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Title:
Main Experiment: Shrub inventory Main experiment Site A 2011
Access rights:
Free for members
Usage rights:
No information available
Published:
No information available
Abstract:
This data documents the shrub growth parameters in 2011 for site A, belonging to the annual inventory taking place for both site A and site B. Individual-shrub 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-shrub 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 shrub individuals in relation to competition, species richenss, and local terrain conditions? d) How the individual-shrub 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 shrub growth performance and abiotic and biotic factors. Measurement for this data took place from the end of September 2011 to the beginning of October 2011. Measurements were conducted in the central part (extended core area) of all 1mu-plots in site A. Extended core area is the central 5 * 5 shrubs in the monoculture and 2-species mixtures ( total 35 shrub positions per 1mu-plot), the central 11 * 11 shrubs in the 4-,8-,16-,24-species mixtures (total 121 shrub positions per 1 mu-plot). By applying the conventional measuring methods direct in the field, shrub position, shrub species, total height, the crown diameters (in N-S and E-W cardinal directions), the length and the diameter of the tallest ramet / branch were measured and the number of ramets /branches and the number of the first-order branches were counted.
Design:
The shrub positions in the so called extended core area for each 1mu-plot were surveyed. The extended core area is the central 5 * 5 shrub positions in the monocultres and 2-species mixtures (25 shrub positions per 1mu-plot) and the central 11 * 11 shrub positions in the 4-, 8-, 16- or 24- species mixtures (121 shrub 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). Shrubs in site A were planted in 2011 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:
Ardisia crenata Camellia chekiangoleosa Distylium myricoides Muonymus myrianthus Eurya muricata Gardenia jasminoides Loropetalum chinense Rhaphiolepis indica Distylium buxifolium Syzygium buxifolium
Measurement cirumstances:
The measurements were conducted after the weeding in autumn and before the deciduous plants leaved off. Choosing this season is because a) weeded plots shorten the time consumed for identifying the plant positions; b) during this period, plants 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:
shrub individual, location, object
Values:
t103330030710
t103330030708
t103330030711
t103330030709
t103330030707
Contributors:
No information available

Dataset column

Name:
PTAG
Definition:
plot code, BEF research plot name, 6 digits with "p" in front; 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, location
Values:
p105300
p103330
p105320
p104320
p104330
Contributors:
No information available

Dataset column

Name:
id2011
Definition:
the SP2 shrub grid position within the plot
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
id0306
id0304
id0111
id0305
id0307
Contributors:
No information available

Dataset column

Name:
spp.code2011
Definition:
the species code surveyed in 2011
Unit:
No information available
Datagroup:
Species codes (Species numbers in the Main experiment)
Keywords:
No information available
Values:
2
16
20
1
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:
Eurya muricata
Ardisia crenata
Camellia chekiangoleosa
Distylium myricoides
Distylium buxifolium
Contributors:
No information available

Dataset column

Name:
height2011
Definition:
the total shrub height; Instrumentation: linear tape
Unit:
centimeter
Datagroup:
Plant height
Keywords:
response variable, height
Values:
102
101
100
10
1
Contributors:
No information available

Dataset column

Name:
ns.crown2011
Definition:
the crown diameter in NS cardinal direction
Unit:
centimeter
Datagroup:
Crown architecture
Keywords:
crown architecture
Values:
10
100
1
110
11
Contributors:
No information available

Dataset column

Name:
ew.crown2011
Definition:
the crown diameter in EW cardinal direction
Unit:
centimeter
Datagroup:
Crown architecture
Keywords:
crown architecture
Values:
105
100
1
10
0
Contributors:
No information available

Dataset column

Name:
nRamets2011
Definition:
the number of above-ground stems (i.e. ramets)
Unit:
No information available
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
10
118
0
1
11
Contributors:
No information available

Dataset column

Name:
nr_1order_br2011
Definition:
the number of the first-order branches (> 1 cm in length)
Unit:
No information available
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0
10
11
1
104
Contributors:
No information available

Dataset column

Name:
lTall2011
Definition:
the length of the tallest ramet / branch; Instrumentation: linear tape
Unit:
centimeter
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0
0.2
10
0.7
1
Contributors:
No information available

Dataset column

Name:
dTall2011
Definition:
the diameter of the tallest ramet / branch ( 5 cm above ground for ramets / with a distance of 1 cm from the stem for branches)
Unit:
centimeter
Datagroup:
Branch demography
Keywords:
response variable, branch
Values:
0
0.12
0.02
0.05
0.1
Contributors:
No information available

Dataset column

Name:
comment
Definition:
comments
Unit:
No information available
Datagroup:
Comments
Keywords:
No information available
Values:
505
spp unsure
1305
spp missing
1113
Contributors:
No information available

Dataset column

Name:
group
Definition:
measuring team
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
g05
g03
g01
g02
g04
Contributors:
No information available

Dataset column

Name:
date
Definition:
the survey date
Unit:
No information available
Datagroup:
Date time information
Keywords:
date
Values:
d04102011
d03102011
d07102011
d08102011
d02102011
Contributors:
No information available

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