A5065166134- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Atmospheric chemistry and aerosols
- Forest ecology and management
- Fire effects on ecosystems
- Forest Insect Ecology and Management
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Tree-ring climate responses
- Remote Sensing in Agriculture
- Plant Parasitism and Resistance
- Forest Management and Policy
- Remote Sensing and LiDAR Applications
- Peatlands and Wetlands Ecology
- Air Quality and Health Impacts
- Plant and animal studies
- Fern and Epiphyte Biology
- Hydrology and Drought Analysis
- Methane Hydrates and Related Phenomena
- Lichen and fungal ecology
- Air Quality Monitoring and Forecasting
- Bryophyte Studies and Records
- Climate variability and models
- Seedling growth and survival studies
- Ecology and Vegetation Dynamics Studies
Pacific Northwest Research Station
2011-2024
US Forest Service
2004-2022
RedCastle Resources (United States)
2016-2020
Rocky Mountain Research (United States)
2020
Rocky Mountain Research Station
2020
Western Wildland Environmental Threat Assessment Center
2014-2019
United States Department of Agriculture
1993-2015
Pacific Southwest Research Station
2001-2011
Istanbul University
2011
Austrian Research Centre for Forests
2011
Abstract. The DO3SE (Deposition of O3 for Stomatal Exchange) model is an established tool estimating ozone (O3) deposition, stomatal flux and impacts to a variety vegetation types across Europe. It has been embedded within the EMEP (European Monitoring Evaluation Programme) photochemical provide policy capable relating flux-based risk damage precursor emission scenarios use in formulation. A key limitation regional assessments assumption that soil water deficits are not limiting due...
Climate change and air pollution are two of the anthropogenic stressors that require international collaboration. Influence mechanisms combating strategies towards them have similarities to some extent. Impacts climate long been studied under IUFRO Research Group 7.01 state art findings presented at biannual meetings. Monitoring, modelling, assessment multiple stressors, ecophysiology, nutrient cycles thoroughly aspects research for a time umbrella RG 7.01. Recently, social economic issues...
Native stands of giant sequoia (Sequoiadendron giganteum Bucholz) are being exposed to relatively high concentrations atmospheric ozone produced in urban and agricultural areas upwind. The expected change environmental conditions over the next 100 years is likely be unprecedented life span (about 2,500 years) sequoia. We determined changes physiological responses three age classes (current-year, 12-, 125-year-old) differing ozone, assessed age-related differences sensitivity pollutants by...
Outcomes from the 22nd meeting for Specialists in Air Pollution Effects on Forest Ecosystems "Forests under Anthropogenic Pressure--Effects of Pollution, Climate Change and Urban Development", September 10-16, 2006, Riverside, CA, are summarized. Tropospheric or ground-level ozone (O3) is still phytotoxic air pollutant major interest. Challenging issues how to make O3 standards critical levels more biologically based at same time practical wide use; quantification plant detoxification...
Ponderosa pine (Pinus ponderosa Dougl. ex Laws.) is widely distributed in the western USA. We report lack of stomatal closure at night early summer for two three sites investigated. Trees a third site with lower nitrogen dioxide and nitric acid exposure, but greater drought stress, had slightly open stomata closed rest summer. The similar background ozone exposure during measurement (2001). Nighttime conductance (gs) ranged from one tenth to fifth that maximum daytime values. In general,...
Extensive bark beetle outbreaks have recently occurred in western North American forests, resulting overstory tree mortality across millions of hectares. Annual aerial surveys are currently used to operationally monitor induced mortality, though this method is subjective and can exclude some forest areas. Daily Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data offer a potential alternative means develop regional maps. Accurate methods using such could aid natural resource...
The health of coniferous forests in the western U.S. is under threat from mega-drought events, increasing vulnerability to insects, disease, and mortality. Forest densification resulting fire exclusion increases these susceptibilities. Silvicultural treatments reduce stand density promote resilience both drought have been used threats but there are few quantitative evaluations treatment effectiveness. This proof-of-concept study focused on such an evaluation, using field remote sensing...
Plant physiological models are generally parameterized from many difference sources of data, including chamber experiments and plantations, seedlings to mature trees. We obtained a comprehensive data set for natural stand ponderosa pine (Pinus Laws.) used these parameterize the physiologically based model, TREGRO. Representative trees each five tree age classes were selected on population means morphological, physiological, nearest neighbor attributes. Differences in key attributes (gas...
An automated, C02-controlled, long-term greenhouse system ('CO2LT') has been developed to provide replicated in situ ecosystem-level manipulation of atmospheric CO2 concentration and temperature for intact plots tussock tundra, measure the instantaneous exchange rates within each under treatments imposed. This is a computer-controlled, closed, null-balance consisting 12 chambers with individual control temperature. Carbon dioxide can be maintained chamber at concentrations from well below...