A5068090302- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Hydrology and Watershed Management Studies
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Arctic and Antarctic ice dynamics
- Myxozoan Parasites in Aquatic Species
- Soil and Water Nutrient Dynamics
- Water Quality and Resources Studies
- Species Distribution and Climate Change
- Transboundary Water Resource Management
- Climate change and permafrost
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
The Ohio State University
2024
Utah State University
2020-2023
Kansas State University
2016-2021
Abstract Understanding global ecological patterns and processes, from biogeochemical to biogeographical, requires broad‐scale macrosystems context for comparing contrasting ecosystems. Climate gradients (precipitation temperature) other continental‐scale shape freshwater environments due their influences on terrestrial direct indirect effects the abiotic biotic characteristics of lakes, streams, wetlands. We combined literature review, analyses open access data, logical argument assess...
Abstract Dryland stream fishes are adapted to highly connected habitats with unpredictable hydrologic conditions, including frequent low flows and sometimes extreme drought. The flow recruitment hypothesis predicts that some spawn in main channel during when water temperatures prey densities high. However, drought periods might be disruptive even among whose life histories otherwise benefit from lower flows. We studied dynamics of six (family Cyprinidae) at 15 sites a fragmented Great Plains...
Fishways are a common tool for mitigating the effects of habitat fragmentation on fish, but their utility in low-gradient, sand-bed rivers Great Plains is not well studied. The Lincoln Street Fishway Arkansas River became operational 2015 and was built specifically to pass small-bodied threatened fishes. We compared current historical surveys up- downstream barrier test effect fishway community structure conducted tagging experiments ability fishes move into through fishway. Differences...
Abstract Dams can be operated to mimic components of the natural flow regime minimise impacts on downstream ecosystems. However, infrastructure, societal needs, water management, and catchment runoff constrain which when attributes mimicked. We compared fish assemblage responses, including native non‐native species, over 2 decades managed environmental flows those in a river retaining relatively unaltered regime. Both these arid‐land rivers are within overallocated Colorado River basin have...
Abstract Unforeseen interactions of dams and declining water availability have formed new obstacles to recovering endemic endangered big‐river fishes. During a recent trend drying climate reservoir levels in the Southwestern United States, large waterfall has on two separate occasions (1989–1995 2001–present) transition zone between San Juan River Lake Powell because deposited sediments. Since recovery plans for large‐bodied fish species, razorback sucker ( Xyrauchen texanus ) Colorado...
Abstract Passive integrated transponder tags are a common method used in fish ecology research, and their feasibility for use has been well studied salmonids. Several studies suggest that effects of PIT tagging may be species dependent these should addressed prior to conducting large‐scale studies. In series laboratory experiments, we tested factors influencing survival tag retention Southern Redbelly Dace Chrosomus erythrogaster . the first experiment, tagger length on over 30 d dace tagged...
Abstract Reservoirs and associated river fragments are novel ecosystems not experienced by fishes in their evolutionary history, yet they now commonplace across the globe. Understanding how use these habitats is vital to conservation efforts contemporary riverscapes. Movement patterns of endangered razorback sucker ( Xyrauchen texanus ) synthesized from tagging upper Colorado River basin, USA, illustrate applications technology data sharing multiple agencies better understand spatial ecology...
Instream barriers can constrain dispersal of nonnative fishes, creating opportunities to test their impact on native communities above and below these barriers. Deposition sediments in a river inflow Lake Powell, USA resulted creation large waterfall prohibiting upstream movement fishes from the reservoir allowing us evaluate trophic niche this barrier. We expected overlap among species would increase local assemblages downstream barrier where fish diversity abundance were higher. Fishes had...
Abstract Aim Migratory freshwater fishes are those that must access discrete habitats to complete their life cycles. Freshwater fish migrations occur around the world and provide numerous ecosystem services for humans natural systems; however, many migratory species in decline globally. A limiting factor successfully conserve is histories of unknown or only partially described. To researchers with critical comprehensive information fishes, we developed North American Fish Database (NAFMFD)....
Abstract Fragmentation isolates individuals and restricts access to valuable habitat with severe consequences for populations, such as reduced gene flow, disruption of recolonization dynamics, resiliency disturbance, changes in aquatic community structure. Translocations mitigate the effects fragmentation loss are common, but few rigorously evaluated, particularly fishes. Over six years, we translocated 1215 four species imperiled fish isolated below a barrier on San Juan River, Utah, USA,...
Abstract Background Unfettered movement among habitats is crucial for fish to access patchily distributed resources and complete their life cycle, but many riverscapes in the American Southwest are fragmented by dams dewatering. The endangered Rio Grande silvery minnow ( Hybognathus amarus, RGSM) persists a remnant of its former range (ca. 5%), ecology understudied. Methods We tracked movements hatchery-reared RGSM, tagged with passive integrated transponder tags, using stationary mobile...
The Peppered Chub Macrhybopsis tetranema was once found throughout the Arkansas River basin in portions of Texas, New Mexico, Oklahoma, Kansas, and Colorado. Range-wide declines both abundance distribution have occurred over past three decades coinciding with habitat loss fragmentation. Over last decade or more, only two geographically isolated populations persisted Ninnescah rivers Kansas a portion Canadian Mexico Texas. Intensive sampling between 2011 2013 documented decline this species...
Abstract Human transformation of aquatic systems and the introduction nonnative species increasingly threaten persistence imperiled freshwater fishes. In response, large‐scale mechanical removal fishes has been implemented throughout parts Colorado River basin to aid recovery endangered fishes, but effects these efforts can be difficult quantify. Fisheries population models for predicting outcomes harvest regulations have widely used prevent overfishing commercial game stocks. Here, we...
Abstract The establishment of nonnative predators can have devastating consequences for native fish communities, but predation rates are often difficult to quantify due spatial and temporal variation in predator foraging behavior. Predation by Channel Catfish Ictalurus punctatus throughout the Colorado River basin potentially threatens recovery fishes. Because highly opportunistic feeders, an understanding how piscivory this species impacts prey populations should help guide management...
Abstract Water development has threatened the ecological integrity of riverine ecosystems. Increasing water demand, persistent drought, and climate change exacerbate effects habitat degradation loss in altered systems such as Colorado River basin. Today, biologists are challenged to identify management actions that benefit native fishes while not hindering or management. Herein, we discuss importance natural flow regime for functioning ecosystems provide examples from four tributaries Green...
Abstract Animals contribute significantly to nutrient cycling through excretion, but most studies consider their effects under relatively benign abiotic conditions. Disturbances such as drought may alter animals’ contributions shifts in species composition and biomass. Headwater streams are particularly vulnerable extreme climate events thus might show rapid changes stream biota ecosystem effects. We tested how biomass subsequent (nutrient cycling) of an intermittent prairie community...
Abstract River‐reservoir interfaces have been described as aquatic ecotones and contain strong environmental gradients of depth, turbidity trophic resource abundance. These transitional habitats traditionally excluded by riverine reservoir management schemes despite their prevalence in modern riverscapes. By systematically sampling shoreline along a river‐reservoir interface gradient from to lacustrine zones with trammel nets 2018–2019, patterns were identified total species captured...
Abstract Flow alteration and riparian vegetation encroachment are causing habitat simplification with severe consequences for native fishes. To assess the effectiveness of enhancing simplified in a large dryland river, we experimentally added invasive wood at 19 paired treatment reference (no added) subreaches (50–100 m) within main channel San Juan River. Using before‐after‐control‐impact design, sampled fishes macroinvertebrates, quantified complexity. After addition, total fish densities...
Abstract Herbivorous fish can have strong effects on stream ecosystem function by consuming primary producers and excreting limiting nutrients, but it is unclear whether they are resource limited. Thus, understanding factors regulating abundance of these might help predict function. We used mesocosms to test populations central stoneroller Campostoma anomalum exhibit density dependence across a range typical densities found in Great Plains streams. predicted that incrementally increasing...
Abstract Lakes are vulnerable to climate change, and warming rates in the Arctic faster than anywhere on Earth. Fishes sensitive changing temperatures, which directly control physiological processes. Food availability should partly dictate responses change because energetic demands with temperature, but few studies have simultaneously examined temperature food availability. We used a fully factorial experiment test effects of (7.6, 12.7, 17.4°C; 50 days) growth, consumption, respiration,...