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Displaying 11,781 - 11,790 of 65,188 Publications- When considering soils in the context of climate regulation, thoughts most often turn to soil organic carbon (SOC) stocks. However, over geologic time scales, a large part of the earth's C cycle is controlled by the weathering of silicate minerals and carbonates, as well as the formation of pedogenic carbonates. This is the role of mineralogy in the earth's inorganic C cycle.AuthorsKatherine A. Heckman, Craig RasmussenKeywordsSourceChapter 4. In: Horwath, William R.; Kuzyakov, Yakov, eds. Climate change impacts on soil processes and ecosystem properties. Elsevier B.V: 93-110.Year2018
- Much of the family-forest-owned land in the United States is expected to change hands as current ownerships grow older and pass on their holdings. To date, little research has been conducted on this ownership decision. Using mail survey data from the northeastern United States, we explore family-forest-owner (FFO) legacy planning. We summarized FFO interest in planning for the future use of their land. We found that nearly 50% of respondents believe that controlling future use of their land is important; and one-half to two-thirds of respondents are open to keeping most or all of their...AuthorsMarla Markowski-Lindsay, Paul Catanzaro, Kathleen Bell, David Kittredge, Ezra Markowitz, Jessica Leahy, Brett J. Butler, Anita Milman, Shorna AllredSourceJournal of ForestryYear2018
- Polyamines (PAs) are essential biomolecules that are known to be involved in the regulation of many plant developmental and growth processes as well as their response to different environmental stimuli. Maintaining the cellular pools of PAs or their metabolic precursors and by-products is critical to accomplish their normal functions. Therefore, the titre of PAs in the cells must be under tight regulation to enable cellular PA homeostasis. Polyamine homeostasis is hence achieved by the regulation of their input into the cellular PA pool, their conversion into secondary metabolites, their...AuthorsWegi Wuddineh, Rakesh Minocha, Subhash C. MinochaKeywordsSourceIn: Alcazar, Ruben; Tiburcio, Antonio F., eds. Polyamines: Methods and Protocols, Methods in Molecular Biology, vol. 1694. © Springer Science+Business Media LLC: 1-23.Year2018
- Two lightning stroke data sets for the same time period from a 7854 sq.km. area in the Black Hills, South Dakota USA , one from Vaisala and the other from WSI (Weather Services International now The Weather Company) were compared with respect to number of events, number of positive and negative strokes, amplitude and number of subevents. There was also an attempt to match strokes between the two data sets. The first stroke recorded for each data set took place on June 15 2012 at 3:49 PM MDT and the last stroke for each data set occurred on June 26 2012 at 2:58 PM MDT. The WSI data set has...AuthorsKathy Gray, Don Latham, Paul A. SopkoSourceIn: 25th International Lightning Detection Conference & 7th International Lightning Meteorology Conference; March 12-15, 2018; Ft. Lauderdale, Fl. Vaisala. 7 p.Year2018
- The measurement and characterization of wildland fuel matrices in ways that are relevant to both fire managers and scientists remains challenging. Wildland fuel characterization differs markedly from the characterization of fuels in the built environment, as these fuels are comprised of the components of dynamic ecosystems where change is a constant. This problem is confounded by the spatial and temporal extents and resolutions at which fuels are to be measured. Additionally, the number of variables that must be considered can make fuel characterization efforts seem intractable. However,...AuthorsNicholas Skowronski, Michael R. GallagherKeywordsSourceIn: Manzello, S., ed. Encyclopedia of wildfires and wildland-urban interface (WUI) fires. Cham: Springer. 10 p.Year2018
- The occurrence (probability) and extent (proportion) of tree internal stem decay are important attributes influencing potential wood quality and value, but variation in decay by species, tree size and geographic range are rarely evaluated and modelled. In this analysis, we used 1246 destructively sampled trees across 33 species in the northeastern United States and New Brunswick, Canada to determine the factors influencing the combined probability and proportion of decay. In the process, we evaluated three modelling approaches including a two-part conditional model, multinomial model and...AuthorsJereme Frank, Mark Castle, Jim Westfall, Aaron Weiskittel, David MacFarlane, Sharad Baral, Philip Radtke, Gaetan PelletierSourceForestryYear2018
- We used an experimental design to analyze factors affecting participation rates for family forest owner outreach campaigns. Through logistic regression, we assessed the participation rates as a function of campaign and landowner attributes. Participation rates ranged from 3% to 14%. Owners offered a publication were on average 4.3 times more likely to participate than those offered a forester visit. Owners with a college degree were on average 1.5 times more likely to participate than those with lower levels of formal education. Extension and other outreach professionals can use knowledge...AuthorsBrett J. Butler, Sarah M. Butler, Kelley Dennings, Tricia Gorby. KnootSourceJournal of Extension. 56(7): 7RIB3. 26 p.Year2018
- Our ability to predict the identity of future invasive alien species is largely based upon knowledge of prior invasion history. Emerging alien species—those never encountered as aliens before—therefore pose a significant challenge to biosecurity interventions worldwide. Understanding their temporal trends, origins, and the drivers of their spread is pivotal to improving prevention and risk assessment tools. Here, we use a database of 45,984 first records of 16,019 established alien species to investigate the temporal dynamics of occurrences of emerging alien species worldwide. Even after...AuthorsHanno Seebens, Tim M. Blackburn, Ellie E. Dyer, Piero Genovesi, Philip E. Hulme, Jonathan M. Jeschke, Shyama Pagad, Petr Pyšek, Mark van Kleunen, Marten Winter, Michael Ansong, Margarita Arianoutsou, Sven Bacher, Bernd Blasius, Eckehard G. Brockerhoff, Giuseppe Brundu, César Capinha, Charlotte E. Causton, Laura Celesti-Grapow, Wayne Dawson, Stefan Dullinger, Evan P. Economo, Nicol Fuentes, Benoit Guénard, Heinke Jäger, John Kartesz, Marc Kenis, Ingolf Kühn, Bernd Lenzner, Andrew M. Liebhold, Alexander Mosena, Dietmar Moser, Wolfgang Nentwig, Misako Nishino, David Pearman, Jan Pergl, Wolfgang Rabitsch, Julissa Rojas-Sandoval, Alain Roques, Stephanie Rorke, Silvia Rossinelli, Helen E. Roy, Riccardo Scalera, Stefan Schindler, Kateřina Štajerová, Barbara Tokarska-Guzik, Kevin Walker, Darren F. Ward, Takehiko Yamanaka, Franz EsslKeywordsSourceProceedings of the National Academy of SciencesYear2018
- Imputation models were developed to predict seedling regeneration density and composition on National Forest System (NFS) lands in Oregon and Washington. The models were based on Forest Inventory and Analysis and Pacific Northwest Regional NFS Monitoring data. Individual models were developed based on broad forest plant association groups (FPAGs) with all model development and analysis conducted in R using a most similar neighbor-like imputation approach. Model performance was evaluated based on bias, mean absolute deviation, root mean-squared error (RMSE), and error rate in correctly...AuthorsKarin Kralicek, Andrew J. Sánchez Meador, Leah C. RathbunKeywordsSourceForest Ecology and Management. 409: 667-682.Year2018
- Cost-effective strategic management of aerial forest fire suppression resources involves decisions about fleet location, in order to efficiently match supply and demand. In this study, we explore the flexible design of such a system, pooling the demand of several bases into a “zone”, and analyzing alternative partitions of the territory into zones. Feasible partitions consider an upper limit on the distance between bases, and require their adjacency, within the same zone. Then, we classify the feasible partitions according to a set of six criteria and explore the non-dominated partitions....AuthorsHugo Torres, Abilio Pereira Pacheco, Joao Claro, Michele Salis, Matthew P. Thompson, Crystal S. Stonesifer, Gavino Diana, Silvio CoccoKeywordsSourceIn: Viegas, Domingos Xavier, ed. Advances in Forest Fire Research 2018. Coimbra, Portugal: University of Coimbra, ADAI/CEIF. https://doi.org/10.14195/978-989-26-16-506_158.Year2018