Main Experiment: Tree inventory Main experiment Site B 2010

Usage Rights

This data is Free for members.

Dataset Abstract

This data documents the tree growth parameters in 2010 for site B, belonging to the annual inventory taking place for both site A and site B. Individual-tree growth is a function of stand attributes, local neighbors, plant size, plant damage, genotype, and local abiotic site conditions. Given a certain time phase (combing further data along the timeline), the following scientific questions will be investigated: a) How does the within-plot individual-tree growth vary within and among species as a function of species richness? b) Wheather diversity reduces competition by quantifying local neighbour interactions in terms of growth rates and branch demography? c) What are the ecological importance of phenotypic plasticity of tree individuals in relation to competition, species richenss, and local terrain conditions? d) How the individual-tree growth is affected by soil feed-backs (mycorrhiza, pedogenetic processes,soil chemistry and nutrient cycle)? The overall objective with the data to be achieved is to test the hypothesis that the diversity effect at the plot level is the overall result of the diversity effects at the local neighbourhood level. This data as a basis can also be linked to other abiotic and biotic factors for investigating the interactions between the tree growth performance and abiotic and biotic factors. Measurement for this data took place in October 2010. Measurements were conducted in the central part (extended core area) of all 1mu-plots in site A. Extended core area is the central 6 * 6 trees in the monoculture and 2-species mixtures ( total 36 tree positions per 1mu-plot), the central 12 * 12 trees in the 4-,8-,16-,24-species mixtures (total 144 tree positions per 1 mu-plot). By applying the conventional measuring methods direct in the field, tree position, tree species, total height, stem diameter 5 cm above ground height (gd), the diameter at breast height (dbh), the distance up to the first branch, the distance up to the longest branch, the diameter, the length, the azimuth and the angle of the longest branch, the crown diameters (N-S and E-W) were measured and the number of branches were counted.

Dataset Design

The tree positions in the so called extended core area for each 1mu-plot were surveyed. The extended core area is the central 6 * 6 tree positions in the monocultres and 2-species mixtures (36 tree positions per 1mu-plot) and the central 12 * 12 tree positions in the 4-, 8-, 16- or 24- species mixtures (144 tree positions per 1mu-plot).

Spatial Extent

This data was collected from site B within the BEF-China experiment, which is located in a hilly subtropical region near Xingangshan Township, Jiangxi Province (29.08-29.11 N, 117.90- 117.93 E), China. The mean annual temperature is 16.7 celsius degrees and the mean annual average precipitation 1821 mm. The natural vegetation of this region is subtropical broad-leaved forest with dominance in abundance of evergreen species (Bruelheide et al. 2011). Site B was planted in 2010 and covers a total area of 26.6 ha, ranging in altitude from 105 to 190 m.

Taxonomic Extent

Castanopsis sclerophylla
Cyclobalanopsis glauca
Castanopsis eyrei
Lithocarpus glaber
Schima superba
Cinnamomum camphora
Daphniphyllum oldhamii
Diospyros japonica
Betula luminifera
Castanopsis fargesii
Celtis biondii
Elaeocarpus japonicus
Michilus grijsii
Machilus leptophylla
Manglietia fordiana
Quercus phillyreoides
Alanthus altissima
Alniphyllum fortunei
Elaeocarpus chinensis
Elaeocarpus glabripetalus
Idesia omeiensis
Machilus thunbergii
Meliosma flexuosa
Phoebe bournei

Measurement Circumstances

The measurements were conducted after the weeding in autumn and before the deciduous trees leaved off. Choosing this season is because a) weeded plots shorten the time consumed for identifying the tree positions; b) during this period, trees reach their highest height for this growing season (Pilot Experiment approved, unpublished data); c) Leaf-on gives a more accurate estimation on crown diameter.

Paper proposal submissions

Published

2014

Data columns available in the raw data part of this dataset

TAG
code for planting locations, 12 digits with "t" in front; Datagroup description: Tree or shrub tags consist of 12 digits: The first 6 are the site plot name: _1_ site _2/3_ row, counting from North _4/5_ column, counting from west _6_ is the plot moved? Is it a quarter plot? The next 6 digits describe the tree individual _7/8_ type of individual (01 planned tree, 02 other tree than planted but in a given plot somewhere, 03 planned shrub, 04 other shrub within this plot) _9/10_ x grid position within plot, starting from southwest northwards _11/12 y grid position, starting from southwest eastwards.
Data group: t or s TAG Main Experiment
Keywords: tree individual, location, object
Values
t203270010407
t203270010405
t203270010404
t203270010406
t203270010408
plot2010
plot2010
Data group: BEF research plot name
Keywords: Main Experiment, Site B, location
Values
p203270
p204250
p204270
p204260
p205240
PLOT_NO
name of each plot, coded with letters and numbers
Data group: Plot name Main experiment (letter, number code)
Keywords: Main Experiment, Site B, location
Values
E24
C27
D26
D25
D27
id2010
the SP2 grid position
Data group: IdTree SP2
Values
id0403
id0303
id0304
id0404
id0405
spp2010
the species name surveyed in 2010
Data group: Scientific plant species name
Keywords: species
Values
Betula luminifera
Acer davidii
Ailanthus altissima
Alniphyllum fortunei
Castanopsis carlesii
spp.code2010
the species code surveyed in 2010
Data group: Species codes (Species numbers in the Main experiment)
Values
11
12
13
?
10
height2010
the total tree height; 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: response variable, height
Values
102
100
103
101
10
gd2010
the stem ground diameter ( 5 cm aboveground ); Datagroup description: Stem diameter at 5 cm above ground was measured; Instrumentation: calliper
Unit: centimeter
Data group: Basal diameter
Keywords: response variable, basal diameter
Values
0.2
0.1
0.3
0.05
0.25
dbh2010
the diameter at breast height ( 130 cm aboveground ); Instrumentation: calliper
Unit: centimeter
Data group: Diameter at breast height
Keywords: response variable, dbh
Alert Sample values are not displayed because this column hasn't been approved yet.
h1st2010
the distance up to the first living branch, for branchless trees, the distance up to the first living leaf was recorded; Instrumentation: linear tape
Unit: centimeter
Data group: Bifurcation point
Keywords: bifurcation point, crown architecture
Values
0.4
0
0.3
0.2
0.1
hlong2010
the distance up to the longest branch; Instrumentation: linear tape
Unit: centimeter
Data group: Branch demography
Keywords: branch
Values
0.5
0.1
0.4
0.2
0.3
llong2010
the length of the longest branch; Instrumentation: linear tape
Unit: centimeter
Data group: Branch demography
Keywords: response variable, branch
Values
0.3
0.5
1
0.2
0.1
dlong2010
the diameter for the longest branch ( 1cm from stem )
Unit: centimeter
Data group: Branch demography
Keywords: response variable, branch
Values
0.05
0.06
0.03
0.01
0.02
anlong2010
the elevation angle of the longest branch; Instrumentation: angle finder
Unit: degree
Data group: Branch demography
Keywords: response variable, branch
Values
10
1
0
0.1
0.5
azlong2010
the azimuth of the longest branch; Instrumentation: compass
Unit: degree
Data group: Branch demography
Keywords: response variable, branch
Values
100
0
105
1
10
nbranch2010
the number of branches (taking account of branches longer than 1 cm)
Data group: Branch demography
Keywords: response variable, branch
Values
0.2
0.3
0.15
0
1
ns.crown2010
the crown diameter along N-S cardinal direction
Unit: centimeter
Data group: Crown architecture
Keywords: crown architecture
Values
100
1
10
0
10.5
ew.crown2010
the crown diameter along E-W cardinal direction
Unit: centimeter
Data group: Crown architecture
Keywords: crown architecture
Values
1
103
104
0
10
comment2010
comments
Data group: Comments
Values
anlong missing
0Blätter,0Äste
anlong, nbranch typo
0 Blätter,0Äste
30 - heller, unten weiß, ganz klein gezähnt
date
the survey date
Data group: Date time information
Keywords: date
Values
2010-09-16
2010-09-18
2010-09-03
2010-09-17
2010-09-09