NILEx tracer (leaf): dry weight of leaves, leaf decomposition

Usage Rights

This data is Free within projects.

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

Acknowledgement of non members: Manuel Hiß, Mr. Qi and other Chinese helpers (fieldwork), Benjamin Plaga 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.

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 collected in autumn 2011.

Measurement Circumstances

not easy to clean the leaves

Data Analysis

The total weight of litter mixtures was measured after cleaning and drying at 40°C

Data columns available in the raw data part of this dataset

plot_ID
Plot identity code; is composed of the following informatioN: T (=TracerNILEx) + number of the respective block + number of the respective plot + Litter diversity Level + Labelled litter species in the Mixture
Data group: NILEx research plot
Keywords: TraxerNILEx, NILEx, plot
Values
T_B1_P07_D1_Schi
T_B1_P09_D2_Querc_Schi
T_B1_P05_D1_Sap
T_B1_P03_D1_Querc
T_B1_P10_D2_Querc_Schi
mesocosm_ID
Mesocosm identity code; is composed of the following informatioN: T (=TracerNILEx) + Timestep + number of the respective block + number of the respective mesocosm + Litter diversity Level + Labelled litter species in the Mixture
Data group: NILEx research plot
Keywords: TraxerNILEx, NILEx, plot, mesocosm
Values
T_T0_B1_P07_D1_Schi
T_T0_B1_P03_D1_Querc
T_T0_B1_P10_D2_Querc_Schi
T_T0_B1_P09_D2_Querc_Schi
T_T0_B1_P05_D1_Sap
carex_leaf_barcode
Sample identity of reference species. Is composed of: TN(=TracerNILEx)+G(=green leaves)+"-"+Timestep+Block+Plot
Data group: NILEx Barcode
Keywords: TracerNILEx, reference plant
Values
TNG-T0B1P07
TNG-T0B1P09
TNG-T0B1P10
TNG-T0B1P05
TNG-T0B1P03
carex_ root_barcode
Sample identity of reference species. Is composed of: TN(=TracerNILEx)+R(=root)+"-"+Timestep+Block+Plot
Data group: NILEx Barcode
Keywords: TracerNILEx, reference plant
Values
TNR-T0B1P05
TNR-T0B1P07
TNR-T0B1P10
TNR-T0B1P03
TNR-T0B1P09
timestep
Timestep of sample collection ofter exposure
Data group: Time series
Keywords: TracerNILEx, decomposition, timestep
Values
T3
T0
T4
T1
T2
days
Duration of decomposition trial
Data group: Exposure time
Keywords: TracerNILEx, decomposition, timestep.duration
Values
0
12
171
101
37
block
Number of Block within the NILEx experiment
Data group: NILEx research plot
Keywords: TraxerNILEx, NILEx, plot, block
Values
B2
B3
B1
plot
Number of Plot within the respective NILEx plot
Data group: NILEx research plot
Keywords: TraxerNILEx, NILEx, plot
Values
P03
P07
P04
P05
P06
diversity
Diversity of litter mixture: D1= Monoculture, D2= 2-species mixture, D3= 3-species mixture
Data group: Litter diversity
Keywords: TraxerNILEx, NILEx, litter diversity
Values
D3
D1
D2
composition
Species composition within the mixture: Querc= Quercus acutissima, Schi= Schima superba, Sap= Sapindus mukorossi
Data group: Litter species composition
Keywords: TraxerNILEx, NILEx, litter diversity
Values
Querc_Sap
Querc_Sap_Schi
Sap
Querc_Schi
Querc
labelled_species
Indicates the species which was labelled in the respective litter mixture
Data group: Stable isotope
Keywords: TraxerNILEx, NILEx, litter diversity, labelled
Values
Querc
Sap
Schi
mesocosm_position
position of the microcosm selected randomy within the respective plot and respective timestep
Data group: NILEx research plot
Keywords: TraxerNILEx, NILEx, plot, mesocosm
Values
4
NA
3
2
1
total_weight_g
total dry weight of leaf mixture
Unit: g
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
0.07
0.019
0.0496
0.056
0.09
total_weight_perc
total dry weight of leaf mixture
Unit: %
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
100
0.37254901960784315
0.9725490196078431
10.490196078431374
10.554901960784315
total_weight_mean
Mean weight of each litter mixture at the respective timestep
Unit: g
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
10.87
19.436405228758172
12.919150326797386
10.18921568627451
100
pred_weight_perc
predicted mass loss from single species [%] based on mean value
Unit: %
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
100
14.32
16.775
12.24
10.87
carex_rest_weight
dry weight of Carex leaf litter
Unit: g
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
0
0.001
0.009
0.007
0.004
carex_roots_weight
dry weight of Carex roots
Unit: g
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
0.01
0.009
0.008
0.005
0.002
carex_leaf_weight
dry weight of Carex green leaves
Unit: g
Data group: Decomposition
Keywords: TracerNILEx, decomposition
Values
0.007
0.011
0.01
0.013
0.001498
carex_leaves_15N
15-N stable isotope ratio (d15N) of Carex leaves
Data group: Stable isotope
Keywords: TracerNILEx, decomposition, isotope ratio, d15N
Values
0.044
0.07685714285714196
0.154
0.16485714285714193
0.1865
carex_roots_15N
15-N stable isotope ratio (d15N) of Carex roots
Data group: Stable isotope
Keywords: TracerNILEx, decomposition, isotope ratio, d15N
Values
-0.1561250000000005
0.056874999999999454
0.1166666666666667
0.01687499999999953
0.035874999999999546
carex_leaves_AP
Atomic percentage of 15N in Carex leaves
Unit: %
Data group: Stable isotope
Keywords: TracerNILEx, decomposition, isotope ratio, d15N
Values
0.3643042996739588
0.364291208670171
0.364222117204302
0.36394169837644863
0.3642519356381672
carex_roots_AP
Atomic percentage of 15N in Carex roots
Unit: %
Data group: Stable isotope
Keywords: TracerNILEx, decomposition, isotope ratio, d15N
Values
0.36461225545479276
0.3644969824880198
0.3645409826109128
0.36410097963319166
0.3644275276694891