Treesearch

At present, cross-laminated timber (CLT) used in the United States is made with softwood species. With the expanding market for mass timber products, there is growing interest in understanding the technological, economic, social and environmental viability of CLT manufactured from hardwood lumber. Many states across the Southeastern United States produce hardwood lumber but demand for hardwood items has decreased, leading to hardwood production which is now near to record-low levels. Lower hardwood production impacts forest management and rural communities, thereby creating a need for new...

After reviewing two asymmetric discrete Laplace models, some asymmetric discrete Laplace processes are introduced and investigated. The problem of developing bivariate discrete Laplace processes is also addressed.

DNA analysis of environmental samples (eDNA) provides a non-intrusive approach to identify organisms, characterize biological communities, and assess biodiversity, including the detection and monitoring of invasive plant effects. However, the use of eDNA for specific applications, such as targeted-species detection, geographic and floral source tracing, and assessment of invasive plant ecological and environmental effects, requires the development of species-specific genetic primers. Chinese tallow (Triadica sebifera (L.) Small) is a non-native high-impact invader, capable of changing fire...

Carbon nanotubes (CNTs) and their allotropes have been regarded as promising materials for electric double-layer supercapacitors (EDLCs). It is well accepted that the higher surface area of carbon will enable a higher capacity of energy storage. An interesting question is what could happen if the half channel size is less than the Stern layer spacing. In this study, we grew CNTs into carbonized basswood for EDLCs, in which the CNT density varied in bass carbon sheets with different thicknesses, eventually giving various pore/channel sizes. Electrochemical analyses revealed that the bass...

The ability to collect precise three-dimensional (3D) forest structural information at a fraction of the cost of airborne light detection and ranging (lidar) makes uncrewed aerial systems-lidar (UAS-lidar) a remote sensing tool with high potential for estimating forest structural attributes for enhanced forest management. The estimation of forest structural data in area-based forest inventories relies on the relationship between field-based estimates of forest structural attributes (FSA) and lidar-derived metrics at plot level, which can be modeled using either parametric or non-parametric...

A 2020 analysis of the urban forest in Baltimore, Maryland reveals that this area has an estimated 1.9 million live trees across all ownerships. The most common tree species by number are tree of heaven, northern white-cedar, American elm, green ash, and Norway maple. The majority of trees are found on forest land (39.2 percent; 731,696 trees). Trees in Baltimore are estimated to store about 440,635 tons of carbon (1.6 million tons of carbon dioxide) valued at $75.2 million. In addition, it is estimated that these trees remove about 15,200 tons of carbon per year (or 56,000 tons carbon...

Background: The active use of wildfire to meet forest management objectives is an important tool to increase the scale of forest restoration in dry, historically frequent-fire forests. While there are many benefits of reintroducing fire to these forests, the impact of wildland fire use policies in frequent-fire forests on aboveground carbon stocks has not yet been studied. In this study, we begin to fill this knowledge gap by assessing how fire frequency and severity affected aboveground carbon dynamics in two basins in the Sierra Nevada with a history of wildfire use over the past 20 to...

Blanketflower (Gaillardia aristata Pursh) belongs to the Gaillardiinae subtribe and Helenieae tribe of the Asteraceae family (Strother 2006). This species was first collected on July 7, 1806, during the Lewis and Clark expedition. It was growing on a dry low-elevation hillside in the Rocky Mountains of Lewis and Clark County, Montana, where it was still common in vegetation surveys conducted in the late 1990s (Reveal et al. 1999).

The intensity of catastrophic weather events, such as hurricanes, are projected to increase across the Southeastern United States (US). With nearly half of the region's land covered by productive forests, periodic large-scale storms frequently disrupt timber supply and destabilize local markets. We investigate the impact of Hurricane Michael (2018) on timber markets in the Southeastern Coastal US, employing a Regression Discontinuity in Time (RDiT) design. Using bi-monthly stumpage price data from hurricane-affected and surrounding micro-markets, we estimate causal effects on market...

In Michigan, Wisconsin, and Minnesota, 76 percent of the more than 800,000 hectares of red pine (Pinus resinosa) forests are plantations. Plantations of commercial timber species have increased over the last several decades due to the global demand for wood. In the western Great Lakes region, many of these plantations are on sites where red pine occurred naturally and were sometimes established on abandoned farmland that was unproductive for agriculture.