NILEx tracer (leaf): remaining litter mass and tracer 15N and Li concentrations/contents in leaf litter

Usage Rights

This data is Private.

Usage rights: dataset is available on request for all Tracer NILEx members;

Acknowledgement of non members: Manuel Hiß, Ulrike Erhardt, Mr. Qi and other Chinese helpers (fieldwork), Ulrike Erhardt, Benjamin Plaga, Wolfhang H. Müller, Erika Fischer and German helpers (labwork)

Dataset Abstract

Leaf decomposition plays an important role in ecosystem biogeochemistry. Nutrients are released from decomposing litter by leaching of soluble substances and the break-down by animals, microbes and fungi, and will thus become again available for uptake by plants. These decomposition processes might be influenced by the composition and diversity of litter species. To gain a deeper understanding about the relationships between litter diversity, nutrient cycling and uptake by plants, we established a leaf decomposition experiment at the forest rim of Site A in a small natural forest.

Dataset Design

Unlabelled, and 15N and Li labelled leaves of the native tree species Sapindus saponaria, Quercus actusissima and Schima superba were used to create 1-, 2- and 3-species mixtures with one species labelled each per mixture. In total, 12 plots with all possible mixtures were replicated three times arranged in three blocks. Leaves of the respective species mixtures were placed in mesocosms together with one phytometer plant (Carex spec.). Over a timeperiode of six month, leaves and phytometer plants of each mixture were recovered in four timesteps (after 12, 37, 101 an 171 days). All leaves were cleaned, separated into species, dried at 40°C, weighted and analyzed for their Li and 15N content. 15N analysis were also carried out with the leaves and roots of the respective phytometer plant.

Spatial Extent

Small forest at the rim of site A

Temporal Extent

April 2011 - October 2011

Taxonomic Extent

The 15N an Li labelled and unlabelled leaves of tree native tree species were used: Sapindus saponaria, Schima superba, Quercus acutissima. The trees were transplanted to a field near site B from a nursery in Dexing in spring 2011. The senescend leaves were colledcted in autumn 2011.

Measurement Circumstances

hot, many moscitos

Data Analysis

Tracer 15N and Li concentrations in leaves

Data columns available in the raw data part of this dataset

timestep
sampling timestep (T0 = 0 days, T1 =12 days, T2 =37 days, T3 =101 days, T4 =171 days)
Data group: sampling timestep
Keywords: Tracer Nilex
Values
T4
T2
T0
T1
T3
days
time of decomposition
Unit: days
Data group: time of decomposition
Keywords: Tracer Nilex
Values
171
37
0
12
101
block
Number of the block of the TracerNILEx; Datagroup description: Tracer New Integrated Litter Experiment
Data group: Tracer NILEx Block
Keywords: Tracer Nilex
Values
B2
B1
B3
plot
Numer of the plot within the TracerNILEx. Note: only becomes unique in combination with the information on Block.
Data group: Tracer NILEx Plot
Keywords: Tracer Nilex
Values
P07
P03
P05
P06
P04
div
litter species diversity
Unit: litter species
Data group: Tracer NILEx Diversity
Keywords: Tracer Nilex
Values
3
2
1
composition
litter species composition
Data group: Litter species composition
Keywords: Tracer Nilex
Values
Sap
Querc_Sap
Querc
Querc_Schi
Querc_Sap_Schi
labelled_species
labelled litter species in mixture; Datagroup description: Information on the species found in the respective litter mixture
Data group: Litter species
Keywords: Tracer Nilex
Values
Querc
Schi
Sap
sample_species
sample litter species; Datagroup description: Information on the species found in the respective litter mixture
Data group: Litter species
Keywords: Tracer Nilex
Values
Schi
Querc
Sap
status
labelling status (N = unlabelled, L = labelled leaf litter); Datagroup description: Information on the species found in the respective litter mixture
Data group: Litter species
Keywords: Tracer Nilex
Values
N
L
weight_g
remaining biomass at the respective timestep
Unit: g
Data group: remaining litter mass
Keywords: Tracer Nilex
Values
0
0.03
0.04
0.02
0.01
* Plaga, B., Wolfgang H. Müller, Ulrike Erhardt also contributed to this column.
weight_perc
remaining biomass at the respective timestep in percent
Unit: %
Data group: remaining litter mass
Keywords: Tracer Nilex
Values
0.8
102.43
0.5
0
100
amt_perc_ N
litter nitrogen content
Unit: %
Data group: litter nutrient concentration
Keywords: Tracer Nilex
Values
0.0389633
1.3653841
0.0355265
0
1.2815902
leaf_delta_15N
leaf litter delta 15N values
Unit: ‰
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0
-0.16
0.49
0.46
-0.04
atom_perc_15N
leaf litter 15N atom% values
Unit: atom%
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0.3659
0.3665
0.3662
0.3663
0
15N_excess_µmol_15N_per_gDW
15N_excess_µmol_15N_per_gDW
Unit: µmol_15N_per_gDW
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0.0046
0.002
0
0.0018
0.0084
total_15N_excess_per_sample
total_15N_excess_per_sample
Unit: µmol_15N_per_sample
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0.0029
0.0007
0
0.0045
0.0012
Li_excess_µmol_Li_per_g_DW
Li_excess_µmol_Li_per_g_DW
Unit: µmol_Li_per_g_DW
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0
0.049
0.046
0.058
0.03
Li_excess_µmol_Li_sample_total
Li_excess_µmol_Li_sample_total
Unit: µmol_Li_per_g_sample
Data group: Tracer concentration
Keywords: Tracer Nilex
Values
0.028
0.044
0
0.047
0.056