BEFmod: crown morphology data Site B 2015

Usage Rights

This data is Free within projects.

Private

Dataset Abstract

The BEFmod experiment is subject to a manipulation of resource supply and biotic impacts to examine whether Biodiversity-Ecosystem-Functioning (BEF) relationships may change under different environmental influences. BEFmod was conducted on subplots in each VIP plot in the Main Experiment and started in 2014. A total of five subplots (designated A to E) were established on the four northern planting rows of each VIP plot. Each subplot is of an area of 5.16 x 5.16m and contains 4 x 4 tree planting positions. Subplots were randomly assigned to five different treatments: Insecticide application, aboveground fungicide application, phosphorous fertilization, partial weeding and no weeding. Tree crown characteristics strongly determin the magnitude of light capture (Binkley et al. 2013) and have been commonly used to predict tree growth rates (e.g. Pretzsch 2009). Canopy stratification is proposed and also has been evidenced to be one key complementarity mechanism for the positive biodiversity and plant productivity relationship (Menalled et al. 1998, Morin et al. 2011). We, therefore, measured the crown diameter and crown base height of each tree individuals on all subplots in each VIP plot.In line with the objective of BEFmod, we aim to investigate density-dependent and resource-rich based mechanisms affecting the response of canopy characteristics at community level.

Dataset Design

All tree positions on the four northern planting rows of each VIP in site B were surveyed.

Spatial Extent

BEF-China Main Experiment Site B, all VIP Plots.

Temporal Extent

The end of annual growing season of deciduous tree species.

Taxonomic Extent

Schima superba
Cyclobalanopsis glauca
Lithocarpus glaber
Castanopsis eyrei
Castanopsis sclerophylla
Diospyros japonica
Daphniphyllum oldhamii
Cinnamomum camphora
Ailanthus altissima
Alniphyllum fortunei
Betula luminifera
Castanopsis fargesii
Celtis biondi
Elaeocarpus chinensis
Elaeocarpus glabripetalus
Elaeocarpus japonicus
Idesia polycarpa
Meliosma flexuosa
Machilus grijsii
Machilus thunbergii
Machilus leptophylla
Manglietia fordiana
Pheobe bournei
Quercus phillyraeoides

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 identifier
Values
t207280010019
t207280010116
t207280010017
t207280010016
t207280010018
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
Values
p209250
p210290
p213220
p207280
p213070
barcodePos
the grid position of the individual according to Z1/Z2 label
Data group: Position within Main experiment plots
Keywords: tree identifier
Values
pos0016
pos0019
pos0017
pos0018
pos0116
sppcode
the species identity recorded in code surveyed in 2014
Data group: Species codes (Species numbers in the Main experiment)
Values
15
12
11
13
14
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 architectural parameters
Keywords: crown length, crown morphology, crown base height, crown volume
Values
101
10
100
1
0
CD_EW
the crown diameter measured along the E-W direction
Unit: centimeter
Data group: Crown architectural parameters
Keywords: crown diameter, crown morphology, crown volume, crown Dimension, canopy cover
Values
102
100
1
10
0
CD_NS
the crown diameter measured along the N-S direction
Unit: centimeter
Data group: Crown architectural parameters
Keywords: crown projection area, crown diameter, crown volume, crown Dimension, canopy cover
Values
10
0
1
101
100
BrDead
the number of dead branches
Data group: Branch demography
Values
1
11
12
0
10
BrAlive
the number of living branches
Data group: Branch demography
Values
10
105
1
11
0
broken
1 indicates the main stem is broken
Data group: Helper
Values
1
0
team
measuring team
Data group: Helper
Values
t7
t3
t8
t5
t6
date
Measuring date (d/dd/mm/yyyy)
Data group: Date time information
Values
d15102015
d16102015
d17102015