Treesearch

Evaporation of precipitation from plant surfaces, or interception, is a major component of the global water budget. Interception has been measured and/or modelled across a wide variety of forest types; however, most studies have focused on mature, second-growth forests and few studies have examined interception processes across forest age classes. We present data on two components of interception, total canopy interception (Ei) and litter interception—i.e. Oi + Oe horizon layers—(Eff), across a forest age chronosequence, from 2 years since harvest to old-growth. We used precipitation,...

This article is a Commentary on Both et al., 221: 1853–1865.

Recent, widespread spruce beetle (Dendroctonus rufipennis) outbreaks have driven extensive tree mortality across western North America. Post-disturbance forest management often includes salvage logging to capture economic value of dead timber, reduce fire hazard, and meet other social or ecological objectives. Little is known about effects of salvage logging on surface fuel loads or plant understory communities in Engelmann spruce (Picea engelmannii)-dominated forests. We sampled fine and coarse woody debris, ground cover, and plant species composition along transects in spruce-beetle...

Urban vacancy is a pressing issue in many cities across the U.S. and globally. A variety of greening strategies have been proposed and implemented for repurposing vacant lots, and their success depends upon the extent to which greening goals address the social needs of residents. The primary contribution of this paper is to explore the relationship between place and community within the context of resident-led beautification of vacant lots. We queried new owners of vacant lots purchased in disenfranchised neighborhoods through the Chicago Large Lot Program in 2015. We used a mixed-methods...

Maple syrup is an important non-timber forest product derived from the sap of the sugar maple (Acer saccharum Marshall). However, maple syrup producers are facing a diversity of challenges, including: potential range shifts in the maple resource; increasing variability in the timing, duration and yield of sap flow and syrup operations; invasive species, pests and diseases; and intergenerational land and business transfer challenges. Members of Maple Syrup Producer Associations in Minnesota, Wisconsin, and Michigan were surveyed to learn about their operations, adaptation strategies,...

Molecular tools are commonly directed at refining taxonomies and the species that constitute their fundamental units. This has been especially insightful for groups for which species hypotheses are ambiguous and have largely been based on morphological differences between certain life stages or sexes, and has added importance when taxa are a focus of conservation efforts. Here, we examine the taxonomic status of Arsapnia arapahoe, a winter stonefly in the family Capniidae that is a species of conservation concern because of its limited abundance and restricted range in northern Colorado,...

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...

Disturbances play a critical role in forest ecosystem dynamics. Disturbances cause changes in forest structure which in turn influence the species composition of the site and alter landscape patterns over time. The impacts of disturbance are seen over a broad spectrum of spatial scales and varying intensities, ranging from biotic agents such as insect and leaf disease outbreaks to abiotic agents such as a windstorm (a standreplacing disturbance). This study utilized Forest Inventory and Analysis (FIA) data collected between 1999 and 2014 in the US Lake States (Michigan, Minnesota, and...

Information collected by the National Woodland Owner Survey, supplemented with state forest property tax program, land use, and socio-economic data, was used to develop a national characterization of participants enrolled in state forest property tax programs and their forest land. Family forest owners who owned a single parcel of forest land, were at least slightly familiar with their state's property tax program, and whose forest land qualified to participate in their state's program were included in the analysis. Landowner and parcel characteristics were organized into eight categories...

Wildfires are getting extreme and more frequent because of increased fuel loads in the forest and extended dry conditions. Prevention of wildfire by fuel treatment methods will generate forest residues in large volumes, which in addition to available logging residues, can be used to produce biofuels and bioproducts. In this study, the techno-economic assessment of three portable systems to produce woodchips briquettes (WCB), torrefiedwoodchips briquettes (TWCB) and biochar from forest residues were evaluated using pilot-scale experimental data. A discounted cash flow rate of return method...