A5084408550- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Gender Politics and Representation
- Japanese History and Culture
- Fish Ecology and Management Studies
- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
- Social Policy and Reform Studies
- Chinese history and philosophy
- Fecal contamination and water quality
- Hydrology and Sediment Transport Processes
- Groundwater flow and contamination studies
- Water Quality and Pollution Assessment
- Ecology and biodiversity studies
- Constructed Wetlands for Wastewater Treatment
- Electoral Systems and Political Participation
- Labor Movements and Unions
- Soil erosion and sediment transport
- Political Systems and Governance
- Botany and Plant Ecology Studies
- Historical Gender and Feminism Studies
- Social Media and Politics
- Political Philosophy and Ethics
- Tourism, Volunteerism, and Development
Upper Midwest Water Science Center
2024
United States Geological Survey
2024
Michigan State University
2009-2023
Luther University
2021-2023
Délégation Paris 6
2022
United States Department of State
2021
Cornell University
2004-2012
Michigan Department of Natural Resources
2007-2011
Significance New microbial source-tracking tools can be used to elucidate important nonpoint sources of water quality degradation and potential human health risks at large scales. Pollution arising from septic system discharges is likely more than previously realized. Identifying these providing reference levels for provides a basis assess trends ultimately remediate degraded areas.
To improve our understanding of lake landscape position, we compared four metrics based on different aspects surface hydrologic connections: (1) "lake hydrology," which is a general measure (2) order," measures connections to streams by stream order, (3) network number," other lakes, and (4) complexity," the complexity lakes (in chain or branched). We sampled 71 in northern Michigan, U.S.A. measured position characteristics around each (e.g., land use/cover geology) answer two questions:...
Environmental challenges are complex and require expertise from multiple disciplines. Consequently, there is growing interest in interdisciplinary environmental research that integrates natural social science, an often arduous undertaking. We surveyed researchers interested experienced at the human—environment interface to assess perspectives on research. Integrative has eluded many of our respondents, whose efforts better described as additive multidisciplinary The respondents identified...
Legacy effects of past land use and disturbance are increasingly recognized, yet consistent definitions criteria for defining them do not exist. To address this gap in biological- ecosystem-assessment frameworks, we propose a general metric evaluating potential legacy effects, which computed by normalizing altered system function persistence with duration disturbance. We also two distinct legacy-effect categories: signal from lags transport structural physical landscape changes. Using flux...
Abstract Nutrient management is an essential part of watershed planning worldwide to protect water resources from both widespread landscape inputs nutrients (N and P) point source emissions. To provide information regional planners better understand nutrient sources, we developed the Spatially Explicit Source Estimate Map (SENSEmap) quantify individual sources N P at their entry points in landscape. We modeled seven six across U.S. Great Lakes Basin 30‐m resolution: atmospheric deposition,...
Abstract Water quality has suffered as humans have increased nutrient inputs across the landscape. In many cases, management actions to reduce not been met with concomitant ecosystem responses. These missed expectations are partly due continued slow delivery of nutrient-enriched groundwater pre-dating input reductions resulting from actions. Land use legacies expressed through this time lag important quantify in order adjust expectations. We present a novel coupling nitrogen source maps...
Accurate and robust approaches for quantifying regional reference conditions are critical to the management restoration of freshwater resources. We considered developed streams, lakes, or wetlands either biological chemical waterbody features review 4 common conditions: multimetric, multivariate, landscape-context statistical modeling, paleolimnology. focused on major steps in decision-making process that led most appropriate approach. Based this synthesis, we argue there is a need (1) more...
Nitrate ingested from drinking water has been linked to adverse health outcomes (e.g., cancer, birth defects) at levels as low ∼2 mg/L NO3-N, far below the regulatory limits of 10 mg/L. In many areas, groundwater is a common source and may contain elevated nitrate, but limited data on patterns concentrations are available. Using an extensive set over 100,000 nitrate well samples, we developed new maps 76,724 wells in Michigan's Lower Peninsula, USA for 2006-2015 period. Kriging,...
We investigated land use and cover (LULC) effects, i.e., effects that perpetuate beyond an expected or perceived temporal endpoint, on the chemistry of 35 lakes in Huron River Watershed, Michigan. Temporal changes five time steps LULC were represented by principal components, which entered hierarchically into a multiple regression to predict water chemistry. compared model fit using Akaike weights, predictive ability R 2 , for models representing from single up included all steps. The...
The effects of manure application in agriculture on surface water quality has become a local to global problem because the adverse consequences public health and food security. This study evaluated (i) spatial distribution bovine (cow) porcine (pig) genetic fecal markers, (ii) how hydrologic factors influenced these (iii) their variations as function land use, nutrients, other physiochemical factors. We collected 189 samples from 63 watersheds Michigan's Lower Peninsula during baseflow,...
This study presents a synthesis of the hydrogeology in U.S. Lake Superior watershed and contribution groundwater to water budget basin. Much shoreline Minnesota Michigan is composed hydrogeologic units contributing very little direct discharge lake. Groundwater watersheds adjacent lake typically flows short, local flow systems characterized by thin glacial sediments with active fractured bedrock within top 60–90 m below land surface. The complex system Wisconsin's Bayfield Peninsula has...
Independent voters currently exceed fifty percent of the Japanese electorate and hold potential to realign party system. Yet, Liberal Democratic Party continues capture largest share votes. We find that continued success LDP challenges new conservative parties face can be attributed fact former draw support from a firm base organized supporters while latter must harness energies unorganized independent voters. However, disorganization does not suggest cannot defined as distinct group with...
Introduction - the Editors. THE NATIONAL LEVEL. Reforming Liberal Democratic Party E.S. Krauss and R. Pekkanen. Campaign Behavior: The Limits to Change D. Dabney. Dietmembers Seat Inheritance: Keeping It in Family N. Taniguchi. Policy Preferences Platforms: What Voters Want vs. Get G. Steel. Bureaucracy E. Kawabata. LOCAL Women Their Place: Penetrating Male-Dominated Urban Rural Assemblies S.L. Martin. Persistently Uncompetitive Elections for Prefectural Weiner. Potential of Antiparty...
Nitrogen and phosphorus pollution is of great concern to aquatic life human well-being. While most these nutrients are applied the landscape, little known about complex interplay among nutrient applications, transport attenuation processes, coastal loads. Here, we enhance apply Spatially Explicit Nutrient Source Estimate Flux model (SENSEflux) simulate total annual nitrogen loads from US Great Lakes Basin coastline, identify delivery hotspots, estimate relative contributions different...
Analyses of past national election studies have categorized male independents as alienated and strategic, while women are apolitical apathetic. These same analyses led to a wide acceptance the strong relationship between resource mobilization changes in political attitudes voting behaviour. This paper revisits this early characterization voters assess extent which increased access education economic resources since late 1970s has narrowed gap men women, producing equal rates who strategic....
Despite the widely acknowledged public health impacts of surface water fecal contamination, there is limited understanding seasonal effects on (i) fate and transport processes (ii) mechanisms by which they contribute to quality impairment. Quantifying relationships between land use, chemical parameters, bacterial concentrations in watersheds can help guide monitoring control microbial explain differences. The goals this study were identify differences Escherichia coli Bacteroides...