A5030174951- Seismic Waves and Analysis
- Methane Hydrates and Related Phenomena
- Earthquake Detection and Analysis
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Soil Carbon and Nitrogen Dynamics
- Fire effects on ecosystems
- Fish Ecology and Management Studies
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Peatlands and Wetlands Ecology
- Water Quality Monitoring and Analysis
- Atmospheric chemistry and aerosols
- Seismology and Earthquake Studies
- Water Quality Monitoring Technologies
- Microbial Community Ecology and Physiology
- Advanced Materials and Mechanics
- Species Distribution and Climate Change
- Polar Research and Ecology
- Plant Water Relations and Carbon Dynamics
- Hydrology and Sediment Transport Processes
- Hydrological Forecasting Using AI
Pacific Northwest National Laboratory
2021-2024
University of California, Merced
2014-2024
University of Massachusetts Amherst
2024
University of Cambridge
2024
University of Nevada, Reno
2023
University of California, Riverside
2021
Lawrence Livermore National Laboratory
2021
Holmes Regional Medical Center
2019
Public Health Ontario
2017
University of British Columbia
2013
The development of consumer sleep-tracking technologies has outpaced the scientific evaluation their accuracy. In this study, five devices, research-grade actigraphy, and polysomnography were used simultaneously to monitor overnight sleep fifty-three young adults in lab for one night. Biases limits agreement assessed determine how stage estimates each device actigraphy differed from polysomnography-derived measures. Every device, except Garmin Vivosmart, was able estimate total time...
Phosphorus is one of the essential nutrients for plant growth, but it may be relatively unavailable to plants because its chemistry. In soil, majority phosphorus present in form a phosphate, usually as metal complexes making bound minerals or organic matter. Therefore, inorganic phosphate solubilization an important process growth promotion by associated bacteria and fungi. Non-nodulating species have been shown thrive low-nutrient environments, some instances relying on microorganisms...
We actuate designed liquid crystal elastomer sheets to form curved folds that bear non-zero Gaussian curvature and have unusual mechanics.
Abstract. Shifting phosphorus (P) dynamics after wildfires can have cascading impacts from terrestrial to aquatic environments. However, it is unclear if post-fire responses are primarily driven by changes the molecular composition of charred material or transport P-containing compounds. We used laboratory leaching experiments Douglas-fir forest and sagebrush shrubland chars examine how potential mobility P compounds influenced different burn severities. Burning produced a 6.9- 29- fold...
Abstract. Understanding aquatic ecosystem metabolism involves the study of two key processes: carbon fixation via primary production and organic C mineralization as total respiration (ERtot). In streams rivers, ERtot includes in water column (ERwc) sediments (ERsed). While literature surveys suggest that ERsed is often a dominant contributor to ERtot, recent studies indicate relative influence sediment-associated processes versus can fluctuate along river continuum. Still, comprehensive...
Subsoil microbiomes play important roles in soil carbon and nutrient cycling, yet our understanding of the controls on subsoil microbial communities is limited. Here, we investigated direct (mean annual temperature precipitation) indirect (soil chemistry) effects climate microbiome composition extracellular enzyme activity throughout profile across two elevation-bioclimatic gradients central California, USA. We found that changes decreases with depth. Across these sites, influence was...
1 INTRODUCTION:Climate change is driving earlier seasonal onset of wildfire, increased fire frequency, and larger fires in many regions globally (Flannigan et al., 2009; Westerling, 2016). Wildfires induce changes ecohydrological processes, including reduced infiltration from soil hydrophobicity (DeBano, 2000), canopy cover that diminishes evapotranspiration interception precipitation (Guo 2023; Wine 2018). The resulting streamflow terrestrial-aquatic connectivity these shifts processes...
Wildfires produce solid residuals that have unique chemical and physical properties compared to unburned materials, which influence their cycling fate in the natural environment. Visual burn severity assessment is used evaluate post-fire alterations landscape field-based studies, yet muffle furnace methods are commonly laboratory studies assess molecular scale along a temperature continuum. Here, we examined leachable organic matter characteristics from chars visually characterized as low...
In health libraries, it is becoming increasingly important to recognize and understand user interactions expectations. Research suggests that more patients will begin rely on online resources receive information. response, many organizations have turned social media micro-blogging services try meet those needs. The ease of posting sharing information Twiter makes an essential tool for libraries use reach their users. However, lack systematic metrics measuring success can find themselves...
Figure S1.Field sites, Yakima River basin catchments sharing similar landscape characteristics and observed water column respiration rates across the basin, Washington, USA.(a) Field sites from 2021 spatial study superimposed on a map of catchment cluster analysis results.U. S. Geological Survey National Hydrography Dataset Plus Version 2.1 (NHDPlusV2.1)catchments were grouped into six classes using key biophysical hydrologic variables characterized 5 according to tree height, precipitation,...
Abstract. Aerobic respiration of organic matter is a key metabolic process influencing carbon (C) biogeochemistry in aquatic ecosystems. Anthropogenic and environmental perturbations to stream ecosystem metabolism can have deleterious effects on downstream water quality. Various features rivers also influence metabolism, including physical (e.g., discharge, light, flow regimes) chemical factors (nutrients, matter) watershed characteristics size or drainage area, land use). The relative...
Chemical forms of phosphorus (P) in airborne particulate matter (PM) are poorly known and do not correlate with solubility or extraction measurements commonly used to infer speciation. We P X-ray absorption near-edge structure (XANES) 31P nuclear magnetic resonance (NMR) spectroscopies determine species PM collected at four mountain sites (Colorado California). Organic dominated samples from high elevations, organic estimated 65–100% total bulk by XANES 79–88% extracted fractions (62–84% P)...
Dust provides an ecologically significant input of nutrients, especially in slowly eroding ecosystems where chemical weathering intensity limits nutrient inputs from underlying bedrock. In addition to inputs, incoming dust is a vector for dispersing dust-associated microorganisms. While little known about dust-microbial dispersal, deposits may have transformative effects on far the was emitted. Using molecular analyses, we examined spatiotemporal variation microbiomes along elevational...
Abstract Understanding potential response of forest carbon (C) and nutrient storage to warming is important for climate mitigation policies. Unfortunately, those responses are difficult predict in seasonally dry forests, part, because ecosystem processes highly sensitive both changes temperature precipitation. We investigated how might alter stocks C, nitrogen (N), phosphorus (P) vegetation the entire regolith (soil + weathered bedrock or “saprock”) using a space‐for‐time substitution along...
Journal Article THE UTILIZATION OF SOLAR LIGHT AND HEAT IN TREATMENT NIGHT SOIL Get access M.E. BARNES, M.D. Search for other works by this author on: Oxford Academic PubMed Google Scholar American of Epidemiology, Volume 5, Issue 2, 1 March 1925, Pages 202–216, https://doi.org/10.1093/oxfordjournals.aje.a119658 Published: 01 1925 history Received: 26 November 1924