uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/b9f81dc15370a3bc1b28136d85139772 Eric Davidson https://orcid.org/0000-0002-8525-8697 Kathleen Savage https://orcid.org/0000-0002-1649-5314 2023 English

Soil respiration (SR) is a combination of autotrophic (root respiration) and heterotrophic (microbial respiration). As a combination of these two belowground processes, separating their relative contributions to SR from is difficult. The hemlock removal experiment provided an opportunity to look at these two components of SR. Girdling and logging result in the death and/or removal of aboveground biomass (trees) and subsequently death of root biomass. As a result the measured respiration in these treatment plots should then be comprised primarily of the microbial respiration component of SR. By measuring SR in control plots, and taking the difference with girdled and logged plots, we may determine the relative contribution of root and microbial respiration.

hemlock hemlock woolly adelgid soil respiration soil temperature timber harvest LTER controlled vocabulary inorganic nutrients 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=hf130 Simes Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.22 -72.21 +42.48 +42.47 200 240 meter 2003 2009 genus Tsuga species canadensis eastern hemlock 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

There are 6 collars at each site. Collars (10” diameter thin walled PVC pipe cut to 10cm lengths) are placed in the ground (approximately 5cm depth) and left during the course of the experiment. Soil CO2 flux (mg C m-2 h-1) is measured by placing a chamber over collars. The sampling duration is a 5 minute period, where the first 30secs are ambient air CO2 concentrations. The chambertop is then placed over the collar and air from the chamber headspace is pumped into an Infrared Gas Analyzer (LICOR 6252) at a rate of 0.5L/min for a 4.5 minute period. The change in headspace CO2 concentration is recorded every 12s for 4.5 minutes using an HP200LX palmtop. A linear regression in the change in headspace concentration over time, along with air temperature, atmospheric pressure and chamber surface area are used to convert these measurements to units of mg C m-2 hr-1. Soil temperature and moisture are measured concurrently with SR. Soil temperature (degrees Celsius) is taken using thermocouples located at 10cm depth at each of the collars. Measurements are read using a Barnant Temperature Reader. Soil moisture is measured using a Campbell Scientific handheld water content reflectometer. This system has two 10cm long probes that are inserted vertically from the surface into the ground. Measures soil moisture represents and integrated estimate of soil moisture over the top 10cm of the soil horizon.

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. hf130-01-soil-respiration.csv soil respiration hf130-01-soil-respiration.csv 148231 0a81508b29f71e3c590bddd9a74507e2 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p13/hf130/hf130-01-soil-respiration.csv datetime date and time YYYY-MM-DDThh:mm NA missing value date date YYYY-MM-DD doy day of year nominalDay 1 natural NA missing value plot plot number plot number treat treatment Girdled Girdled Logged Logged Control Control collar collar number collar number time time hh:mm NA missing value s.resp soil respiration (mg C m-2 hr-1) milligramPerMeterSquaredPerHour 0.01 real NA missing value s.temp soil temperature at 10 cm depth celsius 0.1 real NA missing value 2358 hf130-02-soil-moisture.csv soil moisture hf130-02-soil-moisture.csv 3365 e881833bbc3a43e470f7e982e1d67bab 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p13/hf130/hf130-02-soil-moisture.csv date date of measurement YYYY-MM-DD year year of measurement YYYY NA missing value ym year and month of measurement YYYYMM ymd year, month and day of measurement YYYYMMDD NA missing value doy day of year nominalDay 1 natural NA missing value moist1 percent soil moisture in plot 1 dimensionless 1 whole NA missing value moist2 percent soil moisture in plot 2 dimensionless 1 whole NA missing value moist3 percent soil moisture in plot 3 dimensionless 1 whole NA missing value moist4 percent soil moisture in plot 4 dimensionless 1 whole NA missing value moist5 percent soil moisture in plot 5 dimensionless 1 whole NA missing value moist6 percent soil moisture in plot 6 dimensionless 1 whole NA missing value 61 soil long-term measurement https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf006 milligramPerMeterSquaredPerHour