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Title:
CSPs: Tree size in the CSPs in 2008 and 2009
Access rights:
Private
Usage rights:
BEF-China intern
Published:
No information available
Abstract:
Tree size in diameter at breastheight (dbh) and/or basal area, as well as height of trees found in the CSPs. Tree tags and species names were later corrected in 2010, so for the corrected species names please refer to the data set "Corrected tree tags on the CSP trees and tree size measures from 2010.".
Design:
Each CSP consists of 9 subplots, trees in the center subplot were studied with greater intensity. Small stems are measured only in the central plot, larger stems might be in central plot or somewhere else, they are not marked.
Spatial extent:
The Gutianshan National Nature Reserve (NNR) is located in the western part of Zhejiang Province (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Fig. 1). The Gutianshan NNR has an area of approximately 81 km2 and was initially established as a National Forest Reserve in 1975 and became a National Nature Reserve in 2001. The NNR comprises a large portion of broad-leaved forests of advanced successional stages (Hu & Yu 2008), which have not been managed since the beginning of the 1990ies, as well as young successional stages and conifer plantations, mainly of Cunninghamia lanceolata and Pinus massoniana. --- The vegetation is composed of different types of subtropical evergreen and mixed broad-leaved forests (Yu et al. 2001). Most of the stands are secondary forests, evidenced by maximum tree ages of 180 years, by agricultural terraces in almost all plots and by the presence of charcoal in almost all soil profiles. Around the Gutianshan NRR extensive deforestation has occurred during the Great Leap Forward in the 1950s, as in most parts of Southeast China. However, due to prevailing steep slopes, the Gutianshan area was only marginally usable for agricultural activities, and thus an exceptionally intact forest cover has been preserved. --- The climate at Gutianshan NNR is warm and temperate with a short dry season in November and December and with warm summers (Fig. 2). The climatic conditions are characteristic for the subtropics with an annual average temperature of 15.1°C, January minimum temperatures of -6.8°C, July maximum temperatures of 38.1°C and an accumulated temperature sum (≥ 5°C) of 5221.5 degree days.
Temporal extent:
No information available
Taxonomic extent:
Tree species in the Comparative study plots.
Measurement cirumstances:
No information available
Data analysis:
This data can be used to identify tree stems with the "stemID" column. It can also be used to estimate tree size and therefore biomass using allometric equations. The simplest one would be to calculate the volumn of a cone from dbh and height.

Filter:
Dataset column

Name:
stemID
Definition:
ID of each stem, composed of the Plot number, tag identifier and stem number. The middle part is the silver Id, which was not unique in some cases, so that letters were added. Since multistem trees were only tagged once, they have a number added.
Unit:
No information available
Datagroup:
Tree identifier for trees in the comparative study sites (CSP plus Silver ID)
Keywords:
stem, tree, CSP, object
Values:
CSP01_362568_1
CSP01_363041_1
CSP01_363060_1
CSP01_363012_1
CSP01_363013_1
Contributors:
No information available

Dataset column

Name:
CSP
Definition:
name of the CSP in the Nature ReserveBEF research plot nameReasearch plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). There are three main sites for research plots in the BEF Experiment: Comparative Study Plots (CSP) in the Gutianshan Nature Reserve, having a size of 30x30m^2, measured on the ground.
Unit:
No information available
Datagroup:
BEF research plot name
Keywords:
CSP, location
Values:
CSP03
CSP02
CSP04
CSP01
CSP05
Contributors:
No information available

Dataset column

Name:
stemTag
Definition:
Number on the metal tag given in 2008 and 2009 and corrected in 2010, see "new stem tag" in the data set "Corrected tree tags on the CSP trees and tree size measures from 2010."
Unit:
No information available
Datagroup:
CSP metal tag number (trees, woody debris)
Keywords:
object
Values:
363036
355601
363012
362568
363013
Contributors:
No information available

Dataset column

Name:
old_Species
Definition:
Species name as used in older and uncorrected versions of the biomass file. See dataset "Corrected tree tags on the CSP trees and tree size measures from 2010." for the corrected species names.; Datagroup description: Helper
Unit:
No information available
Datagroup:
Helper
Keywords:
species, explanatory
Values:
Alangium kurzii
Alniphyllum fortunei
Acer amplum
Adinandra millettii
Albizia kalkora
Contributors:
No information available

Dataset column

Name:
BD
Definition:
basal diameter
Unit:
cm
Datagroup:
Basal diameter
Keywords:
response variable, basal diameter, size
Values:
2.4
2.8
2.5
2.6
1.7
Contributors:
No information available

Dataset column

Name:
DBH
Definition:
diameter at breastheight; Instrumentation: diameter tape, calliper (derived from datagroup); Instrumentation: diameter tape, calliper (derived from datagroup)
Unit:
cm
Datagroup:
Diameter at breast height
Keywords:
response variable, dbh, size
Values:
10.05
10.02
10.03
10.06
10
Contributors:
No information available

Dataset column

Name:
Height
Definition:
height of the tree; Instrumentation: Vertex Forester (derived from datagroup); Instrumentation: Vertex Forester (derived from datagroup)
Unit:
m
Datagroup:
Plant height
Keywords:
response variable, height, size
Values:
0.9
0.5
10
0.8
1
Contributors:
No information available

Dataset column

Name:
Height_comments
Definition:
comments on the status of the tree, especially if the height cannot be determined if the tree is broken at the top
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
Approximated_length_4_m
Approximated_length_3.5_m
Approximated_length_3_m
Approximated_length_5_m
Approximated_length_2.5_m
Contributors:
No information available

Dataset column

Name:
Stem_inclination
Definition:
stem inclination; Datagroup description: Stem morphology is measured as stem inclination and stem azimuth. To obtain the degree of stem inclination, we first measuredthe height of the bifurcation point (height at which the lowest living crown branch of the tree branches off, excluding epicormics orsprings), and then the horizontal distance of the bifurcation point from the stem in the direction of the slope. The angle ofinclination was calculated as tan alpha of these two distances. If the stem was inclined towards the slope, stem inclination wasconsidered to be negative. Stem azimuth was measured by placing a 1.3 m long woody stick with a wooden pendular along the stem. The direction of the pendular was measured by means of a compass.--- Stem slenderness is calculated as total height divided by stem diameter; Datagroup description: Stem morphology is measured as stem inclination and stem azimuth. To obtain the degree of stem inclination, we first measuredthe height of the bifurcation point (height at which the lowest living crown branch of the tree branches off, excluding epicormics orsprings), and then the horizontal distance of the bifurcation point from the stem in the direction of the slope. The angle ofinclination was calculated as tan alpha of these two distances. If the stem was inclined towards the slope, stem inclination wasconsidered to be negative. Stem azimuth was measured by placing a 1.3 m long woody stick with a wooden pendular along the stem. The direction of the pendular was measured by means of a compass.--- Stem slenderness is calculated as total height divided by stem diameter
Unit:
No information available
Datagroup:
Stem morphology
Keywords:
stem morphology, co-variable
Values:
25
15
20
10
30
Contributors:
No information available

Dataset column

Name:
Other_comments
Definition:
comments
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
369060_wrong
371980_wrong
377719_wrong
372860_wrong
370912_wrong
Contributors:
No information available

Dataset column

Name:
Year
Definition:
year
Unit:
No information available
Datagroup:
Date time information
Keywords:
date
Values:
2009
2008
Contributors:
No information available

Dataset column

Name:
broken
Definition:
top of the tree is broken, folded, or fallen; Datagroup description: Living status
Unit:
No information available
Datagroup:
Living status
Keywords:
response variable, survival, co-variable, mortality, damage
Values:
fallen
broken
folded
Contributors:

Dataset column

Name:
comment CWD
Definition:
comments, for example: CWD is coarse woody debris; comparison with coarse woody debris file; Datagroup description: Helper
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
CSP04_34
CSP05_3
branch found CWD ID CSP04_1
branch found: CWD ID CSP01_30, CSP01_33
CSP05_2
Contributors:

No information available


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Attachment:

File name:
Biomass_related_CSP_sp1_Aboveground biomass trees and shrubs_v12 - kn.xls
Description:
original file for the 2008 and 2009 data that also includes the x y coordinates of the trees, as well as the dbh measuring height. But other aspects might not be up to date.
Uri:
No information available
Is essential:
No information available
Content type:
application/vnd.ms-excel
File size:
1.04 MB
Created at:
2012-01-04
Updated at:
2012-01-19

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15 schmid medium

Bernhard
Schmid

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Martin
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