A5005594559- Plant Water Relations and Carbon Dynamics
- Tree-ring climate responses
- Landslides and related hazards
- Remote Sensing in Agriculture
- Geology and Paleoclimatology Research
- Geological formations and processes
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Forest Ecology and Biodiversity Studies
- Mycorrhizal Fungi and Plant Interactions
- Ecology and Vegetation Dynamics Studies
- Forest ecology and management
- Forest Insect Ecology and Management
- Hydrology and Watershed Management Studies
- Soil Carbon and Nitrogen Dynamics
- Tree Root and Stability Studies
- Ecology and Conservation Studies
- Geophysical and Geoelectrical Methods
- Irrigation Practices and Water Management
- Water Quality Monitoring and Analysis
- Climate change impacts on agriculture
- Smart Agriculture and AI
- Photosynthetic Processes and Mechanisms
- Smart Materials for Construction
- NMR spectroscopy and applications
Indiana University
2023-2025
Indiana University Bloomington
2023-2024
University of Wyoming
2016-2022
Wyoming Department of Education
2015-2020
Abstract On April 8th 2024, a total solar eclipse disrupted light-dark cycles for North American birds during the lead-up to spring reproduction. Compiling over 10,000 community observations and AI analyses of nearly 100,000 vocalizations, we found that bird behavior was significantly affected by these few minutes unexpected afternoon darkness. More than half wild species changed their biological rhythms, with many producing dawn chorus in aftermath eclipse. This natural experiment...
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 )...
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 Given the pressing challenges posed by climate change, it is crucial to develop a deeper understanding of impacts escalating drought and heat stress on terrestrial ecosystems vital services they offer. Soil plant water potential play pivotal role in governing dynamics within exert direct control over function mortality risk during periods ecological stress. However, existing observations suffer from significant limitations, including their sporadic discontinuous nature, inconsistent...
Vegetation controls carbon and water fluxes because of the fundamental tradeoff between dioxide uptake loss occurring when stomata are open. Quantifying rates this exchange typically requires either intensive gas or destructive harvesting tissues mass spectrometry analyses. Recent developments in high-throughput methods have enhanced our capacity to empirically test plant-environmental interactions. The vast integration characterizing satellite remote sensing masks organ-level physiological...
Carbon cycling research has increased over the past 20 years, but less is known about primary contributors to soil respiration (i.e. heterotrophic and autotrophic) under dormant conditions. It understood that CO2 effluxes are significantly lower during winter of temperate ecosystems assumed microorganisms dominate efflux origination. We hypothesized contributions would be greater than autotrophic simulated dormancy To test this hypothesis, we designed an experiment with following treatments:...
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...
Chlorophyll a (Chl a) has an asymmetrical molecular organization, which dictates its orientation and the location of pigment in mature photosynthetic apparatus. Although Chl fluorescence (ChlF) is widely accepted as proxy for plant performance under countless stress conditions across species, mechanistic understanding this causality missing. Since water plays much greater role than solvent machinery, elucidating influence on may explain reliable reflection response ChlF signal. We examine...
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...
Premise of research. Leaf stomatal and mesophyll conductances limit photosynthesis influence water use efficiency. Few studies have quantified the relative limitations imposed by these CO2 diffusion pathways on in mature conifer trees under natural conditions. Here, we report observations conductance changes during seasonal drying across contrasting topographic positions two Rocky Mountain conifers. We predicted that controls soil availability energy balance would determine to species with...
Abstract The emergence of billions periodical cicadas affects plant and animal communities profoundly, yet little is known about cicada impacts on soil carbon fluxes. We investigated the effects Brood X ( Magicicada septendecim, M. cassinii septendeculain ) CO 2 fluxes R S in three Indiana forests. hypothesized would be sensitive to hole density, with greatest occurring soils lowest ambient In support our hypothesis, increased increasing density greater were observed near AM‐associating...
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...