Contact Information

For more information about classes, programs, and other professors in water resources at UGA, please see www.uga.edu/water

Book Review

The Answer Lies in the Soil

Research Interests

My scientific interests are directed at quantifying how nutrient and hydrologic cycles control the chemistry of forest soils, drainage waters, and forest productivity. My research focuses on the management of the soil resource in an effort to maximize forest growth and to maintain ecosystem quality. At the stand level this includes questions of fertilizer use efficiency, soil nutrient supplies, and long-term soil quality. At the landscape level this includes the effects of land management and land use change on soil and stream water chemistry, and watershed integrity. My current research includes:

1. -Indicators of forest ecosystem functions.
Functional Indicators,
2. -The effect of land use change on biogeochemical cycles in the Brazilian Amazon.
3. -The effect of upland soil tillage for plantation establishment on carbon storage and nutrient availability.
4. 
   
5. -Land use conversion effects on solution fluxes in streams of the Brazilian Cerrado.
6. -The effect of throughfall exclusion in a tropical forest on soil and soil solution interactions.
7. -The role of soil CO2 in mineral weathering and soil cation supplies.

Education

Ph.D., Department of Environment, Duke University, May, 1996. Dissertation: Soil acidification, soil potassium availability and biogeochemistry of aluminum and silicon in a 34 year-old loblolly pine (Pinus taeda L.) ecosystem in the Calhoun Experimental Forest, SC.

M.E.M., School of Forestry and Environmental Studies, Duke University, 1991. Thesis: Patterns in snowpack, soil solution, and streamwater chemical concentrations in an alpine-subalpine ecosystem, Fraser Experimental Forest, CO.

B.S., School of Natural Resources, University of Michigan, Ann Arbor, 1986.

Area of Specialization

• Soils

Courses Taught

FORS 3020 Forest Ecology

Teaching is focused on forest ecosystems with an emphasis on organism life histories as a means of understanding management needs.

AESC 3150 Sustainable agroecosystems in Brazil

This course is an outgrowth of a US-Brazil educational consortium. This course spends nine days in the state of Pernambuco along the Atlantic Ocean visiting various agricultural production facilities and remnant Atlantic rainforests and an additional nine days boating on the Amazon River visiting low impact forest harvest operations, a bauxite mine reforestation project, and subsistence agricultural communities.

FORS 7870 The Science of Sustainability

Recently, sustainability has become a very popular concept.  The Science of Sustainability, however, is a young science that is currently trying to develop criteria and indicators that will be utilized to guide sustainable natural resource management in the future.  The objective of this seminar is to investigate with graduate students this emerging science with a particular emphasis on the quantitative field measurements that are being proposed as sustainability indicators.  By the end of the semester students should be able to identify current frameworks for sustainability indicators as well as propose indicators in there own chosen field of study.

Publications

Book

Richter, DD & Markewitz, D. 2001. Understanding soil change. Cambridge Univesity Press.

Articles

Markewitz, D, JCF Resende, L Parron, M Bustamante, CA Klink, R de O Figueiredo, and EA Davidson.  2006. Dissolved rainfall inputs and streamwater outputs in an undisturbed watershed on highly weathered soils in the Brazilian cerrado.  Hydrological Processes, in press.

Markewitz, D, R de O Figueiredo,and EA Davidson. 2006.  CO₂-driven cation leaching after tropical forest clearing.  Journal of Geochemical Exploration 88:214-219.

Will, RE, D Markewitz, RL Hendrick, DF Meason, TR Crocker, and BE Borders. 2006 Nitrogen and Phosphorus dynamics for 13-year-old loblolly pine stands receiving complete competition control and annual N fertilizer.  Forest Ecology and Management 227:155-168.

 Markewitz, D, EA Davidson, P. Moutinho, and D. Nepstad. 2004. Nutrient loss and redistribution after forest clearing on a highly weathered soil in Amazonia. Ecological Applications, 14:S177-S199.

Meason, D, D Markewitz, and RE Will. 2004. Annual fertilisation and interspecific competition control: Effects on in situ forest floor nitrogen fluxes of different aged Pinus taeda stands in southeast Georgia, USA. Canadian Journal of Forest Research, 34:1802-1818.

Echeverria, M.E., D. Markewitz, L. Morris, and R.E. Hendrick. 2004. Changes in soil organic matter fractions resulting from complete control of competition in pine plantations of the Southeastern USA. Soil Science Society of America Journal, 68:950-958.

Borders, BD, R.E. Will, D. Markewitz, A. Clark, R. Hendrick, R.O. Teskey, and Y. Zhang. 2004. Effect of complete competition control and annual fertilization on stem growth and canopy relations for a chronosequence of loblolly pine plantations in the lower coastal plain of Georgia. Forest Ecology and Management, 192:21-37.

Keller, M.; Ane Alencar, A.; Asner, G.P.; Braswell, B.; Bustamante, M.; Davidson, E.; Feldpausch, T.; Fernandes, E.; Goulden, M.; Kabat, P.; Kruijt, B.; Luizão, F.; Miller, S.; Markewitz, D.; Nobre, A.; Nobre, C.; Priante-Filho, N.; Rocha, H.; Silva-Dias, P.; Randow, C. & Vourlitis, G.L. 2004. Ecological Research in the Large Scale Biosphere Atmosphere Experiment in Amazonia (LBA): A Discussion of Early Results. Ecological Application, 14:S3-S16.

Markewitz, D, C. Craft, and F. Sartori. 2002. Soil change and carbon storage in longleaf pine stands planted on marginal agricultural lands. Ecological Applications 12:1276-1285.

Nepstad, DC, P Moutinho, MB Dias-Filho, EA Davidson, G Cardinot, D Markewitz, R Figueiredo, N Viana, J Chambers, D Ray, JB Guerreiros, P Lefebvre, L Sternberg, M Moreira, L Barros, FY Ishida, I Tohlover, E Belk, K Kaliff, and K Schwalbe. 2002. The effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest. Journal of Geophysical Research, 107, D20, 8085.

Will, RE, MJ Wheeler, D Markewitz, MA Jacobson, and AM Shirley. 2002. Site preparation tillage effects on second and third year loblolly pine growth in the piedmont and upper coastal plain of Georgia. Southern Journal of Applied Forestry, 26:190-196.

Wheeler, MJ, RE Will, D Markewitz, MA Jacobson, and AM Shirley. 2002. Effects of soil tillage during site preparation on soil properties and loblolly pine seedling allometry and foliar nitrogen status. Southern Journal of Applied Forestry, 26:181-189.

Markewitz, D, EA Davidson, R de O Figueiredo, RL Victoria, & AV Krusche. 2001. Control of cation concentrations in stream waters by surface soil processes in an Amazonian watershed. Nature 410:802-805.

Nepstad, D, PR Moutinho, & Markewitz, D. 2001. The recovery of biomass, nutrient stocks, and hydrololgical function in secondary forests on deep soil. pp. 139-155. In McClain ME, RL Victoria & JE Richey (eds.), The biogeochemistry of the Amazon Basin and its role in a changing world. Oxford University Press.

Gaudinski, JB, SE Trumbore, EA Davidson, AC Cook, D Markewitz, and DD Richter. 2001. The age of fine-root carbon in three forests of the eastern United States measured by radiocarbon. Oecologia, 129:420-429.

Johnson, KH, D Wear, R Oren, RO Teskey, F Sanchez, RE Will, J Butnor, D Markewitz, DD Richter, T Rials, HL Allen, J Seiler, D Ellsworth, C Maier, G Katul, & PM Dougherty. 2001. Meeting global policy commitments: Carbon sequestration and southern pine forests. J. Forestry 99:14-21.

Glazer, RL and D Markewitz. 2001. A field trial using low application rates of polyacrylamide (PAM) to reduce soil erosion from disturbed piedmont soils. In Hatcher, KJ (ed.) Proceedings of the 2001 Georgia Water Resources Conference, Athens, Georgia.

Markewitz, D & DD Richter. 2000. Long-term soil potassium availability in a forested Kanhapludult. Forest Ecology and Management 130:109-129

Richter, DD, D Markewitz, PR Heine, V Jin, JA Raikes, K Tian, & CGWells. 2000. Legacies of agriculture and forest regrowth in the nitrogen of old-field soils. Forest Ecology and Management 138:233-248.

Richter, DD, D Markewitz, SE Trumbore, & CG Wells. 1999. Accumulation and turnover of radio- and organic carbon in soil of an aggrading forest. Nature 400:56-58.

Current Research Grants

Effect of tillage on soil physical properties and their relationship to early loblolly pine growth. 2006-2007. Traditional Industries Program for Pulp and Paper. {L. Morris and D. Markewitz}.

Ecosystem Service Scorecard and Field Trials 2005-2006. National Commission on Science for Sustainable Forestry. {D Markewitz}

Accounting for Forest Carbon Sequestration: A landowner primer. 2005-2006. National Commission on Science for Sustainable Forestry. {D Markewitz}

Dynamics of Biogeochemical Cycles in Secondary Vegetation of Amazonia. 2006-2008. NASA – Largescale Biosphere Atmosphere Project in Brazil. {E.A. Davidson with 7 other co-investigators)

Effects of Land Use Changes on the Functioning of Soils and Watersheds of Central Brazil Savannas: impacts on nutrient and carbon cycles and trace gas exchange. 2002-2006. NASA – Largescale Biosphere Atmosphere Project in Brazil. {R. Zepp with five other co-investigators)

Collaborative research: Drought effects on moist tropical forests: A throughfall reduction experiment in Amazonia. 2002-2007. National Science Foundation. {D.C. Nepstad, E.A. Davidson, and D Markewitz}

Recent Presentations

March 2005, Atlanta GA

World Congress of Soil Science July 2006

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