JC Nelson
Mississippi River Basin Science Coordinator
Science and Products
Publications
Filter Total Items: 26
Fatty acid composition at the base of aquatic food webs is influenced by habitat type and watershed land use Fatty acid composition at the base of aquatic food webs is influenced by habitat type and watershed land use
Spatial variation in food resources strongly influences many aspects of aquatic consumer ecology. Although large-scale controls over spatial variation in many aspects of food resources are well known, others have received little study. Here we investigated variation in the fatty acid (FA) composition of seston and primary consumers within (i.e., among habitats) and among tributary...
Authors
James H. Larson, William B. Richardson, Brent C. Knights, Lynn Bartsch, Michelle Bartsch, J. C. Nelson, Jason A. Veldboom, Jonathan M. Vallazza
Rivermouth alteration of agricultural impacts on consumer tissue δ15N Rivermouth alteration of agricultural impacts on consumer tissue δ15N
Terrestrial agricultural activities strongly influence riverine nitrogen (N) dynamics, which is reflected in the δ15N of riverine consumer tissues. However, processes within aquatic ecosystems also influence consumer tissue δ15N. As aquatic processes become more important terrestrial inputs may become a weaker predictor of consumer tissue δ15N. In a previous study, this terrestrial...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
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
An exploratory investigation of the landscape-lake interface: Land cover controls over consumer N and C isotopic composition in Lake Michigan rivermouths An exploratory investigation of the landscape-lake interface: Land cover controls over consumer N and C isotopic composition in Lake Michigan rivermouths
Rivermouth ecosystems are areas where tributary waters mix with lentic near-shore waters and provide habitat for many Laurentian Great Lakes fish and wildlife species. Rivermouths are the interface between terrestrial activities that influence rivers and the ecologically important nearshore. Stable isotopes of nitrogen (N) and carbon (C) in consumers were measured from a range of...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS
No abstract available.
Authors
J.C. Nelson, M.G. Fox, M. G. Knutson, J.R. Sauer, W.E. Thogmartin
Geologic map of the Silver Cloud mine, Elko County, Nevada Geologic map of the Silver Cloud mine, Elko County, Nevada
No abstract available.
Authors
John M. Nelson, Doak C. Cox
Prospecting for uranium with car-mounted equipment Prospecting for uranium with car-mounted equipment
No abstract available.
Authors
John M. Nelson
Reconnaissance of radioactive rocks of Maine Reconnaissance of radioactive rocks of Maine
The state of Maine was traversed with car-mounted Geiger-Mueller equipment in the late summer of 1948 and the radioactivity of approximately 4,600 miles of road was logged. All samples were analyzed, both in the field by comparing the radioactivity of each sample to the radioactivity of a stranded measured with a simple scaling modification of a portable counter, and in the Geological...
Authors
John M. Nelson, Perry F. Narten
Characteristics of marine uranium-bearing sedimentary rocks Characteristics of marine uranium-bearing sedimentary rocks
Many marine sedimentary black shale and phosphorite formations contain 0.01 to 0.02 percent uranium, and one, the alum shale of Sweden, contains as much as 0.5 percent. The published fact that uranium is already being recovered on a laboratory scale from Swedish deposits forcefully suggests that similar deposits in the United States and possibly many other countries may prove to be an...
Authors
Vincent E. McKelvey, John Marshall Nelson
Prospecting for uranium with car-mounted equipment Prospecting for uranium with car-mounted equipment
No abstract available.
Authors
John M. Nelson
Trace elements reconnaissance in Indiana, Illinois, Missouri, Arkansas, and Kentucky : preliminary report Trace elements reconnaissance in Indiana, Illinois, Missouri, Arkansas, and Kentucky : preliminary report
No abstract available.
Authors
John Marshall Nelson, Edward V. Stratton
Radioactivity of asphaltites, coals, and shales in Tennessee, Kentucky, West Virginia, and Pennsylvania Radioactivity of asphaltites, coals, and shales in Tennessee, Kentucky, West Virginia, and Pennsylvania
No abstract available.
Authors
John Marshall Nelson
Data Management
Technology
Science and Products
Publications
Filter Total Items: 26
Fatty acid composition at the base of aquatic food webs is influenced by habitat type and watershed land use Fatty acid composition at the base of aquatic food webs is influenced by habitat type and watershed land use
Spatial variation in food resources strongly influences many aspects of aquatic consumer ecology. Although large-scale controls over spatial variation in many aspects of food resources are well known, others have received little study. Here we investigated variation in the fatty acid (FA) composition of seston and primary consumers within (i.e., among habitats) and among tributary...
Authors
James H. Larson, William B. Richardson, Brent C. Knights, Lynn Bartsch, Michelle Bartsch, J. C. Nelson, Jason A. Veldboom, Jonathan M. Vallazza
Rivermouth alteration of agricultural impacts on consumer tissue δ15N Rivermouth alteration of agricultural impacts on consumer tissue δ15N
Terrestrial agricultural activities strongly influence riverine nitrogen (N) dynamics, which is reflected in the δ15N of riverine consumer tissues. However, processes within aquatic ecosystems also influence consumer tissue δ15N. As aquatic processes become more important terrestrial inputs may become a weaker predictor of consumer tissue δ15N. In a previous study, this terrestrial...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
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
An exploratory investigation of the landscape-lake interface: Land cover controls over consumer N and C isotopic composition in Lake Michigan rivermouths An exploratory investigation of the landscape-lake interface: Land cover controls over consumer N and C isotopic composition in Lake Michigan rivermouths
Rivermouth ecosystems are areas where tributary waters mix with lentic near-shore waters and provide habitat for many Laurentian Great Lakes fish and wildlife species. Rivermouths are the interface between terrestrial activities that influence rivers and the ecologically important nearshore. Stable isotopes of nitrogen (N) and carbon (C) in consumers were measured from a range of...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS
No abstract available.
Authors
J.C. Nelson, M.G. Fox, M. G. Knutson, J.R. Sauer, W.E. Thogmartin
Geologic map of the Silver Cloud mine, Elko County, Nevada Geologic map of the Silver Cloud mine, Elko County, Nevada
No abstract available.
Authors
John M. Nelson, Doak C. Cox
Prospecting for uranium with car-mounted equipment Prospecting for uranium with car-mounted equipment
No abstract available.
Authors
John M. Nelson
Reconnaissance of radioactive rocks of Maine Reconnaissance of radioactive rocks of Maine
The state of Maine was traversed with car-mounted Geiger-Mueller equipment in the late summer of 1948 and the radioactivity of approximately 4,600 miles of road was logged. All samples were analyzed, both in the field by comparing the radioactivity of each sample to the radioactivity of a stranded measured with a simple scaling modification of a portable counter, and in the Geological...
Authors
John M. Nelson, Perry F. Narten
Characteristics of marine uranium-bearing sedimentary rocks Characteristics of marine uranium-bearing sedimentary rocks
Many marine sedimentary black shale and phosphorite formations contain 0.01 to 0.02 percent uranium, and one, the alum shale of Sweden, contains as much as 0.5 percent. The published fact that uranium is already being recovered on a laboratory scale from Swedish deposits forcefully suggests that similar deposits in the United States and possibly many other countries may prove to be an...
Authors
Vincent E. McKelvey, John Marshall Nelson
Prospecting for uranium with car-mounted equipment Prospecting for uranium with car-mounted equipment
No abstract available.
Authors
John M. Nelson
Trace elements reconnaissance in Indiana, Illinois, Missouri, Arkansas, and Kentucky : preliminary report Trace elements reconnaissance in Indiana, Illinois, Missouri, Arkansas, and Kentucky : preliminary report
No abstract available.
Authors
John Marshall Nelson, Edward V. Stratton
Radioactivity of asphaltites, coals, and shales in Tennessee, Kentucky, West Virginia, and Pennsylvania Radioactivity of asphaltites, coals, and shales in Tennessee, Kentucky, West Virginia, and Pennsylvania
No abstract available.
Authors
John Marshall Nelson
Data Management
Technology