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Changes in fire regime, forest structure, and tree spatial patterns in ponderosa pine forests of the northern Colorado Front Range, 1860 to 2012 Peter.

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Presentation on theme: "Changes in fire regime, forest structure, and tree spatial patterns in ponderosa pine forests of the northern Colorado Front Range, 1860 to 2012 Peter."— Presentation transcript:

1 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

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4 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)

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7 Front Range Forest Reconstruction Network* 2012 Field Season: 13 Landscape Units 73 0.5 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

8 FRFRNet Methods: 1. Stem map pre-settlement trees within 0.5 ha plots; -2. Subsample age structure and post-settlement structure in 4 500 m 2 subplots; 3. Collect all fire-scar evidence in plot and surrounding area.

9 Lyons Boulder County Parks and Open Space Hall Ranch

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17 http://photosynth.net/view.aspx?cid=b5b79dde-55e2-4d01-9d3e-2ae09cd74a6f

18 Trees ac -1 Current Historical

19 Red line = DBH Terrestrial LIDAR scan profile for Heil Ranch plot 13 Data from Jason M. Stoker USGS Earth Resources Observation and Science (EROS)

20 Measured DBH to TLS estimated DBH: HE13

21 A B C D E F Current Conditions Fuels Treatment Restoration

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26 For more information: Peter Brown, pmb@rmtrr.org

27 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-

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