Cover of understorey vegetation in vegetation subplots in August 2012 in the exploratory region in Finland

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 woody fraction is further divided into 'woody-woody' (woody part) and 'woody-leaf' ('green' part).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). The woody fraction is further divided into 'woody-woody' (woody part) and 'woody-leaf' ('green' part).

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

Finland

Temporal Extent

Summer 2012

Taxonomic Extent

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

Measurement Circumstances

overall dry weather

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
FIN04
FIN02
FIN03
FIN01
FIN05
subplot number
Indicates which subplot within the plot is considered
Data group: Sub plot id
Values
10b
10a
11a
10c
11b
diversity
Number of target tree species present in subplot
Data group: Species richness
Keywords: diversity
Values
1
3
2
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 Pinus sylvestris
Absence/presence of Pinus sylvestris in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
1
0
target Betula pendula
Absence/presence of Betula pendula in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
cover tree layer
Total % of soil covered by the tree layer
Data group: Plot descriptor
Values
20
43
30
35
40
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
cover shrub layer
Total % of soil covered by the shrub layer
Data group: Plot descriptor
Values
0.1
1
10
12
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
cover understorey layer
Total % of soil covered by the understorey vegetation
Data group: Plot descriptor
Values
101.29999999999994
0.8999999999999999
103.89999999999995
109.29999999999997
11.799999999999997
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
cover mosses
Total % of soil covered by the mosses
Data group: Plot descriptor
Values
1
15
0.1
0
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
cover litter
Total % of soil covered by the litter
Data group: Plot descriptor
Values
1
10
2
15
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
cover bare soil
Total % of soil covered by the bare soil
Data group: Plot descriptor
Values
0.1
0
5
1
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
number species
Total number of species recorded in the understorey vegetation
Data group: Understorey species richness
Keywords: diversity
Values
14
11
10
12
13
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Agrostis gigantea
% cover by Agrostis gigantea
Unit: %
Data group: Species composition
Values
0
0.1
Alnus incana
% cover by Alnus incana
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Angelica sylvestris
% cover by Angelica sylvestris
Unit: %
Data group: Species composition
Values
1
3
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Betula sp.
% cover by Betula sp.
Unit: %
Data group: Species composition
Values
2
0
1
0.1
5
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Calamagrostis arundinacea
% cover by Calamagrostis arundinacea
Unit: %
Data group: Species composition
Values
0
0.1
1
10
15
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Calluna vulgaris
% cover by Calluna vulgaris
Unit: %
Data group: Species composition
Values
0.1
5
0
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Carex pilulifera
% cover by Carex pilulifera
Unit: %
Data group: Species composition
Values
0.1
1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Convallaria majalis
% cover by Convallaria majalis
Unit: %
Data group: Species composition
Values
1
4
2
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Crepis sp.
% cover by Crepis sp.
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Deschampsia cespitosa
% cover by Deschampsia cespitosa
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Deschampsia flexuosa
% cover by Deschampsia flexuosa
Unit: %
Data group: Species composition
Values
0
10
1
0.1
15
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Dryopteris carthusiana
% cover by Dryopteris carthusiana
Unit: %
Data group: Species composition
Values
0
15
1
0.1
2
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Epilobium angustifolium
% cover by Epilobium angustifolium
Unit: %
Data group: Species composition
Values
1
0.1
3
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Equisetum sylvaticum
% cover by Equisetum sylvaticum
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Fragaria vesca
% cover by Fragaria vesca
Unit: %
Data group: Species composition
Values
2
1
0.1
4
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Frangula alnus
% cover by Frangula alnus
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Galeopsis sp.
% cover by Galeopsis sp.
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Galium sp.
% cover by Gallium sp.
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Geranium sylvaticum
% cover by Geranium sylvaticum
Unit: %
Data group: Species composition
Values
1
0.1
2
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Grass 1
Grass 1
Data group: Species composition
Values
0.1
4
0
8
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Gymnocarpium dryopteris
% cover by Gymnocarpium dryopteris
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Hieracium umbellatum
% cover by Hieracium umbellatum
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Juniperus communis
% cover by Juniperus communis
Unit: %
Data group: Species composition
Values
0.1
0
2
3
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Lathyrus pratensis
% cover by Lathyrus pratensis
Unit: %
Data group: Species composition
Values
0
1
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Linnaea borealis
% cover by Linnaea borealis
Unit: %
Data group: Species composition
Values
15
0
0.1
10
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Luzula pilosa
% cover by Luzula pilosa
Unit: %
Data group: Species composition
Values
1
0.1
2
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Lycopodium annotinum
% cover by Lycopodium annotinum
Unit: %
Data group: Species composition
Values
0
0.1
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Maianthemum bifolium
% cover by Maianthemum bifolium
Unit: %
Data group: Species composition
Values
1
0
3
0.1
2
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Melampyrum sp.
% cover by Melampyrum sp.
Unit: %
Data group: Species composition
Values
2
1
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Melica nutans
% cover by Melica nutans
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Orthilia secunda
% cover by Orthilia secunda
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Oxalis acetosella
% cover by Oxalis acetosella
Unit: %
Data group: Species composition
Values
2
20
0
1
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Peucedanum palustre
% cover by Peucedanum palustre
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Picea abies
% cover by Picea abies
Unit: %
Data group: Species composition
Values
1
0
0.1
16
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Picris hieracioides
% cover by Picris hieracioides
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pinus sylvestris
% cover by Pinus sylvestris
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Platanthera chlorantha
% cover by Platanthera chlorantha
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Populus tremula
% cover by Populus tremula
Unit: %
Data group: Species composition
Values
1
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Potentilla erecta
% cover by Potentilla erecta
Unit: %
Data group: Species composition
Values
1
0.1
2
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pteridium aquilinum
% cover by Pteridium aquilinum
Unit: %
Data group: Species composition
Values
12
0
1
20
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pyrola minor
% cover by Pyrola minor
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rubus idaeus
% cover by Rubus idaeus
Unit: %
Data group: Species composition
Values
0.1
10
0
2
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rubus saxatilis
% cover by Rubus saxatilis
Unit: %
Data group: Species composition
Values
0
0.1
1
10
2
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rumex acetosella
% cover by Rumex acetosella
Unit: %
Data group: Species composition
Values
0
5
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Salix sp.
% cover by Salix sp.
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Solidago virgaurea
% cover by Solidago virgaurea
Unit: %
Data group: Species composition
Values
1
0.1
0
2
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Sorbus aucuparia
% cover by Sorbus aucuparia
Unit: %
Data group: Species composition
Values
0
1
0.1
2
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Stellaria graminea
% cover by Stellaria graminea
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Succisa pratensis
% cover by Succisa pratensis
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Trientalis europaea
% cover by Trientalis europaea
Unit: %
Data group: Species composition
Values
0.1
1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Vaccinium myrtillus
% cover by Vaccinium myrtillus
Unit: %
Data group: Species composition
Values
10
0
0.1
12
1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Vaccinium vitis-idaea
% cover by Vaccinium vitis-idaea
Unit: %
Data group: Species composition
Values
1
0
10
15
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Veronica chamaedrys
% cover by Veronica chamaedrys
Unit: %
Data group: Species composition
Values
1
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Veronica officinalis
% cover by Veronica officinalis
Unit: %
Data group: Species composition
Values
0
1
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Viola canina
% cover by Viola canina
Unit: %
Data group: Species composition
Values
0
0.1
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Viola riviniana
% cover by Viola riviniana
Unit: %
Data group: Species composition
Values
0.1
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.