uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/56282aba52a563a152ada109f8de091c Lucy Hutyra Steve Raciti https://orcid.org/0000-0002-6793-5068 Preeti Rao https://orcid.org/0000-0002-5549-0583 Researcher Adrien Finzi https://orcid.org/0000-0003-2220-4533 Researcher 2023 English

As part of the Boston University-led, Urban Long-Term Research Area - Exploratory Award (ULTRA-Ex), we established 135 circular, 15 m radius biometric plots extending across two Boston urban-to-rural gradients (Boston MA to Petersham MA and Boston MA to Worcester MA). The plots were stratified based on neighborhood (1 km2 surrounding area) characteristics for population density, impervious surface area fraction, and land cover. Within each plot we measured aboveground live and dead biomass, species characteristics, ground cover characteristics, and soil properties.

biomass carbon nitrogen transects urban LTER controlled vocabulary primary production organic matter inorganic nutrients 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=hf200 Massachusetts. Coordinates based on WGS84 datum. -71.20 -71.78 +42.50 +42.40 0 300 meter 2010 2010 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

For detailed methods, please see: Raciti, S. M., L. R. Hutyra, P. Rao, and A. C. Finzi. 2012. Inconsistent definitions of 'urban' result in different conclusions about the size of urban carbon and nitrogen stocks. Ecological Applications. doi: 10.1890/11-1250.1.

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. hf200-01-ULTRA-veg-soil.csv ULTRA vegetation and soil data hf200-01-ULTRA-veg-soil.csv 10316 93f45195dfe0761d8909bcda17f8de6f 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p20/hf200/hf200-01-ULTRA-veg-soil.csv site site identifier site identifier lu.class land use class (forest, residential, other developed) from 2005 MassGIS landuse layer. http://www.mass.gov/mgis/lus2005.htm land use class date date that the plot was visited to survey biomass, collect soil and leaf samples, and assess other physical characteristics. YYYY-MM-DD live.tree.c live tree carbon in Mg C/ha. Based on DBH (diameter at breast height) measurements of trees 5cm or larger and allometric equations. megagramPerHectare 0.01 real NA missing value total.cwd.c total coarse woody debris (CWD) in Mg C/ha. A value of 0 indicated that no CWD was present at the cite. The minimum size requirements were 10cm in diameter and 1m in length. megagramPerHectare 0.01 real NA missing value bd bulk density of 0-10 cm mineral soil core (mean of 2-3 soil cores collected at the site). An NA value indicates that we were unable to collect a sample. gramsPerCubicCentimeter 0.001 real NA missing value n.per nitrogen percentage of 0 - 10 cm mineral soil (mean of 2-3 soil cores collected at the site). An NA value indicates that we were unable to collect a sample. dimensionless 0.001 real NA missing value c.per carbon percentage of 0 - 10 cm mineral soil (mean of soil cores collected at the site). An NA value indicates that we were unable to collect a sample. dimensionless 0.001 real NA missing value c.n C:N of 0 - 10 cm soil cores (mean of 2-3 soil cores collected at the site). An NA value indicates that we were unable to collect a sample. dimensionless 0.001 real NA missing value n.meas measured nitrogen content of 0 - 10 cm mineral soil in g N/m2. An NA value indicates that we were unable to collect a sample. gramsPerSquareMeter 0.001 real NA missing value c.meas measured carbon content of 0 - 10 cm mineral soil in kg C/m2 (for the top 10cm of soil). An NA value indicates that we were unable to collect a sample. kilogramsPerSquareMeter 0.001 real NA missing value town Massachusetts town in which the field plot was located Massachusetts town in which the field plot was located 142 conservation regional soil long-term measurement https://www.bu.edu/ultra-ex/ megagramPerHectare