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Proceedings

Reforestation on the Rogue River-Siskiyou National Forest on the Powers and Gold Beach Ranger Districts is driven by the need to accelerate the development of late successional habitat in stands less than 80 years old. Prior regeneration harvest emphasized clear-cutting with regeneration of Douglas-fir. Douglas-fir is not a shade tolerant species and will not regenerate naturally under canopy cover.
The successful reestablishment of native conifer tree stands is a key step in forest restoration. In recent years, high severity wildfires have burned tens of millions of acres of forests in the western United States. Many of these lands require artificial reforestation and subsequent management in order to be fully restored and resilient to future drought, wildfire, and widespread insect attacks.
Healthy, productive ecosystems require diverse plant populations that are adapted to the climates in which they are growing. The concept of local adaptation has been recognized as a critical component to reforestation success and forest productivity for nearly a century, leading to the development of seed zones for forest trees and, more recently, nontree restoration species.
Despite growing interest in restoring and managing oak woodlands and savannas, few silvicultural guidelines and tools are available, particularly for evaluating or adjusting woodland or savanna stand density and overall structure.
The Crosby Farms ASCC site sits in a Saint Paul Park and Recreation Area, owned and managed by the City of Saint Paul, that is embedded within the Mississippi National River and Recreation Area (MNRRA), a national park. Within the 736-acre park, there has been significant mortality of overstory green ash (Fraxinus pennsylvanica) due to the invasive emerald ash borer.
This Proceedings contains the abstracts in English and Spanish of papers presented at the 4th conference on the Madrean Archipeligo held May 14-18, 2018, in Tucson, Arizona. it also contains several full-length papers that expand on the abstracts. The report presents updates on research presently going on in the Madrean Archipeligo region of Arizona, New Mexico, Sonora, and Chihuahua.
Traditionally, the primary focus of cleaning has been to equally space residual trees to maintain full stocking (e.g., 12 x 12 ft or 14 x 14 ft) by removing competition. Preferred species are western white pine, western larch, and ponderosa pine; however, when these species are not sufficiently abundant, shade tolerant species are left to maintain full stocking.
Citizen science allows volunteers to actively participate in the scientific inquiry process and as a discipline has increased in recent years. Many citizen science efforts work across broad spatio-temporal scales, making it possible to address questions that typically cannot be assessed through single studies due to budgetary, time, and scale constraints.
White oak regeneration is both disturbance dependent and advanced growth dependent (Clatterbuck 2019).
The Superior National Forest (SNF) is preparing forest ecosystems for the challenges of continued climate change. Covering over 3 million acres in northern Minnesota, the SNF consists of boreal-temperate transition forests including several species expected to decline over the next century, such as jack pine, black spruce, and quaking aspen.

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