Treesearch
Displaying 15,531 - 15,540 of 65,188 Publications- Postfledging survival of neotropical migrant songbirds has been linked to seasonal and annual changes in the environment and to individual condition. Understanding what influences variation in postfledging movements may provide insight into the differential value of habitat across life-history stages. We conducted a radio-telemetry study of postfledging ovenbirds (Seiurus aurocapilla; n=45) and Acadian flycatchers (Empidonax virescens; n=62) in mature-forest fragments from 2012 to 2015 in Missouri, USA. We documented variability in behavior and space use and used generalized linear mixed...AuthorsJulianna M. A. Jenkins, Frank R. Thompson, John FaaborgKeywordsSourceThe Journal of Wildlife ManagementYear2016
- The Golden-cheeked Warbler (Setophaga chrysoparia) is an endangered songbird that breeds in mature juniper-oak woodlands restricted to Central Texas. This habitat is increasingly susceptible to crown fire due to climate change, land use change, and fire suppression. Prescribed fire is a potential tool to reduce the risk of crown fire and may be a management tool to enhance juniper-oak woodlands for breeding warblers. However, no experimental study has been undertaken to investigate how well prescribed fire can meet these goals. We conducted a before-after control-impact study on three...AuthorsJennifer L. Reidy, Frank R. Thompson, Carl Schwope, Scott Rowin, James M. MuellerKeywordsSourceForest Ecology and ManagementYear2016
- Governance is key to sustainable urban transitions. Governance is a system of social, power, and decision-making processes that acts as a key driver of resource allocation and use, yet ecologists even urban ecologists–seldom consider governance concepts in their work. Transitions to more sustainable futures are becoming increasingly important to the management of many ecosystems and landscapes, and particularly so for urban systems. We briefly identify and synthesize important governance dimensions of urban sustainability transitions, using illustrations from cities in which long- term...AuthorsTischa A. A. Munoz, Lindsay K. Campbell, D.L. Childers, Morgan Grove, D.M. Iwaniec, S.T.A. Pickett, Michelle Romolini, Erika S. SvendsenKeywordsSourceEcosphere, 7 (11), 1-11.Year2016
- Fire is one of the main factors directly impacting Amazonian forest biomass and dynamics. Because of Amazonia’s large geographical extent, remote sensing techniques are required for comprehensively assessing forest fire impacts at the landscape level. In this context, Light Detection and Ranging (LiDAR) stands out as a technology capable of retrieving direct measurements of vegetation vertical arrangement, which can be directly associated with aboveground biomass. This work aims, for the first time, to quantify post-fire changes in forest canopy height and biomass using airborne LiDAR in...AuthorsLuciane Sato, Vitor Gomes, Yosio Shimabukuro, Michael Keller, Egidio Arai, Maiza dos-Santos, Irving Brown, Luiz AragãoKeywordsSourceRemote Sensing. 8(10): 839-.Year2016
- The Alaska Arctic Vegetation Archive (AVA-AK, GIVD-ID: NA-US-014) is a free, publically available database archive of vegetation-plot data from the Arctic tundra region of northern Alaska. The archive currently contains 24 datasets with 3,026 non-overlapping plots. Of these, 74% have geolocation data with 25-m or better precision. Species cover data and header data are stored in a Turboveg database. A standardized Pan Arctic Species List provides a consistent nomenclature for vascular plants, bryophytes, and lichens in the archive. A web-based online Alaska Arctic Geoecological Atlas...AuthorsDonald A. Walker, Amy L. Breen, Lisa A. Druckenmiller, Lisa W. Wirth, Will Fisher, Martha K. Raynolds, Jozef Šibík, Marilyn D. Walker, Stephan Hennekens, Keith Boggs, Tina Boucher, Marcel Buchhorn, Helga Bültmann, David J. Cooper, Fred J.A Daniëls, Scott J. Davidson, James J. Ebersole, Sara C. Elmendorf, Howard E. Epstein, William A. Gould, Robert D. Hollister, Colleen M. Iversen, M. Torre Jorgenson, Anja Kade, Michael T. Lee, William H. MacKenzie, Robert K. Peet, Jana L. Peirce, Udo Schickhoff, Victoria L. Sloan, Stephen S. Talbot, Craig E. Tweedie, Sandra Villarreal, Patrick J. Webber, Donatella ZonaKeywordsSourcePhytocoenologia. 46(2): 221-229.Year2016
- Between-year breeding dispersal has not been previously documented in White-headed Woodpeckers (Picoides albolarvatus). Therefore, resightings of color-banded adults on previous years’ breeding territories have been considered a means of estimating annual adult survival. From 2013 to 2015, I observed 2 cases of between-year breeding dispersal by adult color-banded White-headed Woodpeckers in central Washington. Mean dispersal distance was 6.9 km, and both adults were successful in fledging young in their new territories. Without extensive searches outside of previous years’ territories,...AuthorsTeresa LorenzKeywordsSourceNorthwestern . 97(3): 252-256.Year2016
- Most members of the laurel family (Lauraceae) indigenous to the United States appear to be highly susceptible to laurel wilt, a disease caused by Raffaelea lauricola T.C. Harr., Aghayeva & Fraedrich, a fungal symbiont of the redbay ambrosia beetle (Xyleborus glabratus Eichhoff) (Fraedrich et al. 2008; Harrington et al. 2008). The beetle and fungus were introduced into the United States from Asia around 2002, and the disease has caused widespread mortality of redbay (Persea borbonia) throughout the southeastern United States.AuthorsStephen Fraedrich, T. C. Harrington, B. A. McDaniel, Susan BestSourcePlant DiseaseYear2016
- We present a decade and a half (1998–2013) of carbon dioxide fluxes from an old-growth stand in the American Pacific Northwest to identify ecosystem-level responses to Pacific teleconnection patterns, including the El Niño/Southern Oscillation (ENSO). This study provides the longest, continuous record of old-growth eddy flux data to date from one of the longest running Fluxnet stations in the world. From 1998 to 2013, average annual net ecosystem exchange (FNEE) at Wind River AmeriFlux was −32 ± 84 g Cm−2yr−1 indicating that the late seral forest is on average a small net sink of atmospheri...AuthorsSonia Wharton, Matthias FalkKeywordsSourceEnvironmental Research Letters. 11(4): 044016-.Year2016
- Deforestation rates have declined in the Brazilian Amazon since 2005, yet degradation from logging, fire, and fragmentation has continued in frontier forests. In this study we quantified the aboveground carbon density (ACD) in intact and degraded forests using the largest data set of integrated forest inventory plots (n = 359) and airborne lidar data (18,000 ha) assembled to date for the Brazilian Amazon. We developed statistical models relating inventory ACD estimates to lidar metrics that explained 70% of the variance across forest types. Airborne lidar-ACD estimates for intact forests...AuthorsMarcos Longo, Michael Keller, Maiza N. dos-Santos, Veronika Leitold, Ekena R. Pinagé, Alessandro Baccini, Sassan Saatchi, Euler M. Nogueira, Mateus Batistella, Douglas C. MortonKeywordsSourceGlobal Biogeochemical Cycles. 30(11): 1639-1660.Year2016
- This report presents the results of the fifth global scientific assessment undertaken by the GFEP initiative. The report set out to gain deeper understanding of the meaning of illegal logging and related timber trade, its scale, drivers and consequences. It provides a structured synthesis of available scientific and expert knowledge on illegal logging and associated timber trade while adding to existing studies and reports by sharing new insights, including a criminology perspective and new information about timber and timber product trade flows as well as exploring future policy options...AuthorsB. Cashore, K. McGinley, S. Leipold, P.O. Cerutti, G. Bueno, S. et al. CarodenutoKeywordsSourceIllegal Logging and Related Timber Trade - dimensions, drivers, impacts and responses. A global scientific rapid response assesment report. . D. Kleinschmit, S. Mansourian, C. Wildburger and A. Purret (eds.), International Union of Forest Research Organizations (IUFRO), Vienna pp. 119-131.Year2016