James Larson
James Larson
Science and Products
Filter Total Items: 20
Biofouling and mussel growth from mussels deployed in Great Lakes embayments (2013-2016) Biofouling and mussel growth from mussels deployed in Great Lakes embayments (2013-2016)
Many taxa of North American unionid mussels are imperiled due to biofouling by invasive dreissenid mussels. Here, we report on biofouling rates of unionid mussels suspended in cages during the growing season in nearshore embayments in Lake Erie (2013-2016), Lake Michigan (Green Bay 2016, Grand Traverse Bay 2015) and Lake Huron (Saginaw Bay 2015). Mussels were deployed in early summer...
Temperature and invertebrate community composition at nearshore Great Lakes sites, 2013-2016 (ver. 2.0, April 2025) Temperature and invertebrate community composition at nearshore Great Lakes sites, 2013-2016 (ver. 2.0, April 2025)
Data on ambient water temperatures and invertebrate community composition from ~40 sites in the western basin of Lake Erie, Saginaw Bay (Lake Huron), Grand Traverse Bay (Lake Michigan) and Green Bay (Lake Michigan). These samples were collected as part of a study on spatial variation in ecosystem processes.
Code associated with analysis and modeling of benthic and pelagic inorganic nutrient processing rates at the interface between a river and lake Code associated with analysis and modeling of benthic and pelagic inorganic nutrient processing rates at the interface between a river and lake
In this data release the authors have code and 'data' that are used to model how sediment flux and water column processing of soluble reactive phosphorus (SRP), ammonium (NH4/NHX) and nitrate (NOX). The file 'README.md' contains background information on how to access and use the data and code files.
Data Release Sediment and water column flux data from the Fox Rivermouth (Green Bay, WI; 2017) Data Release Sediment and water column flux data from the Fox Rivermouth (Green Bay, WI; 2017)
These are data associated with water column incubation experiments performed in the Fox rivermouth. The Fox River is a Lake Michigan tributary that enters Green Bay. These experiments are used to measure the transformation of inorganic and total dissolved nutrients occurring in the surface water of the rivermouth. Experiments had light and dark treatments, and some experiments were...
Mercury and water level fluctuations in lakes of northern Minnesota - sampling site land cover and inundated area data Mercury and water level fluctuations in lakes of northern Minnesota - sampling site land cover and inundated area data
These data tables summarize land cover classifications, slope measurements, and inundated area estimates for several lakes in northern Minnesota, as part of a larger project seeking to identify associations between young-of-year Yellow Perch mercury content and water level metrics, temperature, and annual deposition data in a multivariate analysis. One table presents inundated area...
Data for dam passage analysis of bigheaded carps in Pools 15-19 of the upper Mississippi River during 2014-2017 Data for dam passage analysis of bigheaded carps in Pools 15-19 of the upper Mississippi River during 2014-2017
Acoustic telemetry data (Vemco, Inc) were collected on invasive silver carp (Hypophthalmichthys molitrix), bighead carp (H. nobilis) and their hybrids in the upper Mississippi River (navigation pools 15-19) to determine movement patterns and preferred habitats during September 2013 through November 2017. We consolidated these data into intervals of fish within-pool residency and...
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
Biofouling of a unionid mussel by dreissenid mussels in nearshore zones of the Great Lakes Biofouling of a unionid mussel by dreissenid mussels in nearshore zones of the Great Lakes
In North America, native unionid mussels are imperiled due to factors such as habitat degradation, pollution, and invasive species. One of the most substantial threats is that posed by dreissenid mussels, which are invasive mussels that attach to hard substrates including unionid shells and can restrict movement and feeding of unionids. This dreissenid mussel biofouling of unionids...
Authors
James H. Larson, Sean Bailey, Mary Anne Evans
Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
In the last year, we became aware that data used in our above-referenced manuscript from 2018 published in Limnology and Oceanography contained significant errors. In the 2018 manuscript, we found that indices of secondary production were negatively correlated to indices of cyanobacterial abundance and toxicity. Unfortunately, one of our indices of cyanobacterial abundance (biovolume)...
Authors
James H. Larson, Mary Anne Evans, Robert J Kennedy, Sean Bailey, Keith A. Loftin, Zachary R. Laughrey, Robin A. Femmer, Jeff S. Schaeffer, William B. Richardson, T.T. Wynne, John C. Nelson, Joseph W. Duris
Environmental drivers of cyanobacterial abundance and cyanotoxin production in backwaters of the Upper Mississippi River Environmental drivers of cyanobacterial abundance and cyanotoxin production in backwaters of the Upper Mississippi River
High densities of cyanobacteria in aquatic ecosystems can cause impacts to ecosystem services because they serve as a poor-quality food resource, produce toxins and can indirectly cause a variety of other negative impacts to water quality. There are many hypotheses about the potential environmental drivers of variation in cyanobacterial abundance and toxicity, but these hypotheses have...
Authors
Shawn M. Giblin, James H. Larson, Jeremy D. King
Episodic nutrient addition affects water column nutrient processing rates in river-to-lake transitional zones Episodic nutrient addition affects water column nutrient processing rates in river-to-lake transitional zones
Storm-driven nutrient loading from tributaries can fuel eutrophication in nearshore and open water areas of lentic ecosystems. However, nutrient processing in river-to-lake transitional zones can substantially alter the amount and composition of nutrients transported to lakes from upstream surface waters. We measured the removal of nutrients and dissolved organic carbon (DOC) from the...
Authors
Nolan J.T. Pearce, James H. Larson, Mary Anne Evans, Paul C. Frost, Marguerite A. Xenopoulos
Timing and hydrological conditions associated with bigheaded carp movement past navigation dams on the upper Mississippi river Timing and hydrological conditions associated with bigheaded carp movement past navigation dams on the upper Mississippi river
As the range of non-native bigheaded carps (Hypophthalmichthys spp.) continues to expand throughout river systems of the United States, managers are tasked with preventing or slowing the spread of these invasive species. Main stem navigation dams on the upper Mississippi River, long considered a deterrent to fish migration, may slow or prevent the spread of invasive fish species. As...
Authors
Jonathan M. Vallazza, Kayle J. Mosel, David M. Reineke, Ann L. Runstrom, James H. Larson, Brent C. Knights
Benthic and planktonic inorganic nutrient processing rates at the interface between a river and lake Benthic and planktonic inorganic nutrient processing rates at the interface between a river and lake
The interface between lotic and lentic ecosystems is often a zone of intense metabolic activity, as primary production in streams and rivers can be light limited whereas nutrients often limit primary production in lake ecosystems. Our objective was to model the influence that rivermouths (the lotic-lentic interface) could have on the loads of soluble reactive phosphorus (SRP) and...
Authors
James H. Larson, Mary Anne Evans, Faith A. Fitzpatrick, Paul C. Frost, Marguerite A. Xenopoulos, William F. James, Paul C. Reneau
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
Biofouling and mussel growth from mussels deployed in Great Lakes embayments (2013-2016) Biofouling and mussel growth from mussels deployed in Great Lakes embayments (2013-2016)
Many taxa of North American unionid mussels are imperiled due to biofouling by invasive dreissenid mussels. Here, we report on biofouling rates of unionid mussels suspended in cages during the growing season in nearshore embayments in Lake Erie (2013-2016), Lake Michigan (Green Bay 2016, Grand Traverse Bay 2015) and Lake Huron (Saginaw Bay 2015). Mussels were deployed in early summer...
Temperature and invertebrate community composition at nearshore Great Lakes sites, 2013-2016 (ver. 2.0, April 2025) Temperature and invertebrate community composition at nearshore Great Lakes sites, 2013-2016 (ver. 2.0, April 2025)
Data on ambient water temperatures and invertebrate community composition from ~40 sites in the western basin of Lake Erie, Saginaw Bay (Lake Huron), Grand Traverse Bay (Lake Michigan) and Green Bay (Lake Michigan). These samples were collected as part of a study on spatial variation in ecosystem processes.
Code associated with analysis and modeling of benthic and pelagic inorganic nutrient processing rates at the interface between a river and lake Code associated with analysis and modeling of benthic and pelagic inorganic nutrient processing rates at the interface between a river and lake
In this data release the authors have code and 'data' that are used to model how sediment flux and water column processing of soluble reactive phosphorus (SRP), ammonium (NH4/NHX) and nitrate (NOX). The file 'README.md' contains background information on how to access and use the data and code files.
Data Release Sediment and water column flux data from the Fox Rivermouth (Green Bay, WI; 2017) Data Release Sediment and water column flux data from the Fox Rivermouth (Green Bay, WI; 2017)
These are data associated with water column incubation experiments performed in the Fox rivermouth. The Fox River is a Lake Michigan tributary that enters Green Bay. These experiments are used to measure the transformation of inorganic and total dissolved nutrients occurring in the surface water of the rivermouth. Experiments had light and dark treatments, and some experiments were...
Mercury and water level fluctuations in lakes of northern Minnesota - sampling site land cover and inundated area data Mercury and water level fluctuations in lakes of northern Minnesota - sampling site land cover and inundated area data
These data tables summarize land cover classifications, slope measurements, and inundated area estimates for several lakes in northern Minnesota, as part of a larger project seeking to identify associations between young-of-year Yellow Perch mercury content and water level metrics, temperature, and annual deposition data in a multivariate analysis. One table presents inundated area...
Data for dam passage analysis of bigheaded carps in Pools 15-19 of the upper Mississippi River during 2014-2017 Data for dam passage analysis of bigheaded carps in Pools 15-19 of the upper Mississippi River during 2014-2017
Acoustic telemetry data (Vemco, Inc) were collected on invasive silver carp (Hypophthalmichthys molitrix), bighead carp (H. nobilis) and their hybrids in the upper Mississippi River (navigation pools 15-19) to determine movement patterns and preferred habitats during September 2013 through November 2017. We consolidated these data into intervals of fish within-pool residency and...
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
Biofouling of a unionid mussel by dreissenid mussels in nearshore zones of the Great Lakes Biofouling of a unionid mussel by dreissenid mussels in nearshore zones of the Great Lakes
In North America, native unionid mussels are imperiled due to factors such as habitat degradation, pollution, and invasive species. One of the most substantial threats is that posed by dreissenid mussels, which are invasive mussels that attach to hard substrates including unionid shells and can restrict movement and feeding of unionids. This dreissenid mussel biofouling of unionids...
Authors
James H. Larson, Sean Bailey, Mary Anne Evans
Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
In the last year, we became aware that data used in our above-referenced manuscript from 2018 published in Limnology and Oceanography contained significant errors. In the 2018 manuscript, we found that indices of secondary production were negatively correlated to indices of cyanobacterial abundance and toxicity. Unfortunately, one of our indices of cyanobacterial abundance (biovolume)...
Authors
James H. Larson, Mary Anne Evans, Robert J Kennedy, Sean Bailey, Keith A. Loftin, Zachary R. Laughrey, Robin A. Femmer, Jeff S. Schaeffer, William B. Richardson, T.T. Wynne, John C. Nelson, Joseph W. Duris
Environmental drivers of cyanobacterial abundance and cyanotoxin production in backwaters of the Upper Mississippi River Environmental drivers of cyanobacterial abundance and cyanotoxin production in backwaters of the Upper Mississippi River
High densities of cyanobacteria in aquatic ecosystems can cause impacts to ecosystem services because they serve as a poor-quality food resource, produce toxins and can indirectly cause a variety of other negative impacts to water quality. There are many hypotheses about the potential environmental drivers of variation in cyanobacterial abundance and toxicity, but these hypotheses have...
Authors
Shawn M. Giblin, James H. Larson, Jeremy D. King
Episodic nutrient addition affects water column nutrient processing rates in river-to-lake transitional zones Episodic nutrient addition affects water column nutrient processing rates in river-to-lake transitional zones
Storm-driven nutrient loading from tributaries can fuel eutrophication in nearshore and open water areas of lentic ecosystems. However, nutrient processing in river-to-lake transitional zones can substantially alter the amount and composition of nutrients transported to lakes from upstream surface waters. We measured the removal of nutrients and dissolved organic carbon (DOC) from the...
Authors
Nolan J.T. Pearce, James H. Larson, Mary Anne Evans, Paul C. Frost, Marguerite A. Xenopoulos
Timing and hydrological conditions associated with bigheaded carp movement past navigation dams on the upper Mississippi river Timing and hydrological conditions associated with bigheaded carp movement past navigation dams on the upper Mississippi river
As the range of non-native bigheaded carps (Hypophthalmichthys spp.) continues to expand throughout river systems of the United States, managers are tasked with preventing or slowing the spread of these invasive species. Main stem navigation dams on the upper Mississippi River, long considered a deterrent to fish migration, may slow or prevent the spread of invasive fish species. As...
Authors
Jonathan M. Vallazza, Kayle J. Mosel, David M. Reineke, Ann L. Runstrom, James H. Larson, Brent C. Knights
Benthic and planktonic inorganic nutrient processing rates at the interface between a river and lake Benthic and planktonic inorganic nutrient processing rates at the interface between a river and lake
The interface between lotic and lentic ecosystems is often a zone of intense metabolic activity, as primary production in streams and rivers can be light limited whereas nutrients often limit primary production in lake ecosystems. Our objective was to model the influence that rivermouths (the lotic-lentic interface) could have on the loads of soluble reactive phosphorus (SRP) and...
Authors
James H. Larson, Mary Anne Evans, Faith A. Fitzpatrick, Paul C. Frost, Marguerite A. Xenopoulos, William F. James, Paul C. Reneau
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