Treesearch
Displaying 10,311 - 10,320 of 65,202 Publications- The western United States is home to many woodpecker species that are strongly associated with recently disturbed forests, including post wildfire and post-beetle outbreaks. These types of landscapes are favored habitat because the dead and dying trees provide nesting and foraging substrates. When managing these landscapes, managers must balance providing habitat for woodpeckers considered species of conservation concern with conducting salvage logging sales that generate economic revenue for the surrounding communities. Until recently, managers couldn't be certain where suitable woodpecker...AuthorsAndrea Watts, Vicki A. Saab, Steve Beverlin, Mark WebbKeywordsSourceScience You Can Use Bulletin, Issue 38. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 11 p.Year2019
- The temperature response of photosynthesis is one of the key factors determining predicted responses to warming in global vegetation models (GVMs). The response may vary geographically, owing to genetic adaptation to climate, and temporally, as a result of acclimation to changes in ambient temperature. Our goal was to develop a robust quantitative global model representing acclimation and adaptation of photosynthetic temperature responses. We quantified and modelled key mechanisms responsible for photosynthetic temperature acclimation and adaptation using a global dataset of photosyntheti...AuthorsDushan P. Kumarathunge, Belinda E. Medlyn, John E. Drake, Mark G. Tjoelker, Michael J. Aspinwall, Michael Battaglia, Francisco J. Cano, Kelsey R. Carter, Molly A. Cavaleri, Lucas A. Cernusak, Jeffrey Q. Chambers, Kristine Y. Crous, Martin G. De Kauwe, Dylan N. Dillaway, Erwin Dreyer, David S. Ellsworth, Oula Ghannoum, Qingmin Han, Kouki Hikosaka, Anna M. Jensen, Jeff W. G. Kelly, Eric L. Kruger, Lina M. Mercado, Yusuke Onoda, Peter B. Reich, Alistair Rogers, Martijn Slot, Nicholas G. Smith, Lasse Tarvainen, David T. Tissue, Henrique F. Togashi, Edgard S. Tribuzy, Johan Uddling, Angelica Vårhammar, Göran Wallin, Jeffrey M. Warren, Danielle A. WayKeywordsSourceNew PhytologistYear2019
- Winter recreation is a popular outdoor activity that is expected to increase in intensity due to new recreation technology and human population growth in the United States. RMRS researchers and partners studied impacts of dispersed (skiing and snowmobiling) and developed (ski areas) winter recreation on Canada lynx in Colorado. They used data from GPS devices carried by recreators to record their tracks and GPS collars to monitor movements of adult lynx to see how they overlapped. They didn’t find any consistent evidence that lynx avoided areas of low to moderate dispersed recreation. Lynx...AuthorsSue Miller, Lucretia E. Olson, John R. Squires, Elizabeth Roberts, Jake IvanKeywordsSourceScience You Can Use Bulletin, Issue 33. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 12 p.Year2019
- The two-part Science Framework for Conservation and Restoration of the Sagebrush Biome published by the U.S. Forest Service Rocky Mountain Research Station is a new, multiscale approach to management of sagebrush ecosystems. The product of an extensive collaboration between State and Federal agencies and universities, it employs science on ecological resilience to disturbance and resistance to invasive species (like cheatgrass), along with Greater sage-grouse habitat requirements, to improve conservation planning and help prioritize management actions. Prioritized areas and management...AuthorsSue Miller, Jeanne C. Chambers, Michele Crist, Susan Ellsworth, Kenneth E. MayerKeywordsSourceScience You Can Use Bulletin, Issue 34. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 20 p.Year2019
- Ecological stoichiometry affects the processes and functions of ecosystems, but the similarities and differences of stoichiometric characteristics among diverse agropastoral ecosystems under the same climatic conditions remain unclear. In this study, plant and soil stoichiometric characteristics of different agroecosystems, namely natural grassland (free-grazing and mowed grassland), artificial grassland (oat, Chinese leymus and corn silage), field crops (naked oats, flax and wheat) and commercial crops (cabbage and potatoes), were investigated in Guyuan County, China. Results showed total...AuthorsXiajie Zhai, Kesi Liu, Deborah M. Finch, Ding Huang, Shiming Tang, Shuiyan Li, Hongfei Liu, Kun WangSourceSoil Research. 57: 875-882.Year2019
- Soil erosion is a serious phenomenon which can be accelerated beyond sustainable levels by anthropogenic activities such as military training. Soil erosion modeling can be utilized in an effort to identify accelerated erosion and concomitant sedimentation before they reach unsustainable levels. Regrettably, most models are deficient in the way they account for topographic heterogeneity. While occasionally producing reasonable estimates of total soil erosion and sediment production from within a watershed, they provide no information regarding sources and sinks of eroded sediments within...AuthorsSteve D. Warren, Thomas S. Ruzycki, William N. PizzolatoSourceFlorida Scientist. 82(2-3): 53-62.Year2019
- Enzymatic conversion of cellulosic biomass into fermentable sugars such as glucose is a slow and catalytically ineûcient process, largely due to limited accessibility of cellulose. Cellulose crystallinity can be reduced to increase substrate accessibility toward cellulolytic enzymes by either swelling or dissolving biomass in chemicals such as concentrated acids (e.g., phosphoric acid or H3PO4, sulfuric acid or H2SO4) or ionic liquids. Phosphoric acid swollen cellulose (PASC) is one such highly digestible form of regenerated amorphous cellulose (RAC), enriched along with some cellulose-II...AuthorsShishir P. S. Chundawat, Umesh P. AgarwalKeywordsSourceChapter 5. In: Understanding Lignocellulose: Synergistic Computational and Analytic Methods. ACS Symposium Series. Washington, DC: American Chemical Society: 69-88.Year2019
- Wildland firefighters work in complex and dynamic environments, with many dangers that pose serious threats to their safety. Falling snags and rocks, steep and rugged terrain, and rapid increases in fire behavior are just some of the dangers that affect wildland firefighters. Because of the many possible ways that firefighters have been or could be injured, various safety protocols have been developed in the United States to help mitigate the hazards, including the standard firefighting orders (McArdle 1957) and LCES (lookouts, communications, escape routes, and safety zones) (Gleason...AuthorsWesley Page, Bret W. ButlerSourceFire Management Today. 77(3): 16-19.Year2019
- Previous attempts to identify the environmental factors associated with firefighter entrapments in the United States have suggested that there are several common denominators. Despite the widespread acceptance of the assumed commonalities, few studies have quantified how often entrapments actually meet these criteria. An analysis of the environmental conditions at the times and locations of 166 firefighter entrapments involving 1202 people and 117 fatalities that occurred between 1981 and 2017 in the conterminous United States revealed some surprising results. Contrary to general assumption...AuthorsWesley Page, Patrick Freeborn, Bret W. Butler, W. Matt JollyKeywordsSourceFire. 2: 52.Year2019
- To ensure the safety of trees, two NDT (nondestructive testing) techniques, electric resistance tomography and stress wave tomography, were employed to quantitatively detect and characterize the internal decay of standing trees. Comparisons between those two techniques were done to make full use of the individual capability for decay detection.AuthorsXiaoquan Yue, Lihai Wang, James Wacker, Zhiming ZhuKeywordsSourcePeerJ. 7(4): e6444-. https://doi.org/10.7717/peerj.6444.Year2019