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Title:
Main Experiment: Tree inventory Main experiment Site A 2011
Access rights:
Free for members
Usage rights:
No information available
Published:
No information available
Abstract:
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.
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.
Temporal extent:
No information available
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 cirumstances:
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.
Data analysis:
No information available

Filter:
Dataset column

Name:
TAG
Definition:
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.
Unit:
No information available
Datagroup:
t or s TAG Main Experiment
Keywords:
tree individual, location, object
Values:
t102340010407
t102340010408
t102340010406
t102340010405
t102340010404
Contributors:
No information available

Dataset column

Name:
PLOT_NO
Definition:
plot name
Unit:
No information available
Datagroup:
Plot name Main experiment (letter, number code)
Keywords:
plot
Values:
B34
B36/C36
B35
C31
B38/C38
Contributors:
No information available

Dataset column

Name:
PTAG
Definition:
plot code, BEF research plot name, 6 digits with "p" in front; Datagroup description: Research plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). Main Experiment plots have a size of 1 mu, which is about 25x25m^2 in horizontal projection. Pilot Study Plots have a size of 1x1 m^2. Research plots on the main experiment have a "p" in front of their IDs and then a 6 digit code: Plots in the main sites A and B are named according to their position in the original spreadsheet, in which they were designed. They consist of 6 digits: _1st digit_: Site (1:A, 2:B), _digit 2and3_: southwards row: as in spreadsheets the rows are named from the top to the bottom; _digit 4 and 5_: westward column: as in the original spreadsheet, but the letters are converted to numbers (A=01, B=02); _6th digit_: indicator, if the plot has been shifted a quarter mu. Example: "p205260": "p" means that this is a plot that is specified. "2" means, that we are at site B. Now the coordinates of the south - west corner: "0526". Since "e" is the fifth letter of the alphabet, this is Plot E26. The last digit "0" means that this plot was not moved by a quarter of a Mu, as some sites in Site B. The 6th digit can also indicate the subplot within the plot. "5", "6", "7", "8" indicate the northwest, northeast, southeast, and southwest quarter plot respectively.
Unit:
No information available
Datagroup:
BEF research plot name
Keywords:
Main Experiment, Site A
Values:
p103310
p102361
p102340
p102381
p102350
Contributors:
No information available

Dataset column

Name:
position
Definition:
position within the respective plot given in XXYY
Unit:
No information available
Datagroup:
Individual position within plot in Site A or B (given by SP1/SP2)
Keywords:
Main Experiment, individual position
Values:
1004
1006
1005
1003
1007
Contributors:
No information available

Dataset column

Name:
id
Definition:
the SP2 grid position
Unit:
No information available
Datagroup:
IdTree SP2
Keywords:
No information available
Values:
id10.10.
id10.12
id10.10
id10.11
id10.13
Contributors:
No information available

Dataset column

Name:
spp.code2011
Definition:
spp.code2011
Unit:
No information available
Datagroup:
Species codes (Species numbers in the Main experiment)
Keywords:
No information available
Values:
1
11
12
10
13
Contributors:
No information available

Dataset column

Name:
spp.code.n2011
Definition:
the species code surveyed in 2011
Unit:
No information available
Datagroup:
Species codes (Species numbers in the Main experiment)
Keywords:
plant species
Values:
11
1
13
12
10
Contributors:
No information available

Dataset column

Name:
spp2011
Definition:
the species name surveyed in 2011
Unit:
No information available
Datagroup:
Scientific plant species name
Keywords:
species
Values:
Castanopsis carlesii
Acer davidii
Castanopsis eyrei
Castanopsis fargesii
Castanea henryi
Contributors:
No information available

Dataset column

Name:
height2011
Definition:
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
Datagroup:
Plant height
Keywords:
response variable, height
Values:
102
10
103
100
101
Contributors:
No information available

Dataset column

Name:
gd2011
Definition:
the stem ground diameter ( 5 cm aboveground ); Datagroup description: Stem diameter at 5 cm above ground was measured; Instrumentation: caliper
Unit:
centimeter
Datagroup:
Basal diameter
Keywords:
response variable, basal diameter
Values:
0.05
0.1
0.11
0.08
0.15
Contributors:
No information available

Dataset column

Name:
h1st2011
Definition:
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
Datagroup:
Bifurcation point
Keywords:
bifurcation point, crown architecture
Values:
100
1
0.5
0
10
Contributors:
No information available

Dataset column

Name:
llong2011
Definition:
the length of the longest branch; Instrumentation: linear tape
Unit:
centimeter
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0.2
10
100
0
1
Contributors:
No information available

Dataset column

Name:
hlong2011
Definition:
the distance up to the longest branch; Instrumentation: linear tape
Unit:
centimeter
Datagroup:
Branch demography
Keywords:
branch
Values:
0.5
0
10
100
1
Contributors:
No information available

Dataset column

Name:
azlong2011
Definition:
the azimuth of the longest branch; Instrumentation: compass
Unit:
degree
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
100
1
0.9
10
0
Contributors:
No information available

Dataset column

Name:
anlong2011
Definition:
the elevation angle of the longest branch; Instrumentation: angle finder
Unit:
degree
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0
0.7
0.1
0.5
0.6
Contributors:
No information available

Dataset column

Name:
dlong2011
Definition:
the diameter for the longest branch ( 1cm from stem ); Instrumentation: caliper
Unit:
centimeter
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0.12
0.05
0.1
0
0.15
Contributors:
No information available

Dataset column

Name:
dbh2011
Definition:
the diameter at breast height ( 130 cm aboveground ); Instrumentation: caliper
Unit:
centimeter
Datagroup:
Diameter at breast height
Keywords:
response variable, dbh
Values:
0.5
0.8
0.7
0.6
0.4
Contributors:
No information available

Dataset column

Name:
cbh2011
Definition:
the crown base height; Instrumentation: linear tape
Unit:
centimeter
Datagroup:
Crown architecture
Keywords:
response variable, crown
Values:
130
134
123
114
110
Contributors:
No information available

Dataset column

Name:
ns.crown2011
Definition:
the crown diameter along N-S cardinal direction
Unit:
centimeter
Datagroup:
Crown architectural parameters
Keywords:
crown architecture
Values:
100
1
0
10
101
Contributors:
No information available

Dataset column

Name:
ew.crown2011
Definition:
the crown diameter along E-W cardinal direction
Unit:
centimeter
Datagroup:
Crown architectural parameters
Keywords:
crown architecture
Values:
10
1
0
101
100
Contributors:
No information available

Dataset column

Name:
nbranch2011
Definition:
the number of branches (taking account of branches longer than 1 cm)
Unit:
No information available
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
11
112
0
10
1
Contributors:
No information available

Dataset column

Name:
nd.branch2011
Definition:
the number of dead branches
Unit:
No information available
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
1
10
11
0
12
Contributors:
No information available

Dataset column

Name:
date
Definition:
the survey date
Unit:
No information available
Datagroup:
Date time information
Keywords:
date
Values:
d03102011
d06102011
d04102011
d01112011
d02102011
Contributors:
No information available

Dataset column

Name:
comment2011
Definition:
comments
Unit:
No information available
Datagroup:
Comments
Keywords:
No information available
Values:
actual 14.5
2stems
actual3.14
1
actual 11.5
Contributors:
No information available

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