Changes in fire regime, forest structure, and tree spatial patterns in ponderosa pine forests of the northern Colorado Front Range, 1860 to 2012 Peter M. Brown 1,4 Chad Julian 2 Laurie Huckaby 3 Paula Fornwalt 3 Michael Battaglia 3 Antony S. Cheng 4 1 Rocky Mountain Tree-Ring Research, Ft. Collins CO 2 Boulder County Parks and Open Space, Boulder CO 3 Rocky Mountain Research Station, Ft. Collins CO 4 Colorado Forest Restoration Institute, Ft. Collins CO
Buffalo Creek (1996) Hi Meadow (2000) Hayman (2002) Black Tiger (1989) Bobcat Gulch (2000) Big Elk (2002) Overland (2003) Four Mile (2010) High Park (2012) Picnic Rock (2004)
Front Range Forest Reconstruction Network* 2012 Field Season: 13 Landscape Units ha plots (3 to 7 plots in each unit) Funded by: Colorado Forest Restoration Institute Arapahoe-Roosevelt National Forest Pike-San Isabel National Forest Rocky Mountain Research Station Boulder County Parks and Open Space Rocky Mountain Tree-Ring Research
FRFRNet Methods: 1. Stem map pre-settlement trees within 0.5 ha plots; -2. Subsample age structure and post-settlement structure in m 2 subplots; 3. Collect all fire-scar evidence in plot and surrounding area.
Lyons Boulder County Parks and Open Space Hall Ranch
Trees ac -1 Current Historical
Red line = DBH Terrestrial LIDAR scan profile for Heil Ranch plot 13 Data from Jason M. Stoker USGS Earth Resources Observation and Science (EROS)
Measured DBH to TLS estimated DBH: HE13
A B C D E F Current Conditions Fuels Treatment Restoration
For more information: Peter Brown,
DBH (cm) “Old” “Transitional” “Young” “Pre-settlement” (ca 1880) living trees, defined as ≥ 25 cm dbh OR by morphology “Post-settlement” living trees, defined as < 25 cm dbh OR by morphology Pre-Post-