Cover of understorey vegetation in biomass subplots in May-June 2012 in the exploratory region in Italy

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

Italy

Temporal Extent

Spring 2012

Taxonomic Extent

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

Measurement Circumstances

Heavy rain on several 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
ITA01
ITA04
ITA02
ITA03
ITA05
subplot number
Indicates which subplot within the plot is considered
Data group: Sub plot id
Values
10c
11b
11a
10a
10b
diversity
Number of target tree species present in subplot
Data group: Species richness
Keywords: diversity
Values
4
3
5
2
1
target Castanea sativa
Absence/presence of Castanea sativa in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
target Ostrya carpinifolia
Absence/presence of Ostrya carpinifolia in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
target Quercus cerris
Absence/presence of Quercus cerris in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
target Quercus illex
Absence/presence of Quercus illex in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
target Quercus petraea
Absence/presence of Quercus petraea in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
Allium pendulinum
% cover by Allium pendulinum
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Anemone nemorosa
% cover by Anemone nemorosa
Unit: %
Data group: Species composition
Values
5
1
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Arbutus unedo
% cover by Arbutus unedo
Unit: %
Data group: Species composition
Values
1
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Asphodelus albus
% cover by Asphodelus albus
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Asplenium onopteris
% cover by Asplenium onopteris
Unit: %
Data group: Species composition
Values
0
2
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Brachypodium pinnatum
% cover by Brachypodium pinnatum
Unit: %
Data group: Species composition
Values
0
4
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Brachypodium sylvaticum
% cover by Brachypodium sylvaticum
Unit: %
Data group: Species composition
Values
1
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Calamintha sylvatica ssp. ascendens
% cover by Calamintha sylvatica ssp. ascendens
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Castanea sativa
% cover by Castanea sativa
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Cephalanthera damasonium
% cover by Cephalanthera damasonium
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Coronilla emerus
% cover by Coronilla emerus
Unit: %
Data group: Species composition
Values
0.1
0
2
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Corylus avellana
% cover by Corylus avellana
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Crataegus monogyna
% cover by Crataegus monogyna
Unit: %
Data group: Species composition
Values
1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Crocus etruscus
% cover by Crocus etruscus
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Crocus vernus
% cover by Crocus vernus
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Cruciata glabra
% cover by Cruciata glabra
Unit: %
Data group: Species composition
Values
0
0.1
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Cyclamen hederifolium
% cover by Cyclamen hederifolium
Unit: %
Data group: Species composition
Values
3
0.1
15
0
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Cyclamen repandum
% cover by Cyclamen repandum
Unit: %
Data group: Species composition
Values
0.1
1
3
2
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Cytisus scoparius
% cover by Cytisus scoparius
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Dactylis glomerata
% cover by Dactylis glomerata
Unit: %
Data group: Species composition
Values
1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Daphne laureola
% cover by Daphne laureola
Unit: %
Data group: Species composition
Values
0
2
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Deschampsia flexuosa
% cover by Deschampsia flexuosa
Unit: %
Data group: Species composition
Values
1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Erica arborea
% cover by Erica arborea
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Erica scoparia
% cover by Erica scoparia
Unit: %
Data group: Species composition
Values
0
2
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Euonymus europaeus
% cover by Euonymus europaeus
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Festuca heterophylla
% cover by Festuca heterophylla
Unit: %
Data group: Species composition
Values
0
1
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Fraxinus ornus
% cover by Fraxinus ornus
Unit: %
Data group: Species composition
Values
1
0
10
3
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Geranium robertianum
% cover by Geranium robertianum
Unit: %
Data group: Species composition
Values
3
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Hedera helix
% cover by Hedera helix
Unit: %
Data group: Species composition
Values
25
2
1
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Hieracium murorum
% cover by Hieracium murorum
Unit: %
Data group: Species composition
Values
0
1
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Ilex aquifolium
% cover by Ilex aquifolium
Unit: %
Data group: Species composition
Values
15
0
1
0.1
10
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Juniperus communis
% cover by Juniperus communis
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Lathyrus venetus
% cover by Lathyrus venetus
Unit: %
Data group: Species composition
Values
10
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Lilium bulbiferum
% cover by Lilium bulbiferum
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Luzula forsteri
% cover by Luzula forsteri
Unit: %
Data group: Species composition
Values
0
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Melica uniflora
% cover by Melica uniflora
Unit: %
Data group: Species composition
Values
0
0.1
5
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Moehringia pentandra
% cover by Moehringia pentandra
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Moehringia trinerva
% cover by Moehringia trinerva
Unit: %
Data group: Species composition
Values
0.1
12
2
1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Ostrya carpinifolia
% cover by Ostrya carpinifolia
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Phyllirea latifolia
% cover by Phyllirea latifolia
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Physospermum cornubiense
% cover by Physospermum cornubiense
Unit: %
Data group: Species composition
Values
5
7
2
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Poa nemoralis
% cover by Poa nemoralis
Unit: %
Data group: Species composition
Values
0
1
10
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Primula vulgaris
% cover by Primula vulgaris
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Prunus avium
% cover by Prunus avium
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Pteridium aquilinum
% cover by Pteridium aquilinum
Unit: %
Data group: Species composition
Values
1
15
2
10
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Quercus cerris
% cover by Quercus cerris
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Quercus ilex
% cover by Quercus ilex
Unit: %
Data group: Species composition
Values
1
0.1
10
0
12
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Quercus petraea
% cover by Quercus petraea
Unit: %
Data group: Species composition
Values
0.1
5
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Rosa sempervirens
% cover by Rosa sempervirens
Unit: %
Data group: Species composition
Values
1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Rubia peregrina
% cover by Rubia peregrina
Unit: %
Data group: Species composition
Values
1
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Rubus hirtus
% cover by Rubus hirtus
Unit: %
Data group: Species composition
Values
5
0
10
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Rubus ulmifolius
% cover by Rubus ulmifolius
Unit: %
Data group: Species composition
Values
0
10
6
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Ruscus aculeatus
% cover by Ruscus aculeatus
Unit: %
Data group: Species composition
Values
3
0.1
2
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Sanicula europaea
% cover by Sanicula europaea
Unit: %
Data group: Species composition
Values
0
2
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Scilla bifolia
% cover by Scilla bifolia
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Serratula tinctoria
% cover by Serratula tinctoria
Unit: %
Data group: Species composition
Values
0
1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Smilax aspera
% cover by Smilax aspera
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Solidago virgaurea
% cover by Solidago virgaurea
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Sorbus torminalis
% cover by Sorbus torminalis
Unit: %
Data group: Species composition
Values
0.1
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Symphytum tuberosum
% cover by Symphytum tuberosum
Unit: %
Data group: Species composition
Values
1
3
0
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Vicia tenuissima
% cover by Vicia tenuissima
Unit: %
Data group: Species composition
Values
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Viola alba
% cover by Viola alba
Unit: %
Data group: Species composition
Values
1
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Viola reichenbachiana
% cover by Viola reichenbachiana
Unit: %
Data group: Species composition
Values
1
5
0
0.1
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.
Remarks
Remarks about plot/subplot
Data group: Helper
Values
chestnut crowns damaged (open canopy)
disturbance by animals (wild boar) on the understorey
disturbance by ungulates
chestnut attacked by parasites, small canopy gap
chestnut canopy damaged by parasite attacks --> gap
* Selvi, F., These persons could not be matched within the portal: Andrea Coppi Coppi also contributed to this column.