Current Research

My work is largely focused on the fluxes of greenhouse gases (CO2,H2O and CH4) between ecosystems and the atmosphere using the Eddy Covariance (EC) method.  My primary site is the Bog Lake Peatland, which is categorized as a poor fen and is located in the Marcell Experimental Forest (MEF) in northern Minnesota.  This site has a 10+ year history of EC fluxes and was one of the first peatland sites where CH4 flux measurements were conducted in the early 1990's.   I'm also involved in the data collection and archiving for various datasets from other watersheds within the MEF.

In addition to my work in northern peatlands, I'm also heavily involved in the research at a tropical peatland site in the Amazonian region of Peru.  This site is unique in that these tropical peatlands are understudied and relatively poorly understood.  This work is part of the Sustainable Wetlands Adaptation and Mitigation Program (SWAMP), which is coordinated by the Center for International Forestry Research (CIFOR), the USDA Forest Service (USFS) and Oregon State University with support from the US Agency for International Development (USAID).

Education

• Indiana University, M.S. Environmental Science Applied Ecology 2012
• Indiana University, Masters Of Public Affairs Environmental Policy and Natural Resource Management 2012
• Indiana University, B.S. Environmental Science Ecosystem Science 2011

Professional Experience

Featured Publications & Products

• Griffis, T.J. ; Roman, D.T. ; Wood, J.D. ; Deventer, J. ; Fachin, L. ; Rengifo, J. ; Del Castillo, D. ; Lilleskov, E. ; Kolka, R. ; Chimner, R.A. ; del Aguila-Pasquel, J. ; Wayson, C. ; Hergoualc'h, K. ; Baker, J.M. ; Cadillo-Quiroz, H. ; Ricciuto, D.M. . 2020. Hydrometeorological sensitivities of net ecosystem carbon dioxide and methane exchange of an Amazonian palm swamp peatland.
• Feng, Xue ; Deventer, M. Julian; Lonchar, Rachel ; Ng, G. H. Crystal; Sebestyen, Stephen D.; Roman, D. Tyler; Griffis, Timothy J.; Millet, Dylan B.; Kolka, Randall K. 2020. Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics.
• Deventer, M. Julian; Griffis, Timothy J.; Roman, D. Tyler; Kolka, Randall K.; Wood, Jeffrey D.; Erickson, Matt ; Baker, John M.; Millet, Dylan B. 2019. Error characterization of methane fluxes and budgets derived from a long-term comparison of open- and closed-path eddy covariance systems.

Publications

• Deventer, M Julian; Roman, Tyler ; Bogoev, Ivan ; Kolka, Randall K.; Erickson, Matt ; Lee, Xuhui ; Baker, John M.; Millet, Dylan B.; Griffis, Timothy J. 2021. Biases in open-path carbon dioxide flux measurements: Roles of instrument surface heat exchange and analyzer temperature sensitivity.
• Yi, Koong ; Maxwell, Justin T.; Wenzel, Matthew K.; Roman, D. Tyler; Sauer, Peter E.; Phillips, Richard P.; Novick, Kimberly A. 2018. Linking variation in intrinsic water-use efficiency to isohydricity: a comparison at multiple spatiotemporal scales.
• Hwang, Taehee; Gholizadeh, Hamed; Sims, Daniel A.; Novick, Kimberly A.; Brzostek, Edward R.; Phillips, Richard P.; Roman, Daniel T.; Robeson, Scott M.; Rahman, Abdullah F. 2017. Capturing species-level drought responses in a temperate deciduous forest using ratios of photochemical reflectance indices between sunlit and shaded canopies.
• Yi, Koong; Dragoni, Danilo; Phillips, Richard P.; Roman, Daniel Tyler; Novick, Kimberly A. 2017. Dynamics of stem water uptake among isohydric and anisohydric species experiencing a severe drought.
• Sulman, Benjamin N.; Roman, Daniel Tyler; Scanlon, Todd M.; Wang, Lixin; Novick, Kimberly A. 2016. Comparing methods for partitioning a decade of carbon dioxide and water vapor fluxes in a temperate forest.
• Sulman, Benjamin N.; Roman, Daniel Tyler; Yi, Koong; Wang, Lixin; Phillips, Richard P.; Novick, Kimberly A. 2016. High atmospheric demand for water can limit forest carbon uptake and transpiration as severely as dry soil.