scholarly journals The International Institute of Tropical Forestry: Antecedents and present influences on forest entomology in Puerto Rico

1969 ◽  
pp. 25-31
Author(s):  
Kevin D. Carlin
Keyword(s):  
Puerto Rico ◽  
Forest Health ◽  
Forest Service ◽  
Health Programs ◽  
International Institute ◽  
Usda Forest Service ◽  
Tropical Forestry ◽  
Forest Entomology

An overview of the evolution of the International Institute of Tropical Forestry and activities that have influenced present day forest entomology research and USDA-Forest Service cooperative forest health programs in Puerto Rico.

Timber Use, Processing Capacity, and Capability within the USDA Forest Service, Rocky Mountain Region Timber-Processing Area

2020 ◽  
Vol 118 (3) ◽  
pp. 233-243
Author(s):  
Eric A Simmons ◽  
Todd A Morgan ◽  
Steven W Hayes ◽  
Kawa Ng ◽  
Erik C Berg
Keyword(s):  
Tree Mortality ◽  
Forest Health ◽  
Rocky Mountain ◽  
Timber Harvest ◽  
Forest Service ◽  
Mountain Region ◽  
Usda Forest Service ◽  
Rocky Mountain Region ◽  
Dead Trees ◽  
Facility Capacity

Abstract Over the past two decades, more than half a million acres of forested land has experienced extensive insect- and disease-caused tree mortality within the USDA Forest Service Rocky Mountain Region 2 (R2) of the National Forest System. To plan for timber harvest treatments needed to restore forest health, managers need information on forest product facility capacity and capability to profitably process timber of various size classes. To answer this need, the authors summarized timber harvest volumes by state and county group, identified facilities in the R2 area, quantified timber-processing capacities and size class capabilities, and analyzed the geographic variability of timber flows from county of harvest to mill. Results showed that nearly 285.5 million board feet Scribner of timber flowed from the study area to 101 processors throughout the R2 timber-processing area. Approximately 70 percent of annual milling capacity can profitably process trees ≧10 in. dbh, whereas just 8 percent can process timber <7 in. dbh. When planning forest-management activities, land managers should balance the need to remove small and/or dead trees with the local industry’s ability to profitably use that material.

scholarly journals Introduction to the Special Issue on Tropical Forests: Management and Ecology in the Anthropocene

Forests ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 48 ◽  
Author(s):  
Ariel Lugo ◽  
Grizelle González
Keyword(s):  
Tropical Forests ◽  
The United States ◽  
United States Department ◽  
International Institute ◽  
Special Issue ◽  
Land Restoration ◽  
75Th Anniversary ◽  
Degraded Land ◽  
Usda Forest Service ◽  
Tropical Forestry

This Special Issue of Forests is based on papers presented at the 75th anniversary of the United States Department of Agriculture (USDA) Forest Service International Institute of Tropical Forestry as well as other papers relevant to the topic of the Special Issue. The Institute is but one leg of a conservation relay among cultures and institutions that began in Puerto Rico a millennium ago. The Institute began operations in 1939 and celebrated its 75th anniversary on May, 2014. Over its 75 years of operation, the Institute has focused its research on tropical forests, with the scope of the research expanding over the years. An analysis of the lines of research of the Institute showed that over its history about 69 lines of research have been established and that of the original 17 lines of research between 1939 and 1949, all but one remained active in 2014. This history and continuity of the research program has allowed the Institute to observe ecological phenomena over decades, including the evolving forest structure and functioning on degraded land restoration experiments that began before the formal establishment of the Institute and are now over 80 years old.

scholarly journals Avoiding Spurious Conclusions from Forest Service Estimates of Timber Volume, Growth, Removal, and Mortality

2004 ◽  
Vol 21 (4) ◽  
pp. 194-199 ◽  
Author(s):  
William Luppold ◽  
William H. McWilliams
Keyword(s):  
Forest Inventory ◽  
Sampling Error ◽  
Volume Growth ◽  
Forest Health ◽  
Forest Service ◽  
Timber Species ◽  
Forest Change ◽  
Usda Forest Service ◽  
Specific Species ◽  
Sampling Procedures

Abstract Forest inventory statistics developed by the USDA Forest Service Forest Inventory and Analysis (FIA) units are useful in examining a variety of economic and biological issues, including forest-industry plant location, biological supplies of specific timber species, forest health, and long-term sustainability of timber resources. In general, these statistics accurately represent the resource, especially at the inventory-unit and state levels. However, several issues related to data collection must be understood to prevent spurious conclusions, especially when examining forest change characteristics such as removals, mortality, net growth, or the growth-removal ratio. Because FIA statistics are developed by sampling procedures, they are subject to sampling error. As the size of the forest area under study decreases, the number of observations used to develop FIA statistics decreases. The number of observations used to calculate FIA statistics can be particularly inadequate when examining net growth, removals, mortality, and growth-removal ratios of specific species for geographical areas smaller than inventory units. North. J. Appl. For. 21(4):194–199.

USDA Forest Service National Woodland Owner Survey, 2011-2013: design, implementation, and estimation methods

2016 ◽  
Author(s):  
Brett J. Butler ◽  
Brenton J. Dickinson ◽  
Jaketon H. Hewes ◽  
Sarah M. Butler ◽  
Kyle Andrejczyk ◽  
...  
Keyword(s):  
Forest Service ◽  
Estimation Methods ◽  
Usda Forest Service ◽  
National Woodland Owner Survey

USDA Forest Service Global Change Research Program Highlights: 1991-1995 : Effects of Global Change

1997 ◽  
Author(s):  
Richard Birdsey ◽  
Robert Mickler ◽  
David Sandberg ◽  
Richard Tinus ◽  
John Zerbe ◽  
...  
Keyword(s):  
Global Change ◽  
Research Program ◽  
Forest Service ◽  
Usda Forest Service ◽  
Global Change Research Program ◽  
Global Change Research

Conservation and restoration of sagebrush ecosystems and sage-grouse: An assessment of USDA Forest Service Science

2016 ◽  
Author(s):  
D. M. Finch ◽  
D. A. Boyce ◽  
J. C. Chambers ◽  
C. J. Colt ◽  
K. Dumroese ◽  
...  
Keyword(s):  
Forest Service ◽  
Service Science ◽  
Sage Grouse ◽  
Usda Forest Service

Stratified forest inventory estimation with mapped plots

2005 ◽  
Vol 35 (10) ◽  
pp. 2382-2386 ◽  
Author(s):  
Paul C Van Deusen
Keyword(s):  
Forest Inventory ◽  
Forest Service ◽  
Forest Types ◽  
Inventory Data ◽  
Expansion Factor ◽  
Usda Forest Service ◽  
Weighted Estimation ◽  
Forest Conditions

Weighted estimation formulas are developed for producing stratified estimates of means and variances where data come from plots that can contain multiple forest conditions. Each plot is mapped to allow the analyst to focus on specific forest types or conditions. The weights required to accommodate mapped plots are somewhat more complicated than the weights for unmapped plots. In particular, these weights depend on the mapped condition of interest. The implication is that a single plot weight or expansion factor will not suffice for all analyses as it does for unmapped plots. The methods are demonstrated using USDA Forest Service inventory data.

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