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27 results found
Ridges within the lower montane rain forests (sensu Beard) of the Caribbean Basin are dominated by Dacryodes excelsa, a tree species known as tabonuco in Puerto Rico and gommier in the Lesser Antilles. Periodially, hurricanes traverse the islands causing changes in structure, species composition,…
Author(s): P.L. Weaver
Keywords: lower montane rain forest, hurricanes, forest monitoring, structure, forest dynamics, Puerto Rico
Source: Bois et Forets des Tropiques. 317:7-21.
Year: 2013
This report presents the full simulation results of the work described in Roesch (2014), in which multiple levels of simulation were used to test the robustness of estimators for the components of forest change. In that study, a variety of spatial-temporal populations were created based on, but…
Author(s): Francis A. Roesch
Keywords: Annual inventories, components of change, forest monitoring, sampling error, spatial-temporal sample design
Source: e-Gen. Tech. Rep. SRS-GTR-194. Asheville, NC: USDA-Forest Service, Southern Research Station. 79 p.
Year: 2014
We present a collection of papers derived from the 2012 Forest Inventory and Analysis (FIA) Symposium held on December 4-6, 2012 in Baltimore, MD, USA. The symposium featured 128 oral presentations with nearly 200 attendees from the United States and other countries. A proceedings from the…
Author(s): Greg C. Liknes, Randall S. Morin, Charles D. Canham
Keywords: forest inventory, forest monitoring, trends, projections, time series, FIA
Source: Mathematical and Computational Forestry and Natural-Resources Sciences. 5(2): 112-114.
Year: 2013
The Northwest Forest Plan (NWFP), which aims to conserve late-successional and old-growth forests (older forests) and associated species, established new policies on federal lands in the Pacific Northwest USA. As part of monitoring for the NWFP, we tested nearest-neighbor imputation for mapping…
Author(s): Janet L. Ohmann, Matthew J. Gregory, Heather M. Roberts, Warren B. Cohen, Robert E. Kennedy, Zhiqiang Yang
Keywords: gradient nearest neighbor, gradient analysis, old growth, Northwest Forest Plan, landsat change detection, forest monitoring
Source: Forest Ecology and Management. 272: 13-25
Year: 2012
Lidar height data collected by the Geosciences Laser Altimeter System (GLAS) from 2002 to 2008 has the potential to form the basis of a globally consistent sample-based inventory of forest biomass. GLAS lidar return data were collected globally in spatially discrete full waveform "shots," which…
Author(s): Sean P. Healey, Paul L. Patterson, Sassan S. Saatchi, Michael A. Lefsky, Andrew J. Lister, Elizabeth A. Freeman
Keywords: biomass, forest monitoring, remote sensing, lidar
Source: Carbon Balance and Management. 7: 10.
Year: 2012
Density management is implemented at a local (stand) scale, but is based on conservation goals that address a broader landscape. Although regional conservation eff orts such as the Northwest Forest Plan (NWFP) focus primarily on public lands, all land ownerships and allocations contribute unique…
Author(s): Janet L. Ohmann
Keywords: Old growth, late-successional forest, early-successional forest, forest monitoring, change detection, Pacifi c Northwest, Northwest Forest Plan, conservation planning
Source: In: Anderson, P.D.; Ronnenberg, K.L., eds. Density management in the 21st century: west side story. Gen. Tech. Rep. PNW-GTR-880. Portland, OR: US Department of Agriculture, Forest Service, Pacific Northwest Research Station: 41-42.
Year: 2013
Paired aerial photographs were interpreted to assess recent changes in tree, impervious and other cover types in 20 U.S. cities as well as urban land within the conterminous United States. National results indicate that tree cover in urban areas of the United States is on the decline at a rate of…
Author(s): David J. Nowak, Eric J. Greenfield
Keywords: city trees, ecosystem services, forest monitoring, urban forestry, urban greening, urban trees
Source: Urban Forestry & Urban Greening. 11(1): 21-30.
Year: 2012
Broad-scale monitoring in Alaska has become of increasing interest due to uncertainty about the potential impacts of changing climate on high-latitude ecosystems. The Forest Inventory and Analysis (FIA) program is a national monitoring program for all public and private forestlands in the US, but…
Author(s): Tara M. Barrett, Andrew N. Gray
Keywords: boreal forests, forest monitoring, regional monitoring, national forest inventory
Source: Biological Conservation. 144: 1285-1294
Year: 2011
The Forest Inventory and Analysis (FIA) Program of the Forest Service, Department of Agriculture, is an annual monitoring system for the entire United States. Each year, an independent "panel" of FIA field plots is measured. To improve accuracy, FIA uses the "Moving Average" or "Temporally…
Author(s): Raymond Czaplewski, Michael Thompson
Keywords: forest monitoring, Kalman filter, composite estimator, Pinus contorta, Dendroctonus ponderosae, population dynamics model, AIC, information-theoretics
Source: In: McWilliams, Will; Moisen, Gretchen; Czaplewski, Ray, comps. Forest Inventory and Analysis (FIA) Symposium 2008; October 21-23, 2008; Park City, UT. Proc. RMRS-P-56CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 55 p.
Year: 2009
Understanding the impacts of Phytophthora ramorum on forests will require knowledge of pre-disease distribution, abundance, and rates of change for affected species. This study estimated pre-epidemic mortality rates for nine common host tree species: bigleaf maple (Acer macrophyllum), California…
Author(s): T.M. Barrett
Keywords: forest change, forest health, forest monitoring, oak decline, sudden oak death
Source: In: Frankel, Susan J.; Shea, Patrick J.; and Haverty, Michael I., tech. coords. Proceedings of the sudden oak death second science symposium: the state of our knowledge. Gen. Tech. Rep. PSW-GTR-196. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 371-378
Year: 2006