uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/fb3059715701832a853ae8bfaff9e9c1 Julian Hadley Susan Cheng Researcher Nicole Smith Researcher 2023 English

Tree growth was measured to determine tree ages and growth rates and to quantify carbon storage in these forests, and to detect changes in growth and carbon storage that could be associated with climate changes or historic disturbances.

aboveground biomass carbon tree growth tree rings LTER controlled vocabulary primary production LTER core area Harvard Forest HFR LTER USA HFR default

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.

Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html CC0-1.0 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf154 Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.185 -72.180 +42.542 +42.539 355 380 meter 2000 2005 complete Information Manager Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 hf-im@lists.fas.harvard.edu Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu

Tree cores were taken at 1.25 m height, aiming toward the center of each tree and mounted in wooden holders. They were then examined under a dissecting microscope connected to a computer, which recorded annual radial growth increments. At the Hemlock site, cores were taken from both the south and north sides of the trunk, whereas due to time limitations only the north side was cored at the Little Prospect Hill site. An attempt was made to reach the oldest growth ring in each tree, but was not always successful. At the Little Prospect Hill site, for some trees radial growth was measured only back to the mid-20th century, prior to a severe fire in 1957 that destroyed most trees within 200 m of the eddy flux tower. The data shows that in the hemlock stand, a few white pines (Pinus strobus) forming a small portion (9%) of the tree basal area are responsible for about 20% of the aboveground carbon storage in the 1990’s. In the deciduous forest at Little Prospect Hill, red oak (Quercus rubra) has continually stored most of the above-ground carbon since the fire in 1957. There was a notable dip in carbon storage at the Little Prospect Hill site in 1980 and 1981, probably due to an infestation of Lymantria dispar during those years.

Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu https://ror.org/059cpzx98 pointOfContact 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. National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210. hf154-01-hem-trees.csv Hemlock trees hf154-01-hem-trees.csv 7475 d6e0c859d28d798ee3f817cf9586691d 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p15/hf154/hf154-01-hem-trees.csv core.id1 core ID from north side of tree core ID from north side of tree core.id2 core ID from south side of tree core ID from south side of tree tag tree tag number tree tag number species genus and species of tree. For genus, A = Acer, B = Betula, F = Fagus, P = Pinus, Q = Quercus genus and species of tree distance distance from Hemlock tower base meter 1 natural NA missing value transect compass bearing (degrees from north) of transect on which plot occurs degree 1 whole NA missing value diam tree diameter at 1.25m meter 0.001 real NA missing value ba basal area at 1.25m squareMeter 0.001 real NA missing value sapwood1 thickness of sapwood on north side of tree centimeter 0.1 real NA missing value sapwood2 thickness of sapwood on south side of tree centimeter 0.1 real NA missing value 122 hf154-02-hem-cores.csv Hemlock cores hf154-02-hem-cores.csv 508520 34fd9d304b9e00fe707cf2e169ff55d7 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p15/hf154/hf154-02-hem-cores.csv core.year year core was taken YYYY core.id unique core ID, n indicates core taken from north side of tree and s indicates south unique core ID year growth year YYYY ring.width annual radial growth centimeter 0.01 real NA missing value 21275 hf154-03-lph-cores.csv Little Prospect Hill cores hf154-03-lph-cores.csv 379896 73be404d6fbfad53d53746ecfcc27e21 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p15/hf154/hf154-03-lph-cores.csv core.year year core was taken YYYY distance distance from Little Prospect Hill tower base meter 1 natural NA missing value transect compass bearing (degrees from north) of transect on which plot occurs degree 1 whole NA missing value tag tree tag number tree tag number species genus and species of tree. For genus, A = Acer, B = Betula, F = Fagus, P = Pinus, Q = Quercus genus and species of tree year growth year YYYY ring.width annual radial growth centimeter 0.001 real NA missing value 9633 plot long-term measurement https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf069 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf149 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf103 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf072