Brian Tangen
Brian Tangen is an Ecologist with the USGS Northern Prairie Wildlife Research Center and works at the Lincoln, Nebraska duty station.
I began my professional career processing and identifying aquatic invertebrates and conducting a wide variety of field work for Northern Prairie's aquatics lab. I have worked in a variety of roles at Northern Prairie performing research focused on carbon and greenhouse gas cycling in wetland systems, wetland hydrology, wetland management, and effects of climate- and land-use change.
Professional Experience
Ecologist, USGS Northern Prairie Wildlife Research Center
Education and Certifications
M.S., Biological Sciences, North Dakota State University, 2001
B.A., Biology, Valley City State University, 1999
Affiliations and Memberships*
Society of Wetland Scientists
Science and Products
Filter Total Items: 20
Dissolved greenhouse gas concentrations and fluxes from Wetlands P7 and P8 of the Cottonwood Lake Study area, Stutsman County, North Dakota, 2015 Dissolved greenhouse gas concentrations and fluxes from Wetlands P7 and P8 of the Cottonwood Lake Study area, Stutsman County, North Dakota, 2015
A study was conducted to assess the relationships among carbon mineralization, sulfate reduction and greenhouse gas emissions in prairie pothole wetlands. These data are for dissolved methane and carbon dioxide concentrations and fluxes. Dissolved gas concentrations in the water column and fluxes to the atmosphere were estimated from April through November, 2015 for wetlands P7 and P8 of...
Aquatic invertebrates and vegetation and water-quality of Big Stone National Wildlife Refuge, Minnesota: 2013-2014 Aquatic invertebrates and vegetation and water-quality of Big Stone National Wildlife Refuge, Minnesota: 2013-2014
During 2013 and 2014 aquatic invertebrates were collected and vegetation was inventoried from sample locations distributed throughout Pool 10 and West Pool of Big Stone National Wildlife Refuge. Invertebrate sampling was conducted using aquatic activity traps and by collecting organisms from submersed vegetation. Vegetation was inventoried through a combination of visual observation and...
Filter Total Items: 45
Aquatic vegetation and invertebrate communities of Big Stone National Wildlife Refuge Aquatic vegetation and invertebrate communities of Big Stone National Wildlife Refuge
Observed degradation of aquatic systems at Big Stone National Wildlife Refuge, located in west-central Minnesota, have been associated with sediment-laden inflows from riverine systems. To support management, a study was conducted during 2013–2014 with overall goals of characterizing the aquatic invertebrate and vegetation communities of the Big Stone National Wildlife Refuge and...
Authors
Brian Tangen, Raymond Finocchiaro, Wesley E. Newton, Charles F. Dahl
Hydrologic lag effects on wetland greenhouse gas fluxes Hydrologic lag effects on wetland greenhouse gas fluxes
Hydrologic margins of wetlands are narrow, transient zones between inundated and dry areas. As water levels fluctuate, the dynamic hydrology at margins may impact wetland greenhouse gas (GHG) fluxes that are sensitive to soil saturation. The Prairie Pothole Region of North America consists of millions of seasonally-ponded wetlands that are ideal for studying hydrologic transition states...
Authors
Brian Tangen, Sheel Bansal
Effects of land use on greenhouse gas flux in playa wetlands and associated watersheds in the High Plains, USA Effects of land use on greenhouse gas flux in playa wetlands and associated watersheds in the High Plains, USA
In the High Plains, U.S., native prairie conversion to cropland agriculture has resulted in a loss of service delivery capabilities from most depressional wetlands as a result of sedimentation. Restoring historic hydrological conditions to affected wetlands may rejuvenate some services, however, there may be tradeoffs due to emissions of CH4 and N2O. We evaluated the influence of two...
Authors
Dale W. Daniel, Loren M. Smith, Scott T. McMurry, Brian Tangen, Charles F. Dahl, Ned Euliss, Ted LaGrange
Terrestrial wetlands Terrestrial wetlands
1. The assessment of terrestrial wetland carbon stocks has improved greatly since the First State of the Carbon Cycle Report (CCSP 2007) because of recent national inventories and the development of a U.S. soils database. Terrestrial wetlands in North America encompass an estimated 2.2 million km2, which constitutes about 37% of the global wetland area, with a soil and vegetation carbon...
Authors
Randall Kolka, Carl Trettin, Wenwu Tang, Ken W. Krauss, Sheel Bansal, Judith Z. Drexler, Kimberly P. Wickland, Rodney A. Chimner, Dianna M. Hogan, Emily Pindilli, Brian Benscoter, Brian Tangen, Evan S. Kane, Scott D. Bridgham, Curtis J. Richardson
Diurnal patterns of methane flux from a seasonal wetland: mechanisms and methodology Diurnal patterns of methane flux from a seasonal wetland: mechanisms and methodology
Methane emissions from wetlands are temporally dynamic. Few chamber-based studies have explored diurnal variation in methane flux with high temporal replication. Using an automated sampling system, we measured methane flux every 2.5 to 4 h for 205 diel cycles during three growing seasons (2013–2015) from a seasonal wetland in the Prairie Pothole Region of North America. During ponded...
Authors
Sheel Bansal, Brian Tangen, Raymond Finocchiaro
Prairie Pothole Region wetlands and subsurface drainage systems: Key factors for determining drainage setback distances Prairie Pothole Region wetlands and subsurface drainage systems: Key factors for determining drainage setback distances
Use of agricultural subsurface drainage systems in the Prairie Pothole Region of North America continues to increase, prompting concerns over potential negative effects to the Region's vital wetlands. The U.S. Fish and Wildlife Service protects a large number of wetlands through conservation easements that often utilize standard lateral setback distances to provide buffers between...
Authors
Brian Tangen, Mark T. Wiltermuth
Non-USGS Publications**
Tangen, B.A., Butler, M.G., and Ell, M.J., 2003, Weak correspondence between macroinvertebrate assemblages and land use in Prairie Pothole Region wetlands, USA: Wetlands, v. 23, p. 104–115.
**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
Filter Total Items: 20
Dissolved greenhouse gas concentrations and fluxes from Wetlands P7 and P8 of the Cottonwood Lake Study area, Stutsman County, North Dakota, 2015 Dissolved greenhouse gas concentrations and fluxes from Wetlands P7 and P8 of the Cottonwood Lake Study area, Stutsman County, North Dakota, 2015
A study was conducted to assess the relationships among carbon mineralization, sulfate reduction and greenhouse gas emissions in prairie pothole wetlands. These data are for dissolved methane and carbon dioxide concentrations and fluxes. Dissolved gas concentrations in the water column and fluxes to the atmosphere were estimated from April through November, 2015 for wetlands P7 and P8 of...
Aquatic invertebrates and vegetation and water-quality of Big Stone National Wildlife Refuge, Minnesota: 2013-2014 Aquatic invertebrates and vegetation and water-quality of Big Stone National Wildlife Refuge, Minnesota: 2013-2014
During 2013 and 2014 aquatic invertebrates were collected and vegetation was inventoried from sample locations distributed throughout Pool 10 and West Pool of Big Stone National Wildlife Refuge. Invertebrate sampling was conducted using aquatic activity traps and by collecting organisms from submersed vegetation. Vegetation was inventoried through a combination of visual observation and...
Filter Total Items: 45
Aquatic vegetation and invertebrate communities of Big Stone National Wildlife Refuge Aquatic vegetation and invertebrate communities of Big Stone National Wildlife Refuge
Observed degradation of aquatic systems at Big Stone National Wildlife Refuge, located in west-central Minnesota, have been associated with sediment-laden inflows from riverine systems. To support management, a study was conducted during 2013–2014 with overall goals of characterizing the aquatic invertebrate and vegetation communities of the Big Stone National Wildlife Refuge and...
Authors
Brian Tangen, Raymond Finocchiaro, Wesley E. Newton, Charles F. Dahl
Hydrologic lag effects on wetland greenhouse gas fluxes Hydrologic lag effects on wetland greenhouse gas fluxes
Hydrologic margins of wetlands are narrow, transient zones between inundated and dry areas. As water levels fluctuate, the dynamic hydrology at margins may impact wetland greenhouse gas (GHG) fluxes that are sensitive to soil saturation. The Prairie Pothole Region of North America consists of millions of seasonally-ponded wetlands that are ideal for studying hydrologic transition states...
Authors
Brian Tangen, Sheel Bansal
Effects of land use on greenhouse gas flux in playa wetlands and associated watersheds in the High Plains, USA Effects of land use on greenhouse gas flux in playa wetlands and associated watersheds in the High Plains, USA
In the High Plains, U.S., native prairie conversion to cropland agriculture has resulted in a loss of service delivery capabilities from most depressional wetlands as a result of sedimentation. Restoring historic hydrological conditions to affected wetlands may rejuvenate some services, however, there may be tradeoffs due to emissions of CH4 and N2O. We evaluated the influence of two...
Authors
Dale W. Daniel, Loren M. Smith, Scott T. McMurry, Brian Tangen, Charles F. Dahl, Ned Euliss, Ted LaGrange
Terrestrial wetlands Terrestrial wetlands
1. The assessment of terrestrial wetland carbon stocks has improved greatly since the First State of the Carbon Cycle Report (CCSP 2007) because of recent national inventories and the development of a U.S. soils database. Terrestrial wetlands in North America encompass an estimated 2.2 million km2, which constitutes about 37% of the global wetland area, with a soil and vegetation carbon...
Authors
Randall Kolka, Carl Trettin, Wenwu Tang, Ken W. Krauss, Sheel Bansal, Judith Z. Drexler, Kimberly P. Wickland, Rodney A. Chimner, Dianna M. Hogan, Emily Pindilli, Brian Benscoter, Brian Tangen, Evan S. Kane, Scott D. Bridgham, Curtis J. Richardson
Diurnal patterns of methane flux from a seasonal wetland: mechanisms and methodology Diurnal patterns of methane flux from a seasonal wetland: mechanisms and methodology
Methane emissions from wetlands are temporally dynamic. Few chamber-based studies have explored diurnal variation in methane flux with high temporal replication. Using an automated sampling system, we measured methane flux every 2.5 to 4 h for 205 diel cycles during three growing seasons (2013–2015) from a seasonal wetland in the Prairie Pothole Region of North America. During ponded...
Authors
Sheel Bansal, Brian Tangen, Raymond Finocchiaro
Prairie Pothole Region wetlands and subsurface drainage systems: Key factors for determining drainage setback distances Prairie Pothole Region wetlands and subsurface drainage systems: Key factors for determining drainage setback distances
Use of agricultural subsurface drainage systems in the Prairie Pothole Region of North America continues to increase, prompting concerns over potential negative effects to the Region's vital wetlands. The U.S. Fish and Wildlife Service protects a large number of wetlands through conservation easements that often utilize standard lateral setback distances to provide buffers between...
Authors
Brian Tangen, Mark T. Wiltermuth
Non-USGS Publications**
Tangen, B.A., Butler, M.G., and Ell, M.J., 2003, Weak correspondence between macroinvertebrate assemblages and land use in Prairie Pothole Region wetlands, USA: Wetlands, v. 23, p. 104–115.
**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.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government