A5008062801- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Isotope Analysis in Ecology
- Hydrology and Sediment Transport Processes
- Climate change and permafrost
- Ecology and Vegetation Dynamics Studies
- Ecology and biodiversity studies
- Environmental Toxicology and Ecotoxicology
- Fish biology, ecology, and behavior
- Marine and coastal ecosystems
- Marine and fisheries research
- Rangeland and Wildlife Management
- Disaster Response and Management
- Insect symbiosis and bacterial influences
- Conservation, Biodiversity, and Resource Management
- Environmental DNA in Biodiversity Studies
- Species Distribution and Climate Change
- Mosquito-borne diseases and control
- Hydrology and Watershed Management Studies
- Parasite Biology and Host Interactions
- Fire effects on ecosystems
- Flood Risk Assessment and Management
- Peatlands and Wetlands Ecology
- Mercury impact and mitigation studies
Southern Illinois University Carbondale
2012-2024
Minnesota Department of Natural Resources
2015-2024
Ecological Society of America
2017
John Wiley & Sons (United States)
2017
Abstract Invasive species represent a threat to aquatic ecosystems globally; however, impacts can be heterogenous across systems. Documented of invasive zebra mussels ( Dreissena polymorpha ) and spiny water fleas Bythotrephes cederströmii ; hereafter on native fishes are variable context dependent locations time periods. Here, we use hierarchical Bayesian analysis 35-year dataset two fish from 9 lakes demonstrate that early life growth ecologically important influenced by these species....
Analyses of 21 15 N stable isotope tracer experiments, designed to examine food web dynamics in streams around the world, indicated that isotopic composition resources assimilated by primary consumers (mostly invertebrates) poorly reflected presumed sources. Modeling only 33–50% available sampled sources such as decomposing leaves, epilithon, and fine particulate detritus over feeding periods weeks or more. Thus, common methods sampling consumed animals do not sufficiently reflect pool they...
Abstract Background Large-river decision-makers are charged with maintaining diverse ecosystem services through unprecedented social-ecological transformations as climate change and other global stressors intensify. The interconnected, dendritic habitats of rivers, which often demarcate jurisdictional boundaries, generate complex management challenges. Here, we explore how the Resist–Accept–Direct (RAD) framework may enhance large-river by promoting coordinated deliberate responses to...
Summary Taxonomic and functional diversity in freshwater habitats is rapidly declining, but we know little about how such declines will ultimately affect ecosystems. Neotropical streams are currently experiencing massive losses of amphibians, with many linked to the chytrid fungus, Batrachochytrium dendrobatidis ( Bd ). We examined ecological consequences disease‐driven loss amphibians from a Panamanian stream. quantified basal resources, macroinvertebrates, N uptake fluxes through food‐web...
Studies of trophic-level material and energy transfers are central to ecology. The use isotopic tracers has now made it possible measure trophic transfer efficiencies important nutrients better understand how these materials move through food webs. We analyzed data from thirteen 15 N-ammonium tracer addition experiments quantify N basal resources animals in headwater streams with varying physical, chemical, biological features. primary uptake compartments (PUCs; heterotrophic microorganisms...
Zebra mussels (Dreissena polymorpha) are invasive species that alter ecosystems and food webs with the potential to affect aquatic mercury cycling bioaccumulation in fishes, although effect of zebra on fish tissue has not been tested inland lakes. We assessed differences concentrations Minnesota lakes without while controlling for other lake watershed characteristics. Mercury adult walleye (Sander vitreus) yellow perch (Perca flavescens) were 72 % 157 higher, respectively, containing...
Abstract Fish kill investigations are critical to understanding threats aquatic ecosystems and can serve as a measure of environmental disruption well an early indicator emerging disease. The goal this study was analyze historical data related such events among wild fish populations in Minnesota order assess the quality completeness potential trends kills. After excluding with incomplete (e.g., which location not reported), we analyzed 225 unique kills from 2003 2013 that were recorded two...
Abstract Species invasions are a leading threat to ecosystems globally, but our understanding of interactions among multiple invasive species and their outcomes on ecosystem properties is undeveloped despite significance conservation management. Here we studied large lake in Minnesota, USA, that experienced simultaneous surge zebra mussel spiny water flea populations. A long-term (2000–2018) dataset offered rare opportunity assess whole-ecosystem shifts following the co-invasion. Within two...
Conversion to agriculture, habitat fragmentation, and the loss of native grazers have made tallgrass prairie one most endangered ecosystems. One management option for remaining parcels, patch-burn grazing (PBG), applies a controlled burn portion attract cattle, creating mosaic more- less-grazed patches. Although beneficial cattle grassland birds, potential impacts PBG on streams not been studied, holistic approach is needed ensure against adverse effects. We used Before-After-Control-Impact...
Abstract Understanding the ecological function of developed large rivers remains elusive because these systems have long been altered for multiple uses. In particular, floodplains rivers, such as Mississippi River, contained behind extensive levees. A historic flood occurred in lower River system during spring 2011, prompting US Army Corps Engineers to activate Bird's Point‐New Madrid floodway, a 55 000‐ha, agriculturally dominated, leveed area. Water entered floodway at flows >1 m s −1...
Abstract The spiny water flea ( Bythotrephes cederströmii ), a freshwater crustacean considered to be the world’s best-studied invasive zooplankter, was first recorded in North America Laurentian Great Lakes during 1980s. Its arrival is widely result of ocean-going cargo ships that translocated contaminated ballast from Eurasia 1970–1980s. subsequent discovery species inland lakes consistent with hypothesis propagules dispersed initially established populations. Here we present evidence...
ABSTRACT Flow is a critical factor determining the riverine ecosystem structure and function. Widespread hydrologic alteration, however, has impacted ecological integrity of rivers in ways that are not well understood, including responses biological communities to increasingly frequent severe climatic disturbances. Our study compared invertebrate on woody debris large flooding extreme drought two highly contrasting segments an impaired low‐gradient river. The upstream segment, which...