CSP successional age estimates based on stem diameter distribution and tree ring width

Usage Rights

This data is Free for public.

Permission is granted to anybody to access, use and publish all open for public data freely. The commercial use of any data is prohibited. The quality and completeness of data cannot be guaranteed. Users employ these data at their own risk. In order to make attribution of use for owners of the data possible, the identifier of ownership of data must be retained with every data record. Users must publicly acknowledge, in conjunction with the use of the data, the data owners. Cite the data as follows: Bruelheide, H., von Oheimb, G., Nadrowski, K. and Baruffol, M. (2013): CSP successional age estimates based on stem diameter distribution and tree ring width. BEF-China data portal (Accessed through URL http://china.befdata.biow.uni-leipzig.de/datasets/197)

Dataset Abstract

Comparative Study Plots of the BEF-China experiment were selected according to a gradient of successional age and a crossed gradient of tree diversity. This file describes measures of stem diameter distribution from the CSPs, as well as basal area measures, which can give quantitative insight into the structure of the plots at different successional ages as defined by Mr. Fang. Use the column max_5 for plot age.

Dataset Design

CSPs were selected according to a successional age and a diversity gradient. There are 27 CSPs. Within each CSP, trees were sampled in a hierarchical design. Plot size is 30x30m, but the center 10x10m subplot was sampled in higher intensity than the other plots. In the outer plots, trees from 10cm diameter at breastheight were sampled, in the center trees and shrubs from 3cm on. We thus used 9* the data from small trees (<10cm) in the central subplot to reach plot scale. We additionally had to estimate the diameter at breastheight of some small trees which were only measured at the base, this is mentioned in more detaill in the methods. We additionally included the stems affected by the snowbreak to derive the conditions of the plots just before the snowbreak in Winter 2008.

Spatial Extent

The Gutianshan National Nature Reserve (NNR) is located in the western part of Zhejiang Province (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Fig. 1). The Gutianshan NNR has an area of approximately 81 km2 and was initially established as a National Forest Reserve in 1975 and became a National Nature Reserve in 2001. The NNR comprises a large portion of broad-leaved forests of advanced successional stages (Hu & Yu 2008), which have not been managed since the beginning of the 1990ies, as well as young successional stages and conifer plantations, mainly of Cunninghamia lanceolata and Pinus massoniana. --- The vegetation is composed of different types of subtropical evergreen and mixed broad-leaved forests (Yu et al. 2001). Most of the stands are secondary forests, evidenced by maximum tree ages of 180 years, by agricultural terraces in almost all plots and by the presence of charcoal in almost all soil profiles. Around the Gutianshan NRR extensive deforestation has occurred during the Great Leap Forward in the 1950s, as in most parts of Southeast China. However, due to prevailing steep slopes, the Gutianshan area was only marginally usable for agricultural activities, and thus an exceptionally intact forest cover has been preserved. --- The climate at Gutianshan NNR is warm and temperate with a short dry season in November and December and with warm summers (Fig. 2). The climatic conditions are characteristic for the subtropics with an annual average temperature of 15.1°C, January minimum temperatures of -6.8°C, July maximum temperatures of 38.1°C and an accumulated temperature sum (≥ 5°C) of 5221.5 degree days.

Temporal Extent

data is the dbh data collected in 2008

Taxonomic Extent

The data aggregates stem diameters of tree and shrub species in the CSPs.

Data Analysis

Use the column max_5 for plot age. This dataset collects numerous parameters that describe the stem diameter distribution of the CSPs. All of them can be used as characteristics of the CSPs.

Paper proposal submissions

Published

2012

Data columns available in the raw data part of this dataset

CSP
name of the CSP in the Nature ReserveBEF research plot nameReasearch 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
CSP04
CSP03
CSP05
CSP01
min
minimum stem diameter; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
1.181342814
2.304968363
2.310292415
2.309712675
2.307070259
qu25
25 % quantile of stem diameters; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
2.999192615
2.554817365
2.844246507
2.4390301895
2.625937425
med
median stem diameter; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
12.085
11.72
3.15
10.25
12.64
qu75
75 % stem diameter; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
13.015
15.415
13.71421906
15
11.625
max
maximum stem diameterSuccessional age of a forest plot
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
21.18
23.22
24.24
17.5
24.3
CSPageF
concatenation of the CSP name and successional stage as defined by Mr. Fang at the time of plot selectionHelper
Data group: Helper
Values
1_CSP22
1_CSP20
1_CSP16
1_CSP24
1_CSP19
ageF
successional stage as defined by Mr. Fang at the time of plot selectionSuccessional age of a forest plot
Data group: Successional age of a forest plot
Keywords: succession, successional age
Values
3
5
4
1
2
mean
mean stem diameter
Unit: centimeter
Data group: Stem diameter distribution
Keywords: dbh
Values
10.591000911125
11.1454731125955
12.7357512107
11.4360259586356
10.3147972531535
interqur
interquartile range of stem diametersStem diameter distribution
Unit: centimeter
Data group: Stem diameter distribution
Keywords: dbh
Values
11.435
11.205387226
10.61421906
10.5759698105
1.095182635
skew
skewness of the stem diameter distributionStem diameter distribution
Data group: Stem diameter distribution
Keywords: dbh
Values
1.08926293604376
0.925943518294786
1.10022812949078
0.816770673697502
0.636818515617448
kurt
kurtosis of the stem diameter distributionStem diameter distribution
Data group: Stem diameter distribution
Keywords: dbh
Values
13.4629093791015
10.417355980841
12.2741342197205
10.1345068989199
10.7456629160998
var
variance of the stem diameter distributionStem diameter distribution
Unit: centimeter squared
Data group: Stem diameter distribution
Keywords: dbh
Values
101.390759996732
11.2729293152508
101.207249844238
10.0397870228694
115.791210409187
sd
standard deviation of the stem diameter distributionStem diameter distribution
Unit: centimeter
Data group: Stem diameter distribution
Keywords: dbh
Values
10.9467997397343
10.069297889959
10.7606324353723
11.1177732332656
10.0601814021537
CV
Coefficient of variation of the stem diameter distributionStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.621059144393701
0.581256816342811
0.549984940160768
0.58121712805497
0.558677436511016
aF1
indicating, whether the plot belongs to a specific successional age class as defined in ageF: 1st age classHelper
Data group: Helper
Values
0
1
aF2
indicating, whether the plot belongs to a specific successional age class as defined in ageF: 2nd age classHelper
Data group: Helper
Values
0
1
aF3
indicating, whether the plot belongs to a specific successional age class as defined in ageF: 3rd age classHelper
Data group: Helper
Values
0
1
aF4
indicating, whether the plot belongs to a specific successional age class as defined in ageF: 4th age classHelper
Data group: Helper
Values
1
0
aF5
indicating, whether the plot belongs to a specific successional age class as defined in ageF: 4th age classHelper
Data group: Helper
Values
0
1
CSPageD
concatenation of the CSP name and successional stage as defined by G. von OheimbHelper
Data group: Helper
Values
1_CSP16
1_CSP17
1_CSP22
1_CSP20
1_CSP19
ageD
successional stage as defined by G. von Oheimb based on stem diameter distribution and information provided by Mr. FangSuccessional age of a forest plot
Data group: Successional age of a forest plot
Keywords: successional age
Values
2to5
1
3to5
2
3
aD1
indicating, whether the plot belongs to a specific successional age class as defined in ageD: 1st age classHelper
Unit: logical
Data group: Helper
Values
0
1
aD2
indicating, whether the plot belongs to a specific successional age class as defined in ageD: 2nd age classHelper
Unit: logical
Data group: Helper
Values
0
1
aD3
indicating, whether the plot belongs to a specific successional age class as defined in ageD: 3rd age classHelper
Unit: logical
Data group: Helper
Values
0
1
aD4
indicating, whether the plot belongs to a specific successional age class as defined in ageD: 4th age classHelper
Unit: logical
Data group: Helper
Values
1
0
aD5
indicating, whether the plot belongs to a specific successional age class as defined in ageD: 5th age classHelper
Unit: logical
Data group: Helper
Values
0
1
to5
percent of stems having a diameter between 3 and 5 cmStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.318897637795276
0.3375
0.321428571428571
0.348387096774194
0.152542372881356
to10
percent of stems having a diameter between 5 and 10 cmStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.064516129032258
0.153333333333333
0
0.0805084745762712
0.135
to20
percent of stems having a diameter between 10 and 20 cmStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.0543478260869565
0.0366666666666667
0.0212765957446809
0.0261569416498994
0.0695876288659794
to30
percent of stems having a diameter between 30 and 60 cmStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.00531914893617021
0.003584229390681
0.00804828973843058
0.00588235294117647
0
to60
percent of stems having a diameter between 30 and 60 cmStem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0.00298953662182362
0.00337837837837838
0.00603621730382294
0
0.00254777070063694
to80
percent of stems having a diameter larger than 60 (maximum was below 80)Stem diameter distribution
Unit: percent
Data group: Stem diameter distribution
Keywords: dbh
Values
0
0.0176470588235294
0.0169491525423729
0.00625
0.00446428571428571
wbshape
Weibull distribution shape parameter based on stem diametersStem diameter distribution
Data group: Stem diameter distribution
Keywords: Weibull distribution, dbh
Values
1.17963452588576
1.02703039555973
1.1892131402958
1.15895630811896
1.15491133575686
wbscale
Weibull distribution scale parameter based on stem diametersStem diameter distribution
Data group: Stem diameter distribution
Keywords: Weibull distribution, dbh
Values
11.9736757523177
13.8071437226491
11.4449650948459
11.7670013768136
12.2139578455232
wbshapesd
standard deviation of the Weibull distribution shape parameter based on stem diametersStem diameter distribution
Data group: Stem diameter distribution
Keywords: Weibull distribution, dbh
Values
0.0414044796459589
0.044545907671126
0.0393968746205962
0.0406604069044947
0.0401074884847356
wbscalesd
standard deviation of the Weibull distribution scale parameter based on stem diametersStem diameter distribution
Data group: Stem diameter distribution
Keywords: Weibull distribution, dbh
Values
0.143871830892903
0.157997863562333
0.146706291146481
0.138390287866473
0.106912168500411
age_HB
successional age of the CSP, by Helge BruelheideSuccessional age of a forest plot
Data group: Successional age of a forest plot
Keywords: successional age
Values
5
4
3
1
2
CSPageHB
concatenating CSP identity with age estimate by HBHelper
Data group: Helper
Values
1_CSP19
1_CSP26
1_CSP20
1_CSP22
1_CSP16
dbh_10
number of trees larger than 10cm in dbh, based on stems larger than 10 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
11
107
12
20
25
dbh_15
number of trees larger than 10cm in dbh, based on stems larger than 15 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
16
13
15
19
17
dbh_20
number of trees larger than 10cm in dbh, based on stems larger than 20 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
13
0
2
16
11
dbh_25
number of trees larger than 10cm in dbh, based on stems larger than 25 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
13
11
0
1
10
dbh_30
number of trees larger than 10cm in dbh, based on stems larger than 30 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
1
11
12
10
0
dbh_35
number of trees larger than 10cm in dbh, based on stems larger than 35 cm found 2008 in the CSPsStem diameter distribution
Unit: count
Data group: Stem diameter distribution
Keywords: dbh
Values
18
0
10
11
1
age_HB_comments
comments by Helge Bruelheide on his age classificationof the CSPsHelper
Data group: Helper
Values
19 trees with dbh>15 cm
16 trees with dbh>20 cm
19 trees with dbh>25 cm
14 trees with dbh>30cm
18 trees with dbh>25 cm
max_1
dbh of the largest tree in a CSP; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
24.3
24.24
23.22
21.18
17.5
max_2
dbh of the 2nd largest tree in a CSP; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
21.75
17.1
23.82
21.4
20.54
max_3
dbh of the 3rd largest tree in a CSP; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
16.27
20.51
20.54
19.84
18.66
max_4
max_4; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
19.17
19.49
20
12.74
17.64
max_5
max_5; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
12.32
13.54
16.88
18.73
17.74
max_6
max_6; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
13.54
12.2
17.52
16.21
17.07
max_7
max_7; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
15.76
11.85
17.32
11.46
16.91
max_8
max_8; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
16.72
17.01
15.13
11.15
10.99
max_9
max_9; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
10.51
11.02
15.48
14.3
16.34
max_10
max_10; Diameter at breast height;
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
14.65
14.08
10.25
10.71
16.31
tree_age_max5
correlated age of the 5th largest tree, based on stem cores taken in the CSPs; taken as estimate for the plot successional ageSuccessional age of a forest plot
Unit: year
Data group: Successional age of a forest plot
Keywords: tree age, successional age
Values
106.200269215238
21.7205276618657
105.769524835106
101.300551891237
115.542037959348
Distr_GvOheimb_comments
comments by Goddert von Oheimb to the age classification by him and by Mr. FangHelper
Data group: Helper
Values
clear, relatively many in 15cm class (12-17cm)
belongs to 5
belongs to 3
clear
could fit into 1
ageFang2008
successional age in years as provided by Mr. FangSuccessional age of a forest plot
Data group: Successional age of a forest plot
Keywords: successional age
Values
1998
2008 - (100)
2008 - (15)
2008 - (12)
2008 - (12-15)
* Fang, T. also contributed to this column.
MrFang
information on land use history and successional age of the Comparative study plot
Data group: Land use
Keywords: successional age, land use history
Values
40 years, ridge, slow growing
40 years ago logged, then free succession
About 100 years old, natural fire, no cutting.
30 years ago selective cutting, some old trees remained
40-50 years ago cut, then Cunninghamia planted, cut again, succession
* Fang, T. also contributed to this column.