James Larson
James Larson
Science and Products
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Before-after, control-impact analysis of evidence for the impacts of water level on Walleye, Northern Pike and Yellow Perch in lakes of the Rainy-Namakan complex (MN, USA and ON, CA) Before-after, control-impact analysis of evidence for the impacts of water level on Walleye, Northern Pike and Yellow Perch in lakes of the Rainy-Namakan complex (MN, USA and ON, CA)
Water level (WL) fluctuations in lakes influence many aspects of ecosystem processes. Concern about the potential impact of WL fluctuations on fisheries was one of the factors that motivated the decision in 2000 to alter the management of WL in the Rainy-Namakan reservoir complex (on the border between the U.S. state of Minnesota and the Canadian province of Ontario). We used a Before...
Authors
James H. Larson, Ryan P. Maki, Benjamin A. Vondra, Kevin E. Peterson
Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
Large lakes provide a variety of ecological services to surrounding cities and communities. Many of these services are supported by ecological processes that are threatened by the increasing prevalence of cyanobacterial blooms which occur as aquatic ecosystems experience cultural eutrophication. Over the past 10 yr, Lake Erie experienced cyanobacterial blooms of increasing severity and...
Authors
James H. Larson, Mary Anne Evans, Robert J. Kennedy, Sean Bailey, Keith A. Loftin, Zachary R. Laughrey, Robin Femmer, Jeff Schaeffer, William B. Richardson, Timothy Wynne, J. C. Nelson, Joseph W. Duris
Evidence of Asian carp spawning upstream of a key choke point in the Mississippi River Evidence of Asian carp spawning upstream of a key choke point in the Mississippi River
Bighead Carp Hypophthalmichthys nobilis, Silver Carp H. molitrix, and Grass Carp Ctenopharyngodon idella(collectively termed “Asian carp”) were introduced into North America during the 1960s and 1970s and have become established in the lower Mississippi River basin. Previously published evidence for spawning of these species in the upper Mississippi River has been limited to an area just
Authors
James H. Larson, Brent C. Knights, S. Grace McCalla, Emy Monroe, Maren T. Tuttle-Lau, Duane Chapman, Amy E. George, Jonathan M. Vallazza, Jon Amberg
Using a gradient in food quality to infer drivers of fatty acid content in two filter-feeding aquatic consumers Using a gradient in food quality to infer drivers of fatty acid content in two filter-feeding aquatic consumers
Inferences about ecological structure and function are often made using elemental or macromolecular tracers of food web structure. For example, inferences about food chain length are often made using stable isotope ratios of top predators and consumer food sources are often inferred from both stable isotopes and fatty acid (FA) content in consumer tissues. The use of FAs as tracers...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, Lynn A. Bartsch, Michelle R. Bartsch
Spatial and temporal dynamics of suspended particle characteristics and composition in Navigation Pool 19 of the Upper Mississippi River Spatial and temporal dynamics of suspended particle characteristics and composition in Navigation Pool 19 of the Upper Mississippi River
Suspended particles are an essential component of large rivers influencing channel geomorphology, biogeochemical cycling of nutrients, and food web resources. The Upper Mississippi River is a large floodplain river that exhibits pronounced spatiotemporal variation in environmental conditions and biota, providing an ideal environment for investigating dynamics of suspended particles in...
Authors
Amanda S. Milde, William B. Richardson, Eric A. Strauss, James H. Larson, Jonathan M. Vallazza, Brent C. Knights
Lake levels and water quality in comparison to fish mercury body burdens, Voyageurs National Park, Minnesota, 2013–15 Lake levels and water quality in comparison to fish mercury body burdens, Voyageurs National Park, Minnesota, 2013–15
Within Voyageurs National Park in Minnesota, lake levels are controlled by a series of dams to support a variety of uses. Previous research indicates a link between these artificially maintained water levels, referred to as rule curves, and mercury concentrations in fish owing to the drying and rewetting of wetlands and other nearshore areas, which may release methylmercury into the...
Authors
Victoria G. Christensen, James H. Larson, Ryan P. Maki, Mark B. Sandheinrich, Mark E. Brigham, Claire Kissane, Jamie F. LeDuc
Science and Products
Filter Total Items: 20
No Result Found
Filter Total Items: 54
Before-after, control-impact analysis of evidence for the impacts of water level on Walleye, Northern Pike and Yellow Perch in lakes of the Rainy-Namakan complex (MN, USA and ON, CA) Before-after, control-impact analysis of evidence for the impacts of water level on Walleye, Northern Pike and Yellow Perch in lakes of the Rainy-Namakan complex (MN, USA and ON, CA)
Water level (WL) fluctuations in lakes influence many aspects of ecosystem processes. Concern about the potential impact of WL fluctuations on fisheries was one of the factors that motivated the decision in 2000 to alter the management of WL in the Rainy-Namakan reservoir complex (on the border between the U.S. state of Minnesota and the Canadian province of Ontario). We used a Before...
Authors
James H. Larson, Ryan P. Maki, Benjamin A. Vondra, Kevin E. Peterson
Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
Large lakes provide a variety of ecological services to surrounding cities and communities. Many of these services are supported by ecological processes that are threatened by the increasing prevalence of cyanobacterial blooms which occur as aquatic ecosystems experience cultural eutrophication. Over the past 10 yr, Lake Erie experienced cyanobacterial blooms of increasing severity and...
Authors
James H. Larson, Mary Anne Evans, Robert J. Kennedy, Sean Bailey, Keith A. Loftin, Zachary R. Laughrey, Robin Femmer, Jeff Schaeffer, William B. Richardson, Timothy Wynne, J. C. Nelson, Joseph W. Duris
Evidence of Asian carp spawning upstream of a key choke point in the Mississippi River Evidence of Asian carp spawning upstream of a key choke point in the Mississippi River
Bighead Carp Hypophthalmichthys nobilis, Silver Carp H. molitrix, and Grass Carp Ctenopharyngodon idella(collectively termed “Asian carp”) were introduced into North America during the 1960s and 1970s and have become established in the lower Mississippi River basin. Previously published evidence for spawning of these species in the upper Mississippi River has been limited to an area just
Authors
James H. Larson, Brent C. Knights, S. Grace McCalla, Emy Monroe, Maren T. Tuttle-Lau, Duane Chapman, Amy E. George, Jonathan M. Vallazza, Jon Amberg
Using a gradient in food quality to infer drivers of fatty acid content in two filter-feeding aquatic consumers Using a gradient in food quality to infer drivers of fatty acid content in two filter-feeding aquatic consumers
Inferences about ecological structure and function are often made using elemental or macromolecular tracers of food web structure. For example, inferences about food chain length are often made using stable isotope ratios of top predators and consumer food sources are often inferred from both stable isotopes and fatty acid (FA) content in consumer tissues. The use of FAs as tracers...
Authors
James H. Larson, William B. Richardson, Jonathan M. Vallazza, Lynn A. Bartsch, Michelle R. Bartsch
Spatial and temporal dynamics of suspended particle characteristics and composition in Navigation Pool 19 of the Upper Mississippi River Spatial and temporal dynamics of suspended particle characteristics and composition in Navigation Pool 19 of the Upper Mississippi River
Suspended particles are an essential component of large rivers influencing channel geomorphology, biogeochemical cycling of nutrients, and food web resources. The Upper Mississippi River is a large floodplain river that exhibits pronounced spatiotemporal variation in environmental conditions and biota, providing an ideal environment for investigating dynamics of suspended particles in...
Authors
Amanda S. Milde, William B. Richardson, Eric A. Strauss, James H. Larson, Jonathan M. Vallazza, Brent C. Knights
Lake levels and water quality in comparison to fish mercury body burdens, Voyageurs National Park, Minnesota, 2013–15 Lake levels and water quality in comparison to fish mercury body burdens, Voyageurs National Park, Minnesota, 2013–15
Within Voyageurs National Park in Minnesota, lake levels are controlled by a series of dams to support a variety of uses. Previous research indicates a link between these artificially maintained water levels, referred to as rule curves, and mercury concentrations in fish owing to the drying and rewetting of wetlands and other nearshore areas, which may release methylmercury into the...
Authors
Victoria G. Christensen, James H. Larson, Ryan P. Maki, Mark B. Sandheinrich, Mark E. Brigham, Claire Kissane, Jamie F. LeDuc