A5023692486- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Marine and fisheries research
- Hydrology and Watershed Management Studies
- Fish biology, ecology, and behavior
- Ecology and biodiversity studies
- Wildlife Ecology and Conservation
- Water Quality and Resources Studies
- Freshwater macroinvertebrate diversity and ecology
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Soil erosion and sediment transport
- Animal Behavior and Reproduction
- Genetic diversity and population structure
- Soil and Water Nutrient Dynamics
- Amphibian and Reptile Biology
- Transboundary Water Resource Management
- Avian ecology and behavior
- Physiological and biochemical adaptations
- Hydrological Forecasting Using AI
- Census and Population Estimation
- Rangeland and Wildlife Management
- Coastal wetland ecosystem dynamics
Colorado State University
2014-2024
American Journal Experts (United States)
2020
NOAA National Marine Fisheries Service
2003
Understanding the mechanisms by which nonnative species successfully invade new regions and consequences for native fauna is a pressing ecological issue, one niche theory can play an important role. In this paper, we quantify comprehensive suite of morphological, behavioral, physiological, trophic, life-history traits entire fish pool in Colorado River Basin to explore number hypotheses regarding linkages between human-induced environmental change, creation modification opportunities,...
Abstract Headwater streams and wetlands are integral components of watersheds that critical for biodiversity, fisheries, ecosystem functions, natural resource-based economies, human society culture. These other services provided by intact clean headwater a sustainable future. Loss legal protections these vulnerable ecosystems would create cascade consequences, including reduced water quality, impaired functioning, loss fish habitat commercial recreational species. Many species currently...
Understanding the causes and consequences of species extinctions is a central goal in ecology. Faced with difficult task identifying those greatest need for conservation, ecologists have turned to using predictive suites ecological life-history traits provide reasonable estimates extinction risk. Previous studies linked individual risk, yet nonadditive contribution multiple entire process, from rarity local extirpation global extinction, has not been examined. This study asks whether trait...
Abstract Instream and floodplain wood can provide many benefits to river ecosystems, but also create hazards for inhabitants, infrastructure, property, recreational users in the corridor. We propose a decision process managing large wood, particularly assessing relative associated with individual pieces accumulations of wood. This be applied at varying levels effort, from relatively cursory visual assessment more detailed numerical modeling. Decisions retain, remove, or modify channel on are...
Both theory and empirical evidence identify flow regime as a primary factor driving the structure of riverine fish communities spatial patterns species invasions. We used long-term community monitoring data to evaluate hypothesized responses interannual variability in attributes across seven rivers American Southwest. asked following three questions: (1) Can annual variation abundances be explained by that represent seasonality, variability, consistency? (2) predicted based on their origin...
Managing the world's freshwater supply to meet societal and environmental needs in a changing climate is one of biggest challenges for 21st century. Dams provide water security; however, allocation dwindling among reservoirs could exacerbate or ameliorate effects change on aquatic communities. Here, we show that relative sensitivity river thermal regimes direct impacts decisions concerning storage vary substantially throughout basin. In absence interspecific interactions, future Colorado...
Abstract Understanding the effects of hydrology on fish populations is essential to managing for native conservation. However, despite decades research illustrating streamflow influences habitat, reproduction, and survival, biologists remain challenged when tasked with predicting how will respond changes in flow regimes. This uncertainty stems from insufficient understanding context-dependent mechanisms underlying responses to, example, periods reduced or altered frequency high-flow events....
Abstract Because of its relatively natural hydrograph, the Yampa River, Colorado, is considered crown jewel native fish habitat in upper basin Colorado River and has supported a intact assemblage. Nonnative fishes are thought to pose greatest threat this system. Removal programs for nonnative northern pike Esox lucius channel catfish Ictalurus punctatus have highlighted managers' perception posed by each species. Recent expansion smallmouth bass Micropterus dolomieu attracted an avid angling...
Despite the importance of habitat in determining species distribution and persistence, dynamics are rarely modeled studies metapopulations. We used an integrated habitat–occupancy model to simultaneously quantify change, site fidelity, local colonization extinction rates for larvae a suite Great Plains stream fishes Arikaree River, eastern Colorado, USA, across three years. Sites were located along gradient flow intermittency groundwater connectivity. Hydrology varied years: first third...
Abstract Pacific trout Oncorhynchus spp. in western North America are strongly valued ecological, socioeconomic, and cultural views, have been the subject of substantial research conservation efforts. Despite this, understanding their evolutionary histories, overall diversity, challenges to is incomplete. We review state knowledge on these important issues, focusing genus Oncorhynchus. Although most salmonid fishes emphasizes salmon, we focus because they share a common history, many taxa...
Knowledge of basic life-history attributes, paired with unbiased estimates species distribution, is critical for the effective conservation sensitive fish species. We quantified spawning phenology, habitat use, and detectability larvae an assemblage threatened Great Plains, USA, stream fishes using new occupancy estimation methods. Spawning by six Plains occurred from April through July, was likely initiated changes in water temperature photoperiod. Habitat size type were important factors...
Abstract Flow alterations caused by reservoir storage, groundwater pumping, diversions, and drought are widespread in North American Great Plains streams have altered fragmented habitats reduced native fish biodiversity. Early life stages of particularly sensitive to flow regimes, growth survival may negatively affect the persistence species assemblages. We investigated how brassy minnow Hybognathus hankinsoni larvae Arikaree River, Colorado, varied among three 6.4‐km river segments that...
Brassy minnow Hybognathus hankinsoni, a threatened species in Colorado, live harsh, fluctuating stream environments subject to summer drying and winter freezing the western Great Plains yet may be capable of rapid dispersal reproduction during wet season. We studied brassy populations at multiple spatial scales Arikaree River basin eastern Colorado determine underlying mechanisms driving local extinction colonization regional persistence. Habitat units three 6.4-km segments, arrayed across...
Abstract Predation experiments, field studies, and individual‐based‐model (IBM) simulations revealed factors that affected the survival recruitment of early life stages endangered Colorado pikeminnow Ptychocheilus lucius in Green River basin, Utah Colorado. Small‐bodied, nonnative red shiners Cyprinella lutrensis attacked larvae an average once per minute, predation success approached 30% laboratory aquaria. Attack rate was also high mesocosm experiments; turbidity alternative prey reduced...
Abstract We used a swim chamber, flume, and large‐scale fishway models to assess the swimming performance, behavior, passage success of endangered Rio Grande silvery minnow Hybognathus amarus. Field‐captured (53–88 mm total length) swam 114–118 cm/s (i.e., up 20.9 body lengths/s) in chamber water temperatures 15, 19, 23°C. The relationship between time fatigue velocity showed that endurance declined sharply at velocities above 60 cm/s, threshold is consistent with critical speed estimates...
Abstract Habitat alterations and introduction of nonnative fishes reduced the distributions Flannelmouth Sucker Catostomus latipinnis , Bluehead C. discobolus Roundtail Chub Gila robusta to less than 50% their historical ranges. Climate change models generally predict decreased streamflows increased water temperatures that may further affect these species. Understanding effects flow temperature on life histories should lead better assessments climate impacts extant populations more informed...
Abstract The Northern Pike Esox lucius is invasive in the upper Green and Yampa River basins of Colorado Utah impedes endangered fish recovery basin. Mechanical removal was implemented 2004, but population dynamics efficacy were not well understood. We analyzed mark–recapture records from 8,929 individual captured during 2004–2010 three reaches River: Hayden to Craig (upstream reach), South Beach–Little Canyon–Juniper (middle Maybell–Sunbeam (downstream encompassing 175 river kilometers....
More than a century of dam construction and water development in the western United States has led to extensive ecological alteration rivers. Growing interest improving river function is compelling practitioners consider restoration when managing dams extraction. We developed an Ecological Response Model (ERM) for Cache la Poudre River, northern Colorado, USA, illuminate effects current possible future management climate change. used empirical data modeled interactions among multiple...
Abstract River ecosystems are threatened by interactions among river regulation, non-native species, and climate change. Water use has exceeded supply for two decades in the USA’s Colorado basin draining its largest storage reservoirs (Lake Powell Lake Mead). In 2022, after more than of declining reservoir levels warming downstream water temperatures, began releasing from lower epilimnion into Grand Canyon segment River. While managers were concerned about risk non-native, predatory...
-The Arkansas River shiner Notropis girardi was introduced into the Pecos River, New Mexico, in 1978 and common collections made 1986-1987. From since drainage, we analyzed patterns of dispersal abundance, compared life history traits with a native population N. from Revuelto Creek, Mexico. dispersed downstream, presumably single introduction, colonizing much mainstream (260 km) by 1981. Since 1981, distribution abundance has expanded slightly. Age structure, growth mortality rates are...
Abstract We used tag–recapture data to estimate apparent survival and capture probability for 119,129 hatchery‐reared, federally endangered razorback suckers Xyrauchen texanus stocked into upper Colorado River basin streams during 1995–2005. Effects investigated included reach, year, season of stocking; fish total length (TL) at time in the first year after stocking versus subsequent years; sampling effort. Recapture were also describe poststocking movement. First‐year rate average TL (252.5...
Abstract Habitat alterations and establishment of nonnative fishes have reduced the distributions Flannelmouth Sucker Catostomus latipinnis Bluehead C. discobolus to less than 50% their historical ranges in Colorado River basin. Tributaries are sometimes altered main‐stem habitat basin may be important support various life history processes, but role maintenance populations is poorly understood. Using mark–recapture techniques, we show tributaries for native suckers upper report three main...