scholarly journals Area-Wide Analysis of Hardwood Defoliator Effects on Tree Conditions in the Allegheny Plateau

2004 ◽  
Vol 21 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Randall S. Morin ◽  
Andrew M. Liebhold ◽  
Kurt W. Gottschalk
Keyword(s):  
Tree Mortality ◽  
Forest Health ◽  
National Forest ◽  
Forest Land ◽  
Land Area ◽  
Usda Forest Service ◽  
Forest Inventory And Analysis ◽  
Allegheny Plateau ◽  
Using Data ◽  
Crown Dieback

Abstract The effects of defoliation caused by three foliage feeding insects, the gypsy moth (Lymantria dispar), the cherry scallopshell moth (Hydria prunivorata), and the elm spanworm (Ennomos subsignarius), on tree mortality and crown conditions were evaluated using data collected from 1984 to 1999 in the Allegheny National Forest located in northwestern Pennsylvania. While previous studies have focused on the effects of defoliation on trees in individual stands, this study differed in that it used exhaustive maps of defoliation and an areawide network of plots to assess these effects. A geographic information system was used to map the coincidence of USDA Forest Service Forest Inventory and Analysis and Forest Health Monitoring plot locations with defoliation polygons derived from aerial surveys to calculate cumulative years of defoliation for each pest. Over 85% of the Allegheny National Forest land area was defoliated at least once during the 16-year period from 1984 to 1999. Frequency of defoliation by specific defoliator species was closely associated with the dominance of their primary hosts in stands. Frequency of defoliation was often associated with crown dieback and mortality, but these relationships were not detectable in all species. These results suggest that when impacts are averaged over large areas (such as in this study) effects of defoliation are likely to be considerably less severe than when measured in selected stands (as is the approach taken in most previous impact studies).

Supporting National Forest System Planning with Forest Inventory and Analysis Data

2019 ◽  
Vol 118 (3) ◽  
pp. 289-306 ◽  
Author(s):  
Zachary Wurtzebach ◽  
R Justin DeRose ◽  
Renate R Bush ◽  
Sara A Goeking ◽  
Sean Healey ◽  
...  
Keyword(s):  
Forest Inventory ◽  
Ecological Integrity ◽  
Analysis Data ◽  
Forest Planning ◽  
National Forest ◽  
Forest Inventory And Analysis ◽  
Monitoring Strategies ◽  
Assessment And Monitoring ◽  
Using Data ◽  
Statistical Sample

Abstract In 2012, the US Forest Service promulgated new regulations for land-management planning that emphasize the importance of scientifically credible assessment and monitoring strategies for adaptive forest planning and the maintenance or restoration of ecological integrity. However, in an era of declining budgets, the implementation of robust assessment and monitoring strategies represents a significant challenge for fulfilling the intent of the new planning rule. In this article, we explore opportunities for using data and products produced by the USDA Forest Service’s Forest Inventory and Analysis (FIA) Program to support the implementation of the 2012 Planning Rule. FIA maintains a nationally consistent statistical sample of field plots that covers most national forests with hundreds of plots. We suggest that leveraging FIA data and products can generate efficiencies for assessment, planning, and monitoring requirements detailed in the 2012 Planning Rule, and help fulfill the adaptive intent of the new planning rule. However, strong national leadership and investment in regional-level analytical capacity, FIA liaisons, and decision-support tools are essential for systematically realizing the benefits of FIA data for forest planning across the National Forest System.

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.

Using Forest Inventory and Analysis Data to Support National Forest Management: Regional Case Studies

2020 ◽  
Vol 118 (3) ◽  
pp. 313-323 ◽  
Author(s):  
Coeli M Hoover ◽  
Renate Bush ◽  
Marin Palmer ◽  
Emrys Treasure
Keyword(s):  
Case Studies ◽  
Forest Inventory ◽  
Information Needs ◽  
Analysis Data ◽  
National Forest ◽  
Usda Forest Service ◽  
Forest Inventory And Analysis ◽  
Revision Process ◽  
Landscape Scales ◽  
The Many

Abstract Although many forestry practitioners have a general understanding of the Forest Inventory and Analysis (FIA) program and the type of data collected, most non-expert users of FIA reports and basic data are unlikely to be familiar with the breadth of information available and the many potential uses of the data. We present case studies from three USDA Forest Service regions to highlight a variety of applications of FIA data, from informing the forest plan revision process to supplying managers with timely information on important forest attributes at the stand and landscape scales. These examples illustrate the utility of FIA data in meeting managers’ information needs, the importance of the linkages between research and management throughout the agency, and the role that the FIA program can play in fostering those collaborations.

scholarly journals Production of Douglas-Fir in the Czech Republic based on national forest inventory data

2013 ◽  
Vol 59 (No. 10) ◽  
pp. 398-404 ◽  
Author(s):  
V. Podrázský ◽  
R. Čermák ◽  
D. Zahradník ◽  
J. Kouba
Keyword(s):  
Czech Republic ◽  
Tree Species ◽  
Forest Inventory ◽  
National Forest Inventory ◽  
Douglas Fir ◽  
National Forest ◽  
Northern Red Oak ◽  
Forest Land ◽  
Land Area ◽  
The Czech Republic

This article summarizes basic estimates of productivity and trend analysis of one of the principal introduced forest tree species in the Czech Republic, i.e. Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco). As a comparison, we also examine grand fir (Abies grandis [D. Don] Lindl), northern red oak (Quercus rubra L. syn. Quercus borealis Michx.) and black locust (Robinia pseudoacacia L). This paper presents estimates of forest land area, standing volume, annual and total increments, distribution of age classes, average ages and site indexes for the period 1979–2010. All data were obtained from the national forest inventory of the Czech Republic. Korf’s growth function was used for the assessment of current and mean annual increments (CAI, MAI) of Douglas-fir compared to other tree species. Our results suggest a decline in the annual area afforested by Douglas-fir, as influenced by the State administration management choices, a low rate of an increase in the forest land area, increasing average age of the forests. On the other hand, we observed a dramatic increase in the standing volume as well as high annual increments in volume. Douglas-fir is the most productive major tree species in the Czech Republic and there is a great potential to expand its use throughout the country.

scholarly journals Equations for Predicting Uncompacted Crown Ratio Based on Compacted Crown Ratio and Tree Attributes

2004 ◽  
Vol 19 (4) ◽  
pp. 260-267 ◽  
Author(s):  
David Azuma ◽  
Vicente J. Monleon ◽  
Donald Gedney
Keyword(s):  
Mean Squared Error ◽  
Monitoring Program ◽  
Estimation Method ◽  
Forest Health ◽  
Tree Height ◽  
Fire Risk ◽  
Logistic Function ◽  
Crown Fire ◽  
Usda Forest Service ◽  
Using Data

Abstract Equations to predict uncompacted crown ratio as a function of compacted crown ratio, tree diameter, and tree height are developed for the main tree species in Oregon, Washington, and California using data from the Forest Health Monitoring Program, USDA Forest Service. The uncompacted crown ratio was modeled with a logistic function and fitted using weighted, nonlinear regression. The models were evaluated using cross-validation. Mean squared error of predicted uncompacted crown ratio was between 0.1 and 0.15, overall bias was negligible, and correlation between the predicted and observed uncompacted crown ratio was high for most species. The sensitivity of crown fire risk to crown ratio estimation method was evaluated using the Fire and Fuels Extension of the Forest Vegetation Simulator. Torching index, an estimate of the wind speed needed for a crown fire to develop, was significantly greater when compacted crown ratio was used instead of uncompacted crown ratio. The close agreement in torching indices simulated using predicted and observed uncompacted crown ratio provides further evidence of the utility of the models developed in this study. West. J. Appl. For. 19(4):260–267.

Investigation of Hungarian forest health condition with special respect to climate change

2014 ◽  
Vol 3 (2) ◽  
pp. 164-176
Author(s):  
Zoltán Pödör ◽  
László Kolozs ◽  
György Solti ◽  
László Jereb
Keyword(s):  
Monitoring Program ◽  
Forest Health ◽  
Health Condition ◽  
Forest Monitoring ◽  
National Forest ◽  
Forest Protection ◽  
Significant Relationships ◽  
Time Period ◽  
Special Respect ◽  
Crown Dieback

The defoliation and crown dieback data of trees are typical indicators of forest health condition. In Hungary the data are collected in the frame of the national forest monitoring program and based on Forest Protection Network from 1987. In the paper these two data lines are investigated: (i) trend analysis was performed in respect of the examined time period according to different criteria, (ii) the relationships between healthy features and basic and derived climatic variables were examined by correlation analysis. The paper gives a general overview of the Hungarian forest health condition. Detectable general trends and statistically significant relationships are defined for all examined species and for 12 groups (subsets) of species. The received general results help us to determine further directions of deeper and more detailed investigations.

History of forestry and forest management

1975 ◽  
Vol 271 (911) ◽  
pp. 69-80 ◽  
Keyword(s):  
Forest Management ◽  
Industrial Revolution ◽  
Environmental Benefits ◽  
National Forest ◽  
Private Landowners ◽  
Timber Production ◽  
Land Area ◽  
The Past ◽  
The Social ◽  
History Of

Britain possesses a forest area which is one of the smallest in Europe in relation to its population and land area. In the past, forests have been felled to make way for farming and to supply timber for ships, houses, fuel and metal smelting. Timber was a key to sea power, and repeatedly the availability of home timber supplies has proved crucial in time of war. The nation’s dwindling reserves of timber have been a source of anxiety since Tudor times and periodic surges of planting for timber production by private landowners took place until about 1850. Thereafter, interest faded with the advent of the iron ship, the Industrial Revolution and the availability of cheap timber imports. Govern­ ment activity was minimal until a national forest authority was formed in 1919 to create a strategic timber reserve. Since 1958 there have been frequent policy reviews to assess the changing needs of the nation for timber and the new values associated with the social and environmental benefits of forests.

scholarly journals Early indications of drought impacts on forests in the southeastern United States

2015 ◽  
Vol 91 (04) ◽  
pp. 376-383 ◽  
Author(s):  
Michael K. Crosby ◽  
Zhaofei Fan ◽  
Martin A. Spetich ◽  
Theodor D. Leininger ◽  
Xingang Fan
Keyword(s):  
United States ◽  
Forest Type ◽  
Southeastern United States ◽  
Forest Health ◽  
Classification And Regression Tree ◽  
Future Research ◽  
Red Oak ◽  
White Oak ◽  
Cart Analysis ◽  
Crown Dieback

In the southeastern United States, drought can pose a significant threat to forests by reducing the amount of available water, thereby stressing trees. Destructive changes in crown conditions provide the first visible indication of a problem in a forested area, making it a useful indicator for problems within an ecosystem. Forest Health and Monitoring (FHM) and Palmer's Drought Severity Index (PDSI) data from 11 states in the southeastern United States were obtained in an effort to determine the role that drought, forest type, and ecoregion have in indicating differences in crown dieback. Analyses were conducted by species groups using classification and regression tree (CART) analysis. The greatest amount of total relative crown dieback occurred in red oak (18%), followed by other hardwoods (14%), and white oak (11%). Relative crown dieback varied by forest type and ecoregion with a relationship to drought in both red oak and white oak. This information will be useful for focusing future research and modeling efforts to predict forest health conditions affected by changing climate variables.

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