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Dr. Stephen K. Hamilton

Ecosystem Ecologist, Biogeochemist | PhD, University of California at Santa Barbara

Expertise
wetlands, streams, rivers and lakes, agricultural ecology, water quality, tropical rivers, floodplains

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Stephen Hamilton’s principal research interests involve ecosystem ecology and biogeochemistry, with particular emphasis on water. He has studied wetlands, streams, lakes, reservoirs, and watersheds, as well as agricultural cropping systems and their effects on water and climate. His research draws on multiple disciplines to understand and mitigate environmental problems and inform environmental protection and conservation.

Hamilton’s research publications include studies of nutrient cycling, greenhouse gas emissions, invasive species, food webs, remote sensing, conservation planning, and hydrology. He has received awards for his engagement with environmental issues from the Michigan Environmental Council and the Society for Freshwater Science, and is a Fellow of that society.

Hamilton has conducted a variety of studies in tropical floodplain and river ecosystems of South America and Australia, and presently works with several research groups in Brazil on hydropower effects on river systems.

As of 2024, Hamilton is retired from both Cary Institute and from his long-time position as a Professor at Michigan State University’s Kellogg Biological Station, though he will remain academically active. At Michigan State, Hamilton was a principal investigator for the National Science Foundation’s Long Term Ecological Research site and a Project Leader in the Department of Energy’s Great Lakes Bioenergy Research Center. He now lives in northern Michigan.

Mulholland, P.J., H.M. Valett, J.R. Webster, S. A. Thomas, L.W. Cooper, Stephen K. Hamilton, and B.J. Peterson. 2004. “Stream Denitrification And Total Nitrate Uptake Rates Measured Using A Field 15N Tracer Addition Approach”. Limnology And Oceanography 49 (3): 809-820. doi:10.4319/lo.2004.49.3.0809.
Webster, J.R., P.J. Mulholland, J.L. Tank, H.M. Valett, Walter K. Dodds, B.J. Peterson, W.B. Bowden, et al. 2003. “Factors Affecting Ammonium Uptake In Streams – An Inter-Biome Perspective”. Freshwater Biology 48 (8): 1329-1352. doi:10.1046/j.1365-2427.2003.01094.x.
Hamilton, Stephen K., SJ Sippel, and J.M. Melack. 2002. “Comparison Of Inundation Patterns Among Major South American Floodplains”. Journal Of Geophysical Research - Atmospheres 107 (D20): LBA 5-1 - LBA 5-14. doi:10.1029/2000JD000306.
Findlay, Stuart E. G., J.L. Tank, S. Dye, H.M. Valett, P.J. Mulholland, William H. McDowell, S.L. Johnson, et al. 2002. “A Cross-System Comparison Of Bacterial And Fungal Biomass In Detritus Pools Of Headwater Streams”. Microbial Ecology 43 (1): 55-66. doi:10.1007/s00248-001-1020-x.
Hamilton, Stephen K. 2002. “Human Impacts On Hydrology In The Pantanal Wetland Of South America”. Water Science & Technology 45 (11): 35-44. doi:10.2166/wst.2002.0377.
Mulholland, P.J., J.L. Tank, J.R. Webster, W.B. Bowden, W. K. Dodds, S.V. Gregory, N. B. Grimm, et al. 2002. “Can Uptake Length In Streams Be Determined By Nutrient Addition Experiments? Results From An Interbiome Comparison Study”. Journal Of The North American Benthological Society 21: 544-560. doi:10.2307/1468429.
Raikow, DF, and Stephen K. Hamilton. 2001. “Bivalve Diets In A Midwestern Us Stream: A Stable Isotope Enrichment Study”. Limnology And Oceanography 46 (3): 514-522. doi:10.4319/lo.2001.46.3.0514.
Peterson, B.J., WM Wollheim, P.J. Mulholland, J.R. Webster, J.L. Meyer, J.L. Tank, E. Marti, et al. 2001. “Control Of Nitrogen Export From Watersheds By Headwater Streams”. Science 292 (5514): 86-90. doi:10.1126/science.1056874.
Lewis, W.M., Stephen K. Hamilton, MA Rodriguez, JF Saunders, and MA Lasi. 2001. “Foodweb Analysis Of The Orinoco Floodplain Based On Production Estimates And Stable Isotope Data”. Journal Of The North American Benthological Society 20: 241-254. doi:10.2307/1468319.
Mulholland, P.J., CS Fellows, J.L. Tank, N. B. Grimm, J.R. Webster, Stephen K. Hamilton, E. Marti, et al. 2001. “Inter-Biome Comparison Of Factors Controlling Stream Metabolism”. Freshwater Biology 46 (11): 1503-1517. doi:10.1046/j.1365-2427.2001.00773.x.
Hamilton, Stephen K., J.L. Tank, DF Raikow, WM Wollheim, B.J. Peterson, and J.R. Webster. 2001. “Nitrogen Uptake And Transformation In A Midwestern Us Stream: A Stable Isotope Enrichment Study”. Biogeochemistry 54 (3): 297-340. doi:10.1023/A:1010635524108.
Lewis, W.M., Stephen K. Hamilton, MA Lasi, M Rodriguez, and JF Saunders. 2000. “Ecological Determinism On The Orinoco Floodplain”. Bioscience 50 (8): 681-692. doi:10.1641/0006-3568(2000)050{[}0681:EDOTOF]2.0.CO;2.
Smith, LK, W.M. Lewis, JP Chanton, G Cronin, and Stephen K. Hamilton. 2000. “Methane Emissions From The Orinoco River Floodplain, Venezuela”. Biogeochemistry 51 (2): 113-140. doi:10.1023/A:1006443429909.
Hamilton, Stephen K. 1999. “Potential Effects Of A Major Navigation Project (Paraguay-Paraná Hidrovía) On Inundation In The Pantanal Floodplains”. Regulated Rivers: Research And Management 15 (4): 289-299. doi:10.1002/(SICI)1099-1646(199907/08)15:4<289::AID-RRR520>3.0.CO;2-I.
Sippel, SJ, Stephen K. Hamilton, J.M. Melack, and EMM Novo. 1998. “Passive Microwave Observations Of Inundation Area And The Area/Stage Relation In The Amazon River Floodplain”. International Journal Of Remote Sensing 19 (16): 3055-3074. doi:10.1080/014311698214181.