Decomposcape (wood): decomposition data for Schima superba logs (2011-2014)

Usage Rights

This data is Free within projects.

Dataset Abstract

The Ecoscape approach was set up to investigate the influence of biodiversity on litter decomposition (leaves and wood). In order to separate the effects of microclimate and topography from putative effects of (plant) biodiversity, leaf litter samples were set out in a total of 134 plots across Site A and Site B, respectively. Topographic measures were recorded directly in the field. The present dataset contains the data on the decomposition of Schima superba wood logs across the Ecoscape set up. In addition to variations in biodiversity, topographic and microclimatic variations, litter bags were used as an additional treatment factor. Fine meshed litter bags (25µm) prevented meso- and macroinvertebrates to access the wood samples, whereas the coarse mesh treatment allowed for the access of invertebrates. The experiment has been set up in 2011 and logs were sampled in two cohorts, after two and four years of in-situ wood decomposition.

Dataset Design

The samples positioned in a randomized square with four replicates per sample position. There were two levels of sample treatment: 2 mesh-sizes (i.e. fine vs. coarse) and two sampling periods (i.e. 2012 and 2014). Every sampling period (2012 and 2014), one fine and one coarse meshed sample was collected from the respective position and taken to the lab. Dry weight was determined after drying the samples in the drying ovenm at 60°C until a stable mass was reached. For further details see the manuscript entitled "Influence of Biodiversity, topography and microclimate on the effect of invertebrate exclusion on coarse wood decomposition: a case study from subtropical China" by Eichenberg et al (2015, submitted to Journal of Plant Ecology, Special issue on Biodiversity research in China)

Spatial Extent

Experimental sites A and B

Temporal Extent

The first samples were set out on the 28.11.2011. The last sample was collected on the 30.08.2014. For further detailed information on the deposition or retention date of specific samples, please contact kpietsch@uni-leipzig.de

Taxonomic Extent

Schima superba

Data Analysis

We determine decomposition rates (k-rates) for every sample based on the relative mass los over time. The k-rates are calculated from an exponential decay function (Odum 1963) and converted into mass los per year.

Data columns available in the raw data part of this dataset

Plot_Site
Helper to identify where the respective sample has been laid out. Combines the information on Site and Plot to avoid ambiguousnes, as plot names may be repeated between sites (e.g. E23 may be on both, Site A and Site B).
Data group: Helper
Keywords: sample position
Values
A_E31
A_C32
A_E33
A_E24
A_E23
Sample_ID
Unique identifier for each sample laid out in the field
Data group: Identifier
Keywords: sample identity
Values
T10F117
T10F116
T10F119
T10F118
T10F120
Life_tree_number
Refers to the tree individual from which the respective sample has been cut. This factor can be used e.g. as a random effect in mixed effects models to account for across-individual differences in non-measured properties such as e.g. nutrient contents or secondary compounds
Data group: Helper
Values
12
1
13
10
11
Plot
Plot in which the respective sample has been laid out
Data group: Plot name Main experiment (letter, number code)
Values
E31
D29
E23
E24
C32
Site
Site of the plot on which the sample has been laid out.
Data group: Experimental Site
Values
B
A
Plot_Treatment
This cloumn gives information on the psotion of the sample as well as on the litter bag treatment. c: coarse mesh (7mm), f: fine mesh (0.25mm)
Data group: Helper
Values
Site-A-E23f
Site-A-C32f
Site-A-E24c
Site-A-E23c
Site-A-C32c
Mesh_fine
Giving information on wheter the sample has been stored in a fine mesh bag (0.255mm) or in a coarse mesh bag (7mm). Fine: 1, coarse: 0
Data group: Treatment
Keywords: litterbag, control treatment
Values
0
1
d_mean
Mean diameter of the respective sample. Has been calculated as the mean of two diameter measures at both ends of the sample.
Unit: cm²
Data group: Sample diameter
Keywords: sample size, diameter
Values
10.16666667
10
10.05
10.01666667
10.06666667
l_mean
Mean length of the sample. Calculated as the mean of two measurements with the sample turned by 180°
Unit: cm
Data group: Sample size
Keywords: sample size, length
Values
14.355
24.45
24.3
24.15
24.25
Volume
Volume of the respective sample, calulated as a cylinder based on the mean diameter and mean length
Unit: cm³
Data group: Volume of an object
Keywords: sample volume, volume
Values
241.6866498
169.8674856
256.9325372
257.5896536
254.6575005
dw_depos
Dry weight of the sample at the date of deposition in the field. This value is calculated from the fresh weigth of the sample corrected by the ratio of dry to fresh weight from separate samples takes from the respective individual given in life tree number. These separate samples were weighted freshly and then dried in the oven at 60° until stable weight. The, the fresh weight to dry weigth ratio was calculated for these samples.
Unit: g
Data group: Litter Biomass
Keywords: litter biomass
Values
1004.168474
1003.814224
1011.20372
1010.178164
1003.022925
dw_retent
Dry weight of the sample at time of retention. Samples were colelcted fromthe field and then dired in the oven at 60° until reaching stable weight.
Unit: g
Data group: Litter Biomass
Keywords: litter biomass
Values
1021.63701
1004.112742
1048.294452
1061.825821
1025.847043
Termites
Indicates whether termites or termite feeding traces were found on the sample.
Data group: Organisms found on or in specimen
Keywords: termites, decomposition
Values
1
0
Fungi
Indicates wheter fungi (in terms of fruitbodies or visible mycelia) were present o the respective sample by visual inspection.
Data group: Organisms found on or in specimen
Keywords: fungi, wood decomposition, decomposition
Values
0
1
Duration_days
Time )in days) how long the respective sample was laid out in the field for in-situ decomposition
Unit: d
Data group: Exposure time
Keywords: duration
Values
297
299
300
301
298
Delta_m
Massloss of the respective sample during the time of in-situ decomposition.
Unit: g
Data group: Litter Biomass
Keywords: decomposition, wood decomposition, massloss
Values
100.3709909
102.4621287
0.227610892
100.8955045
100.4107953
Init_m_perc
Initial mass of the respective sample. Set to 100% for each sample
Unit: %
Data group: Litter Biomass
Keywords: litter biomass, decomposition, wood decomposition
Values
100
End_m_perc
Percentage of dry mass at the date of retention.
Unit: %
Data group: Litter Biomass
Keywords: massloss, decomposition, wood decomposition
Values
20.52
16.76
19.6
19.1
19.99
Massloss_perc
Massloss of the sample during the process of decomposition.
Unit: %
Data group: Litter Biomass
Keywords: decomposition, massloss, wood decomposition
Values
0.24
0.59
0.45
0.03
0.5
Harvest_year
Year in which the respective sample was retained from the field
Data group: Helper
Keywords: duration, year
Values
2012
2014
k_rate
Decomposition rate of the respective sample, based on the relative massloss of each sample. Has been calculated based on the assumption of exponential decay as described in Olson (1963)
Data group: Decomposition
Values
0.0671748241531007
0.0174955708680797
0.0710292404577157
0.0494524418001781
0.076803229098782
Inclination
Inclination of the respective sample position in °
Unit: °
Data group: Inclination
Keywords: inclination, slope inclination
Values
10
1
12
11
13
* Leppert (ehem. Seidelmann), K. also contributed to this column.
Eastness
Eastness in °radians calculated from the aspect information. Wastness is calcualted as sin(Aspect*PI/180).
Unit: °rad
Data group: Aspect
Keywords: slope aspect; eastness
Values
0.087155743
0
0.017452406
-0.087155743
-0.017452406
Northness
Northness in °radians calculated from the aspect information. Wastness is calcualted as cos(Aspect*PI/180).
Unit: °rad
Data group: Aspect
Keywords: slope aspect; northness
Values
0.052335956
0.087155743
-0.017452406
-0.052335956
-0.087155743
* Leppert (ehem. Seidelmann), K. also contributed to this column.
Tree_Richness
Number of tree species richness in the respective community.
Data group: Taxonomic biodiversity
Keywords: species richness
Values
1
0
2
16
24
Tree_composition
Composition of tree species in the respective community.
Data group: Taxonomic biodiversity
Keywords: Composition
Values
A. altissima_C. biondii_E. glabripetalus_E. japonicus_I. polycarpa_M. grijsii_M. flexuosa_Ph. bournei
A. altissima
A. altissima_M. flexuosa
A. altissima_I. polycarpa_M. grijsii_M. flexuosa
A. altissima_A. fortunei_B. luminifera_C. fargesii_C. biondii_E. chinensis_E. glabripetalus_E. japonicus_I. polycarpa_M. grijsii_M. leptophylla_M. thunbergii_M. yuyuanensis_M. flexuosa_Ph. bournei_Q. phillyreoides
Planted
Indicating whether the respective plot in which the sample was laid out has ben planted with trees or not.
Data group: Helper
Keywords: treatment
Values
1
0