A5059893513- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Fish Biology and Ecology Studies
- Water Quality and Resources Studies
- Hydrology and Sediment Transport Processes
- Environmental DNA in Biodiversity Studies
- Marine and fisheries research
- Reproductive biology and impacts on aquatic species
- Isotope Analysis in Ecology
- Hydrology and Watershed Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Archaeology and Natural History
- Wildlife Ecology and Conservation
- Freshwater macroinvertebrate diversity and ecology
- Fish biology, ecology, and behavior
- American Environmental and Regional History
- Flood Risk Assessment and Management
- Transboundary Water Resource Management
- Identification and Quantification in Food
- Ecology and biodiversity studies
- Sex work and related issues
- Evolutionary Psychology and Human Behavior
- Diverse Aspects of Tourism Research
- Water Resources and Management
- Botany, Ecology, and Taxonomy Studies
University of Illinois Urbana-Champaign
2015-2024
University of New England
2019-2024
Illinois Department of Natural Resources
2016-2022
Illinois Archaeological Survey
2011-2020
University of Illinois Chicago
2017
Shedd Aquarium
2017
University of Nebraska–Lincoln
2012-2015
Grand Valley State University
2011
Abstract Invasive species can produce complex and unpredictable effects across multiple trophic levels through a combination of direct indirect pathways. silver carp ( Hypophthalmichthys molitrix ) exert substantial pressure on the link between primary production intermediate in large rivers Midwestern USA . The goal our manuscript was to describe population invasion Illinois River (Illinois, explore potential native biota. We obtained 22 years data from three long‐term monitoring programmes...
Rivers are increasingly used as superhighways for the continental-scale transportation of freight goods, but ecological impact large vessel traffic on river ecosystems is difficult to study. Recently, temporary maintenance closure lock and dam systems Illinois Waterway (USA) brought commercial a halt along river's length, offering rare opportunity study response ecosystem before, during, after an extended pause this persistent anthropogenic disturbance. We observed improvements in main-...
The twentieth century spanned an era that included nadirs in environmental quality and subsequent efforts to improve ecological conditions. Illinois Waterway, a large river system Illinois, experienced prolonged degradation followed by dramatic recovery. In the 1950s, standardized sampling program was initiated has continued for six decades. resulting record documents profound changes, demonstrating potential ecosystems recover following successful implementation of large-scale policies,...
ABSTRACT Declining participation in recreational angling is of great concern to fishery managers because fishing license sales are an important revenue source for protection aquatic resources. This decline frequently attributed, part, increased societal reliance on electronics. Internet use by anglers increasing and may the as a unique means increase angler participation. We examined search behavior using Google Insights Search, free online tool that summarizes searches from 2004 2011...
Abstract Large riverine landscapes are among the most productive ecosystems on earth, and affected by humans. Few studies explicitly explore effects of, or responses to, multiple stressors in highly modified large river systems. Changes fish assemblages response to anthropogenic were explored from a 60‐year data set for Illinois River (Illinois, USA). Despite legacy of stressors, responded additional especially four distinct stressor phases, which included two policies improve water quality...
Abstract Understanding the environmental factors that regulate fish recruitment is essential for effective management of fisheries. Generally, first‐year survival, and therefore recruitment, inherently less consistent in systems with high intra‐ interannual variability. Irrigation reservoirs display sporadic patterns annual drawdown, which can pose a substantial challenge to fishes. We developed species‐specific models using an 18‐year data set compiled from state federal agencies...
Reservoirs can be dynamic systems, often prone to unpredictable and extreme water-level fluctuations, environments where survival is difficult for zooplankton larval fish. Although numerous studies have examined the effects of reservoir drawdown on water quality, few both abiotic biotic characteristics. A fissure in dam at Red Willow Reservoir southwest Nebraska necessitated an drawdown; level was lowered more than 6 m during a two-month period, reducing volume by 76%. During subsequent...
Some fish are important dispersal vectors of aquatic plants (i.e., ichthyochory), yet few examples have been documented outside the Neotropics. Although highly modified and degraded, upper Illinois River Waterway supports common carp (Cyprinus carpio) populations abundant vegetation. As previously to consume vegetation seeds, we assessed diets determine potential for function as seeds that may be restoration rivers floodplain wetlands. Whole occurred at a high frequency 42 seed taxa were...
This document describes the methodological evolution of Long-Term Illinois Rivers Fish Population Monitoring Program since its inception. The principal changes include a shift from fixed-site sampling to stratified random at reach scale benefit statistical robustness and concurrent AC electrofishing pulsed-DC increase breadth diversity size classes fishes encountered. These in methodology were implemented during 2016 field season are based on quantitative assessments program data other...
Abstract Smallmouth buffalo ( Ictiobus bubalus Rafinesque) are a large-bodied fish highly valued and commercially exploited across most of their range. Despite this, relatively little is known population demographics compared to other species. To fill these knowledge gaps, we analyzed two independent long-term datasets (30 57 years, respectively) demographic data (age structure, growth, mortality, age at maturity, recruitment) from multiple pools the Upper Mississippi River System (UMRS)...
Abstract Sampling in non‐wadeable rivers presents methodological challenges for monitoring fish species. Changing environmental conditions may affect the ability to accurately capture species (i.e., detection) and consequently lead inappropriate inferences on occupancy rates. We used hierarchical Bayesian multiseason mixture models estimate detection of 41 52 Kankakee River, Illinois, by using data from a standardized program. Fish were sampled with AC boat electrofishing shoreline seining...
Anthropogenic activities have greatly altered the natural flow regime of lotic ecosystems in many ways, including dams and culverts, which restrict sediment transport fragment fish habitat. Sculpins, Cottus spp., are an important food-web link between macroinvertebrates larger stream fishes affected by culverts. Results from a previous study indicate substantial increase relative abundance mottled sculpin, bairdii, was observed upstream renovated road-stream crossing during first season...
Abstract Most of the world's large river ecosystems are subject to multiple anthropogenic stressors including climate change, disconnection between main channel and floodplain, flow regulation, land‐use modification. Viewed through a resilience lens, these potentially in new regime, exhibiting different structure, function, set feedbacks. We investigated trophic status food web character response over 150 years Illinois River. Differences stable isotope ratios, community niche space, basal...
Abstract Determining the factors that influence recruitment to sequential ontogenetic stages is critical for understanding dynamics of fish and effective management sportfish, particularly in dynamic unpredictable environments. We sampled walleye ( Sander vitreus ) white bass Morone chrysops at 3 (age 0 during spring: ‘age‐0 larval’; age autumn: juvenile’; 1 ‘age‐1 juvenile’) from reservoirs. developed multiple linear regression models describe influencing age‐0 larval, juvenile age‐1...
Intersex condition (ooctyes in testicular tissue) has been documented many watersheds among a diverse variety of fishes worldwide. However, few studies have tested for the occurrence from rivers American Midwest. Midwestern watersheds, such as Illinois River Waterway, U.S.A. may provide important new information about effects endocrine disrupting chemicals (EDCs) on because urban, industrial, and agricultural land uses within watersheds. A first step study EDCs any ecosystem is survey to...
Resident fish exhibited higher short-term resiliency than did non-resident to a 100 y flood in low-gradient stream. In Jun. 2008, substantial (400% mean daily discharge) occurred the Big Manistee River watershed Michigan. Pre- and post-flood communities were sampled at two sites on Bear Creek, 4th order tributary of River. One site was dominated by sand; second gradient large woody debris fine gravel. At both sites, similar pre-flood (Morisita's Index (Im) ≈ 0.8), especially for resident (Im...
Differing life-history strategies may act as a constraint on reproductive expression that ultimately limits the ability of individual species to respond changes in magnitude or frequency environmental variation, and potentially underlies variation often inherent phenotypic evolved responses anthropogenic change. Alternatively, if there are cues predict potential, differential represent differences adaptive capacity optimize current value given conditions. We compared several aspects walleye...