Main Experiment: Tree inventory Main experiment Site A 2013

Usage Rights

This data is Free for members.

Dataset Abstract

This data documents the tree growth parameters in 2013 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

All 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.

Temporal Extent

During the end of growing season of deciduous tree species

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

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
t102340010405
t102340010407
t102340010406
t102340010408
t102340010404
plot
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.
Data group: BEF research plot name
Keywords: Main Experiment, Site A
Values
p102340
p103310
p102350
p102381
p102361
id
the grid position of the tree individual according to SP2 label
Data group: IdTree SP2
Values
id0406
id0404
id0407
id0408
id0405
barcodePos
the grid position of the individual according to Z1/Z2 label
Data group: Individual position within plot in Site A or B (given by SP1/SP2)
Values
pos0079
pos0000
pos0085
pos0045
pos0203
sppcode
the species identity recorded in code surveyed in 2013
Data group: Species codes (Species numbers in the Main experiment)
Values
1
12
?
10
11
height
the total tree height
Unit: centimeter
Data group: Plant height
Keywords: response variable, tree height, size, aboveground biomass
Values
102
100
10
101
103
cbh
the crown base height: The height from the ground to the bottom of the living crown of an individual tree.
Unit: centimeter
Data group: Crown architecture
Keywords: crown architecture, crown height, crown length, crown morphology
Values
0
1
10
100
101
llong
the length of the longest branch
Unit: centimeter
Data group: Crown architectural parameters
Keywords: branch, crown, crown architecture
Values
103
102
101
10
100
hlong
the height of the longest branch: the height from ground to the bifurcation point of the longest branch.
Unit: centimeter
Data group: Crown architectural parameters
Keywords: branch, crown, crown architecture
Values
1
10
100
0
101
anlong
the angle of the longest branch
Unit: degrees
Data group: Branch demography
Keywords: branch, crown, crown architecture
Values
20
0
15
10
25
azlong
the azimuth of the longest branch
Unit: degrees
Data group: Branch demography
Keywords: branch, crown, crown architecture
Values
110
0
10
100
116
dlong
the diameter of the longest branch
Unit: centimeter
Data group: Branch demography
Keywords: branch, crown architecture
Values
0.3
0.5
0.2
0.4
0.1
gdew
the stem diameter at 5 cm aboveground, measured along the E-W direction
Unit: centimeter
Data group: Basal diameter
Keywords: basal diameter, response variable
Values
0.3
0.5
0.2
0.4
0.1
gdns
the stem diameter at 5 cm aboveground, measured along the N-S direction
Unit: centimeter
Data group: Basal diameter
Keywords: basal diameter, response variable
Values
0.1
0.3
0.4
0.2
0.5
dbh1
the diameter at breast height ( 130 cm aboveground )
Unit: centimeter
Data group: Diameter at breast height
Keywords: dbh, response variable
Values
0.5
0.3
0.4
0.2
0.1
dbh2
the diameter at breast height ( 130 cm aboveground ) provided by multistems
Unit: centimeter
Data group: Diameter at breast height
Keywords: branch, response variable
Values
0.5
0.3
0.6
0.7
0.4
CD_EW
the crown diameter measured along the E-W direction
Unit: centimeter
Data group: Crown architectural parameters
Keywords: crown architecture, crown projection area, crown morphology
Values
0
100
1
10
101
CD_NS
the crown diameter measured along the N-S direction
Unit: centimeter
Data group: Crown architectural parameters
Keywords: crown architecture, crown projection area, crown diameter, crown morphology
Values
0
10
101
100
1
BrDead
number of dead branches
Data group: Branch demography
Keywords: branch, response variable
Values
0
10
12
11
1
BrAlive
number of living branches
Data group: Branch demography
Keywords: branch, response variable
Values
10
0
100
1
101
broken
1/0, inidcating if tree stem was broken or not
Data group: Helper
Keywords: tree, census, dead
Values
NA
0
1
team
census team
Data group: Helper
Keywords: census
Values
t1
t11
t2
t10
t3
Date
Date of census (d/dd/mm/yyyy)
Data group: Date time information
Keywords: date
Values
d17102013
d02112013
d01112013
d03112013
d18102013
comment
comments on the respective tree individual
Data group: Helper
Values
a not-planted tree23 close to this position
a not-planted tree3 on this position
a not-planted tree4 close to this position
a not-planted tree
a not-planted tree26 on this position
match1312
logical; indicating wether the respective tree could be matched with the same individual measured in 2012
Data group: Helper
Keywords: census, match
Values
y
n
gd_mean
the mean stem diameter at 5 cm aboveground, calcualted based on gdew and gdns
Unit: square centimeters
Data group: Basal diameter
Keywords: basal diameter
Values
0.1
0.3
0.35
0.2
0.4