Experimental sites microbial data 2012

Usage Rights

This data is Free within projects.

On request and only members of the project. Note that labile carbon and nitrogen, pH and potential nitrification were measured on own funds. The other variables were aquired within the project.

Dataset Abstract

The biogeochemical cycling in forest ecosystems is highly dependent on the interactions between plants and soil. Tree species affect element cycling through deposition in throughfall, litterfall, microbial activities in soil and rhizosphere processes. Tree species diversification has been suggested for maintaining forest ecosystem services and combining provisioning and supporting services with multifunctional and sustainable forestry. However, the understanding of the role of biodiversity in forests is unclear, in particular concerning the microbial diversity and activity in soils. This file contains data of bacterial metabolic diversity, microbial biomass, pH, labile carbon and nitrogen, and potential nitrification (upper layers only) in organic and upper mineral soil horizons sampled in 2012 in the 209 plots of the Exploratory Platform of the FunDivEUROPE project (http://www.fundiveurope.eu/). This Exploratory Platform is a network of comparative plots of 1-5 tree species established in existing mature forest in 6 countries. These six focal regions represent important European forest types along the gradient from boreal forest to Mediterranean forest.

Dataset Design

Samples were taken in two regions (Germany-Biotree-Kaltenborn and FInland-Satakunta) of the Experimental Platform of FunDivEUROPE. Satakunta: A soil sample was taken in all of the 9 10x10m subplots (in the 30*30 m plots) and mixed to obtain one representative composite sample from each plot. All 20 plots of area 1 were sampled (1, 2, 3, 5 species mixtures).
Organic (if present; only Satakunta) and mineral (5 cm) soil horizons were samples separately. Kaltenborn: all 16 plots (M: mangament; U: unmanaged. 9 crossing points of the mineral horizon per plot, over subplots M and U, are selected. Whereby respectively 4 and 5 crossing points are randomly selected in those subplots. In which plot (M or U) the 4, either 5 samples are taken, is randomly decided. The nine subsamples are put together in a composite sample.In case of 1 species plots, we randomly select 9 points per plot over the M and U subplot. Whereby respectively 4 and 5 crossing points are randomly selected in those subplots. In which plot (M or U) the 4, either 5 samples are taken, is randomly decided. Soils were sieved fresh (4mm), stored at 4°C and analysed within 2 weeks. There was no upper organic horizon in Germany.

Spatial Extent

Experimental FunDivEurope: Finland (Satakunta), Germany (Kaltenborn-BIOTREE)

Temporal Extent

Soil sampling dates: Finland: 20-21/9/2011; Germany: 10/12/2011;

Data Analysis

Response variables:
Microbial biomass carbon (Cmic) and Nitrogen (Nmic)
Ctot .
Water-content ot.
qmicot.
pHH2O pHKCl ot.
NitPot ot.
NtotCW NtotHW
CCW ClabileCtot.

Planned data analyses: mixed models, strucutural equation modelling

Data columns available in the raw data part of this dataset

Sample
sample number
Data group: Helper
Values
1
13
12
10
11
Richness
Richness
Data group: Species richness
Values
2
3
1
5
4
Site
site name
Data group: Experimental site
Values
Satakunta
Kaltenborn
Species
tree species present
Data group: Species composition
Values
DF
A
B
D
DFO
Plot
plot number
Data group: Experimental plot id
Values
12
1
13
10
11
numfundiv
fundiv plot identity
Data group: Helper
Values
11HNDM001
11HNDM003
11HNDM005
11HNDM004
11HNDM002
horizon
sampling horizon (organic-mineral)
Data group: Soil horizon
Values
Mineral
Organic
DW
coefficient to transform fresh weight into dry weight
Data group: Soil variable
Values
0.33213784034191096
0.24603988969409332
0.34094671433027
0.32348760069499227
0.3656604581460069
LOI
loss on ignition
Unit: %
Data group: Soil variable
Values
29.809477955842933
35.00605510142326
2.849701240998953
3.2594208166727348
25.819229384227526
Cmic
microbial biomass carbon
Unit: mg kg-1
Data group: Microbial biomass
Keywords: C
Values
126.53233183881859
1088.470158626785
1190.4728598046638
1008.0324734165513
1180.772102161101
Nmic
microbial biomass nitrogen
Unit: mg kg-1
Data group: Microbial biomass
Keywords: N
Values
27.15952871212656
131.658482956024
136.29804184563218
342.749894447963
315.58758424673334
Ctot
total organic carbon content
Unit: %
Data group: Microbial biomass
Keywords: C
Values
1.6568030470924144
15.011179874550885
17.3310918347924
20.35235761710654
1.8950121027167064
Water-content
gravimetric water content
Unit: %
Data group: Soil variable
Keywords: water
Values
22.017675210663942
20.500549699281954
18.71477941405395
21.309072368630726
21.101687016497184
qmic
microbial quotient
Unit: mg Cmic.g-1 Ctot
Data group: Microbial biomass
Keywords: C
Values
10.153546924428712
10.982737838652024
0.529069485566242
10.21964267086019
10.88495475862072
pHH2O
pH of soil in water
Data group: Soil variable
Keywords: pH
Values
4.51
4.45
4.48
4.5
4.08
pHKCl
pH of soil in KCl solution
Data group: Soil variable
Keywords: pH
Values
3.02
3.29
2.94
3.18
3.27
Diversity
indicator of metabolic (functional) diversity of bacteria
Unit: %
Data group: Diversity measure
Keywords: diversity
Values
0.41935483870967744
0.3225806451612903
0.2903225806451613
0.1935483870967742
0.3870967741935484
NitPot
potential nitrification
Unit: mg N-NO3 . g-1 dry soil . h-1
Data group: Soil variable
Keywords: nitrification
Values
0.013
0.043
0.02
0
0.018
NtotCW
water soluble nitrogen (cold water nitrogen)
Unit: µg.g-1
Data group: Soil variable
Keywords: N
Values
12.608807007250322
12.179952221385559
13.790710797799175
14.141191258374365
14.41646813237321
NtotHW
hot water nitrogen
Unit: µg.g-1
Data group: Soil variable
Keywords: N
Values
113.383830017617
100.39755129811549
118.9023089106346
1017.0184095920768
114.98318665037671
CCW
water soluble carbon (cold water carbon)
Unit: mg.g-1
Data group: Soil variable
Keywords: C
Values
0.05708738700781367
0.05727143804942774
0.05034259112676617
0.05068896925858952
0.05431803898405186
Clabile
hot water carbon (labile carbon)
Unit: mg.g-1
Data group: Soil variable
Keywords: C
Values
12.191400247658093
1.2504218106908966
11.294842862169078
12.339394656428729
12.627687441627142