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An Examination of Stand Attributes and the Presence of English holly in a Pacific Northwest Forest, Grays Harbor County, Wash.
(2013-07-23)
English holly (<italic>Ilex aquifolium</italic>) is an ornamental favored by people who appreciate its wildlife benefits and traditional significance. Since its introduction into the Pacific Northwest over one hundred years ago, (<italic>Ilex(</italic> has escaped from cultivation and is increasingly found in natural areas ...
Nonlinear Approaches to Predicting Diameter of the Largest Limb at Breast Height in Young, Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) Plantations Growing in the Pacific Northwest
(2013-02-25)
This study examined two nonlinear modeling methodologies to predict the diameter of the largest limb at breast height (DLLBH) in young, Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) plantations in the Pacific Northwest using a combined power exponential function. The first method examined admitting predictor variables ...
Fire History of the Sierra de Manantlán Biosphere Reserve in Western México
(2013-02-25)
A dendropyrochronological study was conducted in the pine and pine-oak forests of the Las Joyas Scientific Research Station in the Sierra de Manantlán Biosphere Reserve located in the Sierra Madre del Sur mountain range in western México. This study was undertaken to expand our understanding of historical fire frequency in ...
Metal response of Douglas-fir: a comparison of foliar metals and phytochelatin production in trees planted in soils amended with biosolids or metal salts
(2013-11-14)
This study was designed to explore the relationship between metals in soil, foliar metal concentrations and phytochelatin (PC) production in Douglas-fir trees planted in soils amended with biosolids or metal salts. Both a greenhouse and field study were conducted to determine whether PC production could be correlated with ...
Reforesting surface coal-mined land using Douglas-fir seedlings in Washington State
(2013-07-25)
The Surface Mining Control and Reclamation Act of 1977 regulates the reclamation of surface-mined land in the United States. It uses a performance bond program to ensure sufficient resources to reclaim lands after mining. In the Appalachian region, the Forestry Reclamation Approach has led to successful reforestation of ...
Harvest intensity and competing vegetation control have little effect on soil carbon and nitrogen pools in a Pacific Northwest Douglas-fir plantation
(2013-07-25)
Increasing demand for timber as well as current interest in the use of woody biomass for energy and chemical production may result in higher quantities of organic matter removal from plantation forests than currently occurs during harvesting. Two practices that can increase the yield of woody biomass from a harvest site are ...
Riparian Vegetation Structure and Composition in the Fire-Prone Ecosystem of Eastern Washington
(2013-11-14)
The objectives of this study were to compare riparian and upland areas, summarize the range of vegetation conditions present in the second half of the 20th century, and correlate vegetation with processes on the landscape. Matching research to management, the spatial extent of the study was the area managed by the Tapash ...
Modeling habitat suitability of Pinus densiflora in response to climate change in the Korean peninsula and East Asia
(2013-02-25)
The current and future climate suitability of Pinus densiflora in the Korean peninsula, Japan Isles, and parts of northen China was modeled using Random Forest predictors. Pinus densiflora is among the tree species with highest conservation priorities for its historical and cultural importance but distribution of the species ...