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Title:
Tree and shrub seedlings functional traits from a transplant experiment in Dujiangyan
Access rights:
Private
Usage rights:
No information available
Published:
No information available
Abstract:
Here we present the result from a two-year field experiment in which we transplanted seedlings of 14 woody species representing three contrasting functional types(broad-leaved evergreen, deciduous and coniferous species) along a light gradient into the understory of a subtropical forest in southwestern China. We assessed mortality and measured the growth rate of all transplanted individuals at intervals. To further understand the mechanisms leading to seedling mortality and growth, we examined three functional traits of transplanted individuals (SLA, leaf mass ratio, wood density).
Design:
Seedlings of each species were sown in spring 2007 in a nursery near the field sites. We set up 6 quadrats at each of the two sites along a light gradient. Quadrats 1, 4, 7, 9 and 11 were in low light, quadrats 2, 5, 8 and 12 in high light and quadrats 3, 6 and 10 were in the open (simulating a forest gap). In August 2007, we transplanted four seedlings of each species into each of the 12 quadrats in a random pattern. A field map was drawn for each quadrat to help locating each seedling in the following surveys. We then checked the survival of seedlings two weeks after transplanting and found that all seedlings survived. We revisited each quadrat in March 2008, August 2008, January 2009 and July 2009, documented seedling survival, height and stem diameter (at 2 cm above ground) for all seedlings which were still alive.Light (light availability and quality) and soil factors (water and nutrient content, pH) were quantified in each quadrat.At each census date, after recording survival, the height of surviving seedlings was measured from the ground to the highest shoot tip above ground and the diameter was measured on the stem at 2 cm above ground with calipers. In July 2009, all the surviving seedlings were harvested after all the non-destructive measurements had been taken. In the laboratory, each seedling was separated into leaf, stem and root fractions. Then we measured SLA, WD and LMR.
Spatial extent:
The study was carried out from August 2007 to July 2009 at two forest sites near Dujiangyan, Sichuan, SW China. The prevailing vegetation type is secondary, mixed coniferous and broad-leaved subtropical forest. The climatic conditions are subtropical with a dry winter (November–April) and a warm and rainy summer (May–October). The annual average temperature is 15.2 °C and July average temperature is 25 °C. The mean annual precipitation is 1341 mm and the annual average relative humidity is above 80%.
Temporal extent:
August 2007 to July 2009
Taxonomic extent:
The 14 species studied are commonly found in subtropical forest in Dujiangyan. We included 6 evergreen broad-leaved, 6 deciduous broad-leaved and 2 evergreen coniferous species representing 9 families.
Measurement cirumstances:
No information available
Data analysis:
No information available

Filter:
Dataset column

Name:
census_helper
Definition:
census
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
4
2
3
1
5
Contributors:
No information available

Dataset column

Name:
census
Definition:
census
Unit:
No information available
Datagroup:
Time series
Keywords:
date
Values:
census 4
census 5
census 1
census 2
census 3
Contributors:
No information available

Dataset column

Name:
time
Definition:
days after the initiation of the experiment
Unit:
No information available
Datagroup:
Exposure time
Keywords:
time
Values:
180
720
0
520
365
Contributors:
No information available

Dataset column

Name:
site_helper
Definition:
site A or B
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
'A'
Contributors:
No information available

Dataset column

Name:
site
Definition:
site A or B
Unit:
No information available
Datagroup:
Dujiangyan experimental blocks
Keywords:
location
Values:
site 'A'
Contributors:
No information available

Dataset column

Name:
Q_helper
Definition:
quadrate
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
12
2
1
10
11
Contributors:
No information available

Dataset column

Name:
Q
Definition:
quadrate within site
Unit:
No information available
Datagroup:
Dujiangyan experimental blocks
Keywords:
location
Values:
quadrate 2
quadrate 1
quadrate 10
quadrate 12
quadrate 11
Contributors:
No information available

Dataset column

Name:
Season
Definition:
W-winter; S-summer
Unit:
No information available
Datagroup:
Season
Keywords:
date, season
Values:
winter
summer
Contributors:
No information available

Dataset column

Name:
year
Definition:
Year 1, 2 and 3
Unit:
No information available
Datagroup:
Exposure time
Keywords:
date
Values:
year 3
year 1
year 2
Contributors:
No information available

Dataset column

Name:
Con
Definition:
Y-conifer; N-not conifer; Datagroup description: Plant functional group or life form
Unit:
No information available
Datagroup:
Plant functional group or life form
Keywords:
functional trait
Values:
not conifer
c
Contributors:
No information available

Dataset column

Name:
ED
Definition:
E-evergreen; D-deciduous; Datagroup description: Plant functional group or life form
Unit:
No information available
Datagroup:
Plant functional group or life form
Keywords:
functional trait
Values:
d
e
Contributors:
No information available

Dataset column

Name:
fam
Definition:
family
Unit:
No information available
Datagroup:
Plant family name
Keywords:
No information available
Values:
'Ebenaceae'
'Araliaceae'
'Alangiaceae'
'Fagaceae'
'Anacardiaceae'
Contributors:
No information available

Dataset column

Name:
sp
Definition:
species
Unit:
No information available
Datagroup:
Scientific plant species name
Keywords:
species, taxon
Values:
Camellia oleifera
Choerospondias axillaris
Castanea henryi
Aralia chinensis
Alangium chinense
Contributors:
No information available

Dataset column

Name:
ind
Definition:
individual number within plot
Unit:
No information available
Datagroup:
Helper
Keywords:
No information available
Values:
2
4
3
1
Contributors:
No information available

Dataset column

Name:
ind2
Definition:
sequential individual number
Unit:
No information available
Datagroup:
Dujiangyan Individual Identifier
Keywords:
object
Values:
100
102
1
10
101
Contributors:
No information available

Dataset column

Name:
N
Definition:
Nitrogen concentration in the soil
Unit:
g/kg
Datagroup:
Nitrogen
Keywords:
soil, nitrogen, explanatory
Values:
2.2
1.9
1.5
2.41
2.4
Contributors:
No information available

Dataset column

Name:
C
Definition:
carbon concentration in the soil
Unit:
g/kg
Datagroup:
Carbon
Keywords:
soil, carbon, explanatory
Values:
30.1
19.4
13.7
31.52
31.32
Contributors:
No information available

Dataset column

Name:
P
Definition:
Phosphorus concentration in the soil
Unit:
g/kg
Datagroup:
Phosphorus
Keywords:
explanatory, phosphorus, soil
Values:
0.4
0.2
0.36
0.30000000000000004
0.29
Contributors:
No information available

Dataset column

Name:
moisture
Definition:
soil moisture
Unit:
%
Datagroup:
Gravimetric water content of soil
Keywords:
soil, water content
Values:
29.6
32.4
29.7
34.1
34.6
Contributors:
No information available

Dataset column

Name:
ph
Definition:
soil PH
Unit:
No information available
Datagroup:
pH value
Keywords:
explanatory
Values:
4.5
4
4.1
4.48
4.35
Contributors:
No information available

Dataset column

Name:
par
Definition:
photosynthetic active radiation
Unit:
umol m-2 s-1
Datagroup:
Solar radiation
Keywords:
design variable
Values:
0.7
0.86
0.82
0.76
0.8
Contributors:
No information available

Dataset column

Name:
lai
Definition:
leaf area index
Unit:
No information available
Datagroup:
Leaf Area Index (LAI)
Keywords:
explanatory
Values:
1.9
1.8
2.13
0.1
1.41
Contributors:
No information available

Dataset column

Name:
nf
Definition:
red:far-red ratio; Instrumentation: SKR 660/730
Unit:
No information available
Datagroup:
Light quality
Keywords:
explanatory
Values:
0.74
0.68
0.71
0.72
0.7
Contributors:
No information available

Dataset column

Name:
height
Definition:
seedling height
Unit:
cm
Datagroup:
Plant height
Keywords:
size, response variable
Values:
0.6000000000000001
0.9
0.30000000000000004
*
0.5
Contributors:
No information available

Dataset column

Name:
iniheight
Definition:
Initial seedling height
Unit:
cm
Datagroup:
Plant height
Keywords:
size, response variable
Values:
0.6000000000000001
0.5
0.9
0.30000000000000004
*
Contributors:
No information available

Dataset column

Name:
girth
Definition:
seedling girth at 1cm
Unit:
mm
Datagroup:
Basal diameter
Keywords:
size, response variable
Values:
0.492
0.34
0.59
0.81
0.45
Contributors:
No information available

Dataset column

Name:
sv
Definition:
survival observation (1-alive; 0-dead)
Unit:
No information available
Datagroup:
Living status
Keywords:
survival, response variable
Values:
1
0
Contributors:
No information available

Dataset column

Name:
bioR
Definition:
root biomass
Unit:
g
Datagroup:
Above and below ground biomass measurement
Keywords:
biomass, response variable, belowground biomass
Values:
0.16
0.06
0.17
0.13
0.19
Contributors:
No information available

Dataset column

Name:
bioS
Definition:
stem biomass
Unit:
g
Datagroup:
Above and below ground biomass measurement
Keywords:
biomass, response variable
Values:
0.04
0.08
0.05
0.07
0.03
Contributors:
No information available

Dataset column

Name:
bioL
Definition:
leaf biomass
Unit:
g
Datagroup:
Above and below ground biomass measurement
Keywords:
biomass, leaf, response variable
Values:
0.03
0.05
0.02
0.06
0.07
Contributors:
No information available

Dataset column

Name:
Area
Definition:
leaf area; Instrumentation: LI-3100C Area Meter
Unit:
cm2
Datagroup:
Leaf area
Keywords:
response variable
Values:
101.13
101.52
100.07
10.14
0.11
Contributors:
No information available

Dataset column

Name:
WD
Definition:
wood density
Unit:
g cm-3
Datagroup:
Wood density
Keywords:
response variable
Values:
0.0360707
0.052128999999999995
0.0402208
0.016822399999999998
0.0703268
Contributors:
No information available

Dataset column

Name:
SLA
Definition:
specific leaf area; Instrumentation: LiCor LAI 2000
Unit:
cm2 g-1
Datagroup:
Specific leaf area
Keywords:
response variable
Values:
100.515
104.213
101.704
101.079
1048.02
Contributors:
No information available

No information available


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Attachment:

File name:
transplanting_trait_workbook_original_from_china_portal.xls
Description:
Original file as exported from the Chinese portal
Uri:
No information available
Is essential:
No information available
Content type:
application/vnd.ms-excel
File size:
1.37 MB
Created at:
2013-09-18
Updated at:
2013-09-18

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15 schmid medium

Bernhard
Schmid

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125 li medium

Xuefei
Li

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