Graduation Date

Spring 2026

Document Type

Thesis

Program

Master of Science degree with a major in Natural Resources, option Forestry, Watershed, & Wildland Sciences

Committee Chair Name

Dr. Pascal Berrill

Committee Chair Affiliation

Cal Poly Humboldt Faculty or Staff

Second Committee Member Name

Dr. Christa Dagley

Second Committee Member Affiliation

Cal Poly Humboldt Faculty or Staff

Third Committee Member Name

Dr. Christoper Looney

Third Committee Member Affiliation

Community Member or Outside Professional

Keywords

Forest management, Sierra Nevada, Ponderosa pine, Wildland urban interface, Silviculture, Forest vegetation simulator, Carbon, Economics, Managment reccomendations, Tahoe National Forest, Climate, Wildfire risk, Forest health

Subject Categories

Forestry

Abstract

This thesis presents a simulation study of various forest stand treatments and their long-term effects on ponderosa pine-dominated forests in the Sierra Nevada Mountain Range of the western USA. The goal was to create recommendations for forest management in the wildland urban interface (WUI) of the Tahoe National Forest and other locations with similar conditions. This study simulates current United States Forest Service (USFS) - Truckee Ranger District silvicultural treatment alternatives repeated over a 100-year period using the USFS Forest Vegetation Simulator (FVS). Proposed treatment alternatives include restoration, resilience, transition, conservation, and no management. Treatments are to be compared in terms of their final stand structure, long term fire resilience, carbon storage, economic viability, and potential forest health issues, to inform landowners of the tradeoffs among alternative treatments in the WUI. Treatment alternatives were found to produce similar potential wildfire behavior and impacts, carbon, and forest health benefits over time, apart from the no-management treatment. Economic analysis showed the restoration and conservation treatments generate net revenue while the transition and resilience treatments did not. Simulated stand structures after 100 years of management met the desired goals and objectives for each treatment’s management objectives, acknowledging the limitations of the FVS model’s predictions as discussed herein. Simulation results and interpretations show that landowners managing in the WUI have freedom to choose management alternatives that support personal objectives while creating forest stand structures that are healthy and foster wildfire resilience. This thesis offers a management decision pathway for landowners to treat ponderosa pine stands in the WUI.

Citation Style

APA

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