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Displaying 12,581 - 12,590 of 64,684 Publications- Four new Nearctic species belonging to the Chrysotus longipalpus species group are described: Chrysotus keyensis sp. nov. (Florida), Chrysotus mccreadiei sp. nov. (Alabama), Chrysotus mystax sp. nov. (Alabama), and Chrysotus plumarista sp. nov. (Alabama). This brings the number of known species in this group to twelve. A key to species of males of the C. longipalpus species group and new distribution records are provided.AuthorsJustin B. Runyon, Renato S. CapellariKeywordsSourceZootaxa. 4399(4): 579-585.Year2018
- Genomic data are a powerful tool for elucidating the processes involved in the evolution and divergence of species. The speciation and phylogenetic relationships among Chinese Juglans remain unclear. Here, we used results from phylogenomic and population genetic analyses, transcriptomics, Genotyping-By-Sequencing (GBS), and whole chloroplast genomes (Cp genome) data to infer processes of lineage formation among the five native Chinese species of the walnut genus (Juglans, Juglandaceae), a widespread, economically important group. We found that the processes of isolation generated diversity...AuthorsPeng Zhao, Hui-Juan Zhou, Daniel Potter, Yi-Heng Hu, Xiao-Jia Feng, Meng Dang, Li Feng, Saman Zulfiqar, Wen-Zhe Liu, Gui-Fang Zhao, Keith WoesteSourceMolecular Phylogenetics and EvolutionYear2018
- To advance understanding of the distribution, climatic relationships, and status of American pikas (Ochotona princeps) in the Great Basin, United States, we compiled 2,387 records of extant pika sites surveyed since 2005, 89 records of documented extirpated sites (resurvey of historic sites), and 774 records of sites with old sign only. Extant sites extended across five degrees latitude and ten degrees longitude, encompassed six subregions, traversed forty mountain ranges, spanned 2,378 m in elevation (1,631–4,009 m), and comprised three of five currently described pika subspecies. A...AuthorsConnie I. Millar, Diane L. Delany, Kimberly A. Hersey, Mackenzie R. Jeffress, Andrew T. Smith, K. Jane Van Gunst, Bob WestfallKeywordsSourceArctic, Antarctic, and Alpine Research. 50(1): e1436296Year2018
- Wildland fire impacts on surface freshwater resources have not previously been measured, nor factored into regional water management strategies. But, large wildland fires are increasing and raise concerns about fire impacts on potable water. Here we synthesize longterm records of wildland fire, climate, and river flow for 168 locations across the United States. We show that annual river flow changed in 32 locations, where more than 19% of the basin area was burned. Wildland fires enhanced annual river flow in the western regions with a warm temperate or humid continental climate. Wildland...AuthorsDennis Hallema, Ge Sun, Peter V. Caldwell, Steve P. Norman, Erika C. Cohen, Yongqiang Liu, Kevin D. Bladon, Steve McNultySourceNature CommunicationsYear2018
- North American forests and forest management institutions are experiencing a wide range of significant ecological disturbances and socioeconomic changes, which point to the need for enhanced resilience. A critical capacity for resilience in institutions is strategic foresight. This article reports on a project of the North American Forest Commission to use Futures Research to enhance the resilience of forest management institutions in North America. The Aspirational Futures Method was used to develop four alternative scenarios for the future of North American forests and forestry agencies:...AuthorsDavid N. N. Bengston, Jonathan Peck, Robert Olson, Melissa Barros, Richard Birdsey, Daniel R. Williams, Juan Carlos Leyva Reyes, Francisco José ZamudioKeywordsSourceWorld Futures ReviewYear2018
- Caroline C. “Carrie” Dormon was a renowned forest conservationist and one of the most influential American naturalists of the early 20th century. In an era when women had no role in forestry, she led the effort to establish the Kisatchie National Forest, developed forestry education materials for schools, and promoted support for forestry among civic and community leaders. In addition to her passion for forestry, Carrie advocated education and support for indigenous peoples, wrote important books and articles on native plants, promoted highway and landscape beautification using native...AuthorsJames Barnett, Sarah M. TroncaleKeywordsSourceGeneral Technical Report SRS-231. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station.Year2018
- Understanding how factors that vary in spatial scale relate to population abundance is vital to forecasting species responses to environmental change. Stream and river ecosystems are inherently hierarchical, potentially resulting in organismal responses to fine‐scale changes in patch characteristics that are conditional on the watershed context. Here, we address how populations of two salamander species are affected by interactions among hierarchical processes operating at different scales within a rapidly changing landscape of the southern Appalachian Mountains. We modeled reach‐level...AuthorsKristen K. Cecala, John C. Maerz, Brian J. Halstead, John R. Frisch, Ted L. Gragson, Jeffrey Hepinstall-Cymerman, David S. Leigh, C. Rhett Jackson, James T. Peterson, Catherine M. PringleKeywordsSourceEcosphereYear2018
- This study compared 141 ecologically relevant climate metrics to field assessments of sugar maple (Acer saccharum Marsh.) canopy condition across Vermont, USA from 1988 to 2012. After removing the influence of disturbance events during this time period to isolate the impact of climate, we identified five climate metrics that were significantly related to sugar maple crown condition. While three of these are monthly summary metrics commonly used in climate analyses (minimum April, August and October temperatures), two are novel metrics designed to capture extreme climate events (periods of...AuthorsEvan M. Oswald, Jennifer Pontius, Shelly A. Rayback, Paul Schaberg, Sandra H. Wilmot, Lesley-Ann Dupigny-GirouxKeywordsSourceForest Ecology and ManagementYear2018
- In this issue, we cover new research on wide-ranging topics from the longterm effects of drought on competition between native and invasive plant species, to the effects of drought on pollinator visitation to invasive plants, to a novel use of insect pheromones to improve biocontrol of invasive saltcedar. There’s also big news to report in weed biocontrol: two new biocontrol agents were recently approved and can soon be used to combat the invasive plants yellow toadflax and whitetop.AuthorsJustin B. RunyonKeywordsSourceFort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 12 p.Year2018
- Study of all flies (Diptera) collected for one year from a four-hectare (150 x 266 meter) patch of cloud forest at 1,600 meters above sea level at Zurquí de Moravia, San José Province, Costa Rica (hereafter referred to as Zurquí), revealed an astounding 4,332 species. This amounts to more than half the number of named species of flies for all of Central America. Specimens were collected with two Malaise traps running continuously and with a wide array of supplementary collecting methods for three days of each month. All morphospecies from all 73 families recorded were fully curated by...AuthorsArt Borkent, Brian V. Brown, Peter H. Adler, Dalton de Souza Amorim, Kevin Barber, Daniel Bickel, Stephanie Boucher, Scott E. Brooks, John Burger, Zelia L. Burington, Renato S. Capellari, Daniel N. R. Costa, Jeffrey M. Cumming, Greg Curler, Carl W. Dick, John H. Epler, Eric Fisher, Stephen D. Gaimari, Jon Gelhaus, David A. Grimaldi, John Hash, Martin Hauser, Heikki Hippa, Sergio Ibanez-Bernal, Mathias Jaschhof, Elena P. Kameneva, Peter H. Kerr, Valery Korneyev, Cheslavo A. Korytkowski, Giar-Ann Kung, Gunnar Mikalsen Kvifte, Owen Lonsdale, Stephen A. Marshall, Wayne N. Mathis, Verner Michelsen, Stefan Naglis, Allen L. Norrbom, Steven Paiero, Thomas Pape, Alessandre Pereira-Colavite, Marc Pollet, Sabrina Rochefort, Alessandra Rung, Justin B. Runyon, Jade Savage, Vera C. Silva, Bradley J. Sinclair, Jeffrey H. Skevington, John O. Stireman, John Swann, F. Christian Thompson, Pekka Vilkamaa, Terry Wheeler, Terry Whitworth, Maria Wong, D. Monty Wood, Norman Woodley, Tiffany Yau, Thomas J. Zavortink, Manuel A. ZumbadoKeywordsSourceZootaxa. 4402(1): 53-90.Year2018