Jonathan M Friedman, PhD (Former Employee)
Science and Products
Ecological Flows
This research examines how water flows affect populations, communities, ecosystems, and hydroscapes. Studies elucidate the interactions among hydrologic, geomorphologic, biogeochemical, biological, and anthropogenic processes. Scientists identify and quantify the spatial and temporal attributes of water flow for ecological needs. Flow alternations by humans are a primary contributor to the...
Model-Based Scenario Planning to Inform Climate Change Adaptation in the Northern Great Plains
One of the biggest challenges facing resource managers today is not knowing exactly when, where, and how climate change effects will unfold. While models can be used to predict the types of impacts that climate change might have on a landscape, uncertainty remains surrounding factors such as how quickly changes will occur and how specific resources will respond. In order to plan for this
Understanding the Links Between Climate, Ecosystem Processes, Wetland Management, and Bird Communities in the Prairie Pothole Region of the Northern Great Plains
In semi-arid regions, riparian and wetland ecosystems function as important migratory and breeding habitats and add significantly to local and regional biodiversity; however, these ecosystems are increasingly threatened by climate change and the potential synergistic effects of increasing demand for water and invasion by exotic species. As a continuation of our inaugural USGS National...
A network of 31 Upper Missouri River Basin naturalized water-year (Oct-Sep) streamflow reconstructions spanning years 800 - 1998 CE A network of 31 Upper Missouri River Basin naturalized water-year (Oct-Sep) streamflow reconstructions spanning years 800 - 1998 CE
Paleohydrologic records provide a valuable perspective on the variability of streamflow and hydroclimate that is critical for water resource planning and placing present day and future conditions into a long-term context. Until now, key insights gained from streamflow reconstructions in the other river basins across the Western U.S. been lacking in the Upper Missouri River Basin due to a...
Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889, 1991, 2010 and other years Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889, 1991, 2010 and other years
The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of...
Shapefiles and Historical Aerial Photographs, Little Missouri River, 1939-2010 Shapefiles and Historical Aerial Photographs, Little Missouri River, 1939-2010
The data archive contains the aerial photographs and channel delineations used in our analysis. The images have been geo-referenced to the 1995 digital orthophoto quarter quadrangles as described by Miller and Friedman (2009). The separate images for each year can be viewed as a composite along with that year's channel delineation using a geographic information system (GIS). The 2003...
Cottonwood Management at Theodore Roosevelt National Park, North Dakota Cottonwood Management at Theodore Roosevelt National Park, North Dakota
This data release consists of the following components: Sex ratio data from cottonwood trees at random points on the floodplain in the North and South units of Theodore Roosevelt National Park, ND. These data were used to investigate the effects of age, height above, and distance from the channel on mortality of male and female trees of plains cottonwood (Populus deltoides subsp...
Chaco Canyon 1930s and 2000 geospatial data Chaco Canyon 1930s and 2000 geospatial data
A study of arroyo evolution in northern New Mexico (Friedman and others, 2015) assessed geomorphic change in the Chaco Wash arroyo from the 1930s to 2000. As part of this study, in October 2000 a trench was excavated across the arroyo bottom and a high-precision (Real-time kinematic) GPS survey was conducted. GPS survey data were used to georeference a 1930s topographic map and to...
Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011 Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011
This study uses growth in vegetation during the monsoon season measured from LANDSAT imagery as a proxy for measured rainfall. NDVI values from 26 years of pre- and post-monsoon season Landsat imagery were derived across Yuma Proving Ground (YPG) in southwestern Arizona, USA. The LANDSAT imagery (1986-2011) was downloaded from USGSs GlobeVis website (http://glovis.usgs.gov/). Change in...
Filter Total Items: 102
Seasonal and species-level water-use strategies and groundwater dependence in dryland riparian woodlands during extreme drought Seasonal and species-level water-use strategies and groundwater dependence in dryland riparian woodlands during extreme drought
Drought-induced groundwater decline and warming associated with climate change are primary threats to dryland riparian woodlands. We used the extreme 2012–2019 drought in southern California as a natural experiment to assess how differences in water-use strategies and groundwater dependence may influence the drought susceptibility of dryland riparian tree species with overlapping...
Authors
Jared Williams, John C. Stella, Michael Bliss Singer, Adam M. Lambert, Steven L. Voelker, John E. Drake, Jonathan M. Friedman, Lissa Pelletier, Li Kui, Dar A. Roberts
Putting down roots: Afforestation and bank cohesion of Icelandic Rivers Putting down roots: Afforestation and bank cohesion of Icelandic Rivers
Riparian vegetation is widely recognized as a critical component of functioning fluvial systems. Human pressures on woody vegetation including riparian areas have had lasting effects, especially at high latitude. In Iceland, prior to human settlement, native downy birch woodlands covered approximately 15%–40% of the land area compared to 1%–2% today. Afforestation efforts include...
Authors
Sara L. Rathburn, Prostur Eysteinsson, Thorsteinn Saemundsson, John T. Kemper, Celeste D. Wieting, Jonathan M. Friedman
No evidence for cottonwood forest decline along a flow-augmented western U.S. river No evidence for cottonwood forest decline along a flow-augmented western U.S. river
In contrast to many other arid region rivers, streamflow in the South Platte River is heavily augmented by trans-basin water imports and irrigation return flows. Hydrological changes began in the 1880s, resulting in channel narrowing and the development of a continuous Populus-Salix forest by the mid-twentieth century. We assessed the composition, structure and regeneration status of the...
Authors
Cetan Christensen, Gabrielle L. Katz, Jonathan M. Friedman, Miranda D. Redmond, Andrew S. Norton
River channel response to invasive plant treatment across the American Southwest River channel response to invasive plant treatment across the American Southwest
Invasive riparian plants were introduced to the American Southwest in the early 19th century and contributed to regional trends of decreasing river channel width and migration rate in the 20th century. More recently, efforts to remove invasive riparian vegetation (IRV) have been widespread, especially since 1990. To what extent has IRV treatment reversed the earlier trend of channel...
Authors
Celeste Wieting, Jonathan M. Friedman, Sara L. Rathburn
Local groundwater decline exacerbates response of dryland riparian woodlands to climatic drought Local groundwater decline exacerbates response of dryland riparian woodlands to climatic drought
Dryland riparian woodlands are considered to be locally buffered from droughts by shallow and stable groundwater levels. However, climate change is causing more frequent and severe drought events, accompanied by warmer temperatures, collectively threatening the persistence of these groundwater dependent ecosystems through a combination of increasing evaporative demand and decreasing...
Authors
Jared Williams, John C Stella, Steven L. Voelker, Adam M Lambert, Lissa Pelletier, John E Drake, Jonathan M. Friedman, Dar A. Roberts, Michael B. Singer
Response of riparian vegetation to short- and long-term hydrologic variation Response of riparian vegetation to short- and long-term hydrologic variation
Increasing demand for river water now conflicts with an increasing desire to maintain riparian ecosystems. Efficiently managing river flows for riparian vegetation requires an understanding of the time scale of flow effects, but this information is limited by the absence of long-term studies of vegetation change in response to flow variation. To investigate the influence of short- and...
Authors
Jonathan M. Friedman, Abigail M. Eurich, Gregor T. Auble, Michael L. Scott, Patrick B. Shafroth, Polly P Gibson
Science and Products
Ecological Flows
This research examines how water flows affect populations, communities, ecosystems, and hydroscapes. Studies elucidate the interactions among hydrologic, geomorphologic, biogeochemical, biological, and anthropogenic processes. Scientists identify and quantify the spatial and temporal attributes of water flow for ecological needs. Flow alternations by humans are a primary contributor to the...
Model-Based Scenario Planning to Inform Climate Change Adaptation in the Northern Great Plains
One of the biggest challenges facing resource managers today is not knowing exactly when, where, and how climate change effects will unfold. While models can be used to predict the types of impacts that climate change might have on a landscape, uncertainty remains surrounding factors such as how quickly changes will occur and how specific resources will respond. In order to plan for this
Understanding the Links Between Climate, Ecosystem Processes, Wetland Management, and Bird Communities in the Prairie Pothole Region of the Northern Great Plains
In semi-arid regions, riparian and wetland ecosystems function as important migratory and breeding habitats and add significantly to local and regional biodiversity; however, these ecosystems are increasingly threatened by climate change and the potential synergistic effects of increasing demand for water and invasion by exotic species. As a continuation of our inaugural USGS National...
A network of 31 Upper Missouri River Basin naturalized water-year (Oct-Sep) streamflow reconstructions spanning years 800 - 1998 CE A network of 31 Upper Missouri River Basin naturalized water-year (Oct-Sep) streamflow reconstructions spanning years 800 - 1998 CE
Paleohydrologic records provide a valuable perspective on the variability of streamflow and hydroclimate that is critical for water resource planning and placing present day and future conditions into a long-term context. Until now, key insights gained from streamflow reconstructions in the other river basins across the Western U.S. been lacking in the Upper Missouri River Basin due to a...
Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889, 1991, 2010 and other years Photographs Showing Change in Riparian Vegetation in the Grand Canyon, 1889, 1991, 2010 and other years
The viewpoints were first photographed by Stanton in 1889, and then re-photographed in about 1991, 2010 and sometimes other years. This set of photos focuses on change in riparian vegetation and partially overlaps a larger set of Stanton viewpoints re-photographed by Webb and others and available at http://wwwpaztcn.wr.usgs.gov/fscc/stanton-repeat-photography/index.php. The file of...
Shapefiles and Historical Aerial Photographs, Little Missouri River, 1939-2010 Shapefiles and Historical Aerial Photographs, Little Missouri River, 1939-2010
The data archive contains the aerial photographs and channel delineations used in our analysis. The images have been geo-referenced to the 1995 digital orthophoto quarter quadrangles as described by Miller and Friedman (2009). The separate images for each year can be viewed as a composite along with that year's channel delineation using a geographic information system (GIS). The 2003...
Cottonwood Management at Theodore Roosevelt National Park, North Dakota Cottonwood Management at Theodore Roosevelt National Park, North Dakota
This data release consists of the following components: Sex ratio data from cottonwood trees at random points on the floodplain in the North and South units of Theodore Roosevelt National Park, ND. These data were used to investigate the effects of age, height above, and distance from the channel on mortality of male and female trees of plains cottonwood (Populus deltoides subsp...
Chaco Canyon 1930s and 2000 geospatial data Chaco Canyon 1930s and 2000 geospatial data
A study of arroyo evolution in northern New Mexico (Friedman and others, 2015) assessed geomorphic change in the Chaco Wash arroyo from the 1930s to 2000. As part of this study, in October 2000 a trench was excavated across the arroyo bottom and a high-precision (Real-time kinematic) GPS survey was conducted. GPS survey data were used to georeference a 1930s topographic map and to...
Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011 Mean of the Top Ten Percent of NDVI Values in the Yuma Proving Ground during Monsoon Season, 1986-2011
This study uses growth in vegetation during the monsoon season measured from LANDSAT imagery as a proxy for measured rainfall. NDVI values from 26 years of pre- and post-monsoon season Landsat imagery were derived across Yuma Proving Ground (YPG) in southwestern Arizona, USA. The LANDSAT imagery (1986-2011) was downloaded from USGSs GlobeVis website (http://glovis.usgs.gov/). Change in...
Filter Total Items: 102
Seasonal and species-level water-use strategies and groundwater dependence in dryland riparian woodlands during extreme drought Seasonal and species-level water-use strategies and groundwater dependence in dryland riparian woodlands during extreme drought
Drought-induced groundwater decline and warming associated with climate change are primary threats to dryland riparian woodlands. We used the extreme 2012–2019 drought in southern California as a natural experiment to assess how differences in water-use strategies and groundwater dependence may influence the drought susceptibility of dryland riparian tree species with overlapping...
Authors
Jared Williams, John C. Stella, Michael Bliss Singer, Adam M. Lambert, Steven L. Voelker, John E. Drake, Jonathan M. Friedman, Lissa Pelletier, Li Kui, Dar A. Roberts
Putting down roots: Afforestation and bank cohesion of Icelandic Rivers Putting down roots: Afforestation and bank cohesion of Icelandic Rivers
Riparian vegetation is widely recognized as a critical component of functioning fluvial systems. Human pressures on woody vegetation including riparian areas have had lasting effects, especially at high latitude. In Iceland, prior to human settlement, native downy birch woodlands covered approximately 15%–40% of the land area compared to 1%–2% today. Afforestation efforts include...
Authors
Sara L. Rathburn, Prostur Eysteinsson, Thorsteinn Saemundsson, John T. Kemper, Celeste D. Wieting, Jonathan M. Friedman
No evidence for cottonwood forest decline along a flow-augmented western U.S. river No evidence for cottonwood forest decline along a flow-augmented western U.S. river
In contrast to many other arid region rivers, streamflow in the South Platte River is heavily augmented by trans-basin water imports and irrigation return flows. Hydrological changes began in the 1880s, resulting in channel narrowing and the development of a continuous Populus-Salix forest by the mid-twentieth century. We assessed the composition, structure and regeneration status of the...
Authors
Cetan Christensen, Gabrielle L. Katz, Jonathan M. Friedman, Miranda D. Redmond, Andrew S. Norton
River channel response to invasive plant treatment across the American Southwest River channel response to invasive plant treatment across the American Southwest
Invasive riparian plants were introduced to the American Southwest in the early 19th century and contributed to regional trends of decreasing river channel width and migration rate in the 20th century. More recently, efforts to remove invasive riparian vegetation (IRV) have been widespread, especially since 1990. To what extent has IRV treatment reversed the earlier trend of channel...
Authors
Celeste Wieting, Jonathan M. Friedman, Sara L. Rathburn
Local groundwater decline exacerbates response of dryland riparian woodlands to climatic drought Local groundwater decline exacerbates response of dryland riparian woodlands to climatic drought
Dryland riparian woodlands are considered to be locally buffered from droughts by shallow and stable groundwater levels. However, climate change is causing more frequent and severe drought events, accompanied by warmer temperatures, collectively threatening the persistence of these groundwater dependent ecosystems through a combination of increasing evaporative demand and decreasing...
Authors
Jared Williams, John C Stella, Steven L. Voelker, Adam M Lambert, Lissa Pelletier, John E Drake, Jonathan M. Friedman, Dar A. Roberts, Michael B. Singer
Response of riparian vegetation to short- and long-term hydrologic variation Response of riparian vegetation to short- and long-term hydrologic variation
Increasing demand for river water now conflicts with an increasing desire to maintain riparian ecosystems. Efficiently managing river flows for riparian vegetation requires an understanding of the time scale of flow effects, but this information is limited by the absence of long-term studies of vegetation change in response to flow variation. To investigate the influence of short- and...
Authors
Jonathan M. Friedman, Abigail M. Eurich, Gregor T. Auble, Michael L. Scott, Patrick B. Shafroth, Polly P Gibson
*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