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Harvard Forest Data Archive

HF436

Juvenile Tree Responses to Soil Warming at Harvard Forest since 1995

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Data

Overview

  • Lead: Jacqueline Mohan
  • Investigators: Serita Frey, Jerry Melillo
  • Contact: Information Manager
  • Start date: 1995
  • End date: 2019
  • Status: ongoing
  • Location: Slab City Tract (Harvard Forest)
  • Latitude: +42.48 degrees
  • Longitude: -72.18 degrees
  • Elevation: 297 meter
  • Datum: WGS84
  • Taxa: Acer pensylvanicum (striped maple), Acer rubrum (red maple), Acer saccharum (sugar maple), Betula alleghaniensis (yellow birch), Betula lenta (black birch), Castanea dentata (american chestnut), Fagus grandifolia (american beech), Fraxinus americana (white ash), Pinus strobus (white pine), Prunus serotina (black cherry), Quercus alba (white oak), Quercus rubra (red oak), Quercus velutina (black oak), Tsuga canadensis (hemlock), Toxicodendron radicans (poison ivy), Viburnum acerifolium (maple-leaf viburnum)
  • Release date: 2023
  • Language: English
  • EML file: knb-lter-hfr.436.2
  • DOI: digital object identifier
  • EDI: data package
  • DataONE: data package
  • Related links:
  • Study type: long-term measurement
  • Research topic: biodiversity studies; large experiments and permanent plot studies; physiological ecology, population dynamics and species interactions; soil carbon and nitrogen dynamics
  • LTER core area: population studies, disturbance patterns
  • Keywords: aboveground biomass, aboveground production, biodiversity, climate change, demography, plant growth, soil temperature, succession, trees
  • Abstract:

    The main goal of this study is to assess eastern tree species’ growth, survivorship, and phenological responses to soil warming in order to forecast future changes in forest succession and carbon dynamics. From 2003 through 2010, we determined that shade-tolerant, normally slower-growing species benefitted most from warming. We are continuing to study species-species responses to investigate the duration of and mechanisms behind species- and functional group responses to climate warming. Monitoring long-term demographic and physiological responses of juvenile trees with and without soil warming will allow us to model future eastern tree species successional shifts under warmer climate conditions.

  • Methods:

    Tree seedlings, saplings and targeted non-tree woody species, namely poison ivy (Toxicodendron radicans), at the Barre Woods soil warming experiment site are measured using non-destructive means. Toward the end of the annual growing season (September, October) plant heights are measured with meter sticks and the diameter at 5-cm height using digital calipers. Diameters of taller trees are measured at 50-, 100- and 150-cm heights to help generate allometric equations estimating plant biomass. Individuals in the original 3.14 m2 round subplots (established in 2003) as well as plots outside these plots but within the 900-m2 area of each treatment site (Control and Heated) are measured. Each individual is tagged with an aluminum tag and its treatment site, plot and subplot location is recorded. Formerly these measurements were done annually. They are now done every other year or so. Terminal bud scars are used to determine the terminal heights for years prior to 2003.

  • Organization: Harvard Forest. 324 North Main Street, Petersham, MA 01366, USA. Phone (978) 724-3302. Fax (978) 724-3595.

  • Project: The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts. (ROR).

  • Funding: National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210. Other funding: National Geographic Society grant NGS-58955R-19.

  • Use: This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.

  • License: Creative Commons Zero v1.0 Universal (CC0-1.0)

  • Citation: Mohan J. 2023. Juvenile Tree Responses to Soil Warming at Harvard Forest since 1995. Harvard Forest Data Archive: HF436 (v.2). Environmental Data Initiative: https://doi.org/10.6073/pasta/376b0907616b34707edf7b9a1ac369d0.

Detailed Metadata

hf436-01: tree measurement data

  1. Treat_HC: warming treatment
    • C: control
    • H: heated
    • U: unknown
  2. PrePrint_tag: tag with pre-printed number used when tagging new recruitments
  3. Original_ID: tag number assigned to the individual when first measured. During the course of time some of these tags fall off or become unreadable and are replaced with another tag.
  4. SPECIES: species of tagged individual
    • ACPE: Acer pensylvanicum
    • ACRU: Acer rubrum
    • ACSA: Acer saccharum
    • BEAL: Betula alleghaniensis
    • BELE: Betula lenta
    • CADE: Castanea dentata
    • FAGR: Fagus grandifolia
    • FRAM: Fraxinus americana
    • PIST: Pinus strobus
    • PRSE: Prunus serotina
    • QUAL: Quercus alba
    • QURU: Quercus rubra
    • QUVE: Quercus velutina
    • SHRUB: shrub
    • Shrub (Not BELE) : shrub (not Betula lenta)
    • TSCA: Tsuga canadensis
    • UNKN: unknown
    • VIAC: Viburnum acerifolium
  5. Subplot: plot ID assigned for the BW experiment. Control and Heated plots both have 36 subplots labeled 1-36.
  6. Round_Plot: 2m diameter round plots. There is no more than one round plot per subplot
  7. DBH19_mm: diameter at breast height (470cm) of individuals greater then 2m in height, 2019 (unit: millimeter / missing value: NA)
  8. D5_2019_mm: diameter at 5cm height, 2019 (unit: millimeter / missing value: NA)
  9. D5_2016_mm: diameter at 5cm height, 2016 (unit: millimeter / missing value: NA)
  10. D5_2014_mm: diameter at 5cm height, 2014 (unit: millimeter / missing value: NA)
  11. HT19 _cm: height at end of growing season, 2019 (unit: centimeter / missing value: NA)
  12. HT18 _cm: height at end of growing season, 2018 (unit: centimeter / missing value: NA)
  13. HT17_cm: height at end of growing season, 2017 (unit: centimeter / missing value: NA)
  14. HT16_cm: height at end of growing season, 2016 (unit: centimeter / missing value: NA)
  15. HT15_cm: height at end of growing season, 2015 (unit: centimeter / missing value: NA)
  16. HT14_Fall_cm: height at end of growing season, 2014 (unit: centimeter / missing value: NA)
  17. HT14_June _cm: height in June, 2014 (unit: centimeter / missing value: NA)
  18. HT13_cm: height at end of growing season, 2013 (unit: centimeter / missing value: NA)
  19. HT12_cm: height at end of growing season cm, 2012 (unit: centimeter / missing value: NA)
  20. HT11_cm: height at end of growing season, 2011 (unit: centimeter / missing value: NA)
  21. HT10_cm: height at end of growing season, 2010 (unit: centimeter / missing value: NA)
  22. HT09_cm: height at end of growing season, 2009 (unit: centimeter / missing value: NA)
  23. HT08_cm: height at end of growing season, 2008 (unit: centimeter / missing value: NA)
  24. HT08_July_cm: height in July 2008 (unit: centimeter / missing value: NA)
  25. HT07_cm: height at end of growing season, 2007 (unit: centimeter / missing value: NA)
  26. HT06_cm: height at end of growing season, 2006 (unit: centimeter / missing value: NA)
  27. HT05_cm: height at end of growing season, 2005 (unit: centimeter / missing value: NA)
  28. HT04_cm: height at end of growing season, 2004 (unit: centimeter / missing value: NA)
  29. HT03_cm: height at end of growing season, 2003 (unit: centimeter / missing value: NA)
  30. HT02_cm: height at end of growing season, 2002 (unit: centimeter / missing value: NA)
  31. HT01 _cm: height at end of growing season, 2001 (unit: centimeter / missing value: NA)
  32. HT00_cm: height at end of growing season, 2000 (unit: centimeter / missing value: NA)
  33. HT99_cm: height at end of growing season, 1999 (unit: centimeter / missing value: NA)
  34. HT98_cm: height at end of growing season, 1998 (unit: centimeter / missing value: NA)
  35. HT97_cm: height at end of growing season, 1997 (unit: centimeter / missing value: NA)
  36. HT96_cm: height at end of growing season, 1996 (unit: centimeter / missing value: NA)
  37. HT95_cm: height at end of growing season, 1995 (unit: centimeter / missing value: NA)
  38. 2019Visual_Light_Estimate_percent: visual estimate of percent of light that makes it to the ground through the canopy, 2019
  39. 2016Visual_Light_Estimate_percent: visual estimate of percent of light that makes it to the ground through the canopy, 2016
  40. 2014Visual_Light_Estimate_percent: visual estimate of percent of light that makes it to the ground through the canopy, 2014
  41. Comments2019: comments, 2019
  42. Comments2016: comments, 2016
  43. Comments2014: comments, 2014
  44. Comments2010: comments, 2010
  45. Outlier: indicator of an outlier in the data analysis
    • X: outlier
  46. DEAD10: status of the individual, 2010
    • 0: alive
    • 1: dead
  47. DEAD09: status of the individual, 2009
    • 0: alive
    • 1: dead
  48. DEAD08: status of the individual, 2008
    • 0: alive
    • 1: dead
  49. DEAD07: status of the individual, 2007
    • 0: alive
    • 1: dead
  50. DEAD06: status of the individual, 2006
    • 0: alive
    • 1: dead
  51. DEAD05: status of the individual, 2005
    • 0: alive
    • 1: dead
  52. DEAD04: status of the individual, 2004
    • 0: alive
    • 1: dead