A5046168567- Phonetics and Phonology Research
- Voice and Speech Disorders
- Speech Recognition and Synthesis
- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Cryospheric studies and observations
- Speech and dialogue systems
- Groundwater flow and contamination studies
- Soil and Water Nutrient Dynamics
- Music and Audio Processing
- Hearing Loss and Rehabilitation
- Human-Automation Interaction and Safety
- Amphibian and Reptile Biology
- Climate change and permafrost
- Music Technology and Sound Studies
- Dysphagia Assessment and Management
- Linguistic Variation and Morphology
- Speech and Audio Processing
- Obstructive Sleep Apnea Research
- Fish Ecology and Management Studies
- Freshwater macroinvertebrate diversity and ecology
- Hydrology and Sediment Transport Processes
- Stuttering Research and Treatment
- Occupational Health and Safety Research
- Plant Water Relations and Carbon Dynamics
Rocky Mountain Biological Laboratory
2003-2024
ETH Zurich
2023-2024
University of Leeds
2023
All Things Bugs (United States)
2019
University of Florida
1998-2010
University of Aveiro
2003-2004
Escola Superior de Saúde do Alcoitão
2003
Skidmore College
2003
East Carolina University
2002
University of Pittsburgh
1998
Price £3 3s. Od
Abstract Understanding concentration‐discharge (C‐Q) relationships are essential for predicting chemical weathering and biogeochemical cycling under changing climate anthropogenic conditions. Contrasting C‐Q have been observed widely, yet a mechanistic framework that can interpret diverse patterns remains elusive. This work hypothesizes seemingly disparate driven by switching dominance of end‐member source waters their contrasts arising from subsurface heterogeneity. We use data Coal Creek,...
Abstract Critical zone influences on hydrologic partitioning, subsurface flow paths and reactions along these dictate the timing magnitude of groundwater solute flux to streams. To isolate first‐order controls seasonal streamflow generation within highly heterogeneous, snow‐dominated basins Colorado River, we employ a multivariate statistical approach end‐member mixing analysis using suite daily chemical isotopic observations. Mixing models are developed across 11 nested (0.4 85 km 2 )...
Abstract Understanding the partitioning of snow and rain contributing to either catchment streamflow or evapotranspiration (ET) is critical relevance for water management in response climate change. To investigate this partitioning, we use endmember splitting mixing analyses based on stable isotope ( 18 O) data from nine headwater catchments East River, Colorado. Our results show that one third partitions ET 13% snowmelt sustains summer streamflow. Only 8% rainfall contributes streamflow,...
Abstract Isotopic information from 81 snowpits was collected over a 5‐year period in large, Colorado watershed. Data spans gradients elevation, aspect, vegetation, and seasonal climate. They are combined with overlapping campaigns for water isotopes precipitation snowmelt, land‐surface model detailed estimates of snowfall climate at sample locations. Snowfall isotopic inputs, describe the majority δ 18 O snowpack variability. Aspect is secondary control, slightly more enriched conditions on...
Comparative data from subalpine wetlands in Colorado indicate that larvae of the limnephilid caddisflies, Asynarchus nigriculus and Limnephilus externus, are reciprocally abundant among habitats–Limnephilus dominate permanent waters, whereas temporary basins. The purpose this paper is to report on field laboratory experiments link pattern abundance biotic interactions larvae. In first experiment, growth survival were compared single mixed species treatments littoral enclosures. Larvae, which...
Abstract Although bedrock weathering strongly influences water quality and global carbon nitrogen budgets, the depths rates within subsurface are not well understood nor predictable. Determination of both porewater chemistry flow needed in order to develop more complete understanding obtain rates. In a long-term field study, we applied multiphase approach along mountainous watershed hillslope transect underlain by marine shale. Here report three findings. First, deepest extent table...
Abstract. About 80 % of the precipitation at Colorado River's headwaters is snow, and resulting snowmelt-driven hydrograph a crucial water source for about 40 million people. Snowmelt from alpine subalpine snowpack contributes substantially to groundwater recharge river flow. However, dynamics snowmelt progression are not well understood because observations high-elevation difficult due challenging access in complex mountainous terrain as cost labor intensity currently available methods. We...
Abstract. A declining spring snowpack is expected to have widespread effects on montane and subalpine forests in western North America across the globe. The way that tree water demands respond this change will important impacts forest health downstream subsidies. Here, we present data from a network of sap velocity sensors xylem isotope measurements three common species (Picea engelmannii, Abies lasiocarpa Populus tremuloides) hillslope transect watershed Upper Colorado River basin. We use...
We conducted a series of field and laboratory experiments to determine the direct indirect effects top predator, tiger salamander (Ambystoma tigrinum nebulosum), on larvae two species limnephilid caddisflies (Limnephilus externus Asynarchus nigriculus) in subalpine wetlands central Colorado. predominate temporary are aggressive intraguild predators Limnephilus larvae, which only permanent basins with salamanders. first experiment mesocosms (cattle tanks) quantify predatory different life...
SUMMARY 1. Larvae of cased caddisflies (Limnephilidae and Phryganeidae) are among the most abundant conspicuous invertebrates in northern wetlands. Although species replacements often observed along permanence gradients, underlying causal mechanisms poorly understood. In this paper, we report on distributional patterns permanent temporary high‐altitude ponds, how those reflect differences life history characteristics that affect desiccation tolerance (fundamental niches) versus constraints...
Abstract Major components of hydrologic and elemental cycles reside underground, where their complex dynamics linkages to surface waters are obscure. We delineated seasonal subsurface flow transport along a hillslope in the Rocky Mountains (USA), precipitation occurs primarily as winter snow drainage discharges into East River, tributary Gunnison River. Hydraulic geochemical measurements down 10 m below ground supported application transmissivity feedback snowmelt describe through three...
Abstract A coupled hydrologic and snowpack stable water isotope model assesses controls on isotopic inputs across a mountainous basin. Annually, the most depleted conditions occur in upper subalpine where snow accumulation is high, rainfall low. Snowmelt evolution over time indicates fractionation processes account for <25% snowmelt enrichment. Meltwater are largely determined by amount, phase mass of precipitation coincident with ablation period. Effect vapor loss from d‐excess balance...