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Title:
NILEx tracer (leaf): remaining litter mass and tracer 15N and Li concentrations/contents in leaf litter
Access rights:
Private
Usage rights:
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)
Published:
No information available
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.
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 cirumstances:
hot, many moscitos
Data analysis:
Tracer 15N and Li concentrations in leaves

Filter:
Dataset column

Name:
timestep
Definition:
sampling timestep (T0 = 0 days, T1 =12 days, T2 =37 days, T3 =101 days, T4 =171 days)
Unit:
No information available
Datagroup:
sampling timestep
Keywords:
Tracer Nilex
Values:
T0
T3
T4
T1
T2
Contributors:
No information available

Dataset column

Name:
days
Definition:
time of decomposition
Unit:
days
Datagroup:
time of decomposition
Keywords:
Tracer Nilex
Values:
101
0
37
171
12
Contributors:
No information available

Dataset column

Name:
block
Definition:
Number of the block of the TracerNILEx; Datagroup description: Tracer New Integrated Litter Experiment
Unit:
No information available
Datagroup:
Tracer NILEx Block
Keywords:
Tracer Nilex
Values:
B3
B2
B1
Contributors:
No information available

Dataset column

Name:
plot
Definition:
Numer of the plot within the TracerNILEx. Note: only becomes unique in combination with the information on Block.
Unit:
No information available
Datagroup:
Tracer NILEx Plot
Keywords:
Tracer Nilex
Values:
P04
P06
P07
P05
P03
Contributors:
No information available

Dataset column

Name:
div
Definition:
litter species diversity
Unit:
litter species
Datagroup:
Tracer NILEx Diversity
Keywords:
Tracer Nilex
Values:
2
1
3
Contributors:
No information available

Dataset column

Name:
composition
Definition:
litter species composition
Unit:
No information available
Datagroup:
Litter species composition
Keywords:
Tracer Nilex
Values:
Sap
Querc_Schi
Querc_Sap
Querc
Querc_Sap_Schi
Contributors:
No information available

Dataset column

Name:
labelled_species
Definition:
labelled litter species in mixture; Datagroup description: Information on the species found in the respective litter mixture
Unit:
No information available
Datagroup:
Litter species
Keywords:
Tracer Nilex
Values:
Querc
Sap
Schi
Contributors:
No information available

Dataset column

Name:
sample_species
Definition:
sample litter species; Datagroup description: Information on the species found in the respective litter mixture
Unit:
No information available
Datagroup:
Litter species
Keywords:
Tracer Nilex
Values:
Sap
Schi
Querc
Contributors:
No information available

Dataset column

Name:
status
Definition:
labelling status (N = unlabelled, L = labelled leaf litter); Datagroup description: Information on the species found in the respective litter mixture
Unit:
No information available
Datagroup:
Litter species
Keywords:
Tracer Nilex
Values:
L
N
Contributors:
No information available

Dataset column

Name:
weight_g
Definition:
remaining biomass at the respective timestep
Unit:
g
Datagroup:
remaining litter mass
Keywords:
Tracer Nilex
Values:
0
0.02
0.03
0.01
0.04
Contributors:
Plaga, B., Wolfgang H. Müller, Ulrike Erhardt

Dataset column

Name:
weight_perc
Definition:
remaining biomass at the respective timestep in percent
Unit:
%
Datagroup:
remaining litter mass
Keywords:
Tracer Nilex
Values:
100
0.8
102.43
0.5
0
Contributors:
No information available

Dataset column

Name:
amt_perc_ N
Definition:
litter nitrogen content
Unit:
%
Datagroup:
litter nutrient concentration
Keywords:
Tracer Nilex
Values:
1.3653841
0
0.0389633
1.2815902
0.0355265
Contributors:
No information available

Dataset column

Name:
leaf_delta_15N
Definition:
leaf litter delta 15N values
Unit:
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
-0.04
0.49
0.46
0
-0.16
Contributors:
No information available

Dataset column

Name:
atom_perc_15N
Definition:
leaf litter 15N atom% values
Unit:
atom%
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
0.3665
0.3663
0
0.3659
0.3662
Contributors:
No information available

Dataset column

Name:
15N_excess_µmol_15N_per_gDW
Definition:
15N_excess_µmol_15N_per_gDW
Unit:
µmol_15N_per_gDW
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
0.0018
0.002
0
0.0046
0.0084
Contributors:
No information available

Dataset column

Name:
total_15N_excess_per_sample
Definition:
total_15N_excess_per_sample
Unit:
µmol_15N_per_sample
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
0
0.0045
0.0012
0.0029
0.0007
Contributors:
No information available

Dataset column

Name:
Li_excess_µmol_Li_per_g_DW
Definition:
Li_excess_µmol_Li_per_g_DW
Unit:
µmol_Li_per_g_DW
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
0.058
0
0.03
0.046
0.049
Contributors:
No information available

Dataset column

Name:
Li_excess_µmol_Li_sample_total
Definition:
Li_excess_µmol_Li_sample_total
Unit:
µmol_Li_per_g_sample
Datagroup:
Tracer concentration
Keywords:
Tracer Nilex
Values:
0
0.056
0.047
0.044
0.028
Contributors:
No information available

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