Jason Rohweder
I have interdisciplinary expertise in biology, geographical information systems (GIS) and application programming. My work emphasizes landscape ecology and the creation of flexible tools and models to assess species habitat.
Recent Projects:
- Web mapping application development
- West Newton Chute Native Mussel Story Map
- Upper Mississippi River System - Systemic Spatial Data Viewer
- Upper Mississippi River Restoration - Long Term Resource Monitoring element - Spatial Data Query Tool
- Upper Mississippi River System - Historic Map Viewer
- Isle Royale National Park - Modelling spatial and temporal variability in browsing by moose under varying predation scenarios
- Tool and data development in support of the Monarch Conservation Science Partnership
- Monarch Conservation Science Partnership Map Viewer and Tools
- Management Unit Prioritization Tools
- Anticipated Effects of Development on Habitat Fragmentation and Movement of Mammals Into and Out of the Schoodic District, Acadia National Park, Maine
- Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects
- 2012 update
- LINK: ArcGIS Tools for Conservation Planning
Education and Certifications
1998 M.S., Resource Analysis, Saint Mary’s University of Minnesota
1995 B.S., Ecology, Winona State University
Science and Products
Filter Total Items: 18
Segment-scale classification, large rivers of the Upper Midwest United States Segment-scale classification, large rivers of the Upper Midwest United States
This dataset is part of a multi-scale assessment and classification for segments of 15 rivers of the Upper Midwest United States that meet various criteria for largeness. All rivers are tributary to the Mississippi River system. The 11,600 kilometers (km) that qualified as large were parsed into 10-kilometer-long segments and classified by major alterations (free-flowing, navigation...
2010 Monarch Relevant Land Cover Data Set for Mexico 2010 Monarch Relevant Land Cover Data Set for Mexico
The USGS Upper Midwest Environmental Sciences Center developed a Monarch Relevant Land Cover data set covering the area of Mexico. We used the 2010 land cover data set produced by the tri-national North American Land Change Monitoring System (NALCMS) and supported by the Commission for Environmental Cooperation (CEC) that depicts year 2010 land cover across North America at 30-meter...
2010 Monarch Relevant Land Cover Data Set for Canada 2010 Monarch Relevant Land Cover Data Set for Canada
The USGS Upper Midwest Environmental Sciences Center developed a Monarch Relevant Land Cover data set covering the area of Canada. We used the 2010 land cover data set produced by the tri-national North American Land Change Monitoring System (NALCMS) and supported by the Commission for Environmental Cooperation (CEC) that depicts year 2010 land cover across North America at 30-meter...
UMRS Floodplain Inundation Attributes UMRS Floodplain Inundation Attributes
Floodplain inundation is believed to be the dominant physical driver of an array of ecosystem patterns and processes in the Upper Mississippi River System (UMRS). Here, we present the results of a geospatial surface-water connectivity model in support of ecological investigations fully described in the USGS Open File Report entitled Indicators of Ecosystem Structure and Function for the...
2010/11 Level 3 Aquatic Areas - Upper Mississippi River System 2010/11 Level 3 Aquatic Areas - Upper Mississippi River System
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS). Aerial images of Pools 3-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of 2010 at 8/pixel and 16/pixel respectively using a mapping...
2010/11 Level 2 Aquatic Areas - Upper Mississippi River System 2010/11 Level 2 Aquatic Areas - Upper Mississippi River System
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS). Aerial images of Pools 3-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of 2010 at 8/pixel and 16/pixel respectively using a...
Filter Total Items: 37
Spatially explicit modelling of floodplain forest succession: Interactions among flood inundation, forest successional processes, and other disturbances in the Upper Mississippi River floodplain, USA Spatially explicit modelling of floodplain forest succession: Interactions among flood inundation, forest successional processes, and other disturbances in the Upper Mississippi River floodplain, USA
Simulation models are often used to identify hydrologic regimes suitable for different riparian or floodplain tree species. However, most existing models pay little attention to forest successional processes or other disturbances that may interact with the hydrologic regime of river systems to alter forest dynamics in space and time. In this study, we introduce a flood disturbance module...
Authors
Nathan De Jager, Molly Van Appledorn, Timothy Fox, Jason Rohweder, Lyle Guyon, Andrew Meier, Robert Cosgriff, Benjamin Vandermyde
Upper Mississippi River Restoration Program Long Term Resource Monitoring element—Spatial data query tool Upper Mississippi River Restoration Program Long Term Resource Monitoring element—Spatial data query tool
The Upper Mississippi River Restoration (UMRR) Program Long Term Resource Monitoring (LTRM) element has been monitoring fish, water quality, and vegetation in six study pools in the Upper Mississippi River system for approximately 30 years. Geographic locations were recorded for all sampling points. All of this information has been made publicly available by way of data download and...
Authors
Jason Rohweder
Indicators of ecosystem structure and function for the Upper Mississippi River System Indicators of ecosystem structure and function for the Upper Mississippi River System
This report documents the development of quantitative measures (indicators) of ecosystem structure and function for use in a Habitat Needs Assessment (HNA) for the Upper Mississippi River System (UMRS). HNAs are led periodically by the U.S. Army Corps of Engineers’ Upper Mississippi River Restoration (UMRR) Program, which is the primary habitat restoration program on the UMRS. The UMRR...
Authors
Nathan De Jager, James Rogala, Jason Rohweder, Molly Van Appledorn, Kristen Bouska, Jeffrey Houser, Kathi Jankowski
Restoring monarch butterfly habitat in the Midwestern US: 'All hands on deck' Restoring monarch butterfly habitat in the Midwestern US: 'All hands on deck'
The eastern migratory population of monarch butterflies (Danaus plexippus plexippus) has declined by >80% within the last two decades. One possible cause of this decline is the loss of ≥1.3 billion stems of milkweed (Asclepias spp.), which monarchs require for reproduction. In an effort to restore monarchs to a population goal established by the US Fish and Wildlife Service and adopted...
Authors
Wayne Thogmartin, Laura Lopez-Hoffman, Jason Rohweder, James E. Diffendorfer, Ryan Drum, Darius Semmens, Scott Black, Iris Caldwell, Donita Cotter, Pauline Drobney, Laura Jackson, Michael Gale, Doug Helmers, Steven Hilburger, Elizabeth Howard, Karen Oberhauser, John M. Pleasants, Brice Semmens, Orley Taylor, Patrick Ward, Jake F. Weltzin, Ruscena Wiederholt
Modelling moose–forest interactions under different predation scenarios at Isle Royale National Park, USA Modelling moose–forest interactions under different predation scenarios at Isle Royale National Park, USA
Loss of top predators may contribute to high ungulate population densities and chronic over-browsing of forest ecosystems. However, spatial and temporal variability in the strength of interactions between predators and ungulates occurs over scales that are much shorter than the scales over which forest communities change, making it difficult to characterize trophic cascades in forest...
Authors
Nathan De Jager, Jason Rohweder, Brian Miranda, Brian Sturtevant, Timothy Fox, Mark Romanski
Changes in aquatic vegetation and floodplain land cover in the Upper Mississippi and Illinois rivers (1989–2000–2010) Changes in aquatic vegetation and floodplain land cover in the Upper Mississippi and Illinois rivers (1989–2000–2010)
Quantifying changes in the cover of river-floodplain systems can provide important insights into the processes that structure these landscapes as well as the potential consequences to the ecosystem services they provide. We examined net changes in 13 different aquatic and floodplain land cover classes using photo interpreted maps of the navigable portions of the Upper Mississippi River...
Authors
Nathan De Jager, Jason Rohweder
Relating mesocarnivore relative abundance to anthropogenic land-use with a hierarchical spatial count model Relating mesocarnivore relative abundance to anthropogenic land-use with a hierarchical spatial count model
There is growing need to develop models of spatial patterns in animal abundance, yet comparatively few examples of such models exist. This is especially true in situations where the abundance of one species may inhibit that of another, such as the intensively-farmed landscape of the Prairie Pothole Region (PPR) of the central United States, where waterfowl production is largely...
Authors
Shawn Crimmins, Liza Walleser, Dan Hertel, Patrick C. McKann, Jason Rohweder, Wayne Thogmartin
The Upper Mississippi River floodscape: spatial patterns of flood inundation and associated plant community distributions The Upper Mississippi River floodscape: spatial patterns of flood inundation and associated plant community distributions
Questions How is the distribution of different plant communities associated with patterns of flood inundation across a large floodplain landscape? Location Thirty-eight thousand nine hundred and seventy hectare of floodplain, spanning 320 km of the Upper Mississippi River (UMR). Methods High-resolution elevation data (Lidar) and 30 yr of daily river stage data were integrated to produce...
Authors
Nathan De Jager, Jason Rohweder, Yao Yin, Erin Hoy
A case study of assigning conservation value to dispersed habitat units for conservation planning A case study of assigning conservation value to dispersed habitat units for conservation planning
Resource managers are increasingly tasked with developing habitat conservation plans in the face of numerous, sometimes competing, objectives. These plans must often be implemented across dispersed habitat conservation units that may contribute unequally to overall conservation objectives. Using U.S. Fish and Wildlife Service waterfowl production areas (WPA) in western Minnesota as our
Authors
Jason Rohweder, Sara C. Vacek, Shawn Crimmins, Wayne Thogmartin
Decision support system development at the Upper Midwest Environmental Sciences Center Decision support system development at the Upper Midwest Environmental Sciences Center
A Decision Support System (DSS) can be defined in many ways. The working definition used by the U.S. Geological Survey Upper Midwest Environmental Sciences Center (UMESC) is, “A spatially based computer application or data that assists a researcher or manager in making decisions.” This is quite a broad definition—and it needs to be, because the possibilities for types of DSSs are limited...
Authors
Timothy Fox, J. C. Nelson, Jason J. Rohweder
Past and predicted future changes in the land cover of the Upper Mississippi River floodplain, USA Past and predicted future changes in the land cover of the Upper Mississippi River floodplain, USA
This study provides one historical and two alternative future contexts for evaluating land cover modifications within the Upper Mississippi River (UMR) floodplain. Given previously documented changes in land use, river engineering, restoration efforts and hydro-climatic changes within the UMR basin and floodplain, we wanted to know which of these changes are the most important...
Authors
N. R. De Jager, J.J. Rohweder, J.C. Nelson
Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects
Models based upon coastal engineering equations have been developed to quantify wind fetch length and several physical wave characteristics including significant height, length, peak period, maximum orbital velocity, and shear stress. These models were used to quantify differences in proposed island construction designs for three Habitat Rehabilitation and Enhancement Projects (HREPs) in...
Authors
Jason Rohweder, James Rogala, Barry Johnson, Dennis Anderson, Steve Clark, Ferris Chamberlin
Science and Products
Filter Total Items: 18
Segment-scale classification, large rivers of the Upper Midwest United States Segment-scale classification, large rivers of the Upper Midwest United States
This dataset is part of a multi-scale assessment and classification for segments of 15 rivers of the Upper Midwest United States that meet various criteria for largeness. All rivers are tributary to the Mississippi River system. The 11,600 kilometers (km) that qualified as large were parsed into 10-kilometer-long segments and classified by major alterations (free-flowing, navigation...
2010 Monarch Relevant Land Cover Data Set for Mexico 2010 Monarch Relevant Land Cover Data Set for Mexico
The USGS Upper Midwest Environmental Sciences Center developed a Monarch Relevant Land Cover data set covering the area of Mexico. We used the 2010 land cover data set produced by the tri-national North American Land Change Monitoring System (NALCMS) and supported by the Commission for Environmental Cooperation (CEC) that depicts year 2010 land cover across North America at 30-meter...
2010 Monarch Relevant Land Cover Data Set for Canada 2010 Monarch Relevant Land Cover Data Set for Canada
The USGS Upper Midwest Environmental Sciences Center developed a Monarch Relevant Land Cover data set covering the area of Canada. We used the 2010 land cover data set produced by the tri-national North American Land Change Monitoring System (NALCMS) and supported by the Commission for Environmental Cooperation (CEC) that depicts year 2010 land cover across North America at 30-meter...
UMRS Floodplain Inundation Attributes UMRS Floodplain Inundation Attributes
Floodplain inundation is believed to be the dominant physical driver of an array of ecosystem patterns and processes in the Upper Mississippi River System (UMRS). Here, we present the results of a geospatial surface-water connectivity model in support of ecological investigations fully described in the USGS Open File Report entitled Indicators of Ecosystem Structure and Function for the...
2010/11 Level 3 Aquatic Areas - Upper Mississippi River System 2010/11 Level 3 Aquatic Areas - Upper Mississippi River System
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS). Aerial images of Pools 3-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of 2010 at 8/pixel and 16/pixel respectively using a mapping...
2010/11 Level 2 Aquatic Areas - Upper Mississippi River System 2010/11 Level 2 Aquatic Areas - Upper Mississippi River System
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS). Aerial images of Pools 3-13 Upper Mississippi River System and Pools, Alton-Marseilles, Illinois River were collected in color infrared (CIR) in August of 2010 at 8/pixel and 16/pixel respectively using a...
Filter Total Items: 37
Spatially explicit modelling of floodplain forest succession: Interactions among flood inundation, forest successional processes, and other disturbances in the Upper Mississippi River floodplain, USA Spatially explicit modelling of floodplain forest succession: Interactions among flood inundation, forest successional processes, and other disturbances in the Upper Mississippi River floodplain, USA
Simulation models are often used to identify hydrologic regimes suitable for different riparian or floodplain tree species. However, most existing models pay little attention to forest successional processes or other disturbances that may interact with the hydrologic regime of river systems to alter forest dynamics in space and time. In this study, we introduce a flood disturbance module...
Authors
Nathan De Jager, Molly Van Appledorn, Timothy Fox, Jason Rohweder, Lyle Guyon, Andrew Meier, Robert Cosgriff, Benjamin Vandermyde
Upper Mississippi River Restoration Program Long Term Resource Monitoring element—Spatial data query tool Upper Mississippi River Restoration Program Long Term Resource Monitoring element—Spatial data query tool
The Upper Mississippi River Restoration (UMRR) Program Long Term Resource Monitoring (LTRM) element has been monitoring fish, water quality, and vegetation in six study pools in the Upper Mississippi River system for approximately 30 years. Geographic locations were recorded for all sampling points. All of this information has been made publicly available by way of data download and...
Authors
Jason Rohweder
Indicators of ecosystem structure and function for the Upper Mississippi River System Indicators of ecosystem structure and function for the Upper Mississippi River System
This report documents the development of quantitative measures (indicators) of ecosystem structure and function for use in a Habitat Needs Assessment (HNA) for the Upper Mississippi River System (UMRS). HNAs are led periodically by the U.S. Army Corps of Engineers’ Upper Mississippi River Restoration (UMRR) Program, which is the primary habitat restoration program on the UMRS. The UMRR...
Authors
Nathan De Jager, James Rogala, Jason Rohweder, Molly Van Appledorn, Kristen Bouska, Jeffrey Houser, Kathi Jankowski
Restoring monarch butterfly habitat in the Midwestern US: 'All hands on deck' Restoring monarch butterfly habitat in the Midwestern US: 'All hands on deck'
The eastern migratory population of monarch butterflies (Danaus plexippus plexippus) has declined by >80% within the last two decades. One possible cause of this decline is the loss of ≥1.3 billion stems of milkweed (Asclepias spp.), which monarchs require for reproduction. In an effort to restore monarchs to a population goal established by the US Fish and Wildlife Service and adopted...
Authors
Wayne Thogmartin, Laura Lopez-Hoffman, Jason Rohweder, James E. Diffendorfer, Ryan Drum, Darius Semmens, Scott Black, Iris Caldwell, Donita Cotter, Pauline Drobney, Laura Jackson, Michael Gale, Doug Helmers, Steven Hilburger, Elizabeth Howard, Karen Oberhauser, John M. Pleasants, Brice Semmens, Orley Taylor, Patrick Ward, Jake F. Weltzin, Ruscena Wiederholt
Modelling moose–forest interactions under different predation scenarios at Isle Royale National Park, USA Modelling moose–forest interactions under different predation scenarios at Isle Royale National Park, USA
Loss of top predators may contribute to high ungulate population densities and chronic over-browsing of forest ecosystems. However, spatial and temporal variability in the strength of interactions between predators and ungulates occurs over scales that are much shorter than the scales over which forest communities change, making it difficult to characterize trophic cascades in forest...
Authors
Nathan De Jager, Jason Rohweder, Brian Miranda, Brian Sturtevant, Timothy Fox, Mark Romanski
Changes in aquatic vegetation and floodplain land cover in the Upper Mississippi and Illinois rivers (1989–2000–2010) Changes in aquatic vegetation and floodplain land cover in the Upper Mississippi and Illinois rivers (1989–2000–2010)
Quantifying changes in the cover of river-floodplain systems can provide important insights into the processes that structure these landscapes as well as the potential consequences to the ecosystem services they provide. We examined net changes in 13 different aquatic and floodplain land cover classes using photo interpreted maps of the navigable portions of the Upper Mississippi River...
Authors
Nathan De Jager, Jason Rohweder
Relating mesocarnivore relative abundance to anthropogenic land-use with a hierarchical spatial count model Relating mesocarnivore relative abundance to anthropogenic land-use with a hierarchical spatial count model
There is growing need to develop models of spatial patterns in animal abundance, yet comparatively few examples of such models exist. This is especially true in situations where the abundance of one species may inhibit that of another, such as the intensively-farmed landscape of the Prairie Pothole Region (PPR) of the central United States, where waterfowl production is largely...
Authors
Shawn Crimmins, Liza Walleser, Dan Hertel, Patrick C. McKann, Jason Rohweder, Wayne Thogmartin
The Upper Mississippi River floodscape: spatial patterns of flood inundation and associated plant community distributions The Upper Mississippi River floodscape: spatial patterns of flood inundation and associated plant community distributions
Questions How is the distribution of different plant communities associated with patterns of flood inundation across a large floodplain landscape? Location Thirty-eight thousand nine hundred and seventy hectare of floodplain, spanning 320 km of the Upper Mississippi River (UMR). Methods High-resolution elevation data (Lidar) and 30 yr of daily river stage data were integrated to produce...
Authors
Nathan De Jager, Jason Rohweder, Yao Yin, Erin Hoy
A case study of assigning conservation value to dispersed habitat units for conservation planning A case study of assigning conservation value to dispersed habitat units for conservation planning
Resource managers are increasingly tasked with developing habitat conservation plans in the face of numerous, sometimes competing, objectives. These plans must often be implemented across dispersed habitat conservation units that may contribute unequally to overall conservation objectives. Using U.S. Fish and Wildlife Service waterfowl production areas (WPA) in western Minnesota as our
Authors
Jason Rohweder, Sara C. Vacek, Shawn Crimmins, Wayne Thogmartin
Decision support system development at the Upper Midwest Environmental Sciences Center Decision support system development at the Upper Midwest Environmental Sciences Center
A Decision Support System (DSS) can be defined in many ways. The working definition used by the U.S. Geological Survey Upper Midwest Environmental Sciences Center (UMESC) is, “A spatially based computer application or data that assists a researcher or manager in making decisions.” This is quite a broad definition—and it needs to be, because the possibilities for types of DSSs are limited...
Authors
Timothy Fox, J. C. Nelson, Jason J. Rohweder
Past and predicted future changes in the land cover of the Upper Mississippi River floodplain, USA Past and predicted future changes in the land cover of the Upper Mississippi River floodplain, USA
This study provides one historical and two alternative future contexts for evaluating land cover modifications within the Upper Mississippi River (UMR) floodplain. Given previously documented changes in land use, river engineering, restoration efforts and hydro-climatic changes within the UMR basin and floodplain, we wanted to know which of these changes are the most important...
Authors
N. R. De Jager, J.J. Rohweder, J.C. Nelson
Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects
Models based upon coastal engineering equations have been developed to quantify wind fetch length and several physical wave characteristics including significant height, length, peak period, maximum orbital velocity, and shear stress. These models were used to quantify differences in proposed island construction designs for three Habitat Rehabilitation and Enhancement Projects (HREPs) in...
Authors
Jason Rohweder, James Rogala, Barry Johnson, Dennis Anderson, Steve Clark, Ferris Chamberlin