uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/cd39b1ed5505abfaba563d4c9decb4ee John O'Keefe 2023 English

Measurements of regeneration following removal in 1990 of a 64-year old red pine plantation on the Prospect Hill tract were continued for the twelfth year in 2001. Browsing in 2001 remained at very low levels (less than 2% of stems). As mean tree height continues to increase both the amount of browsing and the impact of browsing on future stand characteristics should remain low. Overall, our observations show that browsing has had little long-term impact during the regeneration of this stand. White ash, the most heavily browsed species, remains the most common species in the plots. After remaining quite stable over the past five years, in 2001 the overall stem density of tree species declined to 17,883 stems/ha, compared with 19,464 stems/ha in 2000, 19,414 stems/ha in 1999, 19,958 stems/ha in 1998, 19,414 stems/ha in 1997, and 20,696 stems/ha in 1996. The relative importance of major species has remained the same over the past six years. In 2001, white ash (36.5%) remained the most numerous tree species, followed by red maple (26.9%), sugar maple (14.4%) and black cherry (9.4%). These percentages changed little from 2000. After a slight decrease in 2000, red oak increased slightly to 7.5% of tree stems in 2001, the majority of which were small seedlings. Overall, the percentage of stems that originated as seedlings rather than sprouts decreased to 19.3%, down from 23.1% in 2000, 23.4% in 1999, 25.4% in 1998, and 23.7% in 1997. The majority of these seedlings (55.7%) were white ash, most less than 0.5 m tall. Mean stem height rose to 3.46 m, compared to 3.20 m in 2000, 3.24 m in 1999, 3.01 m in 1998, 2.92 m in 1997, 2.87 m in 1996 and 2.67 m in 1995. The resumption in mean height growth over the past year probably reflects low seedling establishment and mortality of seedlings and young sprouts less than 0.5 m tall along with continued growth of the taller stems. The tallest stems were 20 white ash, 15 red maples, 15 sugar maples, 6 black cherries, 5 pin cherries, 3 paper birches, and 1 trembling aspen greater than 7 m tall. Diameter at breast height (dbh) is now being recorded for all stems taller than seven meters. Of the five most common species, sugar maple had the tallest mean height (4.75 m), followed by red maple (3.98 m), black cherry (3.69m), and white ash (2.99 m). Because of the preponderance of small seedlings, red oak mean height was only 0.67 m. It remains to be seen how many seedlings will survive to play a role in the developing stand. Our next sampling will be done in year 15.

browsing regeneration timber harvest vegetation dynamics LTER controlled vocabulary disturbance 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=hf047 Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.18676 -72.18676 +42.53178 +42.53178 335 335 meter 1991 2000 ongoing 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

Species, height, origin and evidence of browsing were recorded for all woody stems on 50 milacre (1.13 m radius) plots established on a five-meter grid within the clearcut. A fenced exclosure was initially erected around half of the plots. The exclosure fence has not been maintained since year 5 because no evidence of significant differences in regeneration between the exclosure and the open area was found. Extensive mixed hardwood regeneration (generally less than 7 m tall) was cut back to the ground during harvest, ensuring at least initial dominance by sprouts.

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. hf047-01-regen.csv regeneration data hf047-01-regen.csv 219026 5eee7dcb46f658325ea50c1ffb93dbeb 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p04/hf047/hf047-01-regen.csv plot plot number, composed of the row (1-10) followed by the plot (1-5), ranging from 11 to 105 plot number year year of sampling YYYY species species code, composed of the first two letters of the Latin genus followed by the first two letters of the Latin species. If only two letters are used they represent the genus. ACRU Acer Rubrum red maple ACSA A. saccharum sugar maple AM Amelanchier sp. shadbush BEAL Betula alleghaniensis yellow birchB BEPA B. papyrifera paper birch COAL Cornus alternifolia alternate-leaved dogwood FAGR Fagu grandifolia beech FRAM Fraxinus Americana white ash ILVE Ilex verticillata winterberry LO Lonicera sp. honeysuckle NEMU Nemopanthus mucronata mountain holly PIRE Pinus resinosa red pine PIST P. strobus white pine POTR Populus tremuloides trembling aspen PRPE Prunus pensylvanica pin cherry PRSE P. serotina black cherry QUAL Quercus alba white oak QURU Q. rubra red oak VI Vitis sp. grape VICA Viburnum cassinoides withered VIDE V. dentatutm arrowwood clump clump identifier. These are not tagged or consistent from year to year, but indicate that stems in different height classes are part of the same clump. Stems of seedling origin represent a single stem clump. clump identifier origin origin of stem SE seedling SP sprout browse whether the stem appears browsed 0 none 1 lightly 2 moderately/heavily stem number of stems in the clump within a given height class number 1 natural NA missing value height height class of the stem(s) 1 0.1 - 0.5 m 2 0.5 - 1.0 m 3 1.0 - 2.0 m 4 2.0 - 3.0 m 5 3.0 - 5.0 m 6 5.0 - 7.0 m 7 >7.0 m stem.id unique tag number given to each stem taller than 7 meters, consisting of the plot number followed by the assigned stem number stem identifier dbh diameter at breast height (1.3 m) centimeter 0.05 real NA missing value comments comments comments 6252 plot community long-term measurement