You are here

Harvard Forest Data Archive

HF175

Tree Growth and Coarse Woody Debris in Regenerating Forests at Harvard Forest since 2008

Related Publications

Data

Overview

  • Lead: Allison Dunn
  • Investigators:
  • Contact: Allison Dunn
  • Start date: 2008
  • End date: 2016
  • Status: ongoing
  • Location: Prospect Hill Tract (Harvard Forest)
  • Latitude: +42.53
  • Longitude: -72.19
  • Elevation: 335 meter
  • Taxa:
  • Release date: 2017
  • Revisions:
  • EML file: knb-lter-hfr.175.10
  • DOI: digital object identifier
  • Related links:
  • Study type: long-term measurement
  • Research topic: forest-atmosphere exchange; large experiments and permanent plot studies; physiological ecology, population dynamics and species interactions
  • LTER core area: disturbance
  • Keywords: coarse woody debris, ice, regeneration, succession, timber harvest, vegetation dynamics
  • Abstract:

    This project is a field-based study to measure sequestration of atmospheric carbon dioxide in a regenerating New England forest. This study established long-term biometric plots suitable for measuring changes in carbon storage through time in three forest stands: an early-20th-century conifer plantation, a naturally regenerating former conifer plantation harvested in the 1990s, and a conifer plantation scheduled for harvest next winter. The first three years of this project determined the initial carbon budget of these forest stands, measured carbon fluxes into and out of these stands, and laid the groundwork for future investigations. Subsequent years will investigate larger-scale questions, such as how successional patterns affect carbon sequestration, and how these patterns change with stand age. The work also addresses how forestry practices influence carbon sequestration, and provide guidance for how forest management could enhance terrestrial carbon uptake in the future.

  • Methods:

    This study’s experimental design consists of eighteen plots across three separate study areas. One study area (Control) is the unharvested portion of plantation 25-H in the Prospect Hill Tract, which was planted in 1925 with red pine (Pinus resinosa). Another study area (Harvest 1990) is a former red pine plantation to the west that was harvested in 1990 (same area as studied by O'Keefe, 2000.) The last study area (Harvest 2008) is the portion of plantation 25-H in the Prospect Hill Tract that was clearcut in May-June 2008. Six 10-m radius circular plots were established at random locations in each of the study areas, named ConA-F, H90A-F, and H08A-F. All trees at least 5 cm diameter breast height (DBH; 1.3 m) were identified, measured, and tagged, totaling nearly 800 trees. Coarse and fine woody debris at least 2.5 cm diameter was surveyed using the line-intercept method (Van Wagner 1968) along randomly oriented 10 m transects. DBH surveys were conducted in 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 and 2016; woody debris surveys in 2008 and 2010. Aboveground woody biomass was calculated using species-specific allometric equations (Jenkins et al., 2003). Woody debris biomass was calculated using the methods of Van Wagner (1968) and the decay-class specific bulk densities of Liu et al. (2007).

  • Use:

    This dataset is released to the public under Creative Commons license CC BY (Attribution). Please keep the designated contact person informed of any plans to use the dataset. Consultation or collaboration with the original investigators is strongly encouraged. Publications and data products that make use of the dataset must include proper acknowledgement.

  • Citation:

    Dunn A. 2017. Tree Growth and Coarse Woody Debris in Regenerating Forests at Harvard Forest since 2008. Harvard Forest Data Archive: HF175.

Detailed Metadata

hf175-01: dbh

  1. site: site, Control (CON A-F), Harvest 1990 (H90 A-F), and Harvest 2008 (H08 A-F)
  2. treatment: treatment
    • harvest: harvest site in former red pine plantation, harvested in 1990
    • control: control site in former plantation 25-H
  3. tree: tree ID
  4. species: species
    • sm: sugar maple
    • wa: white ash
    • ro: red oak
    • bc: black cherry
    • rm: red maple
    • NA: no data
    • pb: paper birch
    • bf: balsam fir
    • b: beech
    • bb: black birch
    • ws: white spruce
    • wp: white pine
    • gb: grey birch
    • ae: american elm
    • rp: red pine
    • yb: yellow birch
    • h: hemlock
  5. dbh.2008.08: diameter measured at breast height in August 2008 (unit: centimeter / missing value: NA)
  6. note.2008.08: measurement notes in August 2008
  7. dbh.2009.08: diameter measured at breast height in August 2009 (unit: centimeter / missing value: NA)
  8. note.2009.08: measurement notes in August 2009
  9. dbh.2010.06: diameter measured at breast height in June 2010 (unit: centimeter / missing value: NA)
  10. note.2010.06: measurement notes in June 2010
  11. dbh.2010.09: diameter measured at breast height in September 2010 (unit: centimeter / missing value: NA)
  12. note.2010.09: measurement notes in September 2010
  13. dbh.2011.09: diameter measured at breast height in September 2011 (unit: centimeter / missing value: NA)
  14. note.2011.09: measurement notes in September 2011
  15. dbh.2012.08: diameter measured at breast height in August 2012 (unit: centimeter / missing value: NA)
  16. note.2012.08: measurement notes in August 2012
  17. dbh.2013.08: diameter measured at breast height in August 2013 (unit: centimeter / missing value: NA)
  18. note.2013.08: measurement notes in August 2013
  19. dbh.2014.08: diameter measured at breast height in August 2014 (unit: centimeter / missing value: NA)
  20. note.2014.08: measurement notes in August 2014
  21. dbh.2015.08: diameter measured at breast height in August 2015 (unit: centimeter / missing value: NA)
  22. note.2015.08: measurement notes in August 2015
  23. dbh.2016.08: diameter measured at breast height in August 2016 (unit: centimeter / missing value: NA)
  24. note.2016.08: measurement notes in August 2016

hf175-02: cwd

  1. date: date
  2. site: site, Control (CON A-F), Harvest 1990 (H90 A-F), and Harvest 2008 (H08 A-F)
  3. transect: transect (three 10-m transects were measured at each site)
  4. diameter: diameter of wood (unit: centimeter / missing value: NA)
  5. decay.class: decay class (following naming convention of Liu et al. 2006)
  6. type: type of woody debris

hf175-03: dbh notes, 2008-2013

  1. date: date
  2. plot: plot ID
  3. treatment: treatment
    • harvest: harvest site in former red pine plantation, harvested in 1990
    • control: control site in former plantation 25-H
  4. tree: tree ID
  5. notes: measurement notes