uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/b64c4602b393ea9f45f7149b08ab87f2 Melanie Vanderhoof Christopher Williams https://orcid.org/0000-0002-5047-0639 2023 English

This study explored the effects of log position and microclimate variability on the rates of coarse woody debris (CWD) respiration. The rates of respiration of downed Norway spruce (Picea abies) logs were repeatedly measured in-situ using an LI-6200 gas analyzer. Treatments included native logs in the clearcut site, native logs in a neighboring mature spruce stand, and logs transferred from the clearcut site to the mature spruce stand.

clearcuts coarse woody debris decomposition respiration timber harvest 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=hf221 Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.183 -72.174 +42.546 +42.534 360 403 meter 2011 2011 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

Sampled logs were Norway spruce, 50 cm in length (cut to size in April 2011), within two diameter size classes (8-13 cm and 15-20 cm), and two decay classes (decay class 2 and 3) (as defined by Harmon and Sexton (1996)). Log-level respiration and associated measurements for each log were measured seven times in varying environmental conditions between 26-May-2011 and 20-July-2011. The sample consisted of 48 logs, comprising three treatment groups of 16 logs each (four logs of two size classes of two decay classes). The treatment groups consisted of, 1) mature spruce stand, 2) transfer (spruce logs transferred from clearcut to mature forest site), and 3) clearcut site. Measurements were taken in-situ under ambient conditions to simulate existing conditions to the extent possible. Logs were placed one at a time inside an air tight plastic chamber with a wire rack at the bottom of the chamber to allow for air circulation around the log. An LI-6200 infrared gas analyzer pumped air through the chamber in a closed loop at a set rate. A fan was installed inside the chamber to ensure adequate air circulation. Log-level respiration was calculated as grams of CO2 emitted per unit of wood surface per unit of time.

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. hf221-01-respiration.csv respiration hf221-01-respiration.csv 73735 f81f08e2da64fe09a6337b71443752d3 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p22/hf221/hf221-01-respiration.csv tag number on metal tag attached to each log section number on metal tag attached to each log section NA missing value datetime date and time of measurement YYYY-MM-DDThh:mm NA missing value date date of measurement YYYY-MM-DD 1 day NA missing value time time of measurement hh:mm 1 minute NA missing values site study site study site NA missing value treatment treatment groups treatment groups NA missing value log.weight wet weight of log at time of each measurement gram 0.0001 real NA missing value dry.weight oven dried weight of log gram 1 real NA missing value water.content percent log water content derived from dry and wet log weights dimensionless 0.00000001 real NA missing value weather weather condition at time of measurement weather condition at time of measurement NA missing value last.rain time since last rain 1 less than eight hours 2 less than twenty four hours 3 between twenty four and forty eight hours 4 more than forty eight hours NA missing value log.temp log temperature celsius 1 real NA missing value air.temp air temperature celsius 0.1 real NA missing value air.rh air relative humidity dimensionless 1 real NA missing value soil.temp soil temperature celsius 1 real NA missing value co2.ppm change in CO2 from start to end of measurement dimensionless 0.1 real NA missing value co2.mol change in CO2 from start to end of measurement mole 0.0000001 real NA missing value air.pressure air pressure pascal 0.01 real NA missing value system.vol system volume cubicMeter 0.00000001 real NA missing value log.surface log surface area squareMeter 0.000000001 real NA missing value log.volume log volume cubicMeter 0.000000001 real NA missing value meas.time measurement total time second 0.1 real NA missing value respiration1 rate of log respiration gramsPerMeterSquaredPerSecond 0.0000000001 real NA missing value respiration2 rate of log respiration gramsPerMeterSquaredPerHour 0.000000001 real NA missing value 364 atmosphere short-term measurement https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf220 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf222 gramsPerMeterSquaredPerSecond gramsPerMeterSquaredPerHour