Treesearch

Community and stakeholder engagement is increasingly recognized as essential to science at the nexus of food, energy, and water systems (FEWS) to address complex issues surrounding food and energy production and water provision for society. Yet no comprehensive framework exists for supporting best practices in community and stakeholder engagement for FEWS. A review and meta‐synthesis were undertaken of a broad range of existing models, frameworks, and toolkits for community and stakeholder engagement. A framework is proposed that comprises situational awareness of the FEWS place or...

On wood surfaces and in planar section, zones lines appear as narrow and sharply delineated dark lines within wood visibly altered ("spalted") by the decay process. In intact wood, zone lines define an irregular volume of decaying wood. They are primarily aggregations ofmelanised hyphae that enclosewood being decayed by a single genetic individual of a wood decay fungus. In the industry for speciality wood products, zone lines are highly valued, especially for decorative pieces produced from wood turnery. While zone lines are commonly found in naturally infectedwood, they can also be...

Urban forest patches can provide critical ecosystem services and their ability to regenerate native tree species is critical to their sustainability. Little is known about native tree seedling establishment and physiological function in urban ecosystems. This growth chamber study examined the effects of urban soil and air temperatures on white oak (Quercus alba L.) germination, seedling growth, and leaf-level physiology. A split-plot design tested effects of field collected soils from urban and reference forest sites in Baltimore, Maryland, and warm (urban) versus cool (rural) growth...

The European strain of the gypsy moth, Lymantria dispar L. (Lepidoptera: Erebidae) was accidentally introduced to North America over 100 years ago and despite its explosive population growth there, the species still only occupies less than 1/3 of its potential range. While this slow rate of spread can be attributed in part to the limited dispersal capacities of this strain, its constrained distribution mainly reflects the success of efforts to limit range expansion of this species. Currently, two major area-wide programmes are operated to limit the spread of the gypsy moth in the USA, in...

Industrial forestry in boreal regions increases fragmentation and may decrease the viability of some wildlife populations, particularly the woodland caribou, Rangifer tarandus caribou. Caribou protection often calls for changes in forestry practices, which may increase the cost and reduce the available timber supply. We present a linear programming model that assesses the trade‐off between habitat protection and harvesting objectives by combining harvest scheduling and optimal habitat connectivity problems. We formulate the habitat connectivity model as a network flow problem that maximizes...

Southeastern forests are no strangers to fire. Historically, frequent fire was prevalent across the landscape (Guyette and others 2012; Lafon and others 2017). Today, however, wildfire affects southeastern upland hardwood forests only to a limited extent due to effective fire suppression. (An exception of note was in 2016, when the Great Smoky Mountains National Park experienced a 17,000-acre wildfire near Gatlinburg, TN, killing 14 people and causing $500 million in damage.) Most fires are quickly suppressed; human-ignited wildfires are normally small in area, driven by climate, terrain,...

The Pinyon Jay is a highly social, year-round inhabitant of pinyon-juniper and other coniferous woodlands in the western United States. Range-wide, Pinyon Jays have declined ~ 3-4% per year for at least the last half-century. Occurrence patterns and habitat use of Pinyon Jays have not been well characterized across much of the species’ range, and obtaining this information is necessary for better understanding the causes of ongoing declines and determining useful conservation strategies. Additionally, it is important to better understand if and how targeted removal of pinyon-juniper...

In response to the strategic plan required by the Agricultural Act of 2014, the USDA Forest Service Forest Inventory and Analysis (FIA) program is initiating a strategic inventory of the nation’s urban forests. The inventory is designed to provide timely and credible data on urban forests, thereby meeting an expanding need for information on trees located in communities where more than 80% of people live. The program monitors the status and trends of trees in urban settings (i.e., urban forests), enabling assessment of their composition and structure, ecosystem services and values, health,...

The vertical turbulent transfer of heat and momentum in the lower atmospheric boundary layer is accomplished through intermittent sweep, ejection, outward interaction, and inward interaction events associated with turbulent updrafts and downdrafts. These events, collectively referred to as sweep–ejection dynamics, have been studied extensively in forested and nonforested environments and reported in the literature. However, little is known about the sweep–ejection dynamics that occur in response to turbulence regimes induced by wildland fires in forested and nonforested environments. This...