A5074915946- Ecology and Vegetation Dynamics Studies
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Soil Moisture and Remote Sensing
- Rangeland and Wildlife Management
- Advanced materials and composites
- Peatlands and Wetlands Ecology
- Atmospheric chemistry and aerosols
- Species Distribution and Climate Change
- Soil and Water Nutrient Dynamics
- Material Properties and Applications
- Coastal wetland ecosystem dynamics
- Plant Water Relations and Carbon Dynamics
- Powder Metallurgy Techniques and Materials
- Aerosol Filtration and Electrostatic Precipitation
- Botany, Ecology, and Taxonomy Studies
- Metallurgical and Alloy Processes
- Aeolian processes and effects
- Tribology and Wear Analysis
- Analytical Chemistry and Sensors
- Groundwater flow and contamination studies
- Precipitation Measurement and Analysis
- High-Velocity Impact and Material Behavior
- Atmospheric aerosols and clouds
- Tree Root and Stability Studies
National Ecological Observatory Network
2018-2024
Cornell University
2005-2021
Beltsville Agricultural Research Center
2021
Jet Propulsion Laboratory
2021
Agricultural Research Service
2021
University of Colorado Boulder
2013-2019
Institute of Arctic and Alpine Research
2013-2019
Cary Institute of Ecosystem Studies
2004-2013
Louisiana Department of Natural Resources
2013
The Jones Center at Ichauway
2004
Significance Human activities have elevated nitrogen (N) deposition and there is evidence that impacts species diversity, but spatially extensive context-specific estimates of N loads at which losses begin remain elusive. Across a wide range climates, soil conditions, vegetation types in the United States, we found 24% >15,000 sites were susceptible to deposition-induced loss. Grasslands, shrublands, woodlands lower than forests, susceptibility increased acidic soils. These findings are...
Atmospheric deposition has long been recognized as an important source of pollutants and nutrients to ecosystems. The need for reliable, spatially explicit estimates total atmospheric (wet + dry cloud) is central, not only air pollution effects researchers, but also calculation input–output budgets, decision makers faced with the challenge assessing efficacy policy initiatives related deposition. Although continues represent a critical environmental scientific issue, current have large...
Soil moisture influences forest health, fire occurrence and extent, insect pathogen impacts, creating a need for regular, globally extensive soil measurements that can only be achieved by satellite-based sensors, such as NASA's active passive (SMAP). However, SMAP data forested regions, which account ∼20% of land cover globally, are flagged unreliable due to interference from vegetation water content, forests were underrepresented in previous validation efforts, preventing an assessment...
Mounds formed by pocket gophers (Geomys pinetis) in a longleaf pine—wiregrass savanna had larger daily soil temperature fluctuations than surrounding matrix locations. Microsite differences persisted for more year, but were largest during summer months. Mound also lower total carbon, nitrogen, available ammonium, phosphate and slightly moisture These occurred the context of an ecosystem where frequent fire consumes organic matter removes herbaceous cover. The distinct microclimate nutrient...
A map of the vegetation Catskill Park, NY, was created using multi-temporal Landsat Thematic Mapper TM data and ancillary spatial to support ecological studies in watersheds. The emphasizes forest types defined by dominant tree species depicts 24 classes. Mapping included a series supervised classifications decision framework that allowed be distinguished spectral characteristics other environmental relationships (e.g., landscape position, elevation). Traditional contingency table analysis...
Pocket gophers (Geomys pinetis), Gopher Tortoises, armadillos, and fire ants were the primary soil disturbance agents in a longleaf pine ecosystem. gopher mounds most abundant covered greatest percentage of study area. The prominent feature pocket regime was strong peak mound formation from November to January each year three-year study, with location clusters shifting year. During area disturbed 0.25-ha plots ranged 0.7–1.0% yr−1. rates negatively correlated air temperature influenced by...
Soil moisture influences forest health, fire occurrence and extent, insect pathogen impacts, creating a need for regular, globally extensive soil measurements that can only be achieved by satellite-based sensors, such as NASA’s Moisture Active Passive (SMAP). However, SMAP data forested regions, which account ~20% of land cover globally, are flagged unreliable due to interference from vegetation water content, forests were underrepresented in previous validation efforts, preventing an...
The National Ecological Observatory Network (NEON) is a continental-scale endeavor of ecological data collection for 30 years. We created software package, neonPlantEcology that automatically arranges the raw from plant presence and percent cover (DP1.10058.001) product NEON into tables familiar to ecologists. Because broad scale observatory, it necessary tailor idiosyncrasies each 47 different ecosystems. Furthermore, practices are occasionally modified various reasons. These complexities,...
The National Ecological Observatory Network (NEON) is a continental-scale endeavor of ecological data collection for 30 years. We created software package, neonPlantEcology that automatically arranges the raw from plant presence and percent cover (DP1.10058.001) product NEON into tables familiar to ecologists. Because broad scale observatory, it necessary tailor idiosyncrasies each 47 different ecosystems. Furthermore, practices are occasionally modified various reasons. These complexities,...