Determining Firebrand Generation Rate Using Physics-Based Modelling from Experimental Studies through Inverse Analysis by Amila Wickramasinghe, Nazmul Khan, Khalid Moinuddin

“…First, we simulated Douglas-fir (<i>Pseudotsuga menziesii</i>) tree-burning and quantified firebrand generation against the tree burning experiment conducted at the National Institute of Standards and Technology (NIST). …”
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Wildfire disturbance reveals evidence of ecosystem resilience and precariousness in a forest–grassland mosaic by Nicholas P. Hamilton, Philip J. Burton

“…In Interior British Columbia, Canada, there are complex forest–grassland mosaics within the Interior Douglas‐fir biogeoclimatic zone. Historically, both grassland and forest ecosystems experienced high‐frequency, low‐severity fire regimes. …”
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Accounting for density reduction and structural loss in standing dead trees: Implications for forest biomass and carbon stock estimates in the United States by Domke Grant M, Woodall Christopher W, Smith James E

“…At a regional scale, incorporating adjustment factors decreased standing dead quaking aspen biomass estimates by almost 50 percent in the Lake States and Douglas-fir estimates by more than 36 percent in the Pacific Northwest.…”
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Pure and even-aged forestry of fast-growing conifers under climate change: on the need for a silvicultural paradigm shift by Clémentine Ols, Jean-Daniel Bontemps

“…Growth trends over the 2006–2016 period exhibited a significant negative association with the absolute growth level in 2006, with the strongest negative growth trends found for emblematic PEA forestry species (e.g. Norway spruce and Douglas fir), and the strongest positive trends for pine species (e.g. …”
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Spatial relationships and mesoscale habitat variance in co-occurring populations of Church’s sideband and Trinity bristle snail in the Greater Trinity Basin, northern California by Robert M. Sullivan

“…The most common forest-type for M. churchi was Sierra Mixed Conifer (39.9%) and Douglas fir (28.9%). In M. setosa the most common forest-types were the same but in much different percentages (78.8% and 14.8%, respectively). …”
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Silvicultural potential of the main introduced tree species in the Czech Republic – review by Novotný Stanislav, Gallo Josef, Baláš Martin, Kuneš Ivan, Fuchs Zdeněk, Brabec Pavel

“…The main non-native tree species used in the Czech Republic are: black locust (Robinia pseudoacacia L.), Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco), grand fir (Abies grandis [Douglas ex D. …”
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WANDA, a regional dynamic nitrogen model (With Aggregated Nitrogen DynAmics) for nitrate leaching from forests by A. Tietema, A. Tietema

“…The nitrate concentrations in the Douglas fir stands were higher, and in the beech stands lower, than those observed in the locations with other tree species. …”
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Fuel layer specific pollutant emission factors for fire prone forest ecosystems of the western U.S. and Canada by Shawn P. Urbanski, Russell W. Long, Hannah Halliday, Emily N. Lincoln, Andrew Habel, Matthew S. Landis

“…Our study addresses this need with laboratory experiments measuring EFs for carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), ethyne (C2H2), formaldehyde (H2CO), formic acid (CH2O2), hydrogen cyanide (HCN), fine particulate matter (PM2.5), nitric oxide (NO), nitrogen dioxide (NO2), sulfur dioxide (SO2), and total reduced sulfur (TRS) for the burning of individual fuel components from three forest ecosystems which account for a large share of wildfire burned area and emissions in the western United States and Canada - Douglas fir, ponderosa pine, and black spruce/jack pine.…”
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Enzymatic hydrolyzing performance of <it>Acremonium cellulolyticus </it>and <it>Trichoderma reesei </it>against three lignocellulosic materials by Murakami Katsuji, Inoue Hiroyuki, Fang Xu, Fujii Tatsuya, Sawayama Shigeki

“…</p> <p>Results</p> <p>We compared <it>A. cellulolyticus </it>and <it>T. reesei </it>cellulase activity against the three lignocellulosic materials: eucalyptus, Douglas fir and rice straw. Saccharification analysis using the supernatant from each culture demonstrated that the enzyme mixture derived from <it>A. cellulolyticus </it>exhibited 2-fold and 16-fold increases in Filter Paper enzyme and β-glucosidase specific activities, respectively, compared with that derived from <it>T. reesei</it>. …”
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Sympatric breeding occurrence of two call types of Evening Grosbeak in Western Wyoming by Konshau W. Duman, Thomas P. Hahn

“…We most frequently encountered both types in Douglas Fir (Pseudotsuga menziesii Mirb. Franco) or Subalpine Fir (Abies lasiocarpa (Hook.) …”
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Introduction to the Special Issue: TransdisciplinaryApproaches to Language Learning and Teaching in Transnational Times by Julie S. Byrd Clark

“…Building upon the recent article by the Douglas Fir Group (2016), “A transdisciplinary framework for SLA in a multilingual world,” and taking account of some of the current initiatives in the literature that seek to open up the teaching of national standard languages to sociolinguistic variation, translation practices, multimodal activities, and translanguaging (e.g., Canagarajah, 2011; García & Wei, 2014 Kern, 2011; Kramsch & Malinowski, 2014), this special issue seeks to broaden these efforts further. …”
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Explant, Medium, and Plant Growth Regulator (PGR) Affect Induction and Proliferation of Callus in <i>Abies koreana</i> by Ge Guo, Byoung Ryong Jeong

“…The Murashige and Skoog (MS) medium was the most effective of the three media used in this study, namely MS, Douglas fir cotyledon revised (DCR), and Quoirin and Lepoivre (LP) media, with the highest callus induction ratio of stem segments being 100.0%. …”
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Evaluating Predictive Models of Tree Foliar Moisture Content for Application to Multispectral UAS Data: A Laboratory Study by Lauren E. Lad, Wade T. Tinkham, Aaron M. Sparks, Alistair M. S. Smith

“…To achieve this, water was withheld from groups of Douglas-fir and western white pine saplings. Then, measurements of each sapling’s foliar moisture content (FMC) and spectral reflectance were converted to BER of a consumer-grade multispectral camera commonly used on UAS. …”
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Predicting fundamental climate niches of forest trees based on species occurrence data by Yueru Zhao, Gregory A. O'Neill, Tongli Wang

“…In this study, we explored building a fundamental climate niche model using widely available species occurrence data with two important forest tree species, lodgepole pine (Pinus contorta Dougl. ex Loud.) and Douglas-fir (Pseudotsuga menziesii Franco.), which were introduced to many countries worldwide. …”
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Phylogenetic analyses allow species-level recognition of Leptographium wageneri varieties that cause black stain root disease of conifers in western North America by Daram Choi, Daram Choi, Thomas C. Harrington, David C. Shaw, Jane E. Stewart, Ned B. Klopfenstein, Duncan R. Kroese, Mee-Sook Kim

“…Three host-specialized varieties of this pathogen were previously described: L. wageneri var. wageneri on pinyon pines (Pinus monophylla and P. edulis); L. wageneri var. ponderosum, primarily on hard pines (e.g., P. ponderosa, P. jeffreyi); and L. wageneri var. pseudotsugae on Douglas-fir (Pseudotsuga menziesii). Morphological, physiological, and ecological differences among the three pathogen varieties have been previously determined; however, DNA-based characterization and analyses are needed to determine the genetic relationships among these varieties. …”
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The impact of juvenile tree species canopy on properties of new forest floor by D. Kacálek, D. Dušek, J. Novák, J. Bartoš

“…The forest floor nutrient concentrations appeared to be dependent on the presence of admixed deciduous tree species (sycamore maple, small-leaved linden and European larch) as these forest floors (EL1, EL2, NS3, SM) were higher in base cations and phosphorus compared to pure spruce (NS1, NS2) and pure Douglas fir (DF) treatments. The first axis of PCA ordination plot revealed 45% of total variability and showed a clear distinction between evergreen coniferous and mixed species treatments. …”
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Recurring wildfires provoke type conversion in dry western forests by Deborah G. Nemens, Kathryn R. Kidd, J. Morgan Varner, Brian Wing

“…Greatest shifts were documented in sites that burned twice at high severity, where resulting vegetation was dominated by oak sprout clumps and resprouting and fire‐stimulated montane chaparral species, while unburned and low‐severity strata retained a substantial component of Douglas‐fir (Pseudotsuga menziesii) and white fir. Results suggest that repeated moderate‐ and high‐severity fires can result in ecosystem state shifting toward fire‐resilient oak‐shrub communities in this fire‐prone landscape. …”
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Initial Floristic Response to High Severity Wildfire in an Old-Growth Coast Redwood (<i>Sequoia sempervirens</i> (D. Don) Endl.) Forest by Mojgan Mahdizadeh, Will Russell

“…Wilbur) (75%), Pacific madrone (<i>Arbutus menziesii</i> Pursh) (71%), and the lowest survival recorded for the canopy codominant Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) (15%). …”
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Bayesian integration of flux tower data into a process-based simulator for quantifying uncertainty in simulated output by R. Raj, C. van der Tol, N. A. S. Hamm, A. Stein

“…We used GPP partitioned from flux tower measurements of a net ecosystem exchange over a 55-year-old Douglas fir stand as an example. The uncertainties of both the Biome-BGC parameters and the simulated GPP values were estimated. …”
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Relationships between wood properties and fire performance of glulam columns made from six wood species commonly used in China by Xiang Li, Kong Yue, Lei Zhu, Chenglong Lv, Jinhao Wu, Peng Wu, Quan Li, Chao Xu, Keping Sun

“…This study examined the charring rate and residual bearing capacity of glulam columns made from six commonly used wood species in China: poplar, Chinese fir, Douglas fir, hemlock, larch, and spruce. These materials exhibited densities ranging between 390 and 645 kg·m−³. …”
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