Treesearch
Displaying 12,231 - 12,240 of 64,636 Publications- NASA's Black Marble nighttime lights product suite (VNP46) is available at 500m resolution since January 2012 with data from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP). The retrieval algorithm, developed and implemented for routine global processing at NASA's Land Science Investigator-led Processing System (SIPS), utilizes all high-quality, cloud-free, atmospheric-, terrain-, vegetation-, snow-, lunar-, and stray light-corrected radiances to estimate daily nighttime lights (NTL) and other intrinsic...AuthorsMiguel O. Román, Zhuosen Wang, Qingsong Sun, Virginia Kalb, Steven D. Miller, Andrew Molthan, Lori Schultz, Jordan Bell, Eleanor C. Stokes, Bhartendu Pandey, Karen C. Seto, Dorothy Hall, Tomohiro Oda, Robert E. Wolfe, Gary Lin, Navid Golpayegani, Sadashiva Devadiga, Carol Davidson, Sudipta Sarkar, Cid Praderas, Jeffrey Schmaltz, Ryan Boller, Joshua Stevens, Olga Ramos, Elizabeth Padilla, José Alonso, Yasmín Detrés, Roy Armstrong, Ismael Miranda, Yasmín Conte, Nitza Marrero, Kytt MacManus, Thomas Esch, Edward J. MasuokaKeywordsSourceRemote Sensing of EnvironmentYear2018
- The long history of fire in North America spans millennia and is recognized as an important driver in the widespread and long-term dominance of oak species and oak natural communities. Frequent wildfires from about 1850 to 1950 resulted in much forest damage, and gained fire a negative reputation. The lack of fire for the past nearly 100 years due to suppression programs is now indicted as a major cause of widespread oak regeneration failures and loss of fire-dependent natural communities. The use of prescribed fire is increasing in forest management and ecosystem restoration. An understand...AuthorsDaniel C. C. Dey, Callie SchweitzerKeywordsSourceForestsYear2018
- Thousand Cankers Disease (TCD) affects Juglans and Pterocarya species. This disease poses not only a major threat to the nut and timber industries but also to native stands of walnut trees. Galleries created by Pityophthorus juglandis (vector) are colonized by the fungus Geosmithia morbida (causal agent of necrosis). It is unknown if other fungi colonizing these galleries might act antagonistically towards G. morbida. The objectives of this study were to: (1) characterize the fungal community associated with TCD-infected trees and (2) develop a pilot study addressing their potential...AuthorsRomina Gazis, Laura Poplawski, William Klingeman, Sarah L. Boggess, Robert N. Trigiano, Andrew D. Graves, Steve J. Seybold, Denita HadziabdicSourceFungal Biology. 122(4): 241-253Year2018
- AuthorsGuillermo Ortiz-Colón, Stephen J. Fain, Isabel K. Parés, Jaime Curbelo-Rodríguez, Esbal Jiménez-Cabán, Melvin Pagán-Morales, William A. GouldKeywordsSourceClimatic ChangeYear2018
- Tree mortality rates appear to be increasing in moist tropical forests (MTFs) with significant carbon cycle consequences. Here, we review the state of knowledge regarding MTF tree mortality, create a conceptual framework with testable hypotheses regarding the drivers, mechanisms and interactions that may underlie increasing MTF mortality rates, and identify the next steps for improved understanding and reduced prediction. Increasing mortality rates are associated with rising temperature and vapor pressure deficit, liana abundance, drought, wind events, fire and, possibly,CO2 fertilization-i...AuthorsNate McDowell, Craig D. Allen, Kristina Anderson-Teixeira, Paulo Brando, Roel Brienen, Jeff Chambers, Brad Christoffersen, Stuart Davies, Chris Doughty, Alvaro Duque, Fernando Espirito-Santo, Rosie Fisher, Clarissa G. Fontes, David Galbraith, Devin Goodsman, Charlotte Grossiord, Henrik Hartmann, Jennifer Holm, Daniel J. Johnson, Abd Rahman Kassim, Michael Keller, Charlie Koven, Lara Kueppers, Tomo'omi Kumagai, Yadvinder Malhi, Sean M. McMahon, Maurizio Mencuccini, Patrick Meir, Paul Moorcroft, Helene C. Muller-Landau, Oliver L. Phillips, Thomas Powell, Carlos A. Sierra, John Sperry, Jeff Warren, Chonggang Xu, Xiangtao XuKeywordsSourceNew PhytologistYear2018
- Changes in evapotranspiration (ET) from terrestrial ecosystems affect their water yield (WY), with considerable ecological and economic consequences. Increases in surface runoff observed over the past century have been attributed to increasing atmospheric CO2 concentrations resulting in reduced ET by terrestrial ecosystems. Here, we evaluate the water balance of a Pinus taeda (L.) forest with a broadleaf component that was exposed to atmospheric [CO2] enrichment (ECO2; +200 ppm) for over 17 years and fertilization for 6 years, monitored with hundreds of environmental and sap flux sensors...AuthorsEric J. Ward, Ram Oren, Hyun Seok Kim, Dohyoung Kim, Pantana Tor-ngern, Brent E. Ewers, Heather R. McCarthy, Andrew C. Oishi, Diane E. Pataki, Sari Palmroth, Nathan G. Phillips, Karina V.R. SchäferSourceGlobal Change BiologyYear2018
- Some interactions previously describe as mutualistic were revealed to be commensal or parasitic in subsequent investigations. Ant-mediated seed dispersal has been describe as a mutualism for more than a century; however, recent research suggests that it may be commensal or parasitic. Plants demonstrably benefit from ant-mediated seed dispersal, although there is little evidence available to demonstrate that the interaction benefits long-term ant fitness. Field experiments were conducted in temperate North America focused on a key seed-dispersing ant. All herbaceous plants were removed from...AuthorsRobert J. Warren, Katherine Elliott, Itamar Giladi, Joshua R. King, Mark A. BradfordKeywordsSourceEcological EntomologyYear2018
- Logging debris has the potential to benefit forest regeneration by increasing resource availability, modifying microclimate, and altering plant community structure. To understand potential mechanisms driving these benefits, we initiated research at a forested site on the Olympic Peninsula, WA that contained the invasive, nonnative competitor, Scotch broom (Cytisus scoparius). Immediately after harvesting the stand of mature coast Douglas-fir (Pseudotsuga menziesii var. menziesii) in late 2011, two levels of logging debris retention were created on replicated plots: 18.9 and 9.0 Mg ha−1,...AuthorsTimothy B. Harrington, Dave H. Peter, Robert A. SlesakSourceForest Ecology and Management. 417: 31-39.Year2018
- The northern spotted owl (Strix occidentalis caurina) is a federally-threatened subspecies in the United States associated with late-successional forests. In mesic forests it nests primarily in tree cavities, but also uses various types of external platform nests in drier forests. We describe 1717 northern spotted owl nests in 16 different tree species in five study areas in Washington and Oregon in the Pacific Northwest, USA. The vast majority of nests (87%) were in Douglas-fir (Pseudotsuga menziesii) trees, except on the Olympic Peninsula, Washington, where nests were about equally...AuthorsRandall Wilk, Damon B. Lesmeister, Eric D. ForsmanKeywordsSourcePLOS ONE. 13(5): e0197887-.Year2018
- Conifers are the dominant plant species throughout the high latitude boreal forests as well as some lower latitude temperate forests of North America, Europe, and Asia. As such, they play an integral economic and ecological role across much of the world. This study focused on the characterization of needle transcriptomes from four ecologically important and understudied North American white pines within the Pinussubgenus Strobus. The populations of many Strobusspecies are challenged by native and introduced pathogens, native insects, and abiotic factors. RNA from the needles of western...AuthorsEthan A. G. Baker, Jill L. Wegrzyn, Uzay U. Sezen, Taylor Falk, Patricia E. Maloney, Detlev R. Vogler, Annette Delfino-Mix, Camille Jensen, Jeffry Mitton, Jessica W. Wright, Brian Knaus, Hardeep Rai, Richard Cronn, Daniel Gonzalez-Ibeas, Hans A. Vasquez-Gross, Randi A. Famula, Jun-Jun Liu, Lara M. Kueppers, David B. NealeKeywordsSourceG3: Genes, Genomes, Genetics. 8(5): 1461-1474Year2018