Title:
TSQ: Basal areas of trees in TSQ in Site A
Access rights:
Private
Usage rights:
Private
Published:
No information available
Abstract:
The DBH of the trees of each TSQ were measured; these were converted to basal areas and the basal areas of all the trees within a TSQ were added, for a total tree basal area measurement for each TSQ. This serves as a measure of competition for the focal shrubs
Design:
The DBH of the trees of each TSQ were measured using the protocol; Protocol for TSQ measurement in the BEF.docx
Spatial extent:
BEF-China experiment, located near Xingangshang, Dexing City of Jianxi Province - Site A
Temporal extent:
No information available
Taxonomic extent:
Trees
Measurement cirumstances:
No information available
Data analysis:
The DBH measurements of trees in each TSQ were used to calculate individual tree basal areas. Following the following formula: BA=πr^2, where pi=3.14 and r is the circumference, each circumference and diameter measurement was converted into a basal area in R Studio. The basal areas of all measurements for an individual tree were then summed to yield the total basal area for each tree within a TSQ. Subsequently, the basal areas of all trees in each TSQ were combined to determine the total basal area of trees per TSQ.
Filter:
Dataset column
Name:
PLOT
Definition:
Location
Unit:
No information available
Datagroup:
Plot name Main experiment (letter, number code)
Keywords:
location
Values:
| D33 |
| C32 |
| D32 |
| C33 |
| E34 |
Contributors:
No information available
Dataset column
Name:
DIVERSITY_LEVEL
Definition:
Plot-level tree diversity (species richness); Datagroup description: During the establishment of the BEF-China experiment, they trees were planted to create plots of various diversity levels (1, 2, 4, 8 and 16)
Unit:
No information available
Datagroup:
Diversity
Keywords:
No information available
Values:
| 1 |
| 16 |
| 4 |
| 8 |
| 2 |
Contributors:
No information available
Dataset column
Name:
TSQ_SHRUB_ID
Definition:
Identification of the invidual shrubs, within the TSQS; Datagroup description: Within the plots, Tree Species Quadrats (TSQs) were created, which consist of a focal shrub in the centre and 4 surrounding trees, one on either corner of the quadrat. However, due to the high mortality rates of several species, many of the TSQs have less than 4 surrounding trees. The shrub coordinate, which is the same as the coordinate of the nearest tree in the SW direction (T1 of the TSQ), consists of four digits, representing the x and y coordinate (or row/column of the trees in the plot)
Unit:
Four-digit coordinate
Datagroup:
Identifier
Keywords:
location
Values:
| 0010 |
| 0003 |
| 0005 |
| 0004 |
| 0007 |
Contributors:
No information available
Dataset column
Name:
TSQ_SHRUB_SP
Definition:
Shrub species of the shrub within the TSQ
Unit:
No information available
Datagroup:
Plant trait
Keywords:
No information available
Values:
| Ardisia |
| Control |
| CaCh |
| DiMy |
Contributors:
No information available
Dataset column
Name:
TSQ_TREE
Definition:
Tree number based on the position of the tree in the TSQ; Datagroup description: The Tree Species Quadrats (TSQs) which were created, consist of a focal shrub in the centre and 4 surrounding trees, one on either corner of the quadrat. Tree 1 is defined as the tree in the SW corner (and has the same coordinate as the focal shrub), and then trees 2-4 go in a clockwise direction from there (NW, NE, SE). However, due to the high mortality rates of several species, many of the TSQs have less than 4 surrounding trees
Unit:
No information available
Datagroup:
Identifier
Keywords:
location
Values:
| TSQ3 |
| TSQ1 |
| TSQ2 |
| TSQ4 |
Contributors:
No information available
Dataset column
Name:
TREE_ID
Definition:
Coordinates of the tree; Datagroup description: The tree ID consists of four digits, representing the x and y coordinate (or row/column of the trees in the plot)
Unit:
Four-digit coordinate
Datagroup:
Identifier
Keywords:
location
Values:
| 0004 |
| 0006 |
| 0007 |
| 0 |
| 0005 |
Contributors:
No information available
Dataset column
Name:
TREE_BA
Definition:
Basal area of the individual tree; Datagroup description: The DBH measurements of trees in each TSQ were used to calculate individual tree basal areas. Following the same formula applied to shrubs, each circumference and diameter measurement was converted into a basal area in R Studio. The basal areas of all measurements for an individual tree were then summed to yield the total basal area for each tree within a TSQ.
Unit:
cm²
Datagroup:
Plant trait
Keywords:
No information available
Values:
| 0.2670353755551325 |
| 0.09628874057059669 |
| 0.3848451000647496 |
| 0.1256637061435917 |
| 0 |
Contributors:
No information available
Dataset column
Name:
SUM_TREES_TSQ
Definition:
Addition of the basal areas of all trees in the TSQ
Unit:
cm²
Datagroup:
Sum Basal Area
Keywords:
No information available
Values:
| 106.1253118283913 |
| 106.1603259158715 |
| 0 |
| 105.089213148863 |
| 104.5663891608062 |
Contributors:
No information available
No information available
No information available
No information avialable
Filter:
No information available
Filter:
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No information available
No information available