A5067879714- Plant responses to elevated CO2
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Bioenergy crop production and management
- Forest ecology and management
- Vehicle emissions and performance
- Plant Stress Responses and Tolerance
- Atmospheric and Environmental Gas Dynamics
- Analytical Chemistry and Chromatography
- Atmospheric aerosols and clouds
- Biodiesel Production and Applications
- Water Quality Monitoring and Analysis
- Odor and Emission Control Technologies
- Catalysis and Oxidation Reactions
- Pacific and Southeast Asian Studies
- Various Chemistry Research Topics
- Geology and Paleoclimatology Research
- Tree Root and Stability Studies
- Biofuel production and bioconversion
- Soil Carbon and Nitrogen Dynamics
- Leaf Properties and Growth Measurement
- Turfgrass Adaptation and Management
- Forest Insect Ecology and Management
- Indoor Air Quality and Microbial Exposure
- Ecology and Vegetation Dynamics Studies
Macquarie University
2014-2022
Cornell University
2006-2020
Cooperative Institute for Research in Environmental Sciences
2011-2015
University of Colorado Boulder
2012-2015
University of Colorado System
2014-2015
Bates College
2015
Abstract Despite the known biochemical production of a range aromatic compounds by plants and presence benzenoids in floral scents, emissions only few benzenoid have been reported from biosphere to atmosphere. Here, using evidence measurements at aircraft, ecosystem, tree, branch leaf scales, with complementary isotopic labeling experiments, we show that vegetation (leaves, flowers phytoplankton) emits wide variety atmosphere substantial rates. Controlled environment experiments are able...
Abstract. The Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen (BEACHON) project seeks to understand the feedbacks and inter-relationships between hydrology, biogenic emissions, carbon assimilation, aerosol properties, clouds associated within water-limited ecosystems. Manitou Experimental Forest Observatory (MEFO) was established in 2008 by National Center for Atmospheric Research address many BEACHON research objectives, it now provides a...
Biogenically released isoprene plays important roles in both tropospheric photochemistry and plant metabolism. We performed a 13CO2-labeling study using proton-transfer-reaction mass spectrometry (PTR-MS) to examine the kinetics of recently assimilated photosynthate into emitted from poplar (Populus × canescens) trees grown measured at different atmospheric CO2 concentrations. This is first explicitly consider effects altered concentration on carbon partitioning biosynthesis. studied changes...
Abstract Plant growth rates drive ecosystem productivity and are a central element of plant ecological strategies. For seedlings grown under controlled conditions, large literature has firmly identified the functional traits that interspecific variation in rate. adult plants, corresponding knowledge is surprisingly poorly understood. Until recently it was widely assumed key trait drivers would be same (e.g. specific leaf area, or SLA), but an increasing number papers demonstrated this not to...
Plantations of hybrid poplar are used in temperate regions to produce woody biomass for forestry‐related industries and likely become more prevalent if they as a source cellulose second‐generation biofuels. Species the genus Populus known emit great quantities volatile organic compounds (VOCs) isoprene methanol, lesser terpene VOCs, giving plantations potential significantly influence regional atmospheric chemistry. The goals this study were quantify differences isoprene, monoterpene...
ABSTRACT Pollutants like O 3 and NO 2 enter leaves through the stomata cause damage during reactions with components of biological cell membranes. The steady‐state flux rates these gases into leaf are determined by a series physical biochemical resistances including stomatal aperture, occurring within wall ability to remove products apoplastic reactions. In present study, multiple regression models incorporating conductance, symplastic ascorbate concentrations, nitrate reductase (NR)...
Isoprene and other volatile organic compounds emitted from vegetation play a key role in governing the formation of ground-level ozone. Emission rates such depend critically on plant species. The cultivation biofuel feedstocks will contribute to future land use change, altering distribution species hence magnitude emissions. Here we relationships between biomass yield isoprene emissions derived experimental data for 29 commercially available poplar hybrids assess impact that large-scale as...
Various human-induced changes to the atmosphere have caused carbon dioxide (CO2), nitrogen (NO2) and nitrate deposition (NO3−) increase in many regions of world. The goal this study was examine simultaneous influence these three factors on tree seedlings. We used open-top chambers fumigate sugar maple (Acer saccharum) eastern hemlock (Tsuga canadensis) with ambient or elevated CO2 NO2 (elevated concentrations were 760 ppm 40 ppb, respectively). In addition, we applied an artificial wet 30 kg...
[1] In arid regions, emissions of nitrogen (N) gases are important to long-term soil fertility and regional atmospheric chemistry, making alterations in N gas an aspect ecosystem response climate change. Studies at the Nevada Desert FACE Facility suggest that rising CO2 concentrations impact ecosystems dynamics Mojave Desert; our objective was identify whether those responses translate into changes trace emissions. We measured fluxes reactive (NO, NOy, NH3) N2O plots receiving fumigation...
Abstract. The Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen (BEACHON) project seeks to understand the feedbacks and inter-relationships between hydrology, biogenic emissions, carbon assimilation, aerosol properties, clouds associated within water-limited ecosystems. Manitou Experimental Forest Observatory (MEFO) was established in 2008 by National Center for Atmospheric Research address many BEACHON research objectives, it now provides a...
Despite the critical role of woody tissues in determining net carbon exchange terrestrial ecosystems, relatively little is known regarding drivers sapwood and bark respiration.Using one most comprehensive wood respiration datasets to date (82 species from Australian rainforest, savanna temperate forest), we quantified relationships between tissue rates (Rd) measured vitro (i.e. 'respiration potential') physical properties sapwood, nitrogen concentration (Nmass) leaves, bark.Across all sites,...
Anthropogenic activities have caused multiple simultaneous changes to the chemical composition of atmosphere. While rising carbon dioxide (CO2) has been shown accelerate plant growth and impact phenology, it is unclear how these outcomes may be modified by effects co-occurring pollutants such as ozone (O3, a damaging oxidant), nitrogen (NO2, an oxidant or signal), atmospheric deposition. To test interactive on Arabidopsis thaliana was grown in open-top chambers with fully factorial...