Roanoke College Logo Campus Directory Profile

Image Not Avaliable

Dr. Meg Steinweg

Associate Professor

Department: Biology
Office: 406F Life Science



BS, Appalachian State University

MS, Colorado State University

PhD, Colorado State University

Research & Teaching Interests

One focus of my lab is microbial physiology to better understand how humans will impact nutrient cycling in different ecosystems, with a primary focus on carbon, nitrogen, and phosphorus. We use a variety of techniques, such as enzyme activity, carbon utilization profiles, carbon utilization efficiency, and modeling to better understand changes in microbial physiology under different disturbances. Currently there are several undergraduate researchers in my lab working on two projects: (1) microbial abundance and functional responses to human impact in caves and (2) microbial nutrient demand shifts under drought in a tall grass prairie.
The second focus of my lab is the abundance and diversity of ticks and tick-borne diseases in southwest Virginia. We are particularly interested in the presence of Borrelia burgdorferi, the causative agent of Lyme disease, and how its distribution may be changing over time and by habitat type.

Recent Publications

Rahmoeller M. and Steinweg J.M. 2020.An assessment of a quantitative methods course requirement for biology majors. Problems, Resources, and Issues in Mathematics Undergraduate Studies

Anderson L.J, Dosch J.J., Linquist E.S, McCay T.S., Machado J., Kuers K., Gartner T.B., Shea, K.L., Mankiewicz C., Rodgers J.L., Saunders P.A., Urban R.A., Kilgore J.S., Powell A.S., Ramage B.S., Steinweg J.M., Straub J.N., Bunnell S.L., Witkovsky-Eldred M. (accepted, 2020) Assessment of student learning in undergraduate courses with collaborative projects from the Ecological Research as Education Network (EREN). Scholarship and Practice of Undergraduate Research.

Steinweg J.M., Kostka J., Hanson P.J., Schadt C.W. 2018 The temperature sensitivity of extracellular enzymes mediating carbon, nitrogen, and phosphorus cycling differs with depth and season in an ombrotrophic peatland. Soil Biology & Biochemistry, 125:244-250.

Koyama A., Steinweg J.M., Haddix M.L., Dukes J.S, Wallenstein, M.D. 2018. Soil bacterial community response to altered precipitation and temperature regimes in an old field grassland were mediated by plants. FEMS Microbiology Ecology, 94, DOI 10.1093/femsec/fix156

Wang G., Jagadamma S., Mayes M.A., Schadt C.W., Steinweg J.M., Gu L., Post W.M. 2015. Microbial dormancy improves development and experimental validation of ecosystem model. ISME Journal, 9: 226-267.

Jagadamma S., Mayes M.A., Steinweg, J.M., Schaeffer S.M. 2014. Biogeosciences Discussion, 11:4451-4482.

Lin X., Tfaily M.,  Steinweg J.M., Chanton P., Esson K., Tang Z.K., Chanton J.P., Cooper W., Schadt C.W., and Kostka J.E. 2014. Microbial community stratification linked to the utilization of carbohydrates and phosphorus limitation in a boreal peatland at Marcell Experimental Forest. Applied Environmental Microbiology, 80:3518-3530.

Lin W., Tfaily M.M., Green S., Steinweg J.M., Chanton P., Imvittaya A., Chanton J.P., Cooper W., Schadt C., and  Kostka J.E. 2014. Microbial metabolic potential in carbon degradation and nutrient acquisition (N, P) in an ombrotrophic peatland. Applied Environmental Microbiology, 80: 3531-3540.

Jagadamma S., Steinweg J.M., Mayes M.A., Wang G., Post W.M. 2013. Decomposition of added and native organic carbon from physically separated fractions of diverse soils. Biology and Fertility of Soils, 50: 613-621.

Steinweg, J.M., Dukes, J.S., Paul, E.A., Wallenstein, M.D. 2013 Microbial response to multi-factor climate change: Effects on soil enzymes. Frontiers in Terrestrial Microbiology, 4, 1-11.

Bell, C.W., Fricks, B.E., Rocca, J.D., Steinweg, J.M., McMahon, S.K., Wallenstein, M.D. 2013. High-throughput fluorometric measurement of potential soil extracellular enzyme activities. Journal of Visualized Experiments, 81, e50961, doi 10.3791/50961.

Steinweg, J.M., Frerichs, J., Jagadamma, S., Mayes, M.A.  2013. Activation energy of extracellular enzymes in soils from different biomes. PLoS One, 8:e59943.

Steinweg J.M., Dukes J.S., Wallenstein M.D. 2012. Modeling the effects of temperature and moisture on soil enzyme activity: Linking laboratory assays to continuous field data. Soil Biology & Biochemistry 55, 85-92.

Wallenstein M., Allison S., Ernakovich J., Steinweg J.M., Sinsabaugh R. 2011. Controls on the temperature sensitivity of soil enzymes: A key driver of in-situ enzyme activity rates. Soil Enzymology. Pages 245-258 in G. Shukla, A. Varma, editors. Springer Berlin Heidelberg.

Conant R.T., Ryan M. G., Ågren G.I., Birge H.E., Davidson E.A., Eliasson P.E., Evans S.E., Frey S.D., Giardina C.P., Hopkins F., Hyvönen R., Kirschbaum M.U.F., Lavallee J.M, Leifeld J., Parton W.J., Steinweg J.M., Wallenstein M.D., Wetterstedt J.A.M., Bradford M.A. 2011. Temperature and soil organic matter decomposition - synthesis of current knowledge and a way forward. Global Change Biology, 17, 3392-3404.

Plante A.F., Fernández J.M., Haddix M.L., Steinweg J.M., Conant R.T. 2011. Biological, chemical and thermal indices of soil organic matter stability. Soil Biology & Biochemistry, 42, 1051-1058.

Haddix M.L., Plante  A.F., Conant R.T., Paul E.A., Six J., Steinweg J.M., Magrini-Bair K., Drijber R.A., Morris S.J. 2011. The role of soil characteristics on temperature sensitivity turnover. Soil Science Society of America, 75, 56-68.