Main Experiment: Tree inventory Main experiment Site A 2009

Usage Rights

This data is Free for members.

Dataset Abstract

This data documents the tree growth parameters in 2009 for site A, 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 A 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 A was planted in 2009 and covers a total area of 26.6 ha, ranging in altitude from 105 to 275 m. The relief is highly variable with slopes ranging from 0 to 45 degrees. The soils are Cambisols and Cambisol derivatives, interfered by Regosols on ridges and crests, and Anthrosols from colluvial deposits on foot slopes and valley floors. Due to the mountainous topography, erosion is a typical feature resulting a mixing of parent material and soil components from crest to valley positions.

Taxonomic Extent

Castanea henryi
Pinus massoniana
Schima superba
Choerospondia axillaris
Liquidambar formosana
Quercus serrata
Cyclobalanopsis myrsinifolia
Castanopsis carlesii
Cyclobalanopsis glauca
Lithocarpus glaber
Castanopsis eyrei
Castanopsis sclerophylla
Diospyros japonica
Daphniphyllus oldhamii
Cinnamomum camphora
Koelreuteria bipinnata
Sapindus mukorossi
Nyssa sinensis
Triadica sebifera
Triadica cochinchinensis
Rhus chinensis
Quercus fabri
Quercus acutissima
Melia azedarach
Acer davidii
Cunninghamia lanceolata
Castanopsis fargesii

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
t102340010404
t102340010407
t102340010405
t102340010406
t102340010408
height2009
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
101
100
102
103
10
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
gd2009
the stem ground diameter ( 5 cm aboveground ); Datagroup description: Stem diameter at 5 cm above ground was measured; Instrumentation: caliper
Unit: millimeter
Data group: Basal diameter
Keywords: response variable, basal diameter
Values
10.3
10.1
1
10
10.2
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
PLOT_NO
name of each plot, coded with letters and numbers
Data group: Plot name Main experiment (letter, number code)
Keywords: Main Experiment, Site A, location
Values
B34
B36/C36
B35
C31
B38/C38
dbh2009
the diameter at breast height ( 130 cm aboveground ); Instrumentation: caliper
Unit: millimeter
Data group: Diameter at breast height
Keywords: response variable, dbh
Values
NA
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
dlong2009
the diameter for the longest branch ( 1cm from stem ); Datagroup description: The analysis of branch demography is by means of: height and length of the longest branch (with a linear tape), ist diameter (at a distance of 1 cm from the stem with a caliper) elevation angle (measured from the horizontal with an angle finder), and azimuth (with a compass; Pearcy & Yang 1996); total number of branches > 1 cm.; Instrumentation: caliper
Unit: millimeter
Data group: Branch demography
Keywords: response variable, branch
Values
10.2
10
1
10.1
10.4
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
llong2009
the length of the longest branch; Instrumentation: linear tape
Unit: centimeter
Data group: Branch demography
Keywords: response variable, branch
Values
1
101
103
10
100
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
nbranch2009
the number of branches (taking account of branches longer than 1 cm)
Data group: Branch demography
Keywords: response variable, branch
Values
11
12
10
1
0
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
hlong2009
the distance up to the longest branch; Instrumentation: linear tape
Unit: centimeter
Data group: Branch demography
Keywords: branch
Values
0
1
106
100
10
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
h1st2009
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
10
11
1
0
107
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
anlong2009
the elevation angle of the longest branch; Instrumentation: angle finder
Unit: degree
Data group: Branch demography
Keywords: response variable, branch
Values
11
0
10
12
125
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
azlong2009
the azimuth of the longest branch; Instrumentation: compass
Unit: degree
Data group: Branch demography
Keywords: response variable, branch
Values
0
10
100
102
106
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
ns.crown2009
the crown diameter along N-S cardinal direction
Unit: centimeter
Data group: Crown architecture
Keywords: crown architecture
Values
101
10
1
0
100
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
ew.crown2009
the crown diameter along E-W cardinal direction
Unit: centimeter
Data group: Crown architecture
Keywords: crown architecture
Values
101
100
10
103
0
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
comments2009
comments2009
Data group: Comments
Values
azimuth missing
A or B?
(10.14)?
A/B-Zuordnung f?r ganzen Plot unsicher (Vgl. mit Martin Ba.)
azimuth in gon!
dbh.comments
dbh.comments
Data group: Helper
Values
azimuth in gon!
NA
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
page
page
Data group: Helper
Values
10_11
10_1
10_12
10_10
?
* These persons could not be matched within the portal: Jonas Daldrup also contributed to this column.
species2009
species2009
Data group: Scientific plant species name
Values
Castanopsis eyrei
Castanopsis sclerophylla
Acer davidii
Castanopsis carlesii
Castanea henryi