Fine root tree species distribution in experimental plots Kaltenborn and Satakunta

Usage Rights

This data is Free within projects.

Dataset Abstract

The NIRS spectra of the root samples as well as the calibration mixtures were analysed with a FTIR Spectrometer (Shimadzu IR Prestige-21, Kyoto, Japan), equipped with an integrating sphere (NIR IntegratIR, PIKE Technologies, WI, USA). Each spectrum was recorded as the average of 64 scans over the range between 3800 and 10000 cm-1 (i.e. 1000–2600 nm) with a resolution of 8 cm-1. Five spectra were taken from each sample and averaged before further statistical analyses.
Calibration mixtures were prepared for single species and different combinations of species with incremental additions of approx. 10 % of the respective species components.
Data analyses of the NIRS spectra were performed by partial least squares (PLS) regression using The Unscrambler X (version 10.1, Camo Software AS, Oslo, Norway). Mathematical pre-treatments during data analyses comprised no treatment, 1/x weighting of the original x-data, first and second derivative of Savitzky-Golay smoothing, as well as mean and peak normalisation. The part of the spectrum below 1200 nm was omitted due to background noise. The analyses included multivariate calibration and full cross-validation.

Temporal Extent

Samples taken in August and September 2011

Data columns available in the raw data part of this dataset

site
site
Data group: Experimental site
Values
Satakunta
Kaltenborn
plot_ID
plot_ID
Data group: Experimental plot id
Values
13
12
11
10
1
depth
depth
Unit: cm, except organic
Data group: Soil depth
Keywords: soil depth
Values
10–20
0–10
org
20–30
30–40
Picea
percentage of Picea abies roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Values
25.33430904857214
0
100
16.78200194428441
15.579419882170734
Pinus
percentage of Pinus sylvestris roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
17.58899054695529
16.274645048340236
18.33914410560989
100
0
Larix
percentage of Larix sibirica roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
0
14.209589169728476
13.139278325104623
14.1877995541962
100
Betula
percentage of Betula pendula roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
13.198324362128409
16.714483036368648
100
0
13.601406449301168
Alnus
percentage of Alnus glutinosa roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
100
11.368029393807344
10.638666050156656
10.366203791828188
0
Douglas
percentage of Pseusdotsuga menziesii roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
26.00531896917789
29.295156751350138
0
100
32.271929951540066
Fagus
percentage of Fagus sylvatica roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
14.146510180521288
100
0
10.981047945132074
13.478528528336406
Quercus
percentage of Quercus sp. roots in respective soil layer, out of all tree roots
Unit: %
Data group: Species composition
Keywords: fine roots
Values
100
14.005153120033665
0
16.067612464159332
11.897949995693645