Treesearch
Displaying 3,311 - 3,320 of 64,772 Publications- Landscape context is integral to population ecology, affecting a range of life history parameters, yet very little is known about how landscape structure influences many taxa. We sampled wetlands at 531 sites across 16 states in the eastern U.S. to examine the influence of landscape heterogeneity and anthropogenic land use on the relative abundance of freshwater turtles, one of the most endangered vertebrate clades in the world. Specifically, we aimed to understand how two components of landscape structure — compositional heterogeneity (wetland diversity) and configurational heterogeneity...AuthorsH. Patrick Roberts, Lisabeth L. Willey, Michael T. Jones, David King, Thomas S.B. Akre, John Kleopfer, Donald J. Brown, Scott W. Buchanan, Houston C. Chandler, Phillip deMaynadier, Melissa Winters, Lori Erb, Katharine D. Gipe, Glenn Johnson, Kathryn Lauer, Eric B. Liebgold, Jonathan D. Mays, Jessica R. Meck, Joshua Megyesy, Joel L. Mota, Nathan H. Nazdrowicz, Kevin J. Oxenrider, Molly Parren, Tami S. Ransom, Lindsay Rohrbaugh, Scott Smith, Derek Yorks, Brian ZarateKeywordsSourceBiological ConservationYear2023
- Ranavirosis is a disease of high concern for amphibians due to widespread documentation of its lethal and sublethal impacts and its high transmission potential across populations and species. We investigated whether spotted salamander (Ambystoma maculatum) ranavirus prevalence and viral load were associated with habitat characteristics, genetic diversity, corticosterone levels, and body size. In 2015 and 2016, we sampled 34 recently created vernal pools in the Monongahela National Forest, West Virginia, USA. We collected tail clippings from 1,128 spotted salamander larvae and waterborne...AuthorsAlice R. Millikin, Drew R. Davis, Donald J. Brown, Sarah K. Woodley, Stephanie Coster, Amy Welsh, Jacob L. Kerby, James T. AndersonKeywordsSourceJournal of Wildlife DiseasesYear2023
- Nematodes play significant roles in carbon and nitrogen biogeochemical cycles in soils. The contributions of individual species to these processes depend, in part, on differences in their population ecology. Formatting errors were discovered that made portions of our previously published work on this subject nearly unintelligible. Herein, we correct those errors.AuthorsH. Ferris, Robert C. Venette, S. Sánchez MorenoSourceSoil Biology and BiochemistryYear2023
- This work evaluates wheat straw, switchgrass, and hemp hurd as potential alternatives for producing dissolving pulp using sulfur dioxide (SO2)-ethanol-water (SEW) pulping. The SEW process is described in detail for wheat straw, and the best pulping conditions for this feedstock were 130 °C, 4 h, and 10% SO2 concentration, comprised in a sulfur-ethanol-water ratio of 10-45-45. This resulted in a viscose-grade pulp with 93% α-cellulose, 2.0% hemicelluloses, <0.1% lignin, 0.2% ash content, and a viscosity of 4.7 cP. The best pulping conditions for wheat straw were applied to switchgrass and...AuthorsRamon E. Vera, Keren A. Vivas, Fernando Urdaneta, Jorge Franco, Runkun Sun, Naycari Forfora, Ryen Frazier, Stephanie Gongora, Daniel Saloni, Larissa Fenn, Junyong Zhu, Hou-min Chang, Hasan Jameel, Ronalds GonzalezKeywordsSourceJournal of Cleaner ProductionYear2023
- Holarctic martens (genus Martes) are small carnivores that are considered functionally solitary, with both resource scarcity and martens' inability to store energetic reserves posited as precluding social behavior. Interactions between martens are expected to be largely agonistic with the exception of mating and rearing of kits by adult females. Nonetheless, we documented multiple instances of conspecific tolerance by Pacific martens (M. caurina) during long-term monitoring of radio-marked animals in 2 study populations. Observations from radio-tracking and remotely triggered camera trap...AuthorsMatthew S. Delheimer, Marie E. Martin, Katie MoriartySourceWestern North American Naturalist. 83(2): 277-282.Year2023
- Environmental mercury (Hg) contamination of the global tropics outpaces our understanding of its consequences for biodiversity. Knowledge gaps of pollution exposure could obscure conservation threats in the Neotropics: a region that supports over half of the world’s species, but faces ongoing land-use change and Hg emission via artisanal and small-scale gold mining (ASGM). Due to their global distribution and sensitivity to pollution, birds provide a valuable opportunity as bioindicators to assess how accelerating Hg emissions impact an ecosystem’s ability to support biodiversity, and...AuthorsChristopher J. Sayers, David C. Evers, Viviana Ruiz-Gutierrez, Evan Adams, Claudia M. Vega, Jessica N. Pisconte, Vania Tejeda, Kevin Regan, Oksana P. Lane, Abidas A. Ash, Reynold Cal, Stevan Reneau, Wilber Martínez, Gilroy Welch, Kayla Hartwell, Mario Teul, David Tzul, Wayne J. Arendt, Marvin A. Tórrez, Mrinalini Watsa, Gideon Erkenswick, Caroline E. Moore, Jacqueline Gerson, Victor Sánchez, Raúl Pérez Purizaca, Helen Yurek, Mark E. H. Burton, Peggy L. Shrum, Sebastian Tabares-Segovia, Korik Vargas, Finola F. Fogarty, Mathieu R. Charette, Ari E. Martínez, Emily Bernhardt, Robert J. Taylor, Timothy H. Tear, Luis E. FernandezSourceEcotoxicologyYear2023
- Contemporary forest management often requires meeting diverse ecological objectives including maintaining ecosystem function and promoting biodiversity through timber harvesting. Wildlife are essential in this process by providing ecological services that can facilitate forest resiliency in response to timber harvesting. However, the mechanisms driving species’ responses remain ambiguous. The goal of this study was to assess mechanisms influencing eastern red-backed salamander (RBS; Plethodon cinereus) response to overstory cover removal. We evaluated two mitigation strategies for the RBS...AuthorsEric Margenau, Petra B. Wood, Donald J. Brown, Christopher W. RyanKeywordsSourceEnvironmental ManagementYear2023
- Weak signals, the first signs of a potentially emerging issue that could disrupt current trends and megatrends, are hidden among disconnected pieces of information. Analyzing weak signals can help decision makers generate preparedness and a rapid-response capacity for possible systemic changes in the forest bioeconomy, where weak signals have not been studied extensively. This exploratory study sought to understand how to identify and interpret weak signals of change that may have an impact on the forest bioeconomy. An international panel of experts in the forest bioeconomy and in foresight...AuthorsTuomas Mauno, Fellice Catelo, David N. N. Bengston, Jouni Pykäläinen, Teppo HujalaKeywordsSourceForest Policy and EconomicsYear2023
- During an extreme heat wave event (‘Heat Dome’) in Pacific Northwest (PNW, USA) and British Columbia during late June of 2021, all-time record high air temperatures (Tair) exceeding 40-45 °C were observed. Within days of the event, widespread foliar damage was observed in many locations of this region, along with some reports of tree mortality. Indeed, there is an increasing recognition that heat waves can lead to widespread growth reductions and forest vulnerabilities. As the frequency of coincident heat waves and drought has increased and is expected to continue to increase, understanding...AuthorsC Still, A Sibley, D DePinte, P Busby, Connie Harrington, M Schulze, D Shaw, David R. Woodruff, D Rupp, C Daly, W Hammond, G PageKeywordsSourceTree Physiology. 43(2): 203-209.Year2023
- An increasingly important goal of federal land managers in seasonally dry forests of the western US is restoring forest resilience. In this study, we quantified the degree to which a thinning treatment in a dry forest of eastern Oregon restored aspects of forest resilience by focusing on key functional attributes of our study system. First, we measured several physiological responses of overstory trees that are associated with resilience, including radial growth, resin production, abundance of non-structural carbohydrates (NSC), and leaf area. Second, we investigated understory vegetation...AuthorsMichael J. Vernon, James D. Johnston, Thomas D. Stokely, Becky A. Miller, David R. WoodruffKeywordsSourceForest Ecology and Management. 546(3): 121371.Year2023