NILEx tracer (wood): wood mass loss data including initial sample characterization

Usage Rights

This data is Private.

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Dataset Abstract

These data were complied related to the question: Is there evidence for lateral N-transport from leaf litter to dead wood? Wood slices of different species (Pinus massonina, Schima superba, Quercus serrata) placed at different divers 15N labeled leaf litter mixture layers (of tree differenzt species: Schima superba, Quercus acutissima, Sapindus mukorossi). Two different decomposition periods were observed. Afterwards the decomposed wood slices were analysed via mass spectrometry regarding to their total N content and their 15N content. Additionally we observed the mass loss of wood samples during the decomposition process.

Dataset Design

Mass loss of wood samples was calculated based on initial sample data for two different periods of decomposition (3 months and 6 months) on leaf litter layer.

Spatial Extent

Subtropical China, near Site A, Xingangshan, Jiangxi

Published

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Temporal Extent

Wood slices were placed at 16./17.04.2012 in the field and were harvested at 16.07.2012 (after 3 months) and 07.10.2012 (after 6 months). Dry weight was determined in right after harvest. Afterwards we calculated wood sample mass loss based on initial data.

Taxonomic Extent

Wood species: Pinus massoniana, Quercus serrata, Schima superba

Data Analysis

Parameter of interest was mass loss of wood samples. Therefor we calculated the difference of initial dry weight and dry weight of sample after decomposition period. This value represents the mass loss of wood samples. Afterwards we converted these values into percentage data.

Data columns available in the raw data part of this dataset

meas.date
Date of the measurement
Data group: Helper
Values
2012-04-06
2012-04-07
2012-04-05
2012-04-03
2012-04-04
* measurement date of initial freshweight and volum measures date also contributed to this column.
species
Wood species
Data group: Scientific plant species name
Keywords: TracerNILEx, coarse woody debris, wood decomposition
Values
Schima superba
Pinus massoniana
Quercus serrata
* tree species of sampel category also contributed to this column.
tree
Allows unabiguous identification of the tree from which a respective sample was cut. Can be used e.g. as random factor in an analysis.
Data group: Helper
Values
Ind_10
Ind_4
Ind_1
Ind_2
Ind_3
* tree individual of which the sample has arisen (tree number 1-4 for Schima superba, tree number 5-6 for Pinus massoniana and tree number 7-10 for Quercus serrata) category also contributed to this column.
sample
Consecutive Number of sample in the TracerNILEx (Wood).
Data group: Identifier
Values
10
11
1
12
13
* individual sample from a respective tree species, consecutive within species category also contributed to this column.
freshweight
Fresh weight (in g) of the respective sample
Unit: g
Data group: Sample fresh weight
Keywords: fresh weight, wood decomposition, TracerNILEx
Values
100.41
100.24
100.44
100.94
101.28
* freshweight of undecomposed sample number also contributed to this column.
initial.DW
Initial dry weight of undecomposed wood samples based on dry weight and fresh weight information of 28 wood samples which were not exposed to decomposition. For each tree species and each tree individual we determined a dry weight/fresh weight ratio. Afterwards we multiply the measured fresh weight of decomposed wood samples by the determined ratio value. So we get the calculated initial dry weight of wood samples which were exposed to decomposition process.
Unit: g
Data group: Sample dry weight
Keywords: dry weight
Values
100.59322127617062
100.29245849611225
101.26916544708986
100.70541265564414
100.89242363550605
diam
diameter of sample
Unit: cm
Data group: Woody debris dimensions
Values
10.25
10.1
10
10.15
10.2
* diameter of sample number also contributed to this column.
height1
the height of each sample was measured in the 4 quarters of each sample. Height 1 refers to first height measurement
Unit: mm
Data group: Woody debris dimensions
Keywords: coarse woody debris
Values
20.59
20.54
20.74
19.94
20.37
* the height of each sample was measured in the 4 quarters of each sample. Height 1 refers to first height measurement number also contributed to this column.
height2
the height of each sample was measured in the 4 quarters of each sample. Height 2 refers to second height measurement
Unit: mm
Data group: Woody debris dimensions
Values
21.21
19.51
20.76
20.48
20.46
* Height 2 refers to second height measurement number also contributed to this column.
height3
the height of each sample was measured in the 4 quarters of each sample. Height 3 refers to third height measurement
Unit: mm
Data group: Woody debris dimensions
Values
21.08
20.99
17.59
20.79
20.76
* Height 3 refers to third height measurement number also contributed to this column.
height4
the height of each sample was measured in the 4 quarters of each sample. Height 4 refers to fourth height measurement
Unit: mm
Data group: Woody debris dimensions
Values
21.2
21.61
21.66
21.5
19.99
* Height 4 refers to fourth height measurement number also contributed to this column.
bark_thick_top1
the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the top of the sample.
Unit: mm
Data group: Bark thickness
Keywords: bark thickness
Values
1.36
1.41
1.37
1.45
1.43
* the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the top of the sample number also contributed to this column.
bark_thick_top2
the bark thickness was measured twice at the top and twice at the bottom on opposite sides of the sample, this is the second measurement on the top of the sample
Unit: mm
Data group: Bark thickness
Keywords: bark thickness
Values
0.76
1.02
1.13
1.04
1.12
* the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the top of the sample number also contributed to this column.
heartwood_thick base1
the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the base of the sample
Unit: mm
Data group: Wood density
Keywords: heartwood, wood density
Values
12.86
13.65
13.24
13
12.45
* the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the base of the sample number also contributed to this column.
heartwood_thick base2
the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the secondt measurement on the base of the sample
Unit: mm
Data group: Wood density
Keywords: heartwood, wood density
Values
13.45
13.38
13.84
13.76
14.11
* the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the base of the sample number also contributed to this column.
bark_thick_base1
the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the base of the sample
Unit: mm
Data group: Bark thickness
Values
0.54
1.06
1.28
1.21
1.23
* the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the base of the sample number also contributed to this column.
bark_thick_base2
the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the base of the sample
Unit: mm
Data group: Bark thickness
Values
0.96
0.77
1
0.95
0.71
* the bark thickness was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the base of the sample number also contributed to this column.
heartwood_thick top1
the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the top of the sample
Unit: mm
Data group: Wood density
Values
13.07
12.84
12.03
13.04
12.24
* the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the first measurement on the top of the sample number also contributed to this column.
heartwood_thick top2
the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the top of the sample.
Unit: mm
Data group: Wood density
Values
14.21
13.96
14.05
14.87
14.5
* the heartwood thickness (if visible) was measured twice at the top and twitce at the bottom on opposite sides of the sample, this is the second measurement on the top of the sample number also contributed to this column.
mesh
Mesh size (categorical. c: coarse mesh (7mm mesh width); f: fine mesh (0.25mm mesh width).
Data group: Treatment
Keywords: mesh size
Values
c
f
* mesh treatment. category also contributed to this column.
green_nr
individual identifyer of samples in the field
Data group: Identifier
Values
NILEX_Wood_2556
NILEX_Wood_2551
NILEX_Wood_2554
NILEX_Wood_2555
NILEX_Wood_2553
* individual identifyer of samples in the field category also contributed to this column.
deposition_date
Date of sample deposition in the field
Data group: time of decomposition
Values
2012-04-16
2012-04-17
* date of sample deposition in the field date also contributed to this column.
Retention.Date
date of sample retention in the field
Data group: time of decomposition
Values
2012-07-16
2012-10-07
decomp_days
number of days that the wood sample was in the field
Data group: Exposure time
Values
90
91
173
174
* number of days that the wood was in the field number also contributed to this column.
harvest
sample period when the sample was taken out of testing field
Data group: time of decomposition
Values
time_1
time_2
* sample period when the sample was taken out of testing field category also contributed to this column.
FW.sample
freshweight of decomposed sample at the time of retention. This was only measured for samples fromt the second sampling period as no meaningful massloss was expected for samples from the first period.
Unit: g
Data group: Sample fresh weight
Values
100.35
103.05
104.39
102.08
104.48
date.DW
date of dryweight measuremtns of samples after hatvest
Data group: time of decomposition
Values
2012-10-17
2012-10-15
2012-10-30
2012-10-31
DW.sample
dry weight of decomposed sample at the time of harvest
Unit: g
Data group: Sample dry weight
Values
101.27
100.67
101.13
100.46
101.16
block-plot
localization in the field via block number and plot number, first number = block, after hyphen = plot within block
Data group: Tracer NILEx Plot
Values
1-2
1-14
1-20
1-15
1-11
* localization in the field via block number and plot number, first number = block, after hyphen = plot within block category also contributed to this column.
nights.stored
Wether the samples were stored over night (in the fridge). 0: samples were analyszed at the day of retentrion from the field. 1: samples were emasured on the next day.
Data group: Sample quality
Values
0
1
* number of nights that the samples were stored in plastic zip lock bags after retention from the field and before drying number also contributed to this column.
Termites
Presence/absence (1/0) Information on termties in the sample
Data group: Organisms found on or in specimen
Values
1
0
bag.holes
denotes if the litter bag had holes at the time of sample retention; 0: no holes; 1: holes present
Data group: Sample quality
Values
0
1
* denotes if the litter bag had holes at the timeof sampel retention category also contributed to this column.
comment
comment to the data row
Data group: Helper
Values
boreholes
boreholes, was supposed to be 1. harvest
borehole
Borehole
* comment to the data row text also contributed to this column.
comment2
additional comments to the data row
Data group: Helper
Values
1-25 one piece
25-43 = one piece
1-24 = one piece
20% bark lost
27-58 one piece
* additional comment to the data row text also contributed to this column.
abs.mass.loss
absolute mass loss of wood sample, difference between calculated initial dry weight and measured dry weight after decomposition period of each sample.
Unit: g
Data group: Decomposition
Values
0.013517343950844918
0.2516266628568715
-0.09639455446667
0.2557368836791909
0.06019396090459139
* absolute mass loss of wood sample, difference between calculated initial dry weight and measured dry weight after decomposition period of each sample. number also contributed to this column.
rel.mass.loss
relative mass loss of wood sample
Unit: %
Data group: Decomposition
Keywords: wood decomposition, massloss
Values
0.14421102345851886
0.4519458396466551
0.031780451735359164
0.600231152480102
-0.13488621776876067
* relative mass loss of wood sample number also contributed to this column.