Dale L. Bartos
860 North 1200 East
Logan, UT 84321
My current research includes efforts to determine the magnitude and causes of Sudden Aspen Decline (SAD) that is currently being observed in the Interior West. Among my other projects are studies designed to better understand the methods needed to restore aspen on the landscape to a level approaching its historic presence and how to minimize impacts that occur on the resulting aspen regeneration by ungulates (wildlife and livestock).
Study and understand the aspen (Populus tremuloides) ecosystems in the western U.S. How to restore aspen on the landscape after years of decline. Evaluate techniques to minimize animal (wildlife and livestock) impacts on aspen regeneration as a result of restoration efforts. Devise materials to aid in technology transfer to the Managers/Users. What are causes of Sudden Aspen Decline (SAD) that we are currently seeing in western areas.
Initial evaluation of current data indicates a decline (from historical levels) in aspen in the western U.S. These declines vary from 40-95% for various states in the west. My research helps to determine methods to restore aspen on the landscape at a level approaching historical levels. Also, technical transfer methods are beneficial when discussing aspen problems with the users. In some areas, there is a major concern about restoring aspen before it becomes extinct. My research is essential for Land Managers to make logical and correct decisions with respect to aspen restoration.
Pre Forest Service
1) Bartos, Dale L. 1968. Root-rhizome production in a mixed priarie grassland in Western Kansas. Fort Hays, KS: Kansas State College. 25p. Thesis.
2) Bartos, Dale; Hughes, Joesph. 1969. Preliminary methodology and results for root biomass sampling on the Pawnee Site. U.S. IBP Grassland Biome Tech. Rep. No. 2. Fort Collins, CO: Colorado State University, Natural Ecology Laboratory. 20p.
3) Bartos, Dale Lee. 1971. Root dynamics of a shorgrass ecosystem. Fort Collins, CO: Colorado State University. p. 129. Dissertation.
4) Sims, Phillip L.; Uresk, Daniel W.; Bartos, Dale L.; Lauenroth, William K.; Van Baker, Charles S. 1971. Herbage dynamics on the Pawnee Site: Aboveground and belowground herbage dynamics on the four grazing intensity treatments; and preliminary sampling on the ecosystem stress site. U.S. IBP Grassland Biome Tech. Rep. No. 99. Fort Collins, CO: Colorado State University, Natural Ecology Laboratory. 95 p.
Why This Research is Important
I have worked on aspen for the past 40 years. Initial work involved understanding the functioning of the aspen ecosystems and how they respond to disturbance (e.g. burning and cutting). In the past 10-15 years there has been a tremendous concern about decline (loss) of aspen from some of our western landscapes. Using past research and years of experience it is possible to share this information with the Land Manager. Much time is spent in aiding the manager/user in understanding the aspen systems and how best to restore them under current conditions.
- Fort Hays State University, Hays, KS, BS General Science, 1966
- Fort Hays State University, Hays, KS, MS Botany, 1968
- Colorado State University, Fort Collins, Ph.D. Range Science, 1972
- Research Ecologist, Rocky Mountain Research Station, Forestry Sciences Lab., Logan, Utah
2007 - Current
- Project Leader and Research Ecologist, Rocky Mountain Research Station, Forestry Sciences Lab., Logan, Utah
2001 - 2007
- Acting Project Leader, Rocky Mountain Research Station, Forestry Sciences Lab., Logan, Utah
2000 - 2001
- Research Ecologist, Intermountain Research Station/Rocky Mountain Research Station, Forestry Sciences Lab., Logan, Utah
1992 - 2000
- Operations Research Analyst, Intermountain Forest and Range Experiment Station, Ogden Utah
1984 - 1992
- Range Scientist, Intermountain Forest and Range Experiment Station, Logan Utah
1973 - 1984
- Botanist, Intermountain Forest and Range Experiment Station, Logan Utah
1972 - 1973
- Research Assistant, Colorado State University, Fort Collins, Colorado
1968 - 1971
Featured Publications & Products
- Hamilton, Randy; Megown, Kevin; DiBenedetto, Jeff; Bartos, Dale; Mileck, Anne. 2009. Assessing aspen using remote sensing.
- Bartos, Dale L. 2008. Great Basin aspen ecosystems.
- Bartos, Dale L.; Shepperd, Wayne D. 2010. The aspen mortality summit; December 18 and 19, 2006; Salt Lake City, UT.
- Shepperd, Wayne D.; Rogers, Paul C.; Burton, David; Bartos, Dale L. 2006. Ecology, biodiversity, management, and restoration of aspen in the Sierra Nevada.
- Shepperd, Wayne D.; Binkley, Dan; Bartos, Dale L.; Stohlgren, Thomas J.; Eskew, Lane G. 2001. Sustaining aspen in western landscapes: Symposium proceedings; 13-15 June 2000; Grand Junction, CO.
- Kota, Andrew M.; Bartos, Dale L. 2010. Evaluation of techniques to protect aspen suckers from ungulate browsing in the Black Hills.
Publications & Products
- Rogers, Paul C.; Bartos, Dale L.; Ryel, Ronald J. 2011. Historical patterns in lichen communities of montane quaking aspen forests.
- Oukrop, Chad M.; Evans, David M.; Bartos, Dale L.; Ramsey, R. Douglas; Ryel, Ronald J. 2011. Moderate-scale mapping methods of aspen stand types: a case study for Cedar Mountain in southern Utah.
- Tshireletso, K.; Malechek, J. C.; Bartos, D. L. 2010. Basal area growth for aspen suckers under simulated browsing on Cedar Mountain, southern Utah, western United States of America.
- Stam, B. R.; Malechek, J. C.; Bartos, D. L.; Browns, J. E.; Godfrey, E. B. 2008. Effect of conifer encroachment into aspen stands on understory biomass.
- Bartos, Dale L. 2007. Aspen [Chapter 3].
- Rogers, Paul C.; Shepperd, Wayne D.; Bartos, Dale L. 2007. Aspen in the Sierra Nevada: Regional conservation of a continental species.
- Sexton, Joseph O.; Ramsey, R. Douglas; Bartos, Dale L. 2006. Habitone analysis of quaking aspen in the Utah Book Cliffs: Effects of site water demand and conifer cover.
- Laycock, W. A.; Bartos, D. L.; Klement, K. D. 2004. Species richness inside and outside long-term exclosures.
- Shepperd, Wayne D.; Bartos, Dale L.; Mata, Stephen A. 2001. Above- and below-ground effects of aspen clonal regeneration and succession to conifers.
- Campbell, Robert B.; Bartos, Dale L. 2001. Aspen ecosystems: Objectives for sustaining biodiversity.
- Amacher, Michael C.; Johnson, Amber D.; Kutterer, Debra E.; Bartos, Dale L. 2001. First-year postfire and postharvest soil temperatures in aspen and conifer stands.
- Bartos, Dale L. 2001. Landscape dynamics of aspen and conifer forests.
- Amacher, Michael C.; Bartos, Dale L.; Christopherson, Tracy; Johnson, Amber D.; Kutterer, Debra E. 2001. Nitrogen mineralization in aspen/conifer soils after a natural fire.
- Laycock, W. A.; Bartos, Dale; Klement, Keith. 2001. Species richness has not increased after long-term protection from grazing on sagebrush, aspen and tall forb rangelands.
- Kay, Charles E.; Bartos, Dale L. 2000. Ungulate herbivory on Utah aspen: Assessment of longterm exclosures.
- Amacher, M. C.; Johnson, A. D.; Christopherson, T.; Kutterer, D. E.; Bartos, D. L.; Kotuby-Amacher, J. 1999. Nitrogen mineralization in the aspen ecosystem.
- Laycock, W. A.; Bartos, Dale. 1999. Vegetation species diversity inside and outside exclosures in sagebrush, salt desert shrub, and aspen communities.
- Bartos, Dale L.; Schmitz, Richard F. 1998. Characteristics of endemic-level mountain pine beetle populations in south-central Wyoming.
- Bartos, Dale L.; Campbell, Robert B., Jr. 1998. Decline of quaking aspen in the Interior West - examples from Utah.
- Bartos, Dale L.; Campbell, Robert B, Jr. 1997. Decline of aspen (Populus tremuloides) in the Interior West [Abstract 1].
- Bartos, Dale L. 1997. Decline of aspen (Populus tremuloides) in the Interior West [Abstract 2].
- Amacher, Michael C.; Bartos, Dale L. 1997. Soil properties associated with various stages of succession in the aspen ecosystem.
- Bartos, Dale L.; Booth, Gordon D. 1994. Effects of thinning on temperature dynamics and mountain pine beetle activity in a lodgepole pine stand.
- Bartos, Dale L.; Mueggler, Walter F.; Campbell, Robert B., Jr. 1991. Regeneration of aspen by suckering on burned sites in western Wyoming.
- Bartos, Dale L.; Gibson, Kenneth E. 1990. Insects of whitebark pine with emphasis on mountain pine beetle.
- Bartos, Dale L.; Harniss, Roy O. 1990. Pine hollow exclosures: Effect of browsing on an aspen community sprayed with 2,4-D.
- Bartos, Dale L.; Downing, Kent B. 1989. Evolution of a research prototype expert system for endemic populations of mountain pine beetle in lodgepole pine forests.
- Bartos, Dale L; Amman, Gene D. 1989. Microclimate: an alternative to tree vigor as a basis for mountain pine beetle infestations.
- Harniss, Roy O.; Bartos, Dale L. 1985. Survey of aspen stands treated with herbicides in the Western United States.
- Brown, Ray W.; Bartos, Dale L. 1982. A calibration model for screen-caged Peltier thermocouple psychrometers.
- Bartos, Dale L.; Ward, Frederick R.; Innis, George S. 1982. Aspen succession in the Intermountain West: A deterministic model.
- Mueggler, Walter F.; Bartos, Dale L. 1977. Grindstone Flat and Big Flat enclosures - 41-year record of changes in clearcut aspen communities.
- Johnston, Robert S.; Bartos, Dale L. 1977. Summary of nutrient and biomass data from two aspen sites in western United States.