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Title:
NILEx tracer (leaf): decomposition rates of leaves and plot topography data
Access rights:
Free within projects
Usage rights:
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)
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:
Calculation of decomposition rate constant k with the negative exponential function.

Filter:
Dataset column

Name:
plot_ID
Definition:
Unique identity code for tracer nilex samples: TracerNILEx+Blocknumber+Plotnumber+Diversity+Samples in mixture; Datagroup description: Tracer New Integrated Litter Experiment
Unit:
No information available
Datagroup:
Helper
Keywords:
Tracer Nilex, leaf decomposition rate
Values:
T_B1_P07_D1_Schi
T_B1_P03_D1_Querc
T_B1_P09_D2_Querc_Schi
T_B1_P10_D2_Querc_Schi
T_B1_P05_D1_Sap
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, leaf decomposition rate
Values:
B2
B3
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, leaf decomposition rate
Values:
P03
P06
P07
P05
P04
Contributors:
No information available

Dataset column

Name:
diversity
Definition:
leaf litter species diversity in the mesocosms
Unit:
No information available
Datagroup:
Tracer NILEx Diversity
Keywords:
Tracer Nilex, leaf decomposition rate
Values:
D3
D2
D1
Contributors:
No information available

Dataset column

Name:
composition
Definition:
species in litter mixture
Unit:
No information available
Datagroup:
Litter species composition
Keywords:
Tracer Nilex, leaf decomposition rate
Values:
Querc_Schi
Querc_Sap_Schi
Querc_Sap
Querc
Sap
Contributors:
No information available

Dataset column

Name:
inclination
Definition:
inclination of the respective plot
Unit:
No information available
Datagroup:
Inclination
Keywords:
No information available
Values:
1
12
10
11
14
Contributors:
No information available

Dataset column

Name:
aspect
Definition:
aspect of the respective plot
Unit:
No information available
Datagroup:
Aspect
Keywords:
No information available
Values:
150
156
139
146
152
Contributors:
No information available

Dataset column

Name:
k
Definition:
leaf decomposition rate constant k; Datagroup description: Tracer New Integrated Litter Experiment
Unit:
d-1
Datagroup:
Decomposition
Keywords:
Tracer Nilex, leaf decomposition rate
Values:
0.0058183417843539
0.00436633589900467
0.00727793030510077
0.00804624013454595
0.00864801992965835
Contributors:
No information available

Dataset column

Name:
ssresid
Definition:
sum of squares residuals; Datagroup description: Tracer New Integrated Litter Experiment
Unit:
No information available
Datagroup:
Uncertainity measure
Keywords:
Tracer Nilex, leaf decomposition rate
Values:
0.106151789974557
0.0890753368566029
0.0661160744137443
0.0999748026828138
0.0749732520347089
Contributors:
No information available

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