uid=HFR,o=lter,dc=ecoinformatics,dc=org
all
public
read
doi:10.6073/pasta/25a22f641d1e390a2baac4b0ea63515d
Carbon Budget at the Harvard Forest 1992-2015
Adrien
Finzi
https://orcid.org/0000-0003-2220-4533
Marc-Andre
Giasson
Audrey
Barker Plotkin
https://orcid.org/0000-0002-4473-9785
John
Aber
Researcher
Emery
Boose
https://orcid.org/0000-0003-4820-0231
Researcher
Eric
Davidson
https://orcid.org/0000-0002-8525-8697
Researcher
Michael
Dietze
https://orcid.org/0000-0002-2324-2518
Researcher
Aaron
Ellison
https://orcid.org/0000-0003-4151-6081
Researcher
David
Foster
https://orcid.org/0000-0003-1171-3762
Researcher
Serita
Frey
https://orcid.org/0000-0002-9221-5919
Researcher
Evan
Goldman
Researcher
Trevor
Keenan
https://orcid.org/0000-0002-3347-0258
Researcher
Jerry
Melillo
Researcher
William
Munger
Researcher
Knute
Nadelhoffer
https://orcid.org/0000-0001-9775-894X
Researcher
David
Orwig
https://orcid.org/0000-0001-7822-3560
Researcher
Scott
Ollinger
https://orcid.org/0000-0001-6226-1431
Researcher
Neil
Pederson
https://orcid.org/0000-0003-3830-263X
Researcher
Andrew
Richardson
https://orcid.org/0000-0002-0148-6714
Researcher
Kathleen
Savage
https://orcid.org/0000-0002-1649-5314
Researcher
Jim
Tang
https://orcid.org/0000-0003-2498-9012
Researcher
Jonathan
Thompson
https://orcid.org/0000-0003-0512-1226
Researcher
Christopher
Williams
https://orcid.org/0000-0002-5047-0639
Researcher
Steven
Wofsy
https://orcid.org/0000-0002-3133-2089
Researcher
Zaixing
Zhou
https://orcid.org/0000-0003-1895-0891
Researcher
2023
English
How, where, and why carbon (C) moves into and out of an ecosystem through time are long-standing questions in biogeochemistry. Here, we bring together hundreds of thousands of C-cycle observations at the Harvard Forest in central Massachusetts, USA, a mid-latitude landscape dominated by 80–120-year-old closed-canopy forests. These data answered four questions:
(i) where and how much C is presently stored in dominant forest types; (ii) what are current rates of C accrual or loss; (iii) what biotic and abiotic factors contribute to variability in these rates; and (iv) is climate change affecting the forest’s C cycle?
Harvard Forest is an active C sink resulting from forest regrowth following land abandonment. Soil and tree biomass comprise nearly equal portions of existing C stocks. Net primary production (NPP) averaged 750–970 g C m-2 yr-1; belowground NPP contributed 30–60% of the total. Mineral soil C measured in the same inventory plots in 1992 and 2013 were too heterogeneous to detect change in soil-C pools; however, radiocarbon data suggest a small but persistent sink of 10–30 g C m-2 yr-1. Net ecosystem production (NEP) in hardwood stands averaged ~300 g C m-2 yr-1. NEP in hemlock-dominated forests averaged ~450 g C m-2 yr-1 prior to infestation by the hemlock woolly adelgid (HWA) in 2013, and then became a net C source. Stand dynamics and climate change in the last three decades enhanced the C sink in hardwood stands; NPP increased 26% between 2000–2014 (p = 0.02) and NEP increased 93% between 1992–2015 (p = 0.13). Compared to long-term global change experiments at the Harvard Forest, the C sink in regrowing biomass equaled or exceeded C cycle modifications imposed by soil warming, N saturation, and hemlock removal. Median forest biomass in the surrounding ecoregion was only 78% of that at the Harvard Forest due to higher timber harvesting rates across the region. Results of this synthesis and comparison to simulation models suggest that forests across the region are likely to accrue C for decades to come but may be disrupted if the frequency or severity of disturbance increases.
biomass
carbon
climate change
land use
litterfall
net primary production
soil respiration
LTER controlled vocabulary
primary production
organic matter
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=hf324
Harvard Forest. Coordinates based on WGS84 datum.
-72.24
-72.16
+42.56
+42.45
220
410
meter
1992
2015
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
We compiled data from 84 data tables from the Harvard Forest Data Archive, in addition to a few unpublished data sets (included here). From these, we compiled the following synthetic data sets. The R and MATLAB code is archived here, so that these compilations may be re-created or updated as data are added over time.
1. Live trees and their biomass by tree (129,348 observations; each row is a tree by year observation)
2. Litterfall (1301 observations; each row is a plot by year observation)
3. Coarse woody debris (9312 observations; each row is a piece by year observation)
4. Fine woody debris (1635 observations; each row is a plot by year observation)
5. Standing dead wood (5539 observations; each row is a piece by year observation)
6. Soil carbon (2927 observations; each row is a core by time observation)
7. Fine root biomass (3145 observations; each row is a sample by time observation)
We also compiled eddy-flux and meteorological data from the EMS tower (HF004), HEM tower (HF103), and CC tower (hf233).
Harvard Forest Long-Term Ecological Research
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.
hf324-01-tree-biomass.csv
live trees biomass
hf324-01-tree-biomass.csv
24742173
8de433b6cd3107e7e8ab4b1dcd69afd6
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-01-tree-biomass.csv
year
year of measurement
YYYY
1 year
NA
missing value
year1
date used to scale up to plot-level measurements. For projects hf032,
the years 1987, 1991 & 1992 are lumped as 1991; for project hf126, the years 2003, 2004,
2005, 2006 are lumped as 2004
YYYY
1 year
NA
missing value
doy
day of year
nominalDay
1
natural
NA
missing value
archive
Harvard Forest Data Archive number
Harvard Forest Data Archive number
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
project
project name
proiect name
NA
missing value
type
forest type
hardwood
hardwood
conifer
conifer
NA
missing value
size
plot area (m2). To scale up, use this area (m2) with trees grouped by
project, plot and year1
squareMeter
0.0000001
real
NA
missing value
lat
latitude
degree
0.001
real
NA
missing value
long
longitude
degree
0.001
real
NA
missing value
obs.exp
whether observational or experimental measurement
obs
observational
exp
experimental
NA
missing value
treatment
if experimental, treatment type
pulldown
pulldown
NA
missing value
treat.year
if experimental, treatment year
if experimental, treatment year
NA
missing value
tract
Harvard Forest tract name
PH
Prospect Hill
PISGAH
Pisgah
SC
Slab City
SIMES
Simes
TS
Tom Swamp
NA
missing vlaue
site
specific site of plot
specific site of plot
NA
missing value
plot
plot identifier. Its size matches the 'size' column
plot identifier. Its size matches the 'size' column
NA
missing value
subplot
subsection of plot
subsection of plot
NA
missing value
subsize
size in m2 of subplots
squareMeter
0.01
real
NA
missing value
tree
tree identifier
tree identifier
NA
missing value
species
tree species
ABBA
Abies balsamea
ACPE
Acer pensylvanicum
ACRU
Acer rubrum
ACSA
Acer saccharum
ACSC
Acer spicatum
ACSP
Acer spp.
ALIN
Alnus incata
BEAL
Betula alleghaniensis
BELE
Betula lenta
BEPA
Betula papyrifera
BEPO
Betula populifolia
BESP
Betula spp.
CACA
Carpinus caroliniana
CADE
Castanea dentata
CAGL
Carya glabra
CAOV
Carya ovata
CASP
Carya species
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
FRNI
Fraxinus nigra
HAVI
Hammamelis virginiana
JUVI
Juniperus virginiana
LASP
Larix spp.
NYSY
Nyssa sylvatica
OSVI
Ostrya virginiana
PIAB
Picea abies
PIGL
Picea glauca
PIRE
Pinus resinosa
PIRI
Pinus rigida
PIRU
Picea rubens
PISP
Picea spp.
PIST
Pinus strobus
PISY
Pinus sylvestris
POGR
Populus grandidentata
POSP
Populus spp.
PRPE
Prunus pensylvanica
PRSE
Prunus serotina
PRVI
Prunus virginiana
QUAL
Quercus alba
QUBI
Quercus bicolor
QUCO
Quercus coccinea
QURU
Quercus rubra
QUVE
Quercus velutina
ROPS
Robinia pseudo-acacia
SOAM
Sorbus americana
TIAM
Tilia americana
TSCA
Tsuga canadensis
ULAM
Ulmus americana
ULSP
Ulmus spp.
UNK
unknown
NA
missing value
dbh
diameter at breast height
centimeter
0.01
real
NA
missing value
method
method of measurement
dbh
diameter at breast height
dendro
dendrometer
NA
missing value
min.dbh
minimum diameter tree measured in a study
centimeter
0.1
real
NA
missing value
interval
number of years between the current measurement and the prior measurement,
where applicable
number
1
whole
NA
missing value
dbhprior
diameter at breast height (cm), at the prior measurement, or for recruits,
the minimum dbh in the study
centimeter
0.1
real
NA
missing value
cond
condition
L
Live. For individually tagged tree with demographic information, tree was
live and censused in the prior measurement
M
Mortality. A tree that was live in the prior census but died between the prior
and current census
miss
Missed. For projects with individually tracked trees, a tree that was missed
in the current census.
R
Recruit. For individually tagged trees, a tree that grew into the minimum size
class since the prior census.
NA
missing value
demography
demography
yes
project in which trees are individually tracked
no
project in which trees are not individually tracked
NA
missing value
biomass.af20
biomass of the tree, calculated using species-specific allometry
equations
kilogram
0.000000001
real
NA
missing value
biomassprior.af20
biomass of the tree at its prior measurement, if any, calculated using
species specific allometry equations
kilogram
0.000000001
real
NA
missing value
rootratio
estimated ratio of coarse root biomass to aboveground biomass at tree's
prior measurement (if any) based on species group and tree diamter, based on Jenkins et al.
2004
dimensionless
0.000000001
real
NA
missing value
rootratioprior
estimated ratio of coarse root biomass to aboveground biomass based on
species group and tree diameter, based on Jenkins et al. 2005
dimensionless
0.000000001
real
NA
missing value
coarseroot.kg
biomass.af20*rootratio, estimated coarse root
biomass
kilogram
0.000000001
real
NA
missing value
coarseroot.kgprior
biomassprior.af20*rootratioprior, estimated coarse root biomass at tree's
prior measurement, if any
kilogram
0.000000001
real
NA
missing value
129348
hf324-02-litterfall.csv
litterfall
hf324-02-litterfall.csv
165605
44059f51eea5d1292493c7482ff05fe0
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-02-litterfall.csv
year
litter year (usually sept to aug of following year, year given is from
beginning of interval)
YYYY
1 year
NA
missing value
archive
Harvard Forest Data Archive number
Harvard Forest Data Archive number
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
project
project name
project name
NA
missing value
type
forest type
conifer
conifer
hardwood
hardwood
size
plot area
squareMeter
0.0000001
real
NA
missing value
lat
latitude
degree
0.000001
real
NA
missing value
long
longitude
degree
0.000001
real
NA
missing value
obs.exp
whether observational or experimental measurement
obs
observational
exp
experimental
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
if experimental, treatment year
NA
missing value
tract
Harvard Forest tract name
Harvard Forest tract name
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
nbasket
number of litter baskets per plot
number
0.000000001
real
NA
missing value
bask.area
area of opening of litter basket
squareMeter
0.00000001
real
NA
missing value
foliar.gcm2
foliar (leaf only) litter mass. In some cases, this might include flowers
and fruits but not cones (g carbon per m2)
gramsPerSquareMeter
0.000000001
real
NA
missing value
nonfoliar.gcm2
twigs, wood, and where separable also fruits, flowers, acorns, cones (g
carbon per m2)
gramsPerSquareMeter
0.000000001
real
NA
missing value
total.gcm2
total litterfall mass (g carbon per m2)
gramsPerSquareMeter
0.000000001
real
NA
missing value
notes
notes
notes
1301
hf324-03-cwd.csv
coarse woody debris
hf324-03-cwd.csv
1618179
05dfd1c1c0b6ba5718d079deeba98bb5
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-03-cwd.csv
year
year of measurement
YYYY
1 year
NA
missing value
project
project nickname
project nickname
NA
missing value
archive
Harvard Forest Data Archive number
Harvard Forest Data Archive number
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
lat
latitude
degree
0.000000001
real
NA
missing value
long
longitude
degree
0.000000001
real
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
type
forest type
conifer
conifer
hardwood
hardwood
NA
missing value
obs.exp
whether observational or experimental measurement
obs
observational
exp
experimental
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
PH
Prospect Hill
PISGAH
Pisgah (in New Hampshire)
Simes
Harvard Simes Tract
SimesTrust
land owned by Simes Trust, just south/east of PH gate 8
TS
Tom Swamp
NA
missing value
method
inventory method for CWD
linetran
down wood measured along intersections with a line transect
1
down wood measured within a fixed-radius plot; calculate volume as frustum of
cone inputting baseD; topD; length.m
1a
down wood measured within a fixed-radius plot; calculate volume using Newton's
formula, inputting baseD; midD; topD; length.m
NA
missing value
plot.size.m2
area of plot for plot method
squareMeter
0.0001
real
NA
missing value
transect
transect identifier, for linetran method; note: for linetran method, sum
up volume or mass by aggregating by plot+transect ID
transect identifier
NA
missing value
tran.length.m
transect length for linetran method
meter
0.01
real
NA
missing value
species
tree species
ACPE
Acer pensylvanicum
ACRU
Acer rubrum
ACSA
Acer saccharum
ACSP
Acer spp.
BEAL
Betula alleghaniensis
BELE
Betula lenta
BEPA
Betula papyrifera
BEPO
Betula populifolia
BESP
Betula spp.
CADE
Castanea dentata
CASP
Carya species
CONF
conifer
DECD
deciduous
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
HAVI
Hammamelis virginiana
OSVI
Ostrya virginiana
PIAB
Picea abies
PIGL
Picea glauca
PI
Picea species not specified
PIRE
Pinus resinosa
PIRU
Picea rubens
PISP
Picea spp.
PIST
Pinus strobus
PRSE
Prunus serotina
PRSP
Prunus species not specified
QUAL
Quercus alba
QURU
Quercus rubra
QUSP
Quercus species not specified
TSCA
Tsuga canadensis
UNK
unknown
NA
missing value
decay.scale
decay scale
1to5
scale of 1 to 5
1to3
scale of 1 to 3
S.R
sound or rotten
NA
missing value
decay
decay class
1
1-5 scale: solid wood, recently fallen, bark and twigs present / 1-3 scale:
solid
2
1-5 scale: solid wood, significantly weathering, branches present / 1-3 scale:
partially decayed, broken
3
1-5 scale: wood not solid, bark may be sloughing but nail still must be pounded
into wood / 1-3 scale: decomposed into soil
4
wood sloughing and/or friable, nail may be forcibly pushed into
wood
5
wood friable, barely holding shape, nail may be easily pushed into
wood
sound
sound
rotten
rotten
Free text (unrestricted)
.*
NA
missing value
min.diam.cm
minimum diameter of wood included in survey
centimeter
0.1
real
NA
missing value
diam1
diameter of wood where it crosses the transect (linetran). A negative
number measures the hollow within a log in the same transect
centimeter
0.1
real
NA
missing value
diam2
second measurement of diameter taken perpendicular to first
(linetran)
centimeter
0.1
real
NA
missing value
diamavg
elliptical average diameter; if only one diameter recorded, it is in this
column (linetran)
centimeter
0.000000001
real
NA
missing value
length.m
length of down wood piece (plot-based method)
meter
0.001
real
NA
missing value
base.d
diameter at the base of the down wood piece (plot-based
method)
centimeter
0.01
real
NA
missing value
mid.d
diameter at the midpoint of the down wood piece (plot-based
method)
centimeter
0.01
real
NA
missing value
top.d
diameter at the top of the down wood piece (plot-based
method)
centimeter
0.01
real
NA
missing value
dens
density of the wood, based on its species and decay
class
gramsPerCubicCentimeter
0.01
real
NA
missing value
vol.area
calculated volume based on method specified
litersPerSquareMeter
0.000000001
real
NA
missing value
mass
mass, g/m2, calculated from the equation
dens*(1/0.000001))*volume)
kilogramsPerSquareMeter
0.000000001
real
NA
missing value
hollow
whether or not a hollow
N
not a hollow
Y
measurement is of a hollow, so should be a negative value that is subtracted
from the total volume
NA
missing value
notes
notes including tag numbers for individually tracked pieces; in hf041, the
number is the compass angle of the piece, followed by W=windthrown or
S=snapped
notes
NA
missing value
9312
hf324-04-fwd.csv
fine woody debris
hf324-04-fwd.csv
229799
08eaf80157261710e6f2adade3d2c68e
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-04-fwd.csv
year
year of measurement
YYYY
1 year
NA
missing value
project
project name
project name
NA
missing value
archive
Harvard Forest Data Archive number
Harvard Forest Data Archive number
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
type
forest type
AcerBetula
AcerBetula
Pinus
Pinus
Quercus
Quercus
Tsuga
Tsuga
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
lat
latitude
degree
0.00000001
real
NA
missing value
long
longitude
degree
0.00000001
real
NA
missing value
obs.exp
whether observational or experimental measurement
exp
experimental
obs
observational
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
Harvard Forest tract name
NA
missing value
transect
transect number
transect number
NA
missing value
distance.m
distance measured
meter
1
natural
NA
missing value
size.class
size class of fwd
1
0.65-2.4 cm
2
2.5-7.5 cm
1-10cm
all pieces in the 1-10 cm range were lumped together
NA
missing value
count
number of fwd pieces
number
1
whole
NA
missing value
d2q
squared average quadratic mean diameter, m2, by species/species type and
size class (Harmon and Sexton 1996)
squareMeter
0.000001
real
NA
missing value
a
species-specific constant used to calculate volume (Harmon and Sexton
1996)
dimensionless
0.01
real
NA
missing value
dens
species-specific density, g/cm3, used to calculate mass (Harmon and Sexton
1996)
gramsPerCubicCentimeter
0.001
real
NA
missing value
volume
volume, m3/m2, calculated with the equation V=
9.869*count*a*(d2q/(8*distance.m)), where V is volume per unit area, d is the quadratic mean
piece diameter for a size class, and a is the average secant piece along the transect (Harmon
and Sexton 1996)
litersPerSquareMeter
0.000000001
real
NA
missing value
mass
mass, g/m2, calculated from the equation
dens*(1/0.000001))*volume)
gramsPerSquareMeter
0.000000001
real
NA
missing value
1635
hf324-05-snag.csv
standing dead wood
hf324-05-snag.csv
1062053
e612d3eca7e8872833aa420317aaffb9
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-05-snag.csv
year
year of measurement
YYYY
1 year
NA
missing value
project
project nickname
project nickname
NA
missing value
archive
Harvard Forest Data Archive number
Harvard Forest Data Archive number
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
lat
latitude
degree
0.001
real
NA
missing value
long
longitude
degree
0.001
real
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
type
forest type
conifer
conifer
hardwood
hardwood
NA
missing value
obs.exp
whether observational or experimental measurement
exp
experimental
obs
observational
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
PH
Prospect Hill
Pisgah
Pisgah (in New Hampshire)
Simes
Harvard Simes Tract
SimesTrust
land owned by Simes Trust, just south/east of PH gate 8
TS
Tom Swamp
NA
missing value
method
method to calculate volume of the sample
1
calculate volume as frustum of cone inputting baseD; topD;
height.m
1a
calculate volume as frustum of cone with slightly too-small base diameter
inputting dbh, topD, height.m
2
calculate volume as cylinder inputting dbh.cm and height.m
3
calculate volume as cylinder inputting midD and height.m
3a
calculate volume as cylinder inputting baseD and height.m
3b
calculate volume as cylinder inputting baseD and height.m
4
calculate MASS with species-specific allometric equation, then use the INVERSE
of the DENSITY to calculate volume
5
do not calculate volume. Either no wood in plot or transect, or too much
missing information (18 trees total)
NA
missing value
plot.size.m2
area of plot (m2) in which snags and stumps were sampled. This is a total
area per plot for plots in which more than one strip plot was measured
(hf-here)
squareMeter
0.0001
real
NA
missing value
transect
transect identifier for studies in which more than one strip-transect
measured per overall plot (hf-here)
transect identifier for studies in which more than one strip-transect measured
per overall plot (hf-here)
NA
missing value
tran.size.m2
transect area (m2) when more than one strip-transect per plot
(hf-here)
squareMeter
1
natural
NA
missing value
species
tree species
ACPE
Acer pensylvanicum
ACRU
Acer rubrum
ACSA
Acer saccharum
ACSP
Acer spp.
BEAL
Betula alleghaniensis
BELE
Betula lenta
BEPA
Betula papyrifera
BEPO
Betula populifolia
BESP
Betula spp.
CADE
Castanea dentata
CASP
Carya species
CONF
conifer
DECD
deciduous
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
HAVI
Hammamelis virginiana
OSVI
Ostrya virginiana
PIAB
Picea abies
PIGL
Picea glauca
PI
Picea species not specified
PIRE
Pinus resinosa
PIRU
Picea rubens
PISP
Picea spp.
PIST
Pinus strobus
PRSE
Prunus serotina
PRSP
Prunus species not specified
QUAL
Quercus alba
QURU
Quercus rubra
QUSP
Quercus species not specified
TSCA
Tsuga canadensis
UNK
unknown
NA
missing value
decay.scale
decay scale
1to5
1 to 5
NA
missing value
decay
decay class
1
solid wood, recently fallen, bark and twigs present
2
solid wood, significantly weathering, branches present
3
wood not solid, bark may be sloughing but nail still must be pounded into
wood
4
wood sloughing and/or friable, nail may be forcibly pushed into
wood
5
wood friable, barely holding shape, nail may be easily pushed into
wood
NA
missing value
type.1
category of dead wood
hollow
hollow within a snag that is subtracted from the total volume
intact
intact tree
snag
standing dead tree with branches and part of crown missing
stump
cut tree
NA
missing value
treenum
tag number for individually identified pieces or
trees
tag number for individually identified pieces or trees
NA
missing value
dbh.cm
minimum diameter of wood included in survey
centimeter
0.01
real
NA
missing value
base.d
diameter at the base of the down wood piece (plot-based
method)
centimeter
0.000000001
real
NA
missing value
mid.d
diameter at the midpoint of the down wood piece (plot-based
method)
centimeter
0.000000001
real
NA
missing value
top.d
diameter at the top of the down wood piece (plot-based
method)
centimeter
0.000000001
real
NA
missing value
height.m
height of wood piece
meter
0.001
real
NA
missing value
dens
density of the wood, based on its species and decay
class
gramsPerCubicCentimeter
0.01
real
NA
missing value
volume
calculated volume based on method specified
cubicMeter
0.000000001
real
NA
missing value
mass
calculated mass, based on volume and density
gramsPerSquareMeter
0.000000001
real
NA
missing value
notes
notes including tag numbers for individually tracked pieces; in hf041, the
number is the compass angle of the piece, followed by W=windthrown or
S=snapped
notes
NA
missing value
vol.area
volume per unit area (divide by plot.size.m2)
litersPerSquareMeter
0.0000000000000001
real
NA
missing value
biomass
for method 4 only, mass of snag calculated by
allometry
kilogram
0.000000001
real
NA
missing value
5539
hf324-06-soil-carbon.csv
soil carbon
hf324-06-soil-carbon.csv
640213
7e860fd8552e4f2ca7b25281957693ef
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-06-soil-carbon.csv
year
year of measurement
YYYY
1 year
NA
missing value
month
month of measurement
month of measurement
NA
missing value
day
day of measurement
day of measurement
NA
missing value
doy
day of year of measurement
nominalDay
1
natural
NA
missing value
project
project nickname
project nickname
NA
missing value
archive
Harvard Forest Data Archive number; unpublished data not in HF Data
Archive; data from published paper
Harvard Forest Data Archive number; unpublished data not in HF Data Archive;
data from published paper
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
lat
latitude
degree
0.000000001
real
NA
missing value
long
longitude
degree
0.000000001
real
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
type
forest type
hardwood
hardwood
conifer
conifer
NA
missing value
obs.exp
whether observational or experimental measurement
exp
experimental
obs
observational
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
BW
Barre Woods, generally known as Slab City [SC]
PH
Prospect Hill
PISGAH
Pisgah (in New Hampshire)
Simes
Harvard Simes Tract
TS
Tom Swamp
NA
missing value
species
species
ACSA
Acer saccharum
DECD
deciduous (hardwood)
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
PIRE
Pinus resinosa
QURU
Quercus rubra
TSCA
Tsuga canadensis
NA
missing value
sample
sample number
sample number
NA
missing value
sublot.replicate
replicate number
replicate number
NA
missing value
horizon
soil horizon
soil horizon
NA
missing value
depth
depth of sample relative to the top of the mineral soil (mineral) or
horizon thickness (organic)
depth of sample relative to the top of the mineral soil (mineral) or horizon
thickness (organic)
NA
missing value
soil.mass
soil mass
gram
0.001
real
NA
missing value
bulk.density
bulk density
gramsPerCubicCentimeter
0.00000001
real
NA
missing value
rock.volume
volume of rocks in sample
milliliter
0.000000001
real
NA
missing value
per.om
percentage of organic matter
dimensionless
0.001
real
NA
missing value
n
number of samples
number
1
real
NA
missing value
per.c
carbon content (%)
dimensionless
0.001
real
NA
missing value
per.c.se
standard error of the carbon content (%)
dimensionless
0.001
real
NA
missing value
per.n
nitrogen content (%)
dimensionless
0.00001
real
NA
missing value
per.n.se
standard error of the nitrogen content (%)
dimensionless
0.001
real
NA
missing value
c.mass
mass of carbon
kilogramsPerSquareMeter
0.000000001
real
NA
missing value
c.mass.rocks
mass of carbon corrected for the volume of rocks in
sample
kilogramsPerSquareMeter
0.000000001
real
NA
missing value
use.not
whether or not to use data for synthesis
0
do not use data
1
use data
NA
missing value
notes
notes
notes
NA
missing value
2928
hf324-07-root-biomass.csv
fine root biomass
hf324-07-root-biomass.csv
881976
c57ec5bc433aa7bd35711b0e8e7ad119
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-07-root-biomass.csv
year
year of measurement
YYYY
1 year
NA
missing value
month
month of measurement
month of measurement
NA
missing value
day
day of measurement
day of measurement
NA
missing value
doy
day of year of measurement
nominalDay
1
natural
NA
missing value
project
project nickname
project nickname
NA
missing value
archive
Harvard Forest Data Archive Number; unpublished data that are not in the
Harvard Forest archive; data from published papers
Harvard Forest Data Archive Number; unpublished data that are not in the
Harvard Forest archive; data from published papers
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
lat
latitude
degree
0.000000001
real
NA
missing value
long
longitude
degree
0.000000001
real
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
type
forest type
conifer
conifer
hardwood
hardwood
NA
missing value
obs.exp
whether observational or experimental measurement
exp
experimental
obs
observational
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
BW
Barre Woods, generally known as Slab City [SC]
PH
Prospect Hill
PISGAH
Pisgah (in New Hampshire)
Simes
Harvard Simes Tract
TS
Tom Swamp
NA
missing value
species
species
ACSA
Acer saccharum
DECD
deciduous (hardwood)
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
PIRE
Pinus resinosa
QURU
Quercus rubra
TSCA
Tsuga canadensis
NA
missing value
method
inventory method for root biomass
inventory method for root biomass
NA
missing value
sample
sample number
sample number
NA
missing value
live.dead
root state
dead
dead
live
live
NA
missing value
fine.coarse.herb
root size
coarse
great than 2mm diameter
fine
less than 2mm diameter
herbaceous
herbaceous root
NA
missing value
horizon
soil horizon
mineral
mineral
organic
organic
organic+mineral
organic and mineral
NA
missing value
depth
depth of sample relative to the top of the mineral soil (mineral) or
horizon thickness (organic)
depth of sample relative to the top of the mineral soil (mineral) or horizon
thickness (organic)
NA
missing value
rock.volume
volume of rocks in sample
milliliter
0.000000001
real
NA
missing value
n
number of samples
number
1
whole
NA
missing value
wt.g
root mass
gram
0.000000001
real
NA
missing value
wt.gm2
root mass
gramsPerSquareMeter
0.000000001
real
NA
missing value
wt.gm2.se
standard error of the root mass
dimensionless
0.000000001
real
NA
missing value
gcm2
root C mass
gramsPerSquareMeter
0.000000001
real
NA
missing value
gcm2.rock
root C mass (gC/m2) corrected for volume of rocks in
sample
kilogramsPerSquareMeter
0.000000001
real
NA
missing value
use.not
whether or not to use data for synthesis
0
do not use
1
use
NA
missing value
notes
notes
notes
NA
missing value
3146
hf324-08-root-exudates.csv
root exudates
hf324-08-root-exudates.csv
6615
898867b6f2b099f5f308610f4a311c1b
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-08-root-exudates.csv
date
date of measurement
YYYY-MM-DD
1 day
NA
missing value
year
year of measurement
YYYY
1 year
NA
missing value
month
month of measurement
month of measurement
NA
missing value
day
day of measurement
day of measurement
NA
missing value
doy
day of year of measurement
nominalDay
1
natural
NA
missing value
project
project nickname
project nickname
NA
missing value
archive
Harvard Forest Data Archive number; other published
data
Harvard Forest Data Archive number; other published data
NA
missing value
contact
contact person for dataset
contact person for dataset
NA
missing value
lat
latitude
degree
0.00000001
real
NA
missing value
long
longitude
degree
0.00000001
real
NA
missing value
plot
plot identifier
plot identifier
NA
missing value
site
specific site of plot
specific site of plot
NA
missing value
type
forest type
conifer
conifer
hardwood
hardwood
NA
missing value
obs.exp
whether observational or experimental measurement
exp
experimental
obs
observational
NA
missing value
treatment
if experimental, treatment type
if experimental, treatment type
NA
missing value
treat.year
if experimental, treatment year
YYYY
1 year
NA
missing value
tract
Harvard Forest tract name
PH
Prospect Hill
PISGAH
Pisgah (in New Hampshire)
NA
missing value
species
species
ACSA
Acer saccharum
FAGR
Fagus grandifolia
FRAM
Fraxinus americana
QURU
Quercus rubra
TSCA
Tsuga canadensis
NA
missing value
rock.volume
volume of rocks in sample
milliliter
0.0001
real
NA
missing value
n
number of samples
number
1
natural
NA
missing value
gcm2day
mass of exudates (gC/m2/day)
gramPerMeterSquaredPerDay
0.000000001
real
NA
missing value
se
standard error of the mass of exudates (gC/m2/day)
dimensionless
0.000000001
real
NA
missing value
gcm2day.rock
mass of exudates corrected for the rock content in the samples
(gC/m2/day)
gramPerMeterSquaredPerDay
0.000000001
real
NA
missing value
use.not
whether or not to use data for synthesis
0
do not use data
1
use data
NA
missing value
notes
notes
notes
NA
missing value
26
hf324-09-tree-code-files.zip
tree workflow, R scripts and files
hf324-09-tree-code-files.zip
2055548
f6292f3a0a14637e46beb3c616c09342
zip
csv, Microsoft Excel, R script, text
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-09-tree-code-files.zip
document, script, table
hf324-10-litter-dead-wood-processing.zip
litterfall and dead wood processing files and R scripts
hf324-10-litter-dead-wood-processing.zip
7904
64229974dc938bfdcc4048a5ce8e44f0
zip
csv, text, R script
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-10-litter-dead-wood-processing.zip
document, script
hf324-11-matlab-giasson-files.zip
MATLAB code and input files
hf324-11-matlab-giasson-files.zip
94416813
81984604d984e5e8ddd30a2587c8c157
zip
csv, Matlab script, Microsoft Excel, text, R script
https://harvardforest.fas.harvard.edu/data/p32/hf324/hf324-11-matlab-giasson-files.zip
document, script, table
atmosphere
invasive
plot
soil
long-term measurement
https://harvardforest.fas.harvard.edu/major-research-topics/major-research-topics/forest-atmosphere-exchange
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf000
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf001
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf002
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf004
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf005
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf006
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf007
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf008
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf015
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf018
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf031
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf032
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf036
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf039
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf045
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf053
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf054
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf068
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf069
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf101
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf103
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf125
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf126
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf130
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf143
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf148
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf149
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf150
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf151
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf160
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf161
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf162
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf166
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf175
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf180
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf207
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf223
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf227
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf233
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf240
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf256
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf257
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf271
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf278
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf293