A5006902251- Forest Insect Ecology and Management
- Forest Ecology and Biodiversity Studies
- Fire effects on ecosystems
- Insect and Pesticide Research
- Insect-Plant Interactions and Control
- Entomological Studies and Ecology
- History and Developments in Astronomy
- Insect and Arachnid Ecology and Behavior
- Forest ecology and management
- Coleoptera Taxonomy and Distribution
- Insect behavior and control techniques
- Plant and animal studies
- Plant and Fungal Interactions Research
- Entomopathogenic Microorganisms in Pest Control
- Insect Pest Control Strategies
- Hemiptera Insect Studies
- Orthoptera Research and Taxonomy
- Fossil Insects in Amber
- Insect Resistance and Genetics
- Diptera species taxonomy and behavior
- Lepidoptera: Biology and Taxonomy
- Parasite Biology and Host Interactions
- Forest Management and Policy
- Insects and Parasite Interactions
- Plant Pathogens and Fungal Diseases
Rocky Mountain Research Station
2015-2024
US Forest Service
2011-2023
Rocky Mountain Research (United States)
2017-2023
United States Department of Agriculture
2014-2019
Ecological Society of America
2018
University of Wisconsin–Madison
2010
Forest Products Laboratory
2010
Louisiana State University Agricultural Center
1985-1991
Climatic changes are predicted to significantly affect the frequency and severity of disturbances that shape forest ecosystems. We provide a synthesis climate change effects on native bark beetles, important mortality agents conifers in western North America. Because differences temperature-dependent life-history strategies, including cold-induced developmental timing, responses warming will differ among within beetle species. The success populations also be influenced indirectly by...
The potentials of deteriorated mountain pine beetle (Dendroctonus ponderosae)-killed lodgepole (Pinus contorta) trees for cellulosic ethanol production were evaluated using the sulfite pretreatment to overcome recalcitrance lignocellulose (SPORL) process. harvested from two sites in United States Arapaho-Roosevelt National Forest, Colorado. infestation age varied zero about 8 years. Mild (170 °C) and harsh (180 SPORL pretreatments conducted. chemical charges sulfuric acid 2.21% sodium...
Abstract Disturbances are increasing globally due to anthropogenic changes in land use and climate. This study determines whether a disturbance that affects the physiology of individual trees can be used predict response ecosystem by weighing two competing hypothesis at annual time scales: (a) fluxes proportional observable patterns mortality or (b) explain dying must also incorporated. We evaluate these hypotheses analyzing 6 years eddy covariance flux data collected throughout progression...
In Colorado and southern Wyoming, mountain pine beetle (MPB) has affected over 1.6 million ha of predominantly lodgepole forests, raising concerns about effects MPB-caused mortality on subsequent wildfire risk behavior. Using empirical data we modeled potential fire behavior across a gradient wind speeds moisture scenarios in Green stands compared three stages since MPB attack (Red [1–3 yrs], Grey [4–10 Old-MPB [∼30 yrs]). killed 50% the trees 70% basal area Red stages. Across scenarios,...
In recent years, the mountain pine beetle, Dendroctonus ponderosae Hopkins, has impacted >8.9 million hectares of forests in western United States. During endemic populations, trees weakened by other agents are often colonized D. but may be difficult to detect due their scarcity. Once populations reach incipient levels, tree defenses insufficient deterring mass attacks, and rapidly increase causing substantial levels mortality under certain circumstances. There two general approaches for...
Abstract A mountain pine beetle outbreak in Colorado lodgepole forests has altered stand and fuel characteristics that affect potential fire behavior. Using the Fire Fuels Extension to Forest Vegetation Simulator, behavior was modeled for uninfested beetle-affected plots 7 years after initiation 10 80% projected tree fall using measured characteristics. Under 90th percentile weather conditions, exhibited proportionally more crown than infested plots. Plots predicted have were composed mainly...
Mountain pine beetle killed Lodgepole (Pinus contorta Douglas ex Loudon) wood chips were pretreated using an acidic sulfite solution of approximately pH = 2.0 at a liquor to ratio 3 and sodium bisulfite loading 8 wt % on wood. The combined hydrolysis factor (CHF), formulated from reaction kinetics, was used design scale-up pretreatment 2000 g relatively low temperature 165 °C that reduced furan formation facilitated high solids saccharification fermentation. disk milled together result in...
Abstract Numerous wildfires in recent years have highlighted managers' needs for reliable tools to predict postfire mortality of ponderosa pine (Pinus Dougl. ex Laws.) trees. General applicability existing models is uncertain, as researchers used different sets variables. We quantified tree attributes, crown and bole fire damage, ground severity, insect presence from a total 5,083 trees four 2000 Intermountain states. Crown scorch (percentage) consumption volume collectively accounted the...
The mountain pine beetle (MPB) (Dendroctonus ponderosae) is one of the most prevalent disturbance agents in western conifer forests. It utilizes various species pines (Pinus spp.) as host trees. Eruptive populations can cause extensive tree mortality. Since late 1990s, outbreaks have occurred from southern Rockies to British Columbia. In Colorado, lodgepole (P. contorta) forests been affected. 1996, about 3.4 million acres and ponderosa ponderosa) exhibited MPB-caused A large portion larger...
Field experiments were conducted during 1983 and 1984 to evaluate effects of Nezara viridula (L.) feeding damage field corn. Two adult N. per plant on V15-stage plants caused significant reductions in ear weight length. No seed observed at any infestation level evaluated. Results indicated that is most intense younger yield can be attributed total loss rather than kernel weight.
Spruce beetle (Dendroctonus rufipennis) outbreaks are rapidly spreading throughout subalpine forests of the Rocky Mountains, raising concerns that altered fuel structures may increase ecological severity wildfires. Although many recent studies have found no conclusive link between and increased fire size or canopy mortality, few addressed whether these combined disturbances produce compounded effects on short-term vegetation recovery. We tested for an effect spruce outbreak recovery in West...
Abstract Amplified by warming temperatures and drought, recent outbreaks of native bark beetles (Curculionidae: Scolytinae) have caused extensive tree mortality throughout Europe North America. Despite their ubiquitous nature important effects on ecosystems, forest recovery following such disturbances is poorly understood, particularly across regions with varying abiotic conditions outbreak effects. To better understand post‐outbreak a topographically complex region, we synthesized data from...