Natalie Griffiths

Natalie A. Griffiths

Staff Scientist
Environmental Sciences Division and Climate Change Science Institute
Oak Ridge National Laboratory
Phone: (865) 576-3457

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  • Ph.D., University of Notre Dame, Biological Sciences, 2011
  • Honors B.Sc., University of Toronto, Zoology and Physiology, 2005

Research Focus

Ecosystem ecology and biogeochemistry and the impacts of anthropogenic activities on aquatic and terrestrial ecosystems 

Appointments and Research Experience:

2013-present: Staff Scientist, Environmental Sciences Division, ORNL.
2010-2013: Postdoctoral Research Associate, Environmental Sciences Division, ORNL.
2005-2010: Research and Teaching Assistant, Dept. of Biological Sciences, University of Notre Dame.
2002-2005: Undergraduate Theses and Research Assistant, Depts. of Zoology and Botany, University of Toronto.


Klaus, J., J.J. McDonnell, C.R. Jackson, E. Du, and N.A. Griffiths. 2015. Where does streamwater come from in low-relief forested watersheds? A dual isotope approach. Hydrology and Earth System Sciences 19:125-135.

Roley, S.S., J.L. Tank, N.A. Griffiths, R.O. Hall Jr., and R.T. Davis. 2014. The influence of floodplain restoration on whole-stream metabolism in an agricultural stream: insights from a 5-year continuous data set. Freshwater Science 33:1043-1059.

Dodds, W.K., S.M. Collins, S.K. Hamilton, J.L. Tank, S. Johnson, J.R. Webster, K.S. Simon, M.R. Whiles, H.M. Rantala, W.H. McDowell, S.D. Peterson, T. Riis, C.L. Crenshaw, S.A. Thomas, P.B. Kristensen, B.M. Cheever, A.S. Flecker, N.A. Griffiths, T. Crowl, E.J. Rosi-Marshall, R. El-Sabaawi, and E. Martí. 2014. You are not always what we think you eat: selective assimilation across multiple whole-stream isotopic tracer studies. Ecology 95:2757-2767.

Griffiths, N.A., and W.R. Hill. 2014. Temporal variation in the importance of a dominant consumer to stream nutrient cycling. Ecosystems 17:1169-1185.

Kominoski, J.S., J.J. Follstad Shah, C. Canhoto, D.G. Fischer, D.P. Gilling, E. González, N.A. Griffiths, A. Larrañaga, C.J. LeRoy, M.M. Mineau, Y.R. McElarney, S.M. Shirley, C.M. Swan, and S.D. Tiegs. 2013. Forecasting functional implications of global changes in riparian plant communities. Frontiers in Ecology and the Environment 11:423-432.

Griffiths, N.A., J.L. Tank, T.V. Royer, S.S. Roley, E.J. Rosi-Marshall, M.R. Whiles, J.J. Beaulieu, and L.T. Johnson. 2013. Agricultural land use alters the seasonality and magnitude of stream metabolism. Limnology and Oceanography 58:1513-1529.

Tiegs, S.D., J.E. Clapcott, N.A. Griffiths, and A.J. Boulton. 2013. A standardized cotton-strip assay for measuring organic-matter decomposition in streams. Ecological Indicators 32:131-139.

Griffiths, N.A., J.L. Tank, S.S. Roley, and M.L. Stephen. 2012. Decomposition of maize leaves and grasses in restored agricultural streams. Freshwater Science 31:848-864.

Griffiths, N.A., J.L. Tank, T.V. Royer, T.J. Warrner, T.C. Frauendorf, E.J. Rosi-Marshall, and M.R. Whiles. 2012. Temporal variation in organic carbon spiraling in Midwestern agricultural streams. Biogeochemistry 108: 149-169.

Parish, E.S., M.R. Hilliard, L.M. Baskaran, V.H. Dale, N.A. Griffiths, P.J. Mulholland, A. Sorokine, M.E. Downing, R.S. Middleton, and N.A. Thomas. 2012. Multimetric spatial optimization of switchgrass plantings across a watershed. Biofuels, Bioproducts and Biorefining 6:58-72.

Tank, J.L., E.J. Rosi-Marshall, T.V. Royer, M.R. Whiles, N.A. Griffiths, T.C. Frauendorf, and D.J. Treering. 2010. Occurrence of maize detritus and a transgenic insecticidal protein (Cry1Ab) within the stream network of an agricultural landscape. Proceedings of the National Academy of Sciences of the United States of America 107:17645-17650.

Chambers, C.P., M.R. Whiles, E.J. Rosi-Marshall, J.L. Tank, T.V. Royer, N.A. Griffiths, M.A. Evans-White, and A.J. Stojak. 2010. Responses of stream macroinvertebrates to Bt maize leaf detritus. Ecological Applications 20:1949-1960.

Tank, J.L., E.J. Rosi-Marshall, N.A. Griffiths, S.A. Entrekin, and M.L. Stephen. 2010. A review of allochthonous organic matter dynamics and metabolism in streams. Journal of the North American Benthological Society 29:118-146.

Warrner, T.J., T.V. Royer, J.L. Tank, N.A. Griffiths, E.J. Rosi-Marshall, and M.R. Whiles. 2009. Origin and bioavailability of dissolved organic carbon in agricultural headwater streams in Indiana, USA. Biogeochemistry 95:295-307.

Griffiths, N.A., J.L. Tank, T.V. Royer, E.J. Rosi-Marshall, M.R. Whiles, C.P. Chambers, T.C. Frauendorf, and M.A. Evans-White. 2009. Rapid decomposition of maize detritus in agricultural headwater streams. Ecological Applications 19:133-142.

Rosi-Marshall, E.J., J.L. Tank, T.V. Royer, M.R. Whiles, M. Evans-White, C. Chambers, N.A. Griffiths, J. Pokelsek, and M.L. Stephen. 2007. Toxins in transgenic crop byproducts may affect headwater stream ecosystems. Proceedings of the National Academy of Sciences of the United States of America 104:16204-16208.

Griffiths, N.A. and H. Cyr. 2006. Are there hot spots for Elliptio complanata in the shallow littoral zone of a large Canadian Shield lake? Canadian Journal of Fisheries and Aquatic Sciences 63:2137-2147.