Treesearch

To investigate the role of extractives on heat-induced discoloration of wood, samples of black locust (Robinia pseudoacacia) wood flour were extracted with various solvents prior to heat-treatment. Analysis of their color parameters and chromophoric structures showed that the chroma value of the unextracted sample decreased while that of the extracted sample increased after heat-treatment. Both samples showed broad diffuse reflectance UV-Vis (DRUV) absorption bands with maxima around 360-380 nm after heat-treatment due to the formation of conjugated double bonds, carbonyl functionalities,...

The International Nondestructive Testing and Evaluation of Wood Symposium Series was initiated by Washington State University and the USDA Forest Products Laboratory (FPL) in 1963 with the convening of a symposium on the topic of nondestructive testing of wood at FPL. Including that meeting, 17 symposia have been held during the last 50 years at various sites around the world that focus on nondestructive testing and evaluation of wood. The technical content of these symposia have been captured and published in hardcopy proceedings. The proceedings from this series of symposia are rather...

Coyotes (Canis latrans) are novel predators throughout the southeastern United States and their depredation of white-tailed deer (Odocoileus virginianus) neonates may explain observed declines in some deer populations in the region, but direct evidence for such a relationship is lacking. Our objective was to quantify neonate survival rates and causes of mortality at the United States Department of Energy’s Savannah River Site (SRS), South Carolina to directly evaluate degree of predation in this deer population. From 2006 to 2009, we radio-monitored 91 neonates captured with the aid of...

Fleshy fruit is a key food resource for many vertebrates and may be particularly important energy source to birds during fall migration and winter. Hence, land managers should know how fruit availability varies among forest types, seasons, and years. We quantified fleshy fruit abundance monthly for 9 years (1995–2003) in 56 0.1-ha plots in 5 forest types of South Carolina’s upper Coastal Plain, USA. Forest types were mature upland hardwood and bottomland hardwood forest, mature closed-canopy loblolly (Pinus taeda) and longleaf pine (P. palustris) plantation, and recent clearcut regeneration...

Understanding the dynamics of sediment generation and transport on hillslopes provides important constraints on the rate of sediment output from orogenic systems. Hillslope sediment fluxes are recorded by organic material found in the deposits infilling unchanneled convergent topographic features called hollows. This study describes the first hollow infilling rates measured in the southern Appalachian Mountains. Infilling rates (and bedrock erosion rates) were calculated from the vertical distribution of radiocarbon ages at two sites in the Coweeta drainage basin, western North Carolina....

Red-headed woodpecker (Melanerpes erythrocephalus) populations have declined in the United States and Canada over the past 40 years. However, few demographic studies have been published on the species and none have addressed adult survival. During 2006¨C2007, we estimated survival probabilities of 80 radio-tagged red-headed woodpeckers during the breeding season in mature loblolly pine (Pinus taeda) forests in South Carolina. We used known-fate models in Program MARK to estimate survival within and between years and to evaluate the effects of foliar cover (number of available cover...

Fire and fuels management have become increasingly challenging in the last three decades due to climate change, invasive species, urbanization and development, increased land use, and the effects of these factors on fire size and frequency (Westerling et al. 2007; D’Antonio and Vitousek 1992). Often, the science and information needed to carry out best management practices are lacking or difficult to find (Simpson 2009; Wright 2004). Fires do not stop burning at jurisdictional boundaries, and land managers must work with the complexities of differing agency missions, policies, resource...

Este informe incluye una descripción del Bosque Nacional El Yunque, que también se denomina Bosque Experimental de Luquillo, ubicado al noreste de Puerto Rico. Entre los temas principales, se incluye el entorno ambiental (geología, suelos y clima), las gradientes ambientales, la flora arborescente, la fauna vertebrada y la gestión forestal (es decir, plantaciones, actividades de silvicultura, planificación, investigación y usos de tierras designadas). En una cronología desde el momento del descubrimiento europeo hasta el presente, se destacan los principales eventos en el Bosque Experimenta...

In 2009, the federal Joint Fire Science Program (JFSP) initiated a national network of boundary organizations, known as regional fire science consortia, to accelerate the awareness, understanding, and use of wildland fire science. Needs assessments conducted by consortia in eight regions of the United States are synthesized here using a case survey approach. Although regions used different methods based on their different ecosystems, geography, and demography, results showed striking similarities in how fire science is accessed and used, barriers to its use, and research information...