A5101735966- Atmospheric chemistry and aerosols
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Algal biology and biofuel production
- Plant responses to elevated CO2
- Biocrusts and Microbial Ecology
- Advanced Aircraft Design and Technologies
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Microbial Metabolic Engineering and Bioproduction
- Vehicle emissions and performance
- Soil and Unsaturated Flow
- Planetary Science and Exploration
- Water Quality and Resources Studies
- Geotechnical Engineering and Soil Mechanics
- Spaceflight effects on biology
- Rangeland and Wildlife Management
- Coastal and Marine Management
- Ocean Acidification Effects and Responses
- Indoor Air Quality and Microbial Exposure
- Aeolian processes and effects
- Landslides and related hazards
- Aerospace Engineering and Energy Systems
- Lichen and fungal ecology
- Microbial Community Ecology and Physiology
University of Florida
2019-2024
Georgia Institute of Technology
2021-2024
Florida Museum of Natural History
2020
Langley Research Center
2011
Wildland fire is a major global driver in the exchange of aerosols between terrestrial environments and atmosphere. This commonly quantified using emission factors or mass pollutant emitted per fuel burned. However, for microbes aerosolized by have yet to be determined. Using bacterial cell concentrations collected on unmanned aircraft systems over forest fires Utah, USA, we determine (BEFs) first time. We estimate that 1.39 × 10
Abstract The atmosphere contains a diverse reservoir of microbes but the sources and factors contributing to microbial aerosol variability are not well constrained. To advance understanding emissions in wildfire smoke, we used unmanned aircraft systems analyze aerosols above high-intensity forest fires western United States. Our results show that samples smoke contained ~four-fold higher concentrations cells (1.02 ± 0.26 × 105 m−3) compared background air, with 78% inferred be viable....
Abstract Smoke from wildland fires contains more diverse, viable microbes than typical ambient air, yet little is known about the sources and sinks of smoke‐borne microorganisms. Data molecular‐based surveys suggest that microorganisms originate material associated with vegetation underlying soils becomes aerosolized during combustion, however, in smoke have not been experimentally assessed. To elucidate this link, we studied high‐intensity forest Fishlake National Forest, Utah, USA applied...
The processes removing aerosols from the atmosphere during rainfall are generically referred to as scavenging. Scavenging influences aerosol distributions in atmosphere, with consequent effects on cloud properties, radiative forcing, and human health. In this study, we investigated below-cloud scavenging process, specifically focusing of 0.2 2 µm-sized microbial by populations water drops average diameters 3.0 3.6 mm. Rainfall was simulated convective boundary layer air masses dispensing a...
Abstract Previous studies have identified regions where the occurrence of rainfall significantly increases or decreases probability for subsequent over periods that range from a few days to several weeks. These observable phenomena are termed “rainfall feedback” (RF). To better understand land–atmosphere interactions involved in RF, behavior RF patterns was analyzed using data 1849 2016 at ~3000 sites contiguous United States. We also considered changes major land‐use types and applied...
Gloeocapsopsis dulcis strain AAB1 is an extremely xerotolerant cyanobacterium isolated from the Atacama Desert (i.e., driest and oldest desert on Earth) that holds astrobiological significance due to its ability biosynthesize compatible solutes at ultra-low water activities. We sequenced assembled G. genome de novo using a combination of long- short-read sequencing, which resulted in high-quality consensus sequences chromosome two plasmids. leveraged generate genome-scale metabolic model...
<title>Abstract</title> Diverse microbiota inhabit some of Earth's most extreme arid regions, enduring in environments where survival seems improbable. Despite numerous reports microorganisms across the Atacama Desert—the oldest and driest desert on Earth—our understanding how they adapt to conditions its hyperarid core remains limited. Prior systematic studies hyper-arid have relied upon targeted gene sequencing (e.g., 16S rDNA), limiting inference microbial community structure function....
Abstract Several studies have reported new data on the estimated compositions of chemical components at Gale crater; however, there is still a lack information regarding potential past support biomass and detectable biomarkers ancient life. In this study we evaluate microbial habitability early Mars constrained by recently reconstructed water chemistry Gale. The modeled community based Fe-metabolizing bacteria with ability to utilize solid-phase iron oxides (e.g., magnetite) as an electron...
Abstract Gloeocapsopsis dulcis strain AAB1 is an extremely xerotolerant cyanobacterium isolated from the Atacama Desert (i.e., driest and oldest desert on Earth) that holds astrobiological significance due to its surprising ability biosynthesize compatible solutes at ultra-low water activities. We sequenced assembled G. genome de novo using a combination of long- short-read sequencing, which resulted in high-quality consensus sequences chromosome two plasmids. leveraged generate genome-scale...