanced Biofuels Workshop, Atlanta, Ga., 28-30 September 2010, Proceedings: Ankeny, Iowa, Soil and Water Conservation Society, p. 398-402. (Also available online at http://www.swcs.org/roadmap.)

Holzfaster, R., Kristensen, D., Sneller, T., Tieszen, L.L., and Cassman, K., 2009, Biofuels, water resources and climate change—solving the sustainability puzzle, in Sustainability in a time of climate change—developing an intensive research framework for the Platte River basin and the High Plains, Climate Change Workshop, Lincoln, Nebr., 19-22 May 2008, Proceedings: University of Nebraska-Lincoln and the U.S. Geological Survey, p. 30-34. (Also available online at http://digitalcommons.unl.edu/researchecondev/7.)

Wylie, B.K., Rover, J.A., Murnaghan, K., Tieszen, L.L., and Brisco, B., 2009, Ecosystem modeling based upon remote sensing, site potential, and weather to monitor vegetation responses to climate, management, and disturbances, in Civco, D.L., ed., International Workshop on the Analysis of Multi-Temporal Remote Sensing Images, 5th, Groton, Conn., 28-30 July 2009, Conference Proceedings: University of Connecticut, Center for Land Use Education and Research, p. 184-191.

Chen, M., Liu, S., and Tieszen, L.L., 2007, Optimization of an ecosystem model through the assimilation of eddy flux observations using smoothed ensemble Kalman filter, in Moving towards the unified simulation approach, Summer Computer Simulation Conference, San Diego, Calif., 15-18 July 2007, Proceedings: San Diego, Calif., Society for Modeling and Simulation International, p. 875-882. (Also available online at http://dl.acm.org/citation.cfm?id=1358046.)

Liu, J., Liu, S., Tieszen, L.L., and Chen, M., 2007, Estimating soil erosion using the USPED model and consecutive remotely sensed land cover observations, in Moving towards the unified simulation approach, Summer Computer Simulation Conference, San Diego, Calif., 15-18 July 2007, Proceedings: San Diego, Calif., Society for Modeling and Simulation International, article number 16. (Also available online at http://dl.acm.org/citation.cfm?id=1358122.)

Chen, M., Liu, S., and Tieszen, L.L., 2006, State-parameter estimation of ecosystem models using a smoothed ensemble Kalman filter, in Vionov, A., Jakeman, A.J., and Rizzoli, A.E., eds., Summit on environmental modelling and software, International Environmental Modelling and Software Society, 3rd Biennial Meeting, Burlington, Vt., 9-13 July 2006, Proceedings: International Environmental Modelling and Software Society, unpaged, available only online at http://www.iemss.org/iemss2006/.

Liu, S., Li, Z., Liu, J., Loveland, T.R., Chen, M., and Tieszen, L.L., 2006, Upscaling terrestrial carbon dynamics from sites to regions with uncertainty measures—the GEMS experience, in Summit on environmental modelling and software, International Environmental Modelling and Software Society, 3rd Biennial Meeting, Burlington, Vt., 9-13 July 2006, Proceedings: International Environmental Modelling and Software Society, unpaged, available only online at http://www.iemss.org/iemss2006.

Wylie, B.K., Gilmanov, T.G., Johnson, D.A., Saliendra, N.Z., Tieszen, L.L., Doyle, R.A.F., and Laca, E.A., 2006, Scaling-up of CO2 fluxes to assess carbon sequestration in rangelands of central Asia, in Rangelands of central Asia, Conference on Transformations, Issues, and Future Challenges, Salt Lake City, Utah, 27 January 2004, Proceedings: Fort Collins, Colo., U.S. Department of Agriculture, p. 111-119. (Also available online at http://www.fs.fed.us/rm/pubs/rmrs_p039.pdf.)

Ricotta, C., Reed, B.C., and Tieszen, L.L., 2001, The contribution of C3 and C4 grasses to interannual variability in time-integrated NDVI over the U.S. Great Plains, in Analysis of multi-temporal remote sensing images, 1st International Workshop, Trento, Italy, 13-14 September 2001, Proceedings, v. 2: River Edge, N.J., World Scientific, p. 379-386. (Also available online at http://eproceedings.worldscinet.com/9789812777249/toc.shtml.)

van Praag, E.L., Tieszen, L.L., and Pedreros, D., 2001, Development of a regional clearinghouse for the dissemination of integrated information on natural hazards in Central America, in Sustainable development—GSDI for improved decision-making, GSDI, 5th, Cartagena, Colombia, 22-24 May 2001, Proceedings: Global Spatial Data Infrastructure Association, p. 1-6, available only online at http://gsdidocs.org/gsdiconf/GSDI-5/papers/EricvanPraag-Paper-USGS-Clearinghouse%20.pdf.