A5021297955- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Tree-ring climate responses
- Remote Sensing in Agriculture
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Hydrology and Sediment Transport Processes
- Species Distribution and Climate Change
- Plant responses to elevated CO2
- Forest Insect Ecology and Management
- Smart Agriculture and AI
- Insect and Pesticide Research
- Hydraulic flow and structures
- Leaf Properties and Growth Measurement
- Insect and Arachnid Ecology and Behavior
- Remote Sensing and LiDAR Applications
- Mycotoxins in Agriculture and Food
- Hydrology and Watershed Management Studies
- Urban Green Space and Health
- Land Use and Ecosystem Services
- CCD and CMOS Imaging Sensors
- Ecosystem dynamics and resilience
- Vascular Procedures and Complications
- Dermatological and COVID-19 studies
- Optical measurement and interference techniques
University of Florida
2022-2025
University of Tennessee Health Science Center
2023
Oklahoma State University
2018-2022
Oklahoma State University Oklahoma City
2020-2022
University of Southern California
1978-1998
University of Washington
1994
Seattle University
1994
LAC+USC Medical Center
1978
Abstract Earth’s forests face grave challenges in the Anthropocene, including hotter droughts increasingly associated with widespread forest die-off events. But despite vital importance of to global ecosystem services, their fates a warming world remain highly uncertain. Lacking is quantitative determination commonality climate anomalies pulses tree mortality—from published, field-documented mortality events—required for understanding role extreme events overall patterns. Here we established...
Summary Determining physiological mechanisms and thresholds for climate‐driven tree die‐off could help improve global predictions of future terrestrial carbon sinks. We directly tested the lethal threshold in hydraulic failure – an inability to move water due drought‐induced xylem embolism a pine sapling experiment. In glasshouse experiment, we exposed loblolly ( Pinus taeda ) saplings n = 83) stress ranging from mild lethal. Before rewatering relieve drought stress, measured native...
Summary . Congenital neutropenias include a heterogenous group of diseases characterized by decrease in circulating neutrophils. In phase I/II/III studies patients with severe congenital and cyclic neutropenia, treatment recombinant human granulocyte colony‐stimulating factor (r‐metHuG‐CSF) resulted rise the absolute neutrophil counts (ANC) reduction infections. We report effects long‐term safety subcutaneous r‐metHuG‐CSF administration 54 (congenital n = 44, 10) treated for 4–6 years. A...
Southern U.S. forests are essential for carbon storage and timber production but increasingly impacted by natural disturbances, highlighting the need to understand their dynamics recovery. Canopy cover is a key indicator of forest health resilience. Advances in remote sensing, such as NASA’s GEDI spaceborne LiDAR, enable more precise mapping canopy cover. Although provides accurate data, its limited spatial coverage restricts large-scale assessments. To address this, we combined with...
Lespedeza cuneata (sericea lespedeza; hereafter "sericea") is an invasive species brought to the U.S. from East Asia in 1890s be used as forage. However, it has now become a growing ecological and economic threat grasslands of several states southern Great Plains including Oklahoma, Kansas, Missouri, Nebraska. Here, we demonstrate capability airborne imaging spectroscopy map sericea large natural grassland within Tallgrass Prairie Preserve, largest protected tallgrass prairie world, located...
The sequence of physiological events during drought strongly impacts plants' overall performance. Here, we synthesized the global data stomatal and hydraulic traits in leaves stems 202 woody species to evaluate variations water potentials for key their along climatic gradient. We found that seasonal minimum potential, turgor loss point, closure leaf stem xylem vulnerability embolism were intercorrelated decreased with aridity, indicating stress drives trait co-selection. In xeric regions,...
Predicting drought-induced mortality (DIM) of woody plants remains a key research challenge under climate change. Here, we integrate information on the edaphoclimatic niches, phylogeny and hydraulic traits species to model risk globally. We combine these models with distribution records estimate faced by local plant assemblages. Thus, produce global maps test for its relationship observed DIM. Our results show that assemblages modelled as having higher present probability Metrics...
Evolutionary radiations of woody taxa within arid environments were made possible by multiple trait innovations including deep roots and embolism-resistant xylem, but little is known about how these traits have coevolved across the phylogeny plants or they jointly influence distribution species. We synthesized global vegetation plot datasets to examine rooting depth xylem vulnerability 188 plant species interact with aridity, precipitation seasonality, water table occurrence probabilities...
Abstract Despite the abundant evidence of impairments to plant performance and survival under hotter‐drought conditions, little is known about vulnerability reproductive organs climate extremes. Here, by conducting a comparative analysis between flowers leaves, we investigated how variations in key morphophysiological traits related carbon water economics can explain differential vulnerabilities heat drought among these functionally diverse organs. Due their lower construction costs, despite...
Summary Turgor loss point (TLP) is an important proxy for plant drought tolerance, species habitat suitability, and drought‐induced mortality risk. Thus, TLP serves as a critical tool evaluating climate change impacts on plants, making it imperative to develop high‐throughput in situ methods measure TLP. We developed hyperspectral pressure–volume curves (PV curves) estimate using leaf spectral reflectance. used partial least square regression models water potential (Ψ) relative content (RWC)...
Predicting soil water status remotely is appealing due to its low cost and large-scale application. During drought, plants can disconnect from the soil, causing disequilibrium between plant potentials at pre-dawn. The impact of this on drought response recovery not well understood, potentially complicating predictions spectral reflectance. This study aimed quantify drought-induced disequilibrium, evaluate responses recovery, determine potential for predicting Two species were tested: sweet...
Abstract Tropical rainforest woody plants have been thought to uniformly low resistance hydraulic failure and function near the edge of their safety margin (HSM), making these ecosystems vulnerable drought; however, this may not be case. Using data collected at 30 tropical forest sites for three key traits associated with drought tolerance, we show that site‐level diversity leaf turgor loss point, embolism (P 50 ), HSMs is high across forests largely independent water availability. Species...
Abstract Forest protection and afforestation have been identified as a means to partially offset anthropogenic CO 2 emissions. Yet, increasingly frequent observations of drought‐induced tree mortality are reported. Here, we applied risk analysis framework for global forest by examining extreme reductions in greenness water content canopies during past events well growth recovery surviving individual trees following stand‐scale events. We defined index (DMR) that explains 80% documented...
From 26 March to 29 2023, at the Georgia Center in Athens, GA, USA, a workshop on urban trees gathered 40 specialists from wide array of disciplines, including tree physiology, forest ecology, arboriculture, forestry, soil science, ecohydrology, vegetation modelling, computer vision, and industrial design. With 28 attendees four continents, seven countries physically present, further 12 participants joining virtually, brought together an international team aiming better understand...