uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/dbb88d6de83bf8e2335dd36e42b315d6 Charles McClaugherty 2023 English

Mass loss (estimated by decreases in density) and total nitrogen content (TKN) is measured in decaying logs (1.2 m long and diameter range: 6-50 cm) and sticks (10-30 cm long and diameter less than 5 cm) of red pine (Pinus resinosa Ait.) and red maple (Acer rubrum L.) Logs and sticks were collected from freshly cut trees and placed on the forest floor in a red pine plantation (pine only) or a nearby red maple dominated deciduous forest (maple only) in the Prospect Hill tract. Maple logs and sticks lost density faster than did pine. Total Kjeldahl Nitrogen is measured as a percent of organic matter in red pine and red maple logs. N content differed significantly according to state of decay (p=0.002) but not between species. Total organic phosphorus in Kjeldahl digests is measured as a percent of organic matter in red pine and red maple logs. P content differed significantly according to state of decay (p=0.0008) but not between species.

decomposition nitrogen phosphorus wood LTER controlled vocabulary organic matter 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=hf050 Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.183 -72.181 +42.534 +42.531 360 390 meter 1990 2009 genus Acer species rubrum red maple genus Pinus species resinosa red pine 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

Mass loss was measured directly for sticks and by density (saran coated samples weighed in and out of water) for logs. Nitrogen was determined by Kjeldahl digestion and determination of ammonia in the digestate using flow injection. Nitrogen and phosphorus was measured in decayed red pine and red maple logs collected from the forest after 17 years of decay. Due to fragmentation and infiltration by roots mass loss and density could not be determined. Wood fell into two distinct decay classes. Samples from logs were analyzed for total kjeldahl nitrogen and phosphorus (TKN and TKP) and related to species and decay state.

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. hf050-01-mass.csv mass loss hf050-01-mass.csv 595 bf4bfd0eb40bbed1f48fe6e3eb85f581 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf050/hf050-01-mass.csv species species of wood incubated rm red maple rp red pine type type of wood incubated L log S stick months number of months since initial placement in field number 1 whole NA missing value n number of samples used to estimate density number 1 natural NA missing value density.per percentage of density in samples relative to density of fresh sample dimensionless 0.1 real NA missing value stddev standard deviation of density.per values dimensionless 0.1 real NA missing value tkn.per total Kjeldahl nitrogen as a percent of dry matter dimensionless 0.01 real NA missing value 22 hf050-02-np.csv nitrogen and phosphorus hf050-02-np.csv 712 c932ebf6b11762711e215aa1a9f0a9e5 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p05/hf050/hf050-02-np.csv species species of decayed log from which sample was taken rp red pine rm red maple decay decay class less decayed firm with structural integrity more decayed friable, flexible tkn total Kjeldahl nitrogen (% of ash-free dry mass) dimensionless 0.001 real NA missing value tkp total Kjeldahl phosphorus (% of ash-free dry mass) dimensionless 0.001 real NA missing value 24 plot long-term measurement