A5043284895- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Water Quality and Resources Studies
- Freshwater macroinvertebrate diversity and ecology
- Wildlife-Road Interactions and Conservation
- Isotope Analysis in Ecology
- Aquatic Invertebrate Ecology and Behavior
- American Environmental and Regional History
- Economic and Environmental Valuation
- Marine and coastal ecosystems
- Water resources management and optimization
- Wildlife Ecology and Conservation
- Soil erosion and sediment transport
- Water Governance and Infrastructure
- Hydraulic flow and structures
- Wastewater Treatment and Nitrogen Removal
- Environmental Conservation and Management
- Flood Risk Assessment and Management
- Cross-Border Cooperation and Integration
- Phosphorus and nutrient management
- Coastal wetland ecosystem dynamics
- Ecology and biodiversity studies
Wisconsin Department of Natural Resources
2013-2024
King County Department of Natural Resources and Parks
2020-2022
Hudson Institute
2018
John Wiley & Sons (United States)
2018
University of Wisconsin–Madison
2005-2014
Aarhus University
2005
Wright State University
2005
Abstract The role of competition in forbidding similar species from co‐occurring has long been debated. A difficulty identifying this repulsion is that share environmental requirements and hence show an attraction to communities where these are met. To disentangle opposing patterns, we use phylogenetic relatedness as objective metric similarities. Studying 11 sunfishes (Centrarchidae) 890 lakes, first no pattern the raw community data. We then regressed sunfish presence/absence against seven...
In many large ecosystems, conservation projects are selected by a diverse set of actors operating independently at spatial scales ranging from local to international. Although small-scale decision making can leverage expert knowledge, it also may be an inefficient means achieving large-scale objectives if piecemeal efforts poorly coordinated. Here, we assess the value coordinating in both space and time maximize restoration aquatic ecosystem connectivity. Habitat fragmentation is leading...
Non-point source loading of nitrogen and phosphorus is a primary cause eutrophication inland waters, although the diffuse variable nature nutrient inputs makes it difficult to trace identify pathways. Stable isotope values (δ15N) in aquatic biota are thought reflect anthropogenic inputs, they may be promising tool for tracing sources watersheds. We measured δ15N consumers from suite 27 Danish lakes spanning range trophic states (oligotrophic eutrophic) land uses (forest, urban, agriculture)....
The nitrogen stable isotope ratio of biological tissue has been proposed as an indicator anthropogenic N inputs to aquatic ecosystems, but overlap in the isotopic signatures various sources and transformations make definitive attribution processes difficult. We collected primary consumer invertebrates from streams agricultural settings Wisconsin, U.S.A., evaluate relative influence animal manure, inorganic fertilizer, denitrification on biotic delta15N. Variance delta15N was explained by...
Understanding how and why lakes vary respond to different drivers through time space is needed understand, predict, manage freshwater quality in an era of rapidly changing land use climate. Water clarity regulates many characteristics aquatic ecosystems responsive watershed features, making it a sentinel environmental change. However, whether precipitation alters the relative importance features that influence lake water or spatial scales at which they operate unknown. We used data set...
Abstract Water resources and transportation infrastructure such as dams culverts provide countless socio‐economic benefits; however, this can also disconnect the movement of organisms, sediment, water through river ecosystems. Trade‐offs associated with these competing costs benefits occur globally, applications in barrier addition (e.g. dam road construction), reengineering culvert repair), removal aging infrastructure). Barrier prioritization provides a unique opportunity to: (i) restore...
Abstract Road crossings can act as barriers to the movement of stream fishes, resulting in habitat fragmentation, reduced population resilience environmental disturbance and higher risks extinction. Strategic barrier removal has potential improve connectivity networks, but managers lack a consistent framework for determining which projects will most benefit target species. The objective this study is develop method identifying prioritizing action on road order restore network connectivity....
Summary The presence of dams, stream–road crossings and other infrastructure often compromises the connectivity rivers, leading to reduced fish abundance diversity. assessment mitigation river barriers is critical success restoration efforts aimed at restoring integrity. In this study, we present a combined modelling approach involving statistical regression methods mixed integer linear programming maximize resident species richness within catchment through targeted barrier mitigation....
Structures that block movement of fish through river networks are built to serve a variety societal needs, including transportation, hydroelectric power, and exclusion exotic species. Due their abundance, road crossings dams reduce the amount habitat available migrate from sea or lakes into rivers breed. The benefits removing any particular barrier depends on its location within network, passability fish, relative position other barriers network. Balancing trade‐offs between ecological...
Abstract Aim Our goal was to predict road culvert passability, as defined by outlet drop and water velocity, for three fish swimming groups using remotely collected environmental variables that have been shown influence the passability of culverts. Locatio Laurentian Great Lakes Basin, north‐eastern North America, on Canada– USA border. Methods We generated four boosted regression tree models, one each velocities, predicted probability impassable culverts low‐order streams (Strahler 1‐4)...
Controlling invasive species is critical for conservation but can have unintended consequences native and divert resources away from other efforts. This dilemma occurs on a grand scale in the North American Great Lakes, where dams culverts block tributary access to habitat of desirable fish are lynchpin long-standing efforts limit ecological damage inflicted by invasive, parasitic sea lamprey (Petromyzon marinus). Habitat restoration sea-lamprey control create conflicting goals managing...
Abstract A hallmark of industrialization is the construction dams for water management and roads transportation, leading to fragmentation aquatic ecosystems. Many nations are striving address both maintenance backlogs mitigation environmental impacts as their infrastructure ages. Here, we test whether accounting road repair needs could offer opportunities boost conservation efficiency by piggybacking connectivity restoration projects on maintenance. Using optimization models align fish...
Abstract Traditional hydraulically designed culverts impede ecological connectivity and degrade aquatic ecosystems. This problem is compounded by their ubiquity in the built environment. To overcome these limitations, alternative designs have been created to facilitate natural conditions restore connectivity. However, “ecological design” perceived fiscal limitations that prevented widespread implementation consequently hampered conservation remediation of stream ecosystems important for...
Stream restoration projects often aim to benefit aquatic biota and frequently use the reappearance of sensitive nongame fish species as a measure success. However, mitigation human influence will only given where static habitat characteristics are suitable for that potential source populations within range their dispersal capability. We used spatial autoregressive models simulate effect watershed-scale stream on distributions six sediment-sensitive in Wisconsin, USA, streams. These consider...
Watersheds deliver numerous pollutants to the coastline of oceans and lakes, thereby jeopardizing ecosystem services. Regulatory frameworks for stressors often focus on loading rates without accounting physical dynamics receiving water body. Here, we use a three-dimensional hydrodynamic model simulate transport generic tributary-delivered anthropogenic pollutant within Lake Michigan based location timing loading. Simulating plumes from 11 rivers, their intersections with coastal services,...
Robertson DM, Diebel MW. 2020. Importance of accurately quantifying internal loading in developing phosphorus reduction strategies for a chain shallow lakes. Lake Reserv Manage. 36:391–411. The Winnebago Pool is 4 lakes Wisconsin. Because high external (P) inputs to the lakes, became highly eutrophic, with much P contained their sediments. In total maximum daily load (TMDL) these it important determine how concentrations should respond changes loading. many TMDLs, assumed be negligible or...