CSPs:Tree demographical survey in CSPs--sapling individuals

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Dataset Abstract

The survey on the sapling individuals of selected four key species in CSPs fills out the information gap in term of demographical population dynamic analysis. Integrating the census of target trees (including the individuals with larger than 10 cm DBH in subplots 11,21,31,12,32,13,23,33, and individuals with larger than 3 cm DBH in subplot 22 )to this piece of data, the fecundity, recruitment and mortality will be revealed; so that the demographic dynamics of the species over time, and the quantitative assessment of the long-term stability or development of the populations in the successional stages of the forests will be investigated. The sapling individuals among all CSPs in GNNR were surveyed by means of labelling, tree height, tree diameter and tree living status were assessed. Four species were considered as key species of this study: Schima superba, Quercus serrata, Lithocarpus glaber, Castanopsis eyrei because of their high abundances. This inventory was carried out in a half-year interval from April 2011 to April 2012.

Dataset Design

Selection of target species: the two most abundant evergreen and deciduous species were selected. Individuals belonging to these species which are not surveyed by SP1e/SP1c (in most situations saplings and small size trees) were labelled with four digitis before which "2S_" was indicated. Then, the total height and the stem diameters (basal diameter / diameter at breast height) were measured. If the tree individual is not single stem, the number of the stems was counted. The status such as dead, new germinated, broken stem/branch etc. were documented in the column of comments.

Spatial Extent

Comparative Study sites, BEF China Experiment, Gutianshan National Nature Reserve (GNNR), China. The GNNR is located in the western part of Zhejiang Province (29°8'18"-29°17'29" N, 118°2'14'-118°11'12'' E). The forest is representative of Chinese broad-leaved forests (Wu 1980, Hu and Yu 2008, Legendre et al. 2009) with evergreren species dominating the forest in number of individuals (Yu et al. 2001) but with approximately similar proportions of deciduous species in terms of species number (Lou and Jin 2000).

Temporal Extent

During this time frame, the inventory was conducted three times (April 2011, September 2011 and March/April 2012 respectively).

Taxonomic Extent

Sapling tree individuals of Schima superba, Lithocarpus glaber, Quercus serrata and Castanopsis eyrei in all 27 CSPs. If the survey abundance reached to 100 individuals in 22 subplot, the remaining subplots were not further surveyed. If the survey abundance of individuals did not reach to 100 in 22 subplots, other subplots will be randomly selected until the abundance of the collected individuals exceeds 100.

Data columns available in the raw data part of this dataset

CSP
CSP
Data group: BEF research plot name
Keywords: CSP, tree demography
Values
CSP01
CSP02
CSP03
CSP05
CSP04
subplot
the subplot number within the CSP
Data group: Subplots within CSPs
Keywords: subplot
Values
3
5
1
4
2
id
the tag ID for each individual within one plot; Datagroup description: Across all CSPs, all sapling individuals under four species (Schima superba, Lithocarpus glaber, Quercus serrata, Castanopsis eyrei) were given a 4 digits ID.
Data group: CSPs: 4 digits tree identifier
Keywords: CSP metal tag number
Values
0103
0001
0102
0100
0101
species
the identified species (ScSu=Schima superba, LiGl=Lithocarpus glaber, CaEy=Castanopsis eyrei, QuSe=Quercus serrata)
Data group: Scientific plant species name
Keywords: species, taxon
Values
Lithocarpus glaber
Castanopsis eyrei
Quercus serrata
Schima superba
gd_042012
the stem ground diameter measured in April 2012; Datagroup description: Stem diameter at 5 cm above ground was measured; Instrumentation: calliper
Unit: centimeter
Data group: Basal diameter
Keywords: basal diameter
Values
0.06
0.09
0.1
0.08
0.07
gd_092012
the stem ground diameter measured in September 2012; Instrumentation: calliper
Unit: centimeter
Data group: Basal diameter
Keywords: basal diameter
Values
0.09
0.06
0.08
0.05
0.07
dbh_042012
DBH measured in April 2012
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
0.54
0.58
0.4
0.42
0.6
dbh_092012
DBH measured in September 2012; Datagroup description: Stem diameter at 1.3m above ground was measured
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
0.58
0.66
0.05
0.54
0.57
height_042012
the total height measured in April 2012; Datagroup description: Total height was measured as the length from stem base to the apical meristem.; Instrumentation: linear tape
Unit: centimeter
Data group: Plant height
Keywords: height
Values
10
103
102
101
100
height_092012
the total height measured in September 2012; Instrumentation: linear tape
Unit: centimeter
Data group: Plant height
Keywords: height
Values
102
103
100
10
101
multistems_092012
the number of stems of multistem individuals, measured in September 2012
Data group: Multistem
Keywords: multistems
Values
2
3
4
2 became 1
5
comment_092012
comments made during the survey September 2012
Data group: Comments
Values
close to 0520
1 measured branch dead
C. fargesii
400019
after cut, regeneration
gd_042013
the stem ground diameter measured in April 2013; Instrumentation: calliper
Unit: centimeter
Data group: Basal diameter
Keywords: basal diameter
Values
0.08
0.09
0.07
0.05
0.1
dbh_042013
DBH measured in April 2013
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh
Values
0.67
0.45
0.6
0.57
0.69
height_042013
the total height measured in April 2013; Instrumentation: linear tape
Unit: centimeter
Data group: Plant height
Keywords: height
Values
103
101
100
102
10
multistems042013
the number of stems of multistem individuals surveyed in April 2013
Data group: Multistem
Values
1
3
2
4
5
comment_042013
comments made during the survey April 2013
Data group: Comments
Values
close to 0509
close to 0117
chinese writing
close to 2296
dead