Reed, D.C., B.R. Deemer, S. van Grinsven, and J.A. Harrison. 2017. Are elusive anaerobic pathways key methane sinks in eutrophic lakes and reservoirs? Biogeochemistry doi: 10.1007/s10533-017-0356-3
Bridget R Deemer, Ph.D.
Biography
Broadly, I am interested in how human activities are affecting the way that energy and nutrients cycle through ecosystems. My research aims to better characterize how reservoirs can affect the transport and transformation of carbon (C), nitrogen (N), and other biologically relevant elements. My research also explores the potential role of management in affecting ecosystem function. Identifying reservoir management win-wins as well as trade-offs is critical as the quantity and quality of water becomes increasingly variable under a changing climate. Currently, I am working on a project to understand how conditions in Lake Powell (and the associated management of Glen Canyon Dam) are affecting ecosystem metabolism in the Colorado River.
Science and Products
Date published: January 18, 2017
Status: Active Uncovering the Base of the Food Web: Primary Production Dynamics in the Colorado River
Algae, phytoplankton, and rooted macrophytes represent the base of many aquatic food webs and are known as primary producers. Through photosynthesis, these organisms convert sunlight energy into chemical energy (i.e., carbon) that in turn fuels the growth of animals such as macroinvertebrates and fish. This project uses high frequency measurements of dissolved oxygen, which is a by-product of...
Pre-USGS Publications
Hayes, N.M, B.R. Deemer, J.R. Corman, N.R. Razavi, and K.E. Strock. 2017. Key differences between lakes and reservoirs modify climate signals: A case for a new conceptual model. Limnology and Oceanography Letters doi: 10.1002/lol2.10036
Harrison, J.A., B.R. Deemer, M.K. Birchfield, and M.T. O’Malley. 2017. Reservoir water level drawdowns accelerate and amplify methane emission. Environmental Science & Technology doi: 10.1021/acs.est.6b03185
Deemer, B.R., J.A. Harrison, S. Li, J. Beaulieu, T. DelSontro, N. Barros, M.A. dos Santos, J.F.Bezerra-Neto, S.M. Powers, and J.A. Vonk. 2016. Greenhouse gas emissions from reservoir water surfaces: A new global synthesis. BioScience doi: 10.1093/biosci/biw117
Deemer, B.R., S.M. Henderson, and J.A. Harrison. 2015. Chemical mixing in the bottom boundary layer of a eutrophic reservoir: the effects of internal seiching on nitrogen dynamics. Limnology and Oceanography 60: 1642-1655.
Deemer, B.R., K.E. Goodwin, T.A. Lee, M.K. Birchfield, K. Dallavis, J. Emerson, D. Freeman, E. Henry, L. Wynn, and J.A. Harrison. 2012. Elevated nitrogen and phosphorus concentrations in urbanizing southwest Washington streams. Northwest Science 86: 237-247.
Henderson, S.M., and B.R. Deemer. 2012. Vertical propagation of lakewide internal waves. Geophysical Research Letters 39: doi:10.1029/2011GL050534.
Deemer, B.R., J.A. Harrison, and E.W. Whitling. 2011. Microbial dinitrogen and nitrous oxide production in a small eutrophic reservoir: an in situ approach to quantifying hypolimnetic process rates. Limnology and Oceanography 56: 1189-1199.