Clear glass incubation bottles with Colorado River water and sediment for an experiment on phosphorus cycling
Bridget R Deemer, Ph.D.
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.
Professional Experience
Oct 2016-present: Research ecologist, USGS Southwest Biological Science Center, Flagstaff, AZ
April 2020-2022: Raelyn Cole Editorial Fellow, Association for the Sciences of Limnology and Oceanography (ASLO)
February-May 2013: Policy Fellow, Army Corps Institute for Water Resources, Alexandria, VA
Education and Certifications
2016 - PhD, Environmental and Natural Resource Sciences, Washington State University, Vancouver
• Dissertation: "Patterns and controls on nitrogen removal and greenhouse gas production in reservoir"
2010 - M.S. in Environmental Science, Washington State University
2004 - B.A. in Environmental Studies, Vassar College
Science and Products
Building a roadmap to integrate freshwater wetlands into the National Greenhouse Gas (GHG) Inventory
Lake Powell Research
Dissolved oxygen predictions for releases from Lake Powell under different management scenarios for Lake Powell releases
Phosphorus, nitrogen, carbon, calcium, pH, and dissolved oxygen data from incubations of Colorado River water and sediment and associated ambient river water measurements
Rainbow trout growth data and growth covariate data from Glen Canyon, Colorado River, Arizona, 2012-2021
Limnology data from Lake Powell, desert southwest USA (ver. 2.0, Sept. 2023)
Proximal and distal factors associated with the decline in secondary invertebrate prey production in the Colorado River, Glen Canyon, Arizona.
Gross primary production estimates and associated light, sediment, and water quality data from the Colorado River below Glen Canyon Dam
Modeled and measured greenhouse gas emissions from Lake Powell and bathymetric analysis of tributary littoral habitat at different water levels
Carbon, nitrogen, and phosphorus content of adult emergent Diptera before and after a fire-storm sequence in the Colorado River near Shinumo Creek, Grand Canyon, AZ
Calcium, magnesium and total dissolved solids data as well as modeled salinity and mass balance estimates for Lake Powell, 1952-2017
Clear glass incubation bottles with Colorado River water and sediment for an experiment on phosphorus cycling
eZ flow metrics: Using z-scores to estimate deviations from natural flow in the Colorado River below Glen Canyon Dam
Modeling the impacts of Glen Canyon Dam operations on Colorado River resources
U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program
Storms and pH of dam releases affect downstream phosphorus cycling in an arid regulated river
Linking ecosystem processes to consumer growth rates: Gross primary productivity as a driver of freshwater fish somatic growth in a resource-limited river
Inland water greenhouse gas budgets for RECCAP2: 1. State-of-the-art of global scale assessments
Inland water greenhouse gas budgets for RECCAP2: 2. Regionalization and homogenization of estimates
Declines in prey production during the collapse of a tailwater Rainbow Trout population are associated with changing reservoir conditions
Proceedings of the Fiscal Year 2022 Annual Reporting Meeting to the Glen Canyon Dam Adaptive Management Program
Appendix 1: Lake Powell water quality monitoring
Over half a century record of limnology data from Lake Powell, desert southwest United States: From reservoir filling to present day (1964–2021)
Drought related changes in water quality surpass effects of experimental flows on trout growth downstream of Lake Powell reservoir
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Building a roadmap to integrate freshwater wetlands into the National Greenhouse Gas (GHG) Inventory
Lake Powell Research
Dissolved oxygen predictions for releases from Lake Powell under different management scenarios for Lake Powell releases
Phosphorus, nitrogen, carbon, calcium, pH, and dissolved oxygen data from incubations of Colorado River water and sediment and associated ambient river water measurements
Rainbow trout growth data and growth covariate data from Glen Canyon, Colorado River, Arizona, 2012-2021
Limnology data from Lake Powell, desert southwest USA (ver. 2.0, Sept. 2023)
Proximal and distal factors associated with the decline in secondary invertebrate prey production in the Colorado River, Glen Canyon, Arizona.
Gross primary production estimates and associated light, sediment, and water quality data from the Colorado River below Glen Canyon Dam
Modeled and measured greenhouse gas emissions from Lake Powell and bathymetric analysis of tributary littoral habitat at different water levels
Carbon, nitrogen, and phosphorus content of adult emergent Diptera before and after a fire-storm sequence in the Colorado River near Shinumo Creek, Grand Canyon, AZ
Calcium, magnesium and total dissolved solids data as well as modeled salinity and mass balance estimates for Lake Powell, 1952-2017
Clear glass incubation bottles with Colorado River water and sediment for an experiment on phosphorus cycling
Clear glass incubation bottles with Colorado River water and sediment for an experiment on phosphorus cycling
eZ flow metrics: Using z-scores to estimate deviations from natural flow in the Colorado River below Glen Canyon Dam
Modeling the impacts of Glen Canyon Dam operations on Colorado River resources
U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program
Storms and pH of dam releases affect downstream phosphorus cycling in an arid regulated river
Linking ecosystem processes to consumer growth rates: Gross primary productivity as a driver of freshwater fish somatic growth in a resource-limited river
Inland water greenhouse gas budgets for RECCAP2: 1. State-of-the-art of global scale assessments
Inland water greenhouse gas budgets for RECCAP2: 2. Regionalization and homogenization of estimates
Declines in prey production during the collapse of a tailwater Rainbow Trout population are associated with changing reservoir conditions
Proceedings of the Fiscal Year 2022 Annual Reporting Meeting to the Glen Canyon Dam Adaptive Management Program
Appendix 1: Lake Powell water quality monitoring
Over half a century record of limnology data from Lake Powell, desert southwest United States: From reservoir filling to present day (1964–2021)
Drought related changes in water quality surpass effects of experimental flows on trout growth downstream of Lake Powell reservoir
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.