Decomposcape (leaf): remaining litter mass for all timesteps, Main Experiment, Site A

Usage Rights

This data is Free within projects.

Usage rights for Sp5; Acknowledgements: Michael Leppert, Manuel Hiß, Mr. Qi, Chinese helpers, Katherina Pietsch, Chen Lin

Dataset Abstract

For the “decomposcape” approach, a total of 4131 litter bags were filled with single-species litter of Osmanthus fragrans, Pinus massoniana and Schima superba, respectively. These bags have been fixed on the soil surface across both field sites. The positioning of the litter bags differ in topographic features, and in the diversity of the newly planted tree species. By studying the litter decomposition dynamics over time, we will thus quantify the effects of topography and micro-relief on decomposition dynamics. The study is part of the "Ecoscape approach". This dataset contains the values of the remaining litter mass at all three timesteps for the plots at Site A.

Dataset Design

Polyester bags (15 x 15 cm, 1 x 1.5 mm mesh size, 5 g litter) were used to determine the mass loss of the leaves of three local tree species: Schima superba (collected in autumn 2010 in a secondary forest near the experimental sites), Pinus massoniana and Osmanthus fragrans (both collected in a monoculture plantation near the experimental sites). The leaves were dried at 65°C for 24 hours.
We exposed the litterbags at three positions (suplots) within the 35 different tree diversity plots and their corresponding replicates at both sites of the “Main Experiment”. Per subplot, three litterbags of each species were randomized and pinned directly onto the soil after removing the herb layer. Thus, a total of 3780 litterbags were deposited on 420 subplots across two sites. Additionally, a 25 cm wide frame of water permeable plastic fabric was pinned around the litterbag square to avoid weeds from growing into the subplots. After two, six and eleven months, one bag per litter species was sampled per subplot to determine the remaining dry mass of the leaves after cleaning.
For the topographic components we measured the inclination, aspect and soil-shape on each subplot. To calculate the microclimatic parameters, air humidity and temperature were measured with onset®,HOBO® Pro v2 data logger (Onset Computer Corporation, Bourne, USA) every 30 min on one subplot per diversity level. Additionally, soil moisture measurements were conducted once a month with a ThetaProbe ML2x FD-Sonde and Infield7 handheld meter (UMS GmbH Munich, Germany).

Spatial Extent

Main Experiment, Site A and B
29°08'-29°11'N
117°90'-117°93'E

Temporal Extent

October 2011-September 2012

Taxonomic Extent

Leaf litter of Schima superba, Pinus massoniana and Osmanthus fragrans

Measurement Circumstances

hot, sunny, mosquitos

Data Analysis

After two, six and eleven months, one bag per litter species was sampled per subplot to determine the remaining dry mass of the leaves after cleaning. Data can be used to calculate the decomposition rate constant k for each plot.

Data columns available in the raw data part of this dataset

bag_ID
Litter bag identification number
Data group: Decomposcape litter bag ID
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
Dec_Osm_A_T0_E23_S2
Dec_Osm_A_T0_C32_S3
Dec_Osm_A_T0_C32_S1
Dec_Osm_A_T0_E23_S1
Dec_Osm_A_T0_C32_S2
site
Experimental site of main experiment
Data group: Experimental Site
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
A
timestep
Sampling timestep, exact exposure times of the litterbags can be obtained from the column "days".
Data group: Time series
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
T0
T1
T2
T3
days
Time in days, how long the litterbag was submitted to decomposition
Data group: Exposure time
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
305
179
60
0
PLOT_NO
name of each plot, coded with letters and numbers in Site A
Data group: Plot name Main experiment (letter, number code)
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
C32
E31
E23
E33
E24
subplot
Subplot within VIP or VIPrep plot.
Data group: Helper
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
S2
S3
S1
dec_subplot_ID
subplot ID within VIP or VIPrep plot. Can be used to link this data to other Samplesets concerning Decomposcape, where subplot_ID is also available to describe the litterbag location. This e.g. refers to the dataset "Decomposcape: plot topography data" Site A and B, respectively.
Data group: Decomposcape sublot ID
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
Dec_A_C32_S1
Dec_A_C32_S3
Dec_A_E23_S2
Dec_A_C32_S2
Dec_A_E23_S1
weight_T0
Litter mass at beginning (T0) of the decomposition experiment.
Unit: g
Data group: Decomposition
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
0.95
4.91
4.56
4.9
4.7
weight_TX
Remaining litter mass at the respective timestep (c.f. columns "timestep" or "days")
Unit: g
Data group: Decomposition
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
1.75407
1.28904
1.8696
0.63424
1.49641
weight_perc
Percent of the remaining litter mass at the respectibe timestep.
Unit: %
Data group: Decomposition
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
29.690674603174607
25.98870967741935
102.60861723446892
12.659481037924152
100
species
Plant species from which the respective leaf litter was collected
Data group: Scientific plant species name
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
Osmanthus fragrans
Pinus massoniana
Schima superba
datum
Datum of sampling of the respective sample and timestep
Data group: Date time information
Keywords: litter decomposition, Decomposcape, Ecoscape
Values
2011-12-30
2012-04-27
2011-10-30
2012-10-01