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Articles 1771 - 1800 of 11484
Full-Text Articles in Forest Sciences
Coarse Woody Debris Decomposition Assessment Tool: Model Validation And Application, Zhaohua Dai, Carl C. Trettin, Andrew J. Burton, Martin F. Jurgensen, Deborah S. Page-Dumroese, Brian T. Forschler, Jonathan S. Schilling, Daniel L. Lindner
Coarse Woody Debris Decomposition Assessment Tool: Model Validation And Application, Zhaohua Dai, Carl C. Trettin, Andrew J. Burton, Martin F. Jurgensen, Deborah S. Page-Dumroese, Brian T. Forschler, Jonathan S. Schilling, Daniel L. Lindner
Aspen Bibliography
Coarse woody debris (CWD) is a significant component of the forest biomass pool; hence a model is warranted to predict CWD decomposition and its role in forest carbon (C) and nutrient cycling under varying management and climatic conditions. A process-based model, CWDDAT (Coarse Woody Debris Decomposition Assessment Tool) was calibrated and validated using data from the FACE (Free Air Carbon Dioxide Enrichment) Wood Decomposition Experiment utilizing pine (Pinus taeda), aspen (Populous tremuloides) and birch (Betula papyrifera) on nine Experimental Forests (EF) covering a range of climate, hydrology, and soil conditions across the continental USA. …
Coarse Woody Debris Decomposition Assessment Tool: Model Validation And Application, Zhaohua Dai, Carl C. Trettin, Andrew Burton, Martin Jurgensen, Deborah S. Page-Dumroese, Brian T. Forschler, Jonathan S. Schilling, Daniel L. Lindner
Coarse Woody Debris Decomposition Assessment Tool: Model Validation And Application, Zhaohua Dai, Carl C. Trettin, Andrew Burton, Martin Jurgensen, Deborah S. Page-Dumroese, Brian T. Forschler, Jonathan S. Schilling, Daniel L. Lindner
Michigan Tech Publications, Part 1
Coarse woody debris (CWD) is a significant component of the forest biomass pool; hence a model is warranted to predict CWD decomposition and its role in forest carbon (C) and nutrient cycling under varying management and climatic conditions. A process-based model, CWDDAT (Coarse Woody Debris Decomposition Assessment Tool) was calibrated and validated using data from the FACE (Free Air Carbon Dioxide Enrichment) Wood Decomposition Experiment utilizing pine (Pinus taeda), aspen (Populous tremuloides) and birch (Betula papyrifera) on nine Experimental Forests (EF) covering a range of climate, hydrology, and soil conditions across the continental USA. The model predictions were evaluated against …
Smokejumper Obituary: Graham, David James "Dave" (Redding 1970), National Smokejumper Association
Smokejumper Obituary: Graham, David James "Dave" (Redding 1970), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Environmental Perception In Colombia's Páramo Protected Areas, Juliana Delgado
Environmental Perception In Colombia's Páramo Protected Areas, Juliana Delgado
LSU Master's Theses
This thesis analyzes the gap between farmers' environmental perceptions in Téquita, a small village in Colombia, and the definition of protected areas has led to a conflict for the use of natural resources. I examine if the protected area's policies have dealt with the social and ecological issues in the páramos and recognized the social construction of the landscape, farmers' identities, and their interpretations about work and land. The case study focuses on Güina High Mountain in the Guantiva-La Rusia páramo complex, which recently the Colombian government declared as a protected area. In light of anthropologist Tim Ingold's meaning of …
Smokejumper Obituary: Crown, Walter Lewis (Missoula 1948), National Smokejumper Association
Smokejumper Obituary: Crown, Walter Lewis (Missoula 1948), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
The Motion Of Trees In The Wind: A Data Synthesis, Toby D. Jackson, Sarab Sethi, Ebba Dellwik, Nikolas Angelou, Amanda Bunce, Tim Van Emmerik, Mark Rudnicki, Et. Al.
The Motion Of Trees In The Wind: A Data Synthesis, Toby D. Jackson, Sarab Sethi, Ebba Dellwik, Nikolas Angelou, Amanda Bunce, Tim Van Emmerik, Mark Rudnicki, Et. Al.
Michigan Tech Publications, Part 1
Interactions between wind and trees control energy exchanges between the atmosphere and forest canopies. This energy exchange can lead to the widespread damage of trees, and wind is a key disturbance agent in many of the world's forests. However, most research on this topic has focused on conifer plantations, where risk management is economically important, rather than broadleaf forests, which dominate the forest carbon cycle. This study brings together tree motion time-series data to systematically evaluate the factors influencing tree responses to wind loading, including data from both broadleaf and coniferous trees in forests and open environments. We found that …
Assessing Climate Change Impacts On Live Fuel Moisture And Wildfire Risk Using A Hydrodynamic Vegetation Model, Wu Ma, Lu Zhai, Alexandria Pivovaroff, Jacquelyn Shuman, Polly Buotte, Junyan Ding, Bradley O. Christoffersen, Ryan G. Knox, Max Moritz, Rosie A. Fisher
Assessing Climate Change Impacts On Live Fuel Moisture And Wildfire Risk Using A Hydrodynamic Vegetation Model, Wu Ma, Lu Zhai, Alexandria Pivovaroff, Jacquelyn Shuman, Polly Buotte, Junyan Ding, Bradley O. Christoffersen, Ryan G. Knox, Max Moritz, Rosie A. Fisher
School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)
Live fuel moisture content (LFMC) plays a critical role in wildfire dynamics, but little is known about responses of LFMC to multivariate climate change, e.g., warming temperature, CO2 fertilization, and altered precipitation patterns, leading to a limited prediction ability of future wildfire risks. Here, we use a hydrodynamic demographic vegetation model to estimate LFMC dynamics of chaparral shrubs, a dominant vegetation type in fire-prone southern California. We parameterize the model based on observed shrub allometry and hydraulic traits and evaluate the model's accuracy through comparisons between observed and simulated LFMC of three plant functional types (PFTs) under current climate conditions. …
Smokejumper Magazine, July 2021, National Smokejumper Association
Smokejumper Magazine, July 2021, National Smokejumper Association
Smokejumper and Static Line Magazines
This issue of the National Smokejumper Association (NSA) Smokejumper Magazine contains the following articles: Message from the President; A Fire Season That Still Haunts Me; 1996 Malheur N.F.; View from a Spotter; Grassroots—Challenges of Being a Current Smokejumper; Arctic National Wildlife Refuge Wildfire; Doug Bell—Missoula 1958; Sounding Off from the Editor; Should You Draw the Short Straw; A New Day for the Forest Service; Complexities of Afghanistan; Notes from the Ranks; Recording Smokejumper History; The Jump List, Men of the '40s; Odds and Ends; Organizations and Human Nature; Jump at the Chance!; Travis Atkins Awarded Medal of Honor; Where Have …
Beaver Reintroduction And Its Potential As An Ecological Conservation Measure For At-Risk Amphibian Species In The Pacific Northwest, Danielle Schwantes
Beaver Reintroduction And Its Potential As An Ecological Conservation Measure For At-Risk Amphibian Species In The Pacific Northwest, Danielle Schwantes
University Honors Theses
Amphibian decline is a major concern in the Pacific Northwest (PNW), with many amphibian species listed as sensitive, threatened or endangered throughout the region. Some of the predicted main causes of amphibian decline are climate change and loss of habitat. The reintroduction of beavers into ecoregions of the PNW could be an important step in the conservation of this region’s amphibians, due to the beaver’s ability to engineer and structurally manipulate forest ecosystems. Beavers are able to restore wetland quality, productivity and biodiversity, creating vital amphibian habitat. This work explored the linkage between beaver presence and wetland hydrology, geomorphology, landscape …
Effects Of Scarification, Phytohormones, Soil Type, And Warming On The Germination And/Or Seedling Performance Of Three Tamaulipan Thornscrub Forest Species, Paula Luera, Kimberly Wahl-Villarreal, Bradley O. Christoffersen, Abeny Treviño, Pushpa Soti, Christopher A. Gabler
Effects Of Scarification, Phytohormones, Soil Type, And Warming On The Germination And/Or Seedling Performance Of Three Tamaulipan Thornscrub Forest Species, Paula Luera, Kimberly Wahl-Villarreal, Bradley O. Christoffersen, Abeny Treviño, Pushpa Soti, Christopher A. Gabler
School of Earth, Environmental, & Marine Sciences Faculty Publications
The Tamaulipan thornforests of south Texas and northeast Mexico are an ecologically and economically important conservation hotspot. Thornforest restoration is limited by native tree and shrub seedling availability for planting. Seedling shortages arise from low seed availability and knowledge gaps regarding best practices for germinating and growing the 70+ thornforest species desired for restoration plantings. To fill key knowledge gaps, we investigated three ecologically important thornforest species with low or highly variable germination or seedling survival rates: Ebenopsis ebano, Cordia boissieri, and Zanthoxylum fagara. For each, we quantified the effects of different dosages of chemical seed treatments used to promote …
Smokejumper Obituary: Sullivan, Michael Joseph (Missoula 1949), National Smokejumper Association
Smokejumper Obituary: Sullivan, Michael Joseph (Missoula 1949), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Stermitz, Robert Eugene (Missoula 1947), National Smokejumper Association
Smokejumper Obituary: Stermitz, Robert Eugene (Missoula 1947), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Summerfield, Edward Ray "Ed" (North Cascades 1947), National Smokejumper Association
Smokejumper Obituary: Summerfield, Edward Ray "Ed" (North Cascades 1947), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Sparkman Jr., Jerry Turner (Mccall 1946), National Smokejumper Association
Smokejumper Obituary: Sparkman Jr., Jerry Turner (Mccall 1946), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Sutton, Ladd (Mccall 1948), National Smokejumper Association
Smokejumper Obituary: Sutton, Ladd (Mccall 1948), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
A Systems Biology Approach Identifies A Regulator, Bplerf1, Of Cold Tolerance In Betula Platyphylla, Kaiwen Lv, Wenqi Wu, Hairong Wei, Guifeng Liu
A Systems Biology Approach Identifies A Regulator, Bplerf1, Of Cold Tolerance In Betula Platyphylla, Kaiwen Lv, Wenqi Wu, Hairong Wei, Guifeng Liu
Michigan Tech Publications, Part 1
Cold is an abiotic stress that can greatly affect the growth and survival of plants. Here, we reported that an AP2/ERF family gene, BplERF1, isolated from Betula platyphylla played a contributing role in cold stress tolerance. Overexpression of BplERF1 in B. platyphylla transgenic lines enhanced cold stress tolerance by increasing the scavenging capability and reducing H2O2 and malondialdehyde (MDA) content in transgenic plants. Construction of BplERF-mediated multilayered hierarchical gene regulatory network (ML-hGRN), using Top-down GGM algorithm and the transcriptomic data of BplERF1 overexpression lines, led to the identification of five candidate target genes of BplERF1 which include MPK20, …
Smokejumper Obituary: Skidmore, David Clinton (Missoula 1947), National Smokejumper Association
Smokejumper Obituary: Skidmore, David Clinton (Missoula 1947), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Simons, Richard Roy (North Cascades 1960), National Smokejumper Association
Smokejumper Obituary: Simons, Richard Roy (North Cascades 1960), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Siepert, Terrell K. (Mccall 1947), National Smokejumper Association
Smokejumper Obituary: Siepert, Terrell K. (Mccall 1947), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Shallenberger, John Eldon (Cave Junction 1951), National Smokejumper Association
Smokejumper Obituary: Shallenberger, John Eldon (Cave Junction 1951), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Schreiber, George Emerson (Mccall 1947), National Smokejumper Association
Smokejumper Obituary: Schreiber, George Emerson (Mccall 1947), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Sadillo, John Paul (Redding 1966), National Smokejumper Association
Smokejumper Obituary: Sadillo, John Paul (Redding 1966), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Thrash, James Robert (Mccall 1981), National Smokejumper Association
Smokejumper Obituary: Thrash, James Robert (Mccall 1981), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Robertson, Marvin Basil (Fairbanks 1966), National Smokejumper Association
Smokejumper Obituary: Robertson, Marvin Basil (Fairbanks 1966), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Taylor, Phillip E. "Butch" (Redding 1969), National Smokejumper Association
Smokejumper Obituary: Taylor, Phillip E. "Butch" (Redding 1969), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Smokejumper Obituary: Milligan, Thomas "Tom" William (Missoula 1951), National Smokejumper Association
Smokejumper Obituary: Milligan, Thomas "Tom" William (Missoula 1951), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Tree Establishment On Post-Mining Waste Soils: Species, Density, And Mixture Effects, Degi Harja Asmara, Suzanne Allaire, Meine Van Noordwijk, Damase P. Khasa
Tree Establishment On Post-Mining Waste Soils: Species, Density, And Mixture Effects, Degi Harja Asmara, Suzanne Allaire, Meine Van Noordwijk, Damase P. Khasa
Aspen Bibliography
Tree establishment to restore degraded boreal post-mining lands is challenged by low soil productivity, a harsh microclimate, and potentially high contaminant levels. The use of mixed vegetation can facilitate the microclimate but increase competition for soil resources. A statistical accounting of plant–plant interactions and adaptation to multispecies conditions is hard to achieve in field experiments; trials under controlled conditions can distinguish effects of planting density and species interactions in the early stages of plant establishment. A greenhouse trial was established in containers (“mesocosms”) with waste rock or fine tailings from gold mines. Pregerminated (1-week-old) seedlings (Alnus viridis subsp. crispa …
Smokejumper Obituary: Roth, Roger Walter (Mccall 1992), National Smokejumper Association
Smokejumper Obituary: Roth, Roger Walter (Mccall 1992), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.
Bel1-Like Homeodomain Protein Blh6a Is A Negative Regulator Of Cal5h2 In Sinapyl Alcohol Monolignol Biosynthesis In Poplar, Qiao Wang, Xinren Dai, Hongying Pang, Yanxia Cheng, Xiong Huang, Hui Li, Hairong Wei, Et. Al.
Bel1-Like Homeodomain Protein Blh6a Is A Negative Regulator Of Cal5h2 In Sinapyl Alcohol Monolignol Biosynthesis In Poplar, Qiao Wang, Xinren Dai, Hongying Pang, Yanxia Cheng, Xiong Huang, Hui Li, Hairong Wei, Et. Al.
Michigan Tech Publications, Part 1
Lignin is one of the major components of xylem cell walls in tree stems. The lignin in the wood of most flowering plants (dicotyledonous angiosperms) is typically polymerized from three monolignol precursors, coniferyl alcohol, sinapyl alcohol, and p-coumaroyl alcohol, resulting in guaiacyl (G), syringyl (S), and hydroxyphenyl (H) subunits, respectively. In this study, we focus on the transcriptional regulation of a coniferaldehyde 5-hydroxylase (CAld5H2) gene, which encodes a key enzyme for sinapyl alcohol biosynthesis. We carried out a yeast one-hybrid (Y1H) screen to identify candidate upstream transcription factors (TFs) regulating CAld5H2. We obtained 12 upstream TFs …
Smokejumper Obituary: Woodward, Fred Victor (Missoula 1952), National Smokejumper Association
Smokejumper Obituary: Woodward, Fred Victor (Missoula 1952), National Smokejumper Association
Smokejumper Obituaries
No abstract provided.