A5028973103- Plant Water Relations and Carbon Dynamics
- Landslides and related hazards
- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Cryospheric studies and observations
- Forest ecology and management
- Climate change and permafrost
- Forest Insect Ecology and Management
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Tree Root and Stability Studies
- Hydrology and Watershed Management Studies
- Wastewater Treatment and Nitrogen Removal
- Soil and Unsaturated Flow
- Plant responses to water stress
- Plant Parasitism and Resistance
- Irrigation Practices and Water Management
- Remote Sensing in Agriculture
- Aeolian processes and effects
- Geophysical and Geoelectrical Methods
- Climate variability and models
- Seedling growth and survival studies
- Ecology and Conservation Studies
- Plant responses to elevated CO2
- Hydrology and Sediment Transport Processes
University of Wyoming
2014-2021
Wyoming Department of Education
2015-2016
Colorado State University
2014
Climate models predict widespread increases in both drought intensity and duration the next decades. Although water deficiency is a significant determinant of plant survival, limited understanding responses to extreme impedes forecasts forest crop productivity under increasing aridity. Drought induces suite physiological responses; however, we lack an accurate mechanistic description response lethal that would improve predictive mortality altered climate conditions. Here, proxies for leaf...
Eddy covariance nighttime fluxes are uncertain due to potential measurement biases. Many studies report eddy flux lower than from extrapolated chamber measurements, despite corrections for low turbulence. We compared and estimates of ecosystem respiration at the GLEES Ameriflux site over seven growing seasons under high turbulence [summer night mean friction velocity (u*) = 0.7 m s(-1)], during which bark beetles killed or infested 85% aboveground respiring biomass. Chamber-based growth...
Abstract In subalpine watersheds of the intermountain western United States, snowpack melt is dominant water input to hydrologic system. The primary focus this work understand partitioning from during snowmelt period and through remainder growing season. We conducted a time‐lapse electrical resistivity tomography (ERT) study in conjunction with budget analysis track snow‐on snow‐off season (May–August 2015). Seismic velocities provided an estimate regolith thickness while transpiration...
Abstract Drought predisposes conifer forests to bark beetle attacks and mortality. Although plant hydraulic stress mechanistically links tree mortality, its capacity predict trees' susceptibility has not been evaluated. Further, both size water supply could influence stress, but their relative importance remained unknown. In this study, we modeled of individual trees in a mixed forest Lodgepole pine ( Pinus contorta ), Engelmann spruce Picea engelmannii Subalpine fir Abies lasiocarpa )...
Mistletoes are important co-contributors to tree mortality globally, particularly during droughts. In Australia, mistletoe distributions expanding in temperate woodlands, while their hosts have experienced unprecedented heat and drought stress recent years. We investigated whether the excessive water use of mistletoes increased probability xylem emboli a mature woodland record that was compounded by multiple heatwaves. continuously recorded transpiration ($T_{SLA}$) infected uninfected...
Abstract Plant transpiration is the largest evaporative flux from most vegetated ecosystems, playing a dominant role in energy balance, water and element cycling, ecosystem services security. Quantification of plant‐level transpiration, for example sap flux, essential to land managers scientists. Thermal dissipation probes (TDP) are reliable affordable tools measuring but difficulties replicable data processing often serve as barrier their use interpretation data. AquaFlux an r package...
Abstract The total solar eclipse of August 21, 2017 created a path totality ~115 km in width across the United States. While observations have shown distinct responses animal behavior often emulating nocturnal behavior, influence eclipses on plant physiology are less understood. We investigated physiological perturbations due to rapid changes sunlight and air temperature big sagebrush ( Artemisia tridentata ssp. vaseyana ), desert shrub common within totality. Leaf gas exchange, water...
Bark beetles naturally inhabit forests and can cause large-scale tree mortality when they reach epidemic population numbers. A recent (1990s–2010s), primarily driven by mountain pine ( Dendroctonus ponderosae ), was a leading agent in western United States forests. Predictive models of beetle populations their impact on largely depend host related parameters, such as stand age, basal area, density. We hypothesized that bark attack patterns are also dependent inferred densities: large will...
PreviousNext You have accessSymposium on the Application of Geophysics to Engineering and Environmental Problems 2016Critical Zone GeophysicsAuthors: Emily VoytekKamini SinghaAaron BandlerCharles MagillStacy HendricksKatherine GroteManeh KotikianAndrew ParsekianGinger PaigeBrent EwersThijs KellenersNoriaki OharaAustin CareyDaniel BeverlyHeather SpeckmanW. Steven HolbrookScott MillerEric WhiteCarole JohnsonJonathan NyquistTiffany TaylorSylvain PasquetRoger GuérinSarah BarhoumMarine...