Chlorophyll fluorescence in Exploratory Region Germany
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This data is Private.
FunDiv intern
Dataset Abstract
Productivity is great in forests with a capacity to intercept incoming radiation and harness its energy efficiently. Thus, understanding the relationships between forest diversity, tree canopy biomass and photosynthetic parameters is central to predicting how diversity will affect a key ecosystem function (i.e., productivity). Specific hypotheses to be tested: I) higher tree species diversity enables greater exploitation of light within forest canopies due to niche partitioning, increasing photosynthesis and primary production (NPP); II) photosynthetic acclimation (ecological resilience to changing environmental factors) on singular species may vary according to the varying ecological conditions, but is supposed to be maintained at plot level in mixed population (interaction of different species-specific behaviors). Photosynthetic acclimation was measured with chlorophyll fluorescence (ChlF), by applying fast and reliable techniques based on the fast kinetics of the chlorophyll fluorescence induction in dark adapted leaves. This method is called JIP-test and is based on the measure of the variable fluorescence at different steps of the fluorescence induction. The measurements were carried out in 38 plots of Germany Exploratory Region.
Dataset Design
Chlorophyll fluorescence measurements were replicated on 8 randomly chosen leaves per tree per two level of crown (top and bottom). The measurements were done on the twigs after the dark adaptation (at minumum four hours in black plastic bag, at ambient temperature). In evergreen conifers chlorophyll fluorescence measurements took in current year needles (i.e., needles sprouted in 2012, 1-year needles)
Spatial Extent
Hainich forest, Germany
Taxonomic Extent
5 tree species (total number sampled tree/specie): Fagus sylvatica (90), Acer pseudoplatanus (52), Fraxinus excelsior (70), Picea abies (33), Quercus sp. (42)
Data Analysis
Data are treated at tree level (for each tree the data are treated for crown level)
Data columns available in the raw data part of this dataset
Data group: Exploratory plot id
Values |
---|
GER05 |
GER03 |
GER02 |
GER01 |
GER04 |
Data group: Plot descriptor
Values |
---|
3 |
1 |
2 |
4 |
Data group: Tree species mix code
Values |
---|
AP-FE |
AP-FS-FE |
AP-FS-FE-PA |
AP-FS |
AP-FE-Q |
Data group: Tree species
Values |
---|
Fagus sylvatica |
Quercus sp |
Picea abies |
Fraxinus excelsior |
Acer pseudoplatanus |
Data group: Tree species id
Values |
---|
1 |
10 |
108 |
11 |
100 |
Data group: Tree id
Values |
---|
B |
T |
Unit: ms-1
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
0.10388571428571429 |
0.1045875 |
0.0949625 |
0.0894875 |
0.100325 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
0.18759999999999996 |
0.185825 |
0.1710125 |
0.1882 |
0.17415000000000003 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
0.5306833333333334 |
0.5405333333333333 |
0.49881250000000005 |
0.5143125 |
0.4834375 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
0.68165 |
0.6349333333333333 |
0.6782285714285714 |
0.6569 |
0.6538571428571429 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
136.9265875 |
14.3657125 |
124.4725375 |
14.810625000000002 |
14.812000000000001 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
100.40202500000001 |
100.79706250000001 |
100.18075 |
100.2527875 |
100.48594285714285 |
Unit: a.u.
Data group: Fluorescence parameters
Keywords: fluorescence, photosynthetic performance
Values |
---|
101.6842631826025 |
100.69953584953836 |
100.63342985863935 |
103.76189216340832 |
100.07233631225786 |
Keywords
chlorophyll fluorescence, fluorescence, photosynthetic performance, productivityLast update
2014-01-14 14:30