uid=HFR,o=lter,dc=ecoinformatics,dc=org
all
public
read
doi:10.6073/pasta/dbb88d6de83bf8e2335dd36e42b315d6
Long-Term Decomposition Plots at Harvard Forest 1990-2009
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 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.
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