James Larson
James Larson
Science and Products
Filter Total Items: 20
Hydrogeochemical mixing data from Lake Michigan tributaries 2011 Hydrogeochemical mixing data from Lake Michigan tributaries 2011
This dataset describes the hydrogeomorphic structure and lake-tributary mixing in three intermediate-sized Lake Michigan rivermouths: Ford River, Manitowoc River, and Pere Marquette River. Data were collected from May to October 2011. Water chemistry variables were measured with a multiparameter sonde along longitudinal, lateral, and vertical transects. Magnesium, boron, and stable water...
Ecological Process Monitoring in the Western Basin Lake Erie, 2013. Ecological Process Monitoring in the Western Basin Lake Erie, 2013.
This dataset includes information collected from âecological process monitoring stationsâ? located across the western basin of Lake Erie (originating at the Maumee River and reaching as far east as the Bass Islands). Nine worksheets are included in this file, of which 1 is a meta-data sheet that describes the variable names and purpose of the other sheets. Included herein is the...
Filter Total Items: 54
Mercury and water level management in lakes of northern Minnesota Mercury and water level management in lakes of northern Minnesota
Water level (WL) fluctuations substantially alter the fauna, flora, and microbial community of nearshore aquatic ecosystems. Water level management therefore has the potential to strongly influence a wide variety of ecosystem processes. Many northern temperate lake food webs experience substantial methylmercury contamination, which is partially mediated by the action of sulfate-reducing...
Authors
James H. Larson, Ryan P. Maki, Victoria Christensen, Enrika Hlavacek, Mark B. Sandheinrich, Jaime F. LeDuc, Claire Kissane, Brent C. Knights
Stoichiometric ecotoxicology for a multisubstance world Stoichiometric ecotoxicology for a multisubstance world
Nutritional and contaminant stressors influence organismal physiology, trophic interactions, community structure, and ecosystem-level processes; however, the interactions between toxicity and elemental imbalance in food resources have been examined in only a few ecotoxicity studies. Integrating well-developed ecological theories that cross all levels of biological organization can...
Authors
Angela Peace, Paul C. Frost, Nicole D. Wagner, Michael Danger, Chiara Accolla, Philipp Antczak, Bryan W. Brooks, David M. Costello, Rebecca A. Everett, Kevin B. Flores, Christopher M. Heggerud, Roxanne Karimi, Yun Kang, Yang Kuang, James H. Larson, Teresa Mathews, Gregory D. Mayer, Justin N. Murdock, Cheryl A. Murphy, Roger M. Nisbet, Laure Pecquerie, Nathan Pollesch, Erica M. Rutter, Kimberly L. Schultz, J. Thad Scott, Louise Stevenson, Hao Wang
Land use effects on sediment nutrient processes in a heavily modified watershed using structural equation models Land use effects on sediment nutrient processes in a heavily modified watershed using structural equation models
Contemporary land use can affect sediment nutrient processes in rivers draining heavily modified watersheds; however, studies linking land use to sediment nutrient processes in large river networks are limited. In this study, we developed and evaluated structural equation models (SE models) for denitrification and phosphorus retention capacity to determine direct and indirect linkages...
Authors
Rebecca M. Kreiling, Martin C. Thoms, Lynn A. Bartsch, James H. Larson, Victoria Christensen
Preliminary analysis to estimate the spatial distribution of benefits of P load reduction: Identifying the spatial influence of phosphorus loading from the Maumee River (USA) in western Lake Erie Preliminary analysis to estimate the spatial distribution of benefits of P load reduction: Identifying the spatial influence of phosphorus loading from the Maumee River (USA) in western Lake Erie
Since the early 2000s, Lake Erie has been experiencing annual cyanobacterial blooms that often cover large portions of the western basin and even reach into the central basin. These blooms have affected several ecosystem services provided by Lake Erie to surrounding communities (notably drinking water quality). Several modeling efforts have identified the springtime total bioavailable...
Authors
James H. Larson, Enrika Hlavacek, Nathan R. De Jager, Mary Anne Evans, Timothy Wynne
Phosphorus, nitrogen and dissolved organic carbon fluxes from sediments in freshwater rivermouths entering Green Bay (Lake Michigan; USA) Phosphorus, nitrogen and dissolved organic carbon fluxes from sediments in freshwater rivermouths entering Green Bay (Lake Michigan; USA)
Transitional areas between ecosystem types are often active biogeochemically due to resource limitation changes. Lotic-to-lentic transitions in freshwaters appear active biogeochemically, but few studies have directly measured nutrient processing rates to assess whether processing within the rivermouth is important for load estimates or the local communities. We measured oxic fluxes of...
Authors
James H. Larson, William F. James, Faith A. Fitzpatrick, Paul C. Frost, Mary Anne Evans, Paul C. Reneau, Marguerite A. Xenopoulos
Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River
Similarity in community composition declines as distance between locations increases, a phenomenon that has been observed in a wide variety of freshwater, marine and terrestrial ecosystems. One driver of the distance-similarity relationship is the presence of environmental gradients that alter the suitability of sites for particular species. Although some environmental gradients, such as...
Authors
James H. Larson, Jonathan M. Vallazza, Brent C. Knights
Science and Products
Filter Total Items: 20
Hydrogeochemical mixing data from Lake Michigan tributaries 2011 Hydrogeochemical mixing data from Lake Michigan tributaries 2011
This dataset describes the hydrogeomorphic structure and lake-tributary mixing in three intermediate-sized Lake Michigan rivermouths: Ford River, Manitowoc River, and Pere Marquette River. Data were collected from May to October 2011. Water chemistry variables were measured with a multiparameter sonde along longitudinal, lateral, and vertical transects. Magnesium, boron, and stable water...
Ecological Process Monitoring in the Western Basin Lake Erie, 2013. Ecological Process Monitoring in the Western Basin Lake Erie, 2013.
This dataset includes information collected from âecological process monitoring stationsâ? located across the western basin of Lake Erie (originating at the Maumee River and reaching as far east as the Bass Islands). Nine worksheets are included in this file, of which 1 is a meta-data sheet that describes the variable names and purpose of the other sheets. Included herein is the...
Filter Total Items: 54
Mercury and water level management in lakes of northern Minnesota Mercury and water level management in lakes of northern Minnesota
Water level (WL) fluctuations substantially alter the fauna, flora, and microbial community of nearshore aquatic ecosystems. Water level management therefore has the potential to strongly influence a wide variety of ecosystem processes. Many northern temperate lake food webs experience substantial methylmercury contamination, which is partially mediated by the action of sulfate-reducing...
Authors
James H. Larson, Ryan P. Maki, Victoria Christensen, Enrika Hlavacek, Mark B. Sandheinrich, Jaime F. LeDuc, Claire Kissane, Brent C. Knights
Stoichiometric ecotoxicology for a multisubstance world Stoichiometric ecotoxicology for a multisubstance world
Nutritional and contaminant stressors influence organismal physiology, trophic interactions, community structure, and ecosystem-level processes; however, the interactions between toxicity and elemental imbalance in food resources have been examined in only a few ecotoxicity studies. Integrating well-developed ecological theories that cross all levels of biological organization can...
Authors
Angela Peace, Paul C. Frost, Nicole D. Wagner, Michael Danger, Chiara Accolla, Philipp Antczak, Bryan W. Brooks, David M. Costello, Rebecca A. Everett, Kevin B. Flores, Christopher M. Heggerud, Roxanne Karimi, Yun Kang, Yang Kuang, James H. Larson, Teresa Mathews, Gregory D. Mayer, Justin N. Murdock, Cheryl A. Murphy, Roger M. Nisbet, Laure Pecquerie, Nathan Pollesch, Erica M. Rutter, Kimberly L. Schultz, J. Thad Scott, Louise Stevenson, Hao Wang
Land use effects on sediment nutrient processes in a heavily modified watershed using structural equation models Land use effects on sediment nutrient processes in a heavily modified watershed using structural equation models
Contemporary land use can affect sediment nutrient processes in rivers draining heavily modified watersheds; however, studies linking land use to sediment nutrient processes in large river networks are limited. In this study, we developed and evaluated structural equation models (SE models) for denitrification and phosphorus retention capacity to determine direct and indirect linkages...
Authors
Rebecca M. Kreiling, Martin C. Thoms, Lynn A. Bartsch, James H. Larson, Victoria Christensen
Preliminary analysis to estimate the spatial distribution of benefits of P load reduction: Identifying the spatial influence of phosphorus loading from the Maumee River (USA) in western Lake Erie Preliminary analysis to estimate the spatial distribution of benefits of P load reduction: Identifying the spatial influence of phosphorus loading from the Maumee River (USA) in western Lake Erie
Since the early 2000s, Lake Erie has been experiencing annual cyanobacterial blooms that often cover large portions of the western basin and even reach into the central basin. These blooms have affected several ecosystem services provided by Lake Erie to surrounding communities (notably drinking water quality). Several modeling efforts have identified the springtime total bioavailable...
Authors
James H. Larson, Enrika Hlavacek, Nathan R. De Jager, Mary Anne Evans, Timothy Wynne
Phosphorus, nitrogen and dissolved organic carbon fluxes from sediments in freshwater rivermouths entering Green Bay (Lake Michigan; USA) Phosphorus, nitrogen and dissolved organic carbon fluxes from sediments in freshwater rivermouths entering Green Bay (Lake Michigan; USA)
Transitional areas between ecosystem types are often active biogeochemically due to resource limitation changes. Lotic-to-lentic transitions in freshwaters appear active biogeochemically, but few studies have directly measured nutrient processing rates to assess whether processing within the rivermouth is important for load estimates or the local communities. We measured oxic fluxes of...
Authors
James H. Larson, William F. James, Faith A. Fitzpatrick, Paul C. Frost, Mary Anne Evans, Paul C. Reneau, Marguerite A. Xenopoulos
Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River Estimating the degree to which distance and temperature differences drive changes in fish community composition over time in the upper Mississippi River
Similarity in community composition declines as distance between locations increases, a phenomenon that has been observed in a wide variety of freshwater, marine and terrestrial ecosystems. One driver of the distance-similarity relationship is the presence of environmental gradients that alter the suitability of sites for particular species. Although some environmental gradients, such as...
Authors
James H. Larson, Jonathan M. Vallazza, Brent C. Knights