Treesearch

This resource update provides an overview of the forest resources in Ohio based on inventories conducted by the U.S. Forest Service, Forest Inventory and Analysis (FIA) program of the Northern Research Station. Estimates are based on field data collected using the FIA annualized sample design and are updated yearly. (See footnote on page 4.) Information about the national and regional FIA program is available online at http://fia.fs.fed.us. Since 2001, FIA has implemented an annual inventory in Ohio. For the 2014 inventory, estimates for current variables such as area, volume, and biomass...

Two-peak hydrographs after a single rain event are observed in watersheds and storms with distinct volumes contributing as fast and slow runoff. The authors developed a hydrograph model able to quantify these separate runoff volumes to help in estimation of runoff processes and residence times used by watershed managers. The model uses parallel application of two advection-diffusion equations and calibrates the model’s fast and slow time parameters as well as a coefficient representing the relative size of the smaller hydrograph peak. The model provides an accurate representation of...

The rising number of acres burned annually and growing number of people living in or adjacent to fire-prone areas in the United States make wildfire management an increasingly complex and challenging problem. Given the prominence of social issues in shaping the current challenges and determining paths forward, it will be important to have an accurate understanding of social dynamics. After providing a brief contextual background of fire management in the United States, this chapter focuses on a review of the key findings from social science research related to how the public views fire...

Urban forests are now recognized as essential components of sustainable cities, but there remains uncertainty concerning how to stratify and classify urban landscapes into units of ecological significance at spatial scales appropriate for management. Ecosystem classification is an approach that entails quantifying the social and ecological processes that shape ecosystem conditions into logical and relatively homogeneous management units, making the potential for ecosystem-based decision support available to urban planners. The purpose of this study is to develop and propose a framework for...

A protocol was established for callus induction and plant regeneration of Albizia julibrissin Durazz., a multipurpose tree. Calli were induced on hypocotyl explants excised from 10- to 14-d-old in vitro seedlings cultured on Murashige and Skoog (MS) medium supplemented with α-naphthaleneacetic acid (NAA) alone or in combination with 6-benzylaminopurine (BA) or 6-furfurylaminopurine (kinetin). The highest frequency of organogenic callus (82.2±3.6%) was obtained on MS medium with 10.8 µM NAA and 4.4 µM BA. Calli were then cultured on MS medium with BA or zeatin, singly or in combination, for...

This resource update provides an overview of the forest resources in Pennsylvania based on inventories conducted by the U.S. Forest Service, Forest Inventory and Analysis (FIA) program of the Northern Research Station. Estimates are based on field data collected using the FIA annualized sample design and are updated yearly (see footnote 1 on page 4). Information about the national and regional FIA program is available online at http://fia.fs.fed.us. Since 2000, FIA has implemented an annual inventory in Pennsylvania. For the 2014 inventory, estimates for current variables, such as area,...

We live in a world on fire. In just the past few years, major wildland fires have struck at least 13 U.S. states, as well as Indonesia, Australia, China, southern Europe, Russia, Canada, Bolivia, and other parts of the world. Wildland fires are increasing in number, size, and intensity. In particular, there has been an increase in large fire events—megafires—that account for more than 90 percent of the total area burned. These megafires can cause catastrophic damage in terms of human casualties, economic losses, and environmental destruction. We project that the trend toward larger and...

There is interest in restoring shortleaf pine (Pinus echinata) in pine–oak woodlands where it once was abundant. Because of its shade intolerance and slow initial growth rate, shortleaf pine restoration has remained a challenge because competition from hardwoods exhibits greater initial growth following canopy removal but greater shade tolerance with canopy retention. The study objective was to examine the survival and growth of underplanted shortleaf pine seedlings relative to competing hardwoods as a function of initial seedling size, overstory density, and understory competition. In the...

Visual data analysis often requires grouping of data objects based on their similarity. In many application domains researchers use algorithms and techniques like clustering and multidimensional scaling to extract groupings from data. While extracting these groups using a single similarity criteria is relatively straightforward, comparing alternative criteria poses additional challenges. In this paper we define visual reconciliation as the problem of reconciling multiple alternative similarity spaces through visualization and interaction. We derive this problem from our work on model...

This publication provides an overview of forest resources in West Virginia based on inventories conducted by the U.S. Forest Service, Forest Inventory and Analysis (FIA) program of the Northern Research Station. For annual inventory years 2002-2013, the sample length was equal to 5 years. Beginning in 2014, the cycle length was changed to 7 years. For the 2014 inventory, estimates for current variables such as area, volume, and biomass are based on 2,369 plot samples collected from 2009-2014. Change variables, such as net growth, removals, and mortality, are based on 2,035 samples collected...