Cover of understorey vegetation in biomass subplots in May 2012 in the exploratory region in Germany

Usage Rights

This data is Free within projects.

FunDiv-intern

Dataset Abstract

Most of the plant diversity in European forests is found in the understorey, and despite its relatively low biomass compared to the forest overstorey, its functional importance is high (nectar source for pollinators, habitat for small mammals, affects tree regeneration, invasion resistance, decomposition and nutrient cycling (Gilliam 2007). Relationships between overstorey and understorey diversity and composition is tackled. For each of the plots per focal region, the core plot is divided in nine quadrants.For each of the plots per focal region, the core plot is divided in nine quadrants. In three quadrants (upper right, central, lower left), a vegetation subplot of 5 m x 5 m (as close as possible to the central quadrant; subplot in the central quadrant located in the upper half) is marked for identification and estimation of cover of understorey vascular plant species. Location of subplots exclude major heterogeneities at any scale of sampling (tree trunks, tracks and paths, streams and ponds, peaty pools, boulders and cliffs…). Thus, terricolous plants growing on mineral and organic soil of the undisturbed forest floor are represented. Within this subplot, understorey vegetation is identified (species, cover) and afterwards clipped in a zone of 0.5 m x 0.5 m (biomass subplot), where understorey vegetation is relatively abundant and where vegetation composition is representative for the whole subplot. Then, biomass is divided into 'woody' (woody juveniles, woody plants) and 'non-woody' (seedlings, 'green' herbs). The biomass samples are dried for 24 to 48h at 70°C . Then they are weighed and analysed for P, Ca, K, Mg, C, N (Forest & Nature Lab, Ghent University).

Dataset Design

For each of the plots per focal region, the core plot is divided in nine quadrants. In three quadrants (upper right, central, lower left), a subplot of 5 m x 5 m (as close as possible to the central quadrant; subplot in the central quadrant located in the upper half) is marked for identification and estimation of cover of understorey vascular plant species (species, cover, maximum height, development stage).
Within this subplot, understorey vegetation is identified (species, cover) and afterwards clipped in a zone of 0.5 m x 0.5 m, where understorey vegetation is relatively abundant and where vegetation composition is representative for the whole subplot. Then, biomass is divided into 'woody' (woody juveniles, woody plants) and 'non-woody' (seedlings, 'green' herbs). Preparation of biomass samples for chemical analyses: dried at 70°C, grinded using a sieve of 1mm. Before analyses of Ca, Mg, K en P-content, grinded biomass samples are 'destroyed' with HNO3/HClO4, diluted with demineralised water and filtered according to the method of Varian Instruments at work, AA-24 (McKenzie T., 1982. Automated multielement analysis of plant material by flame atomic absorption spectroscopy. Varian Instruments at work, AA-24).

Analysis for Ca-content: destruction of biomass sample with the above mentioned method. Then the sample is diluted, 10% CsCI is added as modifer on the AAS (Varian SpectrAA 220) and calibrated to 5mg Ca/l and atomized in a nitrous oxide-acetylene flame, absorption is measured at 422.7nm. The analytical quality of the analysis is verified by repeated measurement of blanco and control samples.

Analysis for K-content: destruction of biomass sample with the above mentioned method. Then the sample is diluted, 10% CsCI is added as modifer on the AAS (Varian SpectrAA 220) and calibrated to 1mg K/l and atomized in a air-acetylene flame, absorption is measured at 766.5nm. The analytical quality of the analysis is verified by repeated measurement of blanco and control samples.

Analysis for Mg-content: destruction of biomass sample with the above mentioned method. Then the sample is diluted, 10% CsCI is added as modifer on the AAS (Varian SpectrAA 220) and calibrated to 0.5mg Mg/l and atomized in a air-acetylene flame, absorption is measured at 258.2nm. The analytical quality of the analysis is verified by repeated measurement of blanco and control samples.

Analysis for P-content: destruction of biomass sample with the above mentioned method, then reaction of the destroyed biomass sample with metholsulphite, ammoniumheptamolybdate and sodiumacetate solution. Finally, measurement of the total P-content with a spectrophotometer type Varian Cary 50 at 700nm (Chemical analysis of plants and soils. Cottenie, Verloo,... Laboratory of analytical and agrochemistry, RUG).

Analyses for C,N: analysis is done using an Elementar analyzer, type Vario Macro Cube in configuration CNS, with Argon as carrier gas. Catalytic combustion of the sample (1.5g) is carried out at a permanent temperature of up to 1200°C. This is followed by reduction of the combustion gasses on hot copper in the refuction tube. The formed gasses N2, CO2, H2O, SO2 are separated via purge and trep chromatography and afterwards detected on a thermal conductivity detector (TCD). A connected PC computes the element concentration from the detector signal, and the sample weight on the basis of stored calibration curves.

Spatial Extent

Germany, Hainich region

Temporal Extent

Spring 2012

Taxonomic Extent

understorey vegetation: woody and non-woody vascular species (herbs, seedlings) < 1.3m

Measurement Circumstances

rain showers on certain days

Data columns available in the raw data part of this dataset

plot number
unique number ascribed to each plot
Data group: Exploratory plot id
Values
GER03
GER04
GER05
GER02
GER01
subplot number
Indicates which subplot within the plot is considered
Data group: Sub plot id
Values
10b
10a
11a
10c
11b
* Berger, S. also contributed to this column.
diversity
Number of target tree species present in subplot
Data group: Species richness
Keywords: diversity
Values
1
3
4
2
target Fagus sylvatica
Absence/presence of Fagus sylvatica in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
target Fraxinus excelsior
Absence/presence of Fraxinus excelsior in overstorey as target tree speciesv; Datagroup description: Presence data
Data group: Presence data
Values
0
1
target Quercus spp.
Absence/presence of Quercus spp. (mainly petraea) in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
target Picea abies
Absence/presence of Picea abies in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
target Acer pseudoplatanus
Absence/presence of Acer pseudoplatanus in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
Acer campestre
% cover by Acer campestre
Unit: %
Data group: Species composition
Values
1
0
* Berger, S. also contributed to this column.
Acer platanoides
% cover by Acer platanoides
Unit: %
Data group: Species composition
Values
10
15
0
0.1
1
* Berger, S. also contributed to this column.
Acer pseudoplatanus
% cover by Acer pseudoplatanus
Unit: %
Data group: Species composition
Values
0.1
15
1
2
0
* Berger, S. also contributed to this column.
Actaea spicata
% cover by Actaea spicata
Unit: %
Data group: Species composition
Values
0
5
* Berger, S. also contributed to this column.
Aegopodium podagraria
% cover by Aegopodium podagraria
Unit: %
Data group: Species composition
Values
10
1
15
0.1
0
* Berger, S. also contributed to this column.
Alliaria petiolata
% cover by Alliaria petiolata
Unit: %
Data group: Species composition
Values
25
1
0
0.1
3
* Berger, S. also contributed to this column.
Allium ursinum
% cover by Allium ursinum
Unit: %
Data group: Species composition
Values
1
0
100
10
0.1
* Berger, S. also contributed to this column.
Anemone nemorosa
% cover by Anemone nemorosa
Unit: %
Data group: Species composition
Values
10
0
2
1
15
* Berger, S. also contributed to this column.
Anemone ranunculoides
% cover by Anemone ranunculoides
Unit: %
Data group: Species composition
Values
25
1
2
0
3
* Berger, S. also contributed to this column.
Arctium sp.
% cover by Arctium sp.
Unit: %
Data group: Species composition
Values
0
2
* Berger, S. also contributed to this column.
Arum maculatum
% cover by Arum maculatum
Unit: %
Data group: Species composition
Values
0.1
1
5
0
* Berger, S. also contributed to this column.
Asarum europaeum
% cover by Asarum europaeum
Unit: %
Data group: Species composition
Values
25
2
1
0
3
* Berger, S. also contributed to this column.
Betula pendula
% cover by Betula pendula
Unit: %
Data group: Species composition
Values
0.1
0
* Berger, S. also contributed to this column.
Brachypodium sylvaticum
% cover by Brachypodium sylvaticum
Unit: %
Data group: Species composition
Values
2
0
0.1
1
* Berger, S. also contributed to this column.
Carex sylvatica
% cover by Carex sylvatica
Unit: %
Data group: Species composition
Values
0.1
0
* Berger, S. also contributed to this column.
Carpinus betulus
% cover by Carpinus betulus
Unit: %
Data group: Species composition
Values
1
0
0.1
10
30
* Berger, S. also contributed to this column.
Chaerophyllum sp.
% cover by Chaerophyllum sp.
Unit: %
Data group: Species composition
Values
0
5
0.1
6
* Berger, S. also contributed to this column.
Convallaria majalis
% cover by Convallaria majalis
Unit: %
Data group: Species composition
Values
6
0
5
1
* Berger, S. also contributed to this column.
Cornus sp.
% cover by Cornus sp.
Unit: %
Data group: Species composition
Values
1
0.1
0
* Berger, S. also contributed to this column.
Corydalis cava
% cover by Corydalis cava
Unit: %
Data group: Species composition
Values
0
40
20
25
* Berger, S. also contributed to this column.
Crataegus sp.
% cover by Crataegus sp.
Unit: %
Data group: Species composition
Values
1
0
* Berger, S. also contributed to this column.
Dactylis glomerata
% cover by Dactylis glomerata
Unit: %
Data group: Species composition
Values
1
2
4
0
* Berger, S. also contributed to this column.
Dentaria bulbifera
% cover by Dentaria bulbifera
Unit: %
Data group: Species composition
Values
2
20
1
0
15
* Berger, S. also contributed to this column.
Dryopteris filix-mas
% cover by Dryopteris filix-mas
Unit: %
Data group: Species composition
Values
5
0
* Berger, S. also contributed to this column.
Euonymus europaeus
% cover by Euonymus europaeus
Unit: %
Data group: Species composition
Values
0
10
* Berger, S. also contributed to this column.
Fagus sylvatica
% cover by Fagus sylvatica
Unit: %
Data group: Species composition
Values
0
1
10
15
0.1
* Berger, S. also contributed to this column.
Filipendula ulmaria
% cover by Filipendula ulmaria
Unit: %
Data group: Species composition
Values
0
0.1
* Berger, S. also contributed to this column.
Fragaria sp
% cover by Fragaria sp
Unit: %
Data group: Species composition
Values
1
3
0
* Berger, S. also contributed to this column.
Fraxinus excelsior
% cover by Fraxinus excelsior
Unit: %
Data group: Species composition
Values
2
10
0.1
0
1
* Berger, S. also contributed to this column.
Galeobdolon luteum
% cover by Galeobdolon luteum
Unit: %
Data group: Species composition
Values
0
2
0.1
20
1
* Berger, S. also contributed to this column.
Galium aparine
% cover by Galium aparine
Unit: %
Data group: Species composition
Values
0.1
1
0
2
* Berger, S. also contributed to this column.
Galium odoratum
% cover by Galium odoratum
Unit: %
Data group: Species composition
Values
10
2
0
1
* Berger, S. also contributed to this column.
Geranium robertianum
% cover by Geranium robertianum
Unit: %
Data group: Species composition
Values
0.1
0
10
2
1
* Berger, S. also contributed to this column.
Geum urbanum
% cover by Geum urbanum
Unit: %
Data group: Species composition
Values
0
6
3
0.1
1
* Berger, S. also contributed to this column.
Glechoma hederacea
% cover by Glechoma hederacea
Unit: %
Data group: Species composition
Values
1
0
2
5
* Berger, S. also contributed to this column.
Hedera helix
% cover by Hedera helix
Unit: %
Data group: Species composition
Values
0
0.1
* Berger, S. also contributed to this column.
Hepatica nobilis
% cover by Hepatica nobilis
Unit: %
Data group: Species composition
Values
5
0
* Berger, S. also contributed to this column.
Hordelymus europaeus
% cover by Hordelymus europaeus
Unit: %
Data group: Species composition
Values
1
0
0.1
* Berger, S. also contributed to this column.
Melica uniflora
% cover by Melica uniflora
Unit: %
Data group: Species composition
Values
2
0
* Berger, S. also contributed to this column.
Mercurialis perrenis
% cover by Mercurialis perrenis
Unit: %
Data group: Species composition
Values
1
10
0
15
0.1
* Berger, S. also contributed to this column.
Milium effusum
% cover by Milium effusum
Unit: %
Data group: Species composition
Values
0
0.1
15
1
* Berger, S. also contributed to this column.
Myosotis sylvatica
% cover by Myosotis sylvatica
Unit: %
Data group: Species composition
Values
0.1
2
0
* Berger, S. also contributed to this column.
Oxalis acetosella
% cover by Oxalis acetosella
Unit: %
Data group: Species composition
Values
0.1
2
0
1
* Berger, S. also contributed to this column.
Paris quadrifolia
% cover by Paris quadrifolia
Unit: %
Data group: Species composition
Values
0
2
0.1
6
* Berger, S. also contributed to this column.
Polygonatum multiflorum
% cover by Polygonatum multiflorum
Unit: %
Data group: Species composition
Values
3
0
* Berger, S. also contributed to this column.
Primula veris
% cover by Primula veris
Unit: %
Data group: Species composition
Values
0
2
* Berger, S. also contributed to this column.
Prunus avium
% cover by Prunus avium
Unit: %
Data group: Species composition
Values
2
15
0
* Berger, S. also contributed to this column.
Prunus spinosa
% cover by Prunus spinosa
Unit: %
Data group: Species composition
Values
0
20
* Berger, S. also contributed to this column.
Pulmonaria officinalis
% cover by Pulmonaria officinalis
Unit: %
Data group: Species composition
Values
4
0
* Berger, S. also contributed to this column.
Ranunculus acris
% cover by Ranunculus acris
Unit: %
Data group: Species composition
Values
3
1
2
0.1
0
* Berger, S. also contributed to this column.
Ranunculus ficaria
% cover by Ranunculus ficaria
Unit: %
Data group: Species composition
Values
0
0.1
1
15
10
* Berger, S. also contributed to this column.
Ranunculus lanuginosus
% cover by Ranunculus lanuginosus
Unit: %
Data group: Species composition
Values
0
1
* Berger, S. also contributed to this column.
Rosa sp.
% cover by Rosa sp.
Unit: %
Data group: Species composition
Values
0
2
* Berger, S. also contributed to this column.
Rubus caesius
% cover by Rubus caesius
Unit: %
Data group: Species composition
Values
1
0.1
0
* Berger, S. also contributed to this column.
Rubus idaeus
% cover by Rubus idaeus
Unit: %
Data group: Species composition
Values
0.1
1
0
* Berger, S. also contributed to this column.
Sambucus nigra
% cover by Sambucus nigra
Unit: %
Data group: Species composition
Values
2
0
0.1
1
* Berger, S. also contributed to this column.
Sanicula europaea
% cover by Sanicula europaea
Unit: %
Data group: Species composition
Values
0
5
* Berger, S. also contributed to this column.
Senecio ovatus
% cover by Senecio ovatus
Unit: %
Data group: Species composition
Values
0
5
* Berger, S. also contributed to this column.
Sorbus aucuparia
% cover by Sorbus aucuparia
Unit: %
Data group: Species composition
Values
0
1
* Berger, S. also contributed to this column.
Species 1
% cover by Species 1
Unit: %
Data group: Species composition
Values
0
2
* Berger, S. also contributed to this column.
Stachys sylvatica
% cover by Stachys sylvatica
Unit: %
Data group: Species composition
Values
1
4
0
0.1
* Berger, S. also contributed to this column.
Stellaria holostea
% cover by Stellaria holostea
Unit: %
Data group: Species composition
Values
0.1
25
0
15
2
* Berger, S. also contributed to this column.
Stellaria media
% cover by Stellaria media
Unit: %
Data group: Species composition
Values
0
0.1
* Berger, S. also contributed to this column.
Tilia platyphyllos
% cover by Tilia platyphyllos
Unit: %
Data group: Species composition
Values
25
0
30
* Berger, S. also contributed to this column.
Urtica dioica
% cover by Urtica dioica
Unit: %
Data group: Species composition
Values
2
1
0
25
* Berger, S. also contributed to this column.
Valeriana officinalis
% cover by Valeriana officinalis
Unit: %
Data group: Species composition
Values
0
0.1
* Berger, S. also contributed to this column.
Veronica chamaedrys
% cover by Veronica chamaedrys
Unit: %
Data group: Species composition
Values
0.1
0
* Berger, S. also contributed to this column.
Viola odorata
% cover by Viola odorata
Unit: %
Data group: Species composition
Values
0
0.1
* Berger, S. also contributed to this column.
Viola reichenbachiana
% cover by Viola reichenbachiana
Unit: %
Data group: Species composition
Values
0.1
0
1
2
* Berger, S. also contributed to this column.
Viola riviniana
% cover by Viola riviniana
Unit: %
Data group: Species composition
Values
0
1
4
20
* Berger, S. also contributed to this column.
Remarks
Remarks about plot/subplot
Data group: Helper
Values
dead tree in the subplot, about 5% of cover
big dead spruce across the subplot, big gap at northern end of plot --> light!
dead tree across the subplot
high pig activity
2m² bare soil, caused by earthworm sampling
* Berger, S. also contributed to this column.