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
Decision Support Systems
A Decision Support System (DSS) can be defined in many ways. The working definition the Upper Midwest Environmental Sciences Center (UMESC) uses 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, as the possibilities for types of DSS are limited only by the user group and the developer...
Anticipated effects of development on habitat fragmentation and movement of mammals into and out of the Schoodic District, Acadia National Park, Maine
Most national parks interact with adjacent lands because their boundaries fail to encompass all regional habitats, species pools, and migration routes. Activities planned for adjacent lands can have adverse effects on park resources and visitor experiences. For example, fragmentation of adjacent habitat into smaller and more isolated remnants may influence the suitability of park habitat for a...
Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects - 2012 Update
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, modified to operate using Environmental Systems Research Institute's ArcGIS 10.0/10.1 Geographic Information System platform, were used to quantify...
Monarch Conservation Science Partnership
The Challenge Over the last two decades, the Eastern migratory population of monarch butterflies has declined by about 80%, leading many scientists to consider how to best conserve and rebuild monarch populations. Conservation efforts can be challenging to design and execute because of the multi-generational migration of monarchs that spans North America. Conservationists must consider many...
Science to Assess Future Conservation Practices for the Mississippi River Basin
USFWS Landscape Conservation Cooperatives (LCCs) throughout the Mississippi River Basin (MRB) have identified high nutrient runoff, a major contributor to Gulf hypoxia, and declines in wildlife populations (especially grassland and riparian birds), as conservation challenges requiring collaborative action. This project aimed to develop a spatial decision support system (DSS) to address...
Filter Total Items: 18
Attributes of Upper Mississippi River System contiguous forest areas Attributes of Upper Mississippi River System contiguous forest areas
To support floodplain forest research and management actions on the Upper Mississippi River System (UMRS), contiguous forested areas in the UMRS floodplain were developed and a wide range of attributes were created that define basic ecosystem conditions within such forested areas. The data allows users to query on a set of attributes (e.g., size, shape, inundation characteristics, etc…)...
Floodplain Inundation Model and Inundation Depths: Upper Mississippi and Illinois Rivers Floodplain Inundation Model and Inundation Depths: Upper Mississippi and Illinois Rivers
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), which comprises the Upper Mississippi and Illinois Rivers. Here, we present a series of related data products supporting floodplain inundation modeling of the UMRS. First, raster files comprise a unique identifier, river mile...
Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios
Most of the world’s river-floodplain ecosystems are simultaneously undergoing modifications to their hydrological regimes and experiencing species invasions, making it unclear whether invasive species are the main drivers of ecosystem change or simply responding to changes in the hydrological regime. We simulated patterns of forest recruitment and succession in a 2200 ha portion of the...
22 years of aquatic plant spatiotemporal dynamics in the Upper Mississippi River - derived spatial data (Pools 4, 8, and 13) 22 years of aquatic plant spatiotemporal dynamics in the Upper Mississippi River - derived spatial data (Pools 4, 8, and 13)
Geodatabases were developed to compile mapped relative abundance raster data sets for 25 species/species groups, and also Curve Fit regression tool adjusted R-squared, standard error, y-intercept, and slope spatial outputs for wild celery (Vallisneria americana), wild rice (Zizania aquatica) and arrowhead (one raster for the sum of Sagittaria rigida and Sagittaria latifolia) for pools 4...
Application of a Decision Support Tool for Prioritizing Restoration of Private Land Units within a Joint Northern Missouri Focal Area - derived spatial data Application of a Decision Support Tool for Prioritizing Restoration of Private Land Units within a Joint Northern Missouri Focal Area - derived spatial data
This shapefile describes the outputs from the application of a decision support tool (Rohweder and others 2015) used to assist the Northern Missouri Private Lands Program make thoughtful and strategic choices about where to spend its limited management resources. It incorporates landscape and management unit features to help prioritize management on 17 oak savanna and open woodland...
Application of a Decision Support Tool for Prioritizing Management Units at Minnesota Valley Wetland Management District - derived spatial data Application of a Decision Support Tool for Prioritizing Management Units at Minnesota Valley Wetland Management District - derived spatial data
This shapefile describes the outputs from the application of a decision support tool (Rohweder and others 2015) used to assist the Minnesota Valley Wetland Management District make thoughtful and strategic choices about where to spend its limited management resources. It incorporates landscape and management unit features to identify which Waterfowl Production Areas have the greatest...
Filter Total Items: 38
22 years of aquatic plant spatiotemporal dynamics in the upper Mississippi River 22 years of aquatic plant spatiotemporal dynamics in the upper Mississippi River
Macrophyte (aquatic plant) recovery has occurred in rivers worldwide, but assemblage patterns and habitat requirements are generally not well understood. We examined patterns of species composition and macrophyte abundance in the Upper Mississippi River (UMR), spanning 22 years of monitoring and a period of vegetation recovery. Non-metric multidimensional scaling (NMDS) ordination...
Authors
Alicia Carhart, Jason J. Rohweder, Danelle M. Larson
Understanding constraints on submersed vegetation distribution in a large, floodplain river: The role of water level fluctuations, water clarity and river geomorphology Understanding constraints on submersed vegetation distribution in a large, floodplain river: The role of water level fluctuations, water clarity and river geomorphology
Aquatic vegetation is a key component of large floodplain river ecosystems. In the Upper Mississippi River System (UMRS), there is a long-standing interest in restoring aquatic vegetation in areas where it has declined or disappeared. To better understand what constrains vegetation distribution in large river ecosystems and inform ongoing efforts to restore submersed aquatic vegetation...
Authors
Alicia Carhart, John Kalas, James T. Rogala, Jason J. Rohweder, Deanne C. Drake, Jeffrey N. Houser
Upper Mississippi River system weighted wind fetch analysis (1989, 2000, 2010/2011) Upper Mississippi River system weighted wind fetch analysis (1989, 2000, 2010/2011)
Wind fetch is defined as the unobstructed distance that wind can travel over water in a constant direction. Fetches are limited by landforms surrounding the body of water. Fetch is an important characteristic of open water because longer fetches can result in larger wind-generated waves. The larger waves, in turn, can increase shoreline erosion and sediment resuspension (Rohweder and...
Authors
Jason J. Rohweder, James T. Rogala
Climate change Is likely to alter future wolf - moose - forest interactions at Isle Royale National Park, United States Climate change Is likely to alter future wolf - moose - forest interactions at Isle Royale National Park, United States
We evaluated how climate change and variable rates of moose browsing intensity, as they relate to wolf predation, might affect the forests of Isle Royale National Park, Michigan, United States by conducting a modeling experiment. The experiment consisted of contrasting three different scenarios of wolf management and with a static (current conditions) and changing climate (high emissions...
Authors
Nathan R. De Jager, Jason J. Rohweder, Matthew J. Duveneck
Quantifying and mapping inundation regimes within a large river‐floodplain ecosystem for ecological and management applications Quantifying and mapping inundation regimes within a large river‐floodplain ecosystem for ecological and management applications
Spatial information on the distribution of ecosystem patterns and processes can be a critical component of designing and implementing effective management programs in river‐floodplain ecosystems. For example, translating how flood pulses detected within a stream gauge record are spatially manifested across a river‐valley bottom can be used to evaluate whether the current distribution of...
Authors
Molly Van Appledorn, Nathan R. De Jager, Jason J. Rohweder
A hydrogeomorphic classification of connectivity of large rivers of the Upper Midwest, United States A hydrogeomorphic classification of connectivity of large rivers of the Upper Midwest, United States
River connectivity is defined as the water-mediated exchange of matter, energy, and biota between different elements of the riverine landscape. Connectivity is an especially important concept in large-river corridors (channel plus floodplain ) because large rivers integrate fluxes of water, sediment, nutrients, contaminants, and other transported constituents emanating from large...
Authors
Robert B. Jacobson, Jason J. Rohweder, Nathan R. De Jager
Science and Products
Decision Support Systems
A Decision Support System (DSS) can be defined in many ways. The working definition the Upper Midwest Environmental Sciences Center (UMESC) uses 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, as the possibilities for types of DSS are limited only by the user group and the developer...
Anticipated effects of development on habitat fragmentation and movement of mammals into and out of the Schoodic District, Acadia National Park, Maine
Most national parks interact with adjacent lands because their boundaries fail to encompass all regional habitats, species pools, and migration routes. Activities planned for adjacent lands can have adverse effects on park resources and visitor experiences. For example, fragmentation of adjacent habitat into smaller and more isolated remnants may influence the suitability of park habitat for a...
Application of Wind Fetch and Wave Models for Habitat Rehabilitation and Enhancement Projects - 2012 Update
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, modified to operate using Environmental Systems Research Institute's ArcGIS 10.0/10.1 Geographic Information System platform, were used to quantify...
Monarch Conservation Science Partnership
The Challenge Over the last two decades, the Eastern migratory population of monarch butterflies has declined by about 80%, leading many scientists to consider how to best conserve and rebuild monarch populations. Conservation efforts can be challenging to design and execute because of the multi-generational migration of monarchs that spans North America. Conservationists must consider many...
Science to Assess Future Conservation Practices for the Mississippi River Basin
USFWS Landscape Conservation Cooperatives (LCCs) throughout the Mississippi River Basin (MRB) have identified high nutrient runoff, a major contributor to Gulf hypoxia, and declines in wildlife populations (especially grassland and riparian birds), as conservation challenges requiring collaborative action. This project aimed to develop a spatial decision support system (DSS) to address...
Filter Total Items: 18
Attributes of Upper Mississippi River System contiguous forest areas Attributes of Upper Mississippi River System contiguous forest areas
To support floodplain forest research and management actions on the Upper Mississippi River System (UMRS), contiguous forested areas in the UMRS floodplain were developed and a wide range of attributes were created that define basic ecosystem conditions within such forested areas. The data allows users to query on a set of attributes (e.g., size, shape, inundation characteristics, etc…)...
Floodplain Inundation Model and Inundation Depths: Upper Mississippi and Illinois Rivers Floodplain Inundation Model and Inundation Depths: Upper Mississippi and Illinois Rivers
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), which comprises the Upper Mississippi and Illinois Rivers. Here, we present a series of related data products supporting floodplain inundation modeling of the UMRS. First, raster files comprise a unique identifier, river mile...
Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios
Most of the world’s river-floodplain ecosystems are simultaneously undergoing modifications to their hydrological regimes and experiencing species invasions, making it unclear whether invasive species are the main drivers of ecosystem change or simply responding to changes in the hydrological regime. We simulated patterns of forest recruitment and succession in a 2200 ha portion of the...
22 years of aquatic plant spatiotemporal dynamics in the Upper Mississippi River - derived spatial data (Pools 4, 8, and 13) 22 years of aquatic plant spatiotemporal dynamics in the Upper Mississippi River - derived spatial data (Pools 4, 8, and 13)
Geodatabases were developed to compile mapped relative abundance raster data sets for 25 species/species groups, and also Curve Fit regression tool adjusted R-squared, standard error, y-intercept, and slope spatial outputs for wild celery (Vallisneria americana), wild rice (Zizania aquatica) and arrowhead (one raster for the sum of Sagittaria rigida and Sagittaria latifolia) for pools 4...
Application of a Decision Support Tool for Prioritizing Restoration of Private Land Units within a Joint Northern Missouri Focal Area - derived spatial data Application of a Decision Support Tool for Prioritizing Restoration of Private Land Units within a Joint Northern Missouri Focal Area - derived spatial data
This shapefile describes the outputs from the application of a decision support tool (Rohweder and others 2015) used to assist the Northern Missouri Private Lands Program make thoughtful and strategic choices about where to spend its limited management resources. It incorporates landscape and management unit features to help prioritize management on 17 oak savanna and open woodland...
Application of a Decision Support Tool for Prioritizing Management Units at Minnesota Valley Wetland Management District - derived spatial data Application of a Decision Support Tool for Prioritizing Management Units at Minnesota Valley Wetland Management District - derived spatial data
This shapefile describes the outputs from the application of a decision support tool (Rohweder and others 2015) used to assist the Minnesota Valley Wetland Management District make thoughtful and strategic choices about where to spend its limited management resources. It incorporates landscape and management unit features to identify which Waterfowl Production Areas have the greatest...
Filter Total Items: 38
22 years of aquatic plant spatiotemporal dynamics in the upper Mississippi River 22 years of aquatic plant spatiotemporal dynamics in the upper Mississippi River
Macrophyte (aquatic plant) recovery has occurred in rivers worldwide, but assemblage patterns and habitat requirements are generally not well understood. We examined patterns of species composition and macrophyte abundance in the Upper Mississippi River (UMR), spanning 22 years of monitoring and a period of vegetation recovery. Non-metric multidimensional scaling (NMDS) ordination...
Authors
Alicia Carhart, Jason J. Rohweder, Danelle M. Larson
Understanding constraints on submersed vegetation distribution in a large, floodplain river: The role of water level fluctuations, water clarity and river geomorphology Understanding constraints on submersed vegetation distribution in a large, floodplain river: The role of water level fluctuations, water clarity and river geomorphology
Aquatic vegetation is a key component of large floodplain river ecosystems. In the Upper Mississippi River System (UMRS), there is a long-standing interest in restoring aquatic vegetation in areas where it has declined or disappeared. To better understand what constrains vegetation distribution in large river ecosystems and inform ongoing efforts to restore submersed aquatic vegetation...
Authors
Alicia Carhart, John Kalas, James T. Rogala, Jason J. Rohweder, Deanne C. Drake, Jeffrey N. Houser
Upper Mississippi River system weighted wind fetch analysis (1989, 2000, 2010/2011) Upper Mississippi River system weighted wind fetch analysis (1989, 2000, 2010/2011)
Wind fetch is defined as the unobstructed distance that wind can travel over water in a constant direction. Fetches are limited by landforms surrounding the body of water. Fetch is an important characteristic of open water because longer fetches can result in larger wind-generated waves. The larger waves, in turn, can increase shoreline erosion and sediment resuspension (Rohweder and...
Authors
Jason J. Rohweder, James T. Rogala
Climate change Is likely to alter future wolf - moose - forest interactions at Isle Royale National Park, United States Climate change Is likely to alter future wolf - moose - forest interactions at Isle Royale National Park, United States
We evaluated how climate change and variable rates of moose browsing intensity, as they relate to wolf predation, might affect the forests of Isle Royale National Park, Michigan, United States by conducting a modeling experiment. The experiment consisted of contrasting three different scenarios of wolf management and with a static (current conditions) and changing climate (high emissions...
Authors
Nathan R. De Jager, Jason J. Rohweder, Matthew J. Duveneck
Quantifying and mapping inundation regimes within a large river‐floodplain ecosystem for ecological and management applications Quantifying and mapping inundation regimes within a large river‐floodplain ecosystem for ecological and management applications
Spatial information on the distribution of ecosystem patterns and processes can be a critical component of designing and implementing effective management programs in river‐floodplain ecosystems. For example, translating how flood pulses detected within a stream gauge record are spatially manifested across a river‐valley bottom can be used to evaluate whether the current distribution of...
Authors
Molly Van Appledorn, Nathan R. De Jager, Jason J. Rohweder
A hydrogeomorphic classification of connectivity of large rivers of the Upper Midwest, United States A hydrogeomorphic classification of connectivity of large rivers of the Upper Midwest, United States
River connectivity is defined as the water-mediated exchange of matter, energy, and biota between different elements of the riverine landscape. Connectivity is an especially important concept in large-river corridors (channel plus floodplain ) because large rivers integrate fluxes of water, sediment, nutrients, contaminants, and other transported constituents emanating from large...
Authors
Robert B. Jacobson, Jason J. Rohweder, Nathan R. De Jager