Matthew D. Powers

Contemporary Silvicultural Practices in the Western Portion of the Pacific Northwest, USA

Robert A. Slesak, Florian U. Deisenhofer, Matthew D. Powers

Abstract The western portion of the Pacific Northwest (PNW) has some of the most productive and iconic forests of the United States. Management of these forests has changed dramatically over the past three decades, driven by the primary objectives and constraints associated …

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Douglas-fir dominates when grown in dual species mixtures with three western conifers

Robert A. Slesak, Michelle C. Agne, Constance A. Harrington, Matthew D. Powers

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Ecosystem Resiliency to Fire in Temperate Rainforest: a priori hypotheses from long-term data

Matthew G. Betts, Catalina Segura, Kate Lajtha, David M. Bell et autres

1.0 Introduction • 2.0 Setting the Context: fire ecology research in temperate rainforests of the Pacific Northwest • 3.0 Post-fire Vegetation Dynamics • 4.0 Forest Microclimate • 5.0 Hydrology • 6.0 Soil Carbon and Nitrogen • 7.0 Stream Ecosystems • 8.0 Biodiversity …

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Long-term effects of tree spacing during reforestation on survival and growth of three important tree species in the Pacific Northwest, USA

Robert A. Slesak, Michelle C. Agne, Constance A. Harrington, Matthew D. Powers

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Douglas-Fir Dominates When Grown in Dual Species Mixtures with Three Western Conifers

Robert A. Slesak, Michelle C. Agne, Constance A. Harrington, Matthew D. Powers

Trade‐offs among management objectives in mature Douglas‐fir forests of the Pacific Northwest

Neil G. Williams, Matthew D. Powers

Abstract Mature conifer‐dominated forests are an important component of the Pacific Northwest landscape, and the conservation of species associated with late‐successional forests has been a primary management focus in these forests for decades. Increasingly, these forests are also valued as carbon stores, …

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Tree ring widths and multi-objective trade-offs in western Oregon mature stands

Neil G. Williams, Matthew D. Powers

This archive contains research data collected and/or funded by Forest Service Research and Development (FS R&D), U.S. Department of Agriculture. It is a resource for accessing both short and long-term FS R&D research data, which includes Experimental Forest and Range data. It …

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Effects of thinning on tradeoffs between drought resistance, drought resilience, and wood production in mature Douglas-fir in western Oregon, USA

L. Madelene Elfstrom, Matthew D. Powers

Climate projections predict more frequent and severe drought in coastal Pseudotsuga menziesii forests of western North America, raising concerns over how to promote drought adaptation. Thinning often increases drought resistance (the ability to maintain growth during a drought) and resilience (the ability …

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Vegetation recovery rates provide insight into reburn severity in southwestern Oregon, USA

Rebecca N. Weber, Matthew D. Powers, Robert E. Kennedy

Like much of western North America, The Klamath-Siskiyou Ecoregion of southwest Oregon and northern California is experiencing a departure from its historical fire regime, with greater proportions of high severity fire and less low to moderate severity fire compared to historical norms. …

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Estimating Tree Defects with Point Clouds Developed from Active and Passive Sensors

Carli J. Morgan, Matthew D. Powers, Bogdan M. Strîmbu

Traditional inventories require large investments of resources and a trained workforce to measure tree sizes and characteristics that affect wood quality and value, such as the presence of defects and damages. Handheld light detection and ranging (LiDAR) and photogrammetric point clouds developed …

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Evaluating the role of active management in mature Douglas-fir (Pseudotsuga menziesii) stands for songbird conservation

Neil G. Williams, Joan C. Hagar, Matthew D. Powers

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Medium‐term effects of active management on the structure of mature Douglas‐fir (Pseudotsuga menziesii) stands

Neil G. Williams, Matthew D. Powers

Abstract We developed an observational study to (1) examine differences in the structure of mature Douglas‐fir stands representing thinned, structural retention harvest and unmanaged conditions, and (2) assess the extent to which active management in mature stands expedites development of old‐growth structure, …

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