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Lance A. Asherin



240 West Prospect Road
Fort Collins, CO 80526
Contact Lance A. Asherin

Current Research

I am the manager for the long-term mensuration research studies in Arizona, Colorado, South Dakota, and Wyoming. I maintain databases associated with mensuration studies and assists in silvicultural research. I am certified as a Region 2 Silviculturist.

Current Silviculture Research I am working on:

  • Developing, implementing, and evaluating the irregular uneven-aged silvicultural system as a viable method for creating resilient forests.
  • Identifying spatial explicit reference conditions for ponderosa pine and dry mixed conifer forests of the Colorado Front Range and the Black Hills for restoration prescription development
  • Assessing spatially heterogeneous forest structure impact on fire behavior
  • Characterizing patterns of tree regeneration following large wildfire
  • Utilizing long-term growth studies to validate and calibrate the Forest Vegetation Simulator


  • Colorado State University, B.S., Forestry, 1985
  • Awards

    Outstanding Science Support, 2011
    Science Support

    Featured Publications


    Graham, Russell T.; Asherin, Lance A.; Jain, Terrie B.; Baggett, Scott; Battaglia, Mike A., 2019. Differing ponderosa pine forest structures, their growth and yield, and mountain pine beetle impacts: Growing stock levels in the Black Hills
    Bottero, Alessandra; D'Amato, Anthony W.; Palik, Brian J.; Bradford, John B.; Fraver, Shawn; Battaglia, Mike A.; Asherin, Lance A., 2017. Density-dependent vulnerability of forest ecosystems to drought
    Lehman, Chadwick P.; Rumble, Mark A.; Battaglia, Mike A.; Mills, Todd R.; Asherin, Lance A., 2016. Influence of mountain pine beetle epidemic on winter habitat conditions for Merriam's turkeys: Management implications for current and future condition
    Graham, Russell T.; Asherin, Lance A.; Battaglia, Mike A.; Jain, Terrie B.; Mata, Stephen A., 2016. Mountain pine beetles: A century of knowledge, control attempts, and impacts central to the Black Hills
    Engelmann spruce stand in a long-term seed production study on the Fraser Experimental Forest, Colorado.
    In 1968, thirteen permanent research plots were established in Engelmann spruce-subalpine fir forests along an elevational gradient on the Fraser Experimental Forest. Seed traps were installed on these plots and have been sampled annually since 1968. In 2011, tree cores were sampled to examine the relationship between climate and seed production.
    Northern goshawk research technician standing in an example of an idealized ponderosa pine forest on the Kaibab Plateau in northern Arizona.
    Throughout the Rocky Mountains over the last century, large ponderosa pine trees provided lumber for growing cities and towns, along with fuel and timber for the mining and railroad industries. Most of these forests are now occupied by dense young and mid-aged forests highly susceptible to being killed by bark beetles and burned by wildfires. These conditions have been exacerbated by fire suppression and urban encroachment. As a result, knowledge is needed to inform management actions directed at restoring and conserving ponderosa pine forests. 
    Example of a forest structure suitable for northern goshawks and producing high quality timber
    Wildlife habitat and timber production are critical elements of the management of many National Forests. The Black Hills National Forest has provided a thriving timber economy for over 100 years. The forest also provides habitat for the northern goshawk, which has been severely impacted by mountain pine beetles. 
    In 1968, thirteen permanent research plots were established in Engelmann spruce-subalpine fir forests along an elevational gradient on the Fraser Experimental Forest. Seed traps were installed on these plots and have been sampled annually since 1968.  
    Through fire management and riparian ecosystem restoration RMRS researchers Terrie Jain, Kate Dwire, and Travis Warziniack are partnering with the University of Idaho and the Idaho City Ranger District to develop, implement, and evaluate different adaptive management strategies to improve the fire resiliency of the Boise National Forest. 
    There is an urgent need to develop adaptive management strategies that foster ecosystem resilience to the impact of climate change and enable forests to adapt to uncertain future conditions. This project utilizes a scientist-land manager partnership to develop, implement, and measure ecological responses in a large-scale replicated study of three adaptive management treatments strategies in the dry mixed conifer forest type.
    The development of ecological restoration treatment prescriptions based on historical forest structure is needed to inform management activities within the Collaborative Forest Landscape Restoration (CFLR) and other restoration efforts. Our goal is to provide managers with locally derived, historically realistic, and climatically sustainable targets for desired future stand and landscape conditions for the Colorado Front Range and South Dakota Black Hills. 

    National Strategic Program Areas: 
    Resource Management and Use
    RMRS Science Program Areas: 
    Forest and Woodland Ecosystems