CSPs: Tree species Carbon (C) and Nitrogen (N) Concentration (Root, Stem, Twig, Leaf) of 8 target species in the CSPs

Usage Rights

This data is Private.

Dataset Abstract

Leaf, twig, stem and root samples were taken from eight “target” species (four trees, two deciduous: Castanea henryi, Quercus serrata and two evergreen: Castanopsis eyrei, Schima superba; four shrubs, one deciduous: Rhododendron simsii and three evergreen: Loropetalum chinense, Camellia fraterna, Eurya muricata) in autumn 2008. Furthermore, leaf samples from the target species were collected in spring 2009, summer 2009 and winter 2010 to detect seasonal variation in N concentration. Species were sampled in all CSPs where they were present. For the seasonal patterns, always the same tree individuals were sampled. Total C+N pools in tree and shrub biomass will further be calculated based on the C+N concentration measurements.

Dataset Design

Leaf samples were taken with telescope pruning shears (lenght: up to 6.5m) from the lower outer and preferentially sun exposed canopy when possible. Leaves of shrub species were sampled in upper canopy. One year old twigs, and roots which a diameter between 1 and 3mm were taken for C and N analysis. All samples were dried at 70°C, ground and analyzed for C and N using an elemantal analyzer available at Peking University (Prof. Jin-Sheng He).

Spatial Extent

CSPs of the BEF China Experiment, Gutianshan Nature Reserve
29°08'-29°17'N
118°02'-118°11'E

Temporal Extent

2008 to 2010

Taxonomic Extent

Castanea henryi, Quercus serrata and two evergreen: Castanopsis eyrei, Schima superba; four shrubs, one deciduous: Rhododendron simsii and three evergreen: Loropetalum chinense, Camellia fraterna, Eurya muricata

Data Analysis

No leaf samples were collected for Castanea henryi and Quercus serrata in winter 2010 since these species are deciduous. Rhododendron simsii can be classified as semi-deciduous because it sheds the big leaves in autumn but keeps small ones the whole winter which were also sampled.

Data columns available in the raw data part of this dataset

Number_ST
Sample NumberHelper
Data group: Helper
Values
1
100
1000
1001
10
Species
Species name; ;
Data group: Scientific plant species name
Keywords: species
Values
Eurya muricata
Castanopsis eyrei
Castanea henryi
Loropetalum chinense
Camellia fraterna
Date
Sampling dateDate time information
Data group: Date time information
Keywords: date
Values
2008-03-30
2008-10-12
2008-04-30
2008-10-15
2008-10-14
Organ
Sampled plant partPlant organ sampled
Data group: Plant organ sampled
Keywords: twig, leaf, stem, root, plant organ
Values
R
T
S
Leaf
ID
Identification number of the individualCSP tree tag number
Data group: CSP metal tag number (trees, woody debris)
Keywords: tree individual
Values
1111081
1311081
0911081
0911082
1911081
CSP
name of the CSP in the Nature ReserveBEF research plot name Reasearch plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). There are three main sites for research plots in the BEF Experiment: Comparative Study Plots (CSP) in the Gutianshan Nature Reserve, having a size of 30x30m^2, measured on the ground.
Data group: BEF research plot name
Keywords: CSP
Values
CSP02
CSP01
CSP04
CSP05
CSP03
Age_3
Age class, classification system using three classes, defined in the CSP age fileHelper
Data group: Helper
Keywords: succession
Values
1
3
2
Age_5
Age class, classification system using five classes, defined in the CSP age fileHelper
Data group: Helper
Values
2
3
4
1
5
Season
Season; Autumn 2008: Samples were taken between 23.10.- 22.11. Spring 2009: Samples were taken between 30.03. - 10.05. Summer 2009: Samples were taken between 26.07.-09.08. Winter 2010: Samples were taken between 08.02.-20.02.
Data group: Season
Keywords: season
Values
Win10
Sum09
Aut08
Spr09
Carbon
Carbon concentration; ; Elemental Analyzer
Unit: percent
Data group: Carbon
Keywords: carbon
Values
42.67
41.59
42.74
40.99
42.54
Hydrogen
Hydrogen concentration
Unit: percent
Data group: Chemical elements
Keywords: hydrogen
Values
5.8
5.83
5.84
5.82
5.79
Nitrogen
Nitrogen concentration
Unit: percent
Data group: Nitrogen
Keywords: nitrogen
Values
0.08
0.07
0.09
0.06
0.05
CN_ratio
CN-Ratio
Unit: ratio
Data group: Carbon Nitrogen ratio
Keywords: C/N ratio
Values
101.25
100.125
100.06122448979592
100.52
100.76086956521739