Cessna 350 Corvalis — Service Bulletins

This document is a technical bulletin focused on the biology, ecology, and management of western juniper (Juniperus occidentalis). It synthesizes research findings and provides insights into the distribution, life history, ecology, hydrology, and management practices related to western juniper. The bulletin is intended for land managers, ecologists, and researchers interested in understanding the impacts of western juniper expansion and the best practices for managing this species in the Intermountain West. It discusses the ecological significance of western juniper, its historical expansion patterns, and various management strategies to control its growth and mitigate its effects on local ecosystems.

• Western juniper occupies approximately 9 million acres in the western United States.
• The species has expanded significantly over the past 130 years, impacting local ecosystems.
• Western juniper can live for over 1,000 years and has distinct presettlement and post-settlement communities.
• Effective management strategies include mechanical removal, prescribed fire, and chemical treatments.
• The ecological impacts of western juniper include changes in soil and water dynamics, affecting biodiversity.