Maximum height 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
FIN05
FIN04
FIN01
FIN03
FIN02
subplot number
Indicates which subplot within the plot is considered
Data group: Sub plot id
Values
11b
11a
10b
10a
10c
diversity
Number of target tree species present in subplot
Data group: Species richness
Keywords: diversity
Values
3
1
2
target Picea abies
Absence/presence of Picea abies in overstorey as target tree species; Datagroup description: Presence data
Data group: Presence data
Values
0
1
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
1
0
cover tree layer
Total % of soil covered by the tree layer
Data group: Plot descriptor
Values
40
30
20
35
43
* 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
12
0
10
1
* 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
103.89999999999995
109.29999999999997
11.799999999999997
0.8999999999999999
* 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
15
0.1
0
1
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
10
2
15
0.1
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
1
0.1
10
0
5
* 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
11
10
13
12
14
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Agrostis gigantea
Maximum height of Agrostis gigantea
Unit: cm
Data group: Species composition
Values
0
100
Alnus incana
Maximum height of Alnus incana
Unit: cm
Data group: Species composition
Values
60
0
30
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Angelica sylvestris
Maximum height of Angelica sylvestris
Unit: cm
Data group: Species composition
Values
30
0
20
10
100
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Betula sp.
Maximum height of Betula sp.
Unit: cm
Data group: Species composition
Values
110
0
10
120
100
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Calamagrostis arundinacea
Maximum height of Calamagrostis arundinacea
Unit: cm
Data group: Species composition
Values
120
110
140
0
100
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Calluna vulgaris
Maximum height of Calluna vulgaris
Unit: cm
Data group: Species composition
Values
30
40
0
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Carex pilulifera
Maximum height of Carex pilulifera
Unit: cm
Data group: Species composition
Values
50
15
30
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Convallaria majalis
Maximum height of Convallaria majalis
Unit: cm
Data group: Species composition
Values
0
15
20
30
25
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Crepis sp.
Maximum height of Crepis sp.
Unit: cm
Data group: Species composition
Values
0
5
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Deschampsia cespitosa
Maximum height of Deschampsia cespitosa
Unit: cm
Data group: Species composition
Values
15
25
0
70
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Deschampsia flexuosa
Maximum height of Deschampsia flexuosa
Unit: cm
Data group: Species composition
Values
10
100
15
0
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Dryopteris carthusiana
Maximum height of Dryopteris carthusiana
Unit: cm
Data group: Species composition
Values
0
15
10
25
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Epilobium angustifolium
Maximum height of Epilobium angustifolium
Unit: cm
Data group: Species composition
Values
0
40
100
30
50
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Equisetum sylvaticum
Maximum height of Equisetum sylvaticum
Unit: cm
Data group: Species composition
Values
10
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Fragaria vesca
Maximum height of Fragaria vesca
Unit: cm
Data group: Species composition
Values
5
15
10
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Frangula alnus
Maximum height of Frangula alnus
Unit: cm
Data group: Species composition
Values
5
60
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Galeopsis sp.
Maximum height of Galeopsis sp.
Unit: cm
Data group: Species composition
Values
30
0
5
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Galium sp.
Maximum height of Galium sp.
Unit: cm
Data group: Species composition
Values
40
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Geranium sylvaticum
Maximum height of Geranium sylvaticum
Unit: cm
Data group: Species composition
Values
10
30
25
20
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Grass 1
Maximum height of Grass 1
Unit: cm
Data group: Species composition
Values
0
30
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Gymnocarpium dryopteris
Maximum height of Gymnocarpium dryopteris
Unit: cm
Data group: Species composition
Values
25
15
0
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Hieracium umbellatum
Maximum height of Hieracium umbellatum
Unit: cm
Data group: Species composition
Values
0
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Juniperus communis
Maximum height of Juniperus communis
Unit: cm
Data group: Species composition
Values
110
50
0
100
25
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Lathyrus pratensis
Maximum height of Lathyrus pratensis
Unit: cm
Data group: Species composition
Values
0
70
40
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Linnaea borealis
Maximum height of Linnaea borealis
Unit: cm
Data group: Species composition
Values
10
5
15
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Luzula pilosa
Maximum height of Luzula pilosa
Unit: cm
Data group: Species composition
Values
20
0
15
10
25
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Lycopodium annotinum
Maximum height of Lycopodium annotinum
Unit: cm
Data group: Species composition
Values
0
20
15
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Maianthemum bifolium
Maximum height of Maianthemum bifolium
Unit: cm
Data group: Species composition
Values
20
5
15
10
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Melampyrum sp.
Maximum height of Melampyrum sp.
Unit: cm
Data group: Species composition
Values
15
25
0
10
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Melica nutans
Maximum height of Melica nutans
Unit: cm
Data group: Species composition
Values
40
50
100
0
60
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Orthilia secunda
Maximum height of Orthilia secunda
Unit: cm
Data group: Species composition
Values
25
15
5
10
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Oxalis acetosella
Maximum height of Oxalis acetosella
Unit: cm
Data group: Species composition
Values
5
20
15
0
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Peucedanum palustre
Maximum height of Peucedanum palustre
Unit: cm
Data group: Species composition
Values
10
0
5
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Picea abies
Maximum height of Picea abies
Unit: cm
Data group: Species composition
Values
120
15
10
100
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Picris hieracioides
Maximum height of Picris hieracioides
Unit: cm
Data group: Species composition
Values
40
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pinus sylvestris
Maximum height of Pinus sylvestris
Unit: cm
Data group: Species composition
Values
0
40
10
20
30
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Platanthera chlorantha
Maximum height of Platanthera chlorantha
Unit: cm
Data group: Species composition
Values
0
20
15
40
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Populus tremula
Maximum height of Populus tremula
Unit: cm
Data group: Species composition
Values
0
100
110
140
120
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Potentilla erecta
Maximum height of Potentilla erecta
Unit: cm
Data group: Species composition
Values
0
25
40
30
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pteridium aquilinum
Maximum height of Pteridium aquilinum
Unit: cm
Data group: Species composition
Values
50
60
70
100
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Pyrola minor
Maximum height of Pyrola minor
Unit: cm
Data group: Species composition
Values
0
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rubus idaeus
Maximum height of Rubus idaeus
Unit: cm
Data group: Species composition
Values
50
30
60
0
70
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rubus saxatilis
Maximum height of Rubus saxatilis
Unit: cm
Data group: Species composition
Values
20
0
15
25
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Rumex acetosella
Maximum height of Rumex acetosella
Unit: cm
Data group: Species composition
Values
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Salix sp.
Maximum height of Salix sp.
Unit: cm
Data group: Species composition
Values
0
100
40
50
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Solidago virgaurea
Maximum height of Solidago virgaurea
Unit: cm
Data group: Species composition
Values
10
0
100
20
15
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Sorbus aucuparia
Maximum height of Sorbus aucuparia
Unit: cm
Data group: Species composition
Values
0
20
100
10
15
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Stellaria graminea
Maximum height of Stellaria graminea
Unit: cm
Data group: Species composition
Values
0
30
25
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Succisa pratensis
Maximum height of Succisa pratensis
Unit: cm
Data group: Species composition
Values
25
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Trientalis europaea
Maximum height of Trientalis europaea
Unit: cm
Data group: Species composition
Values
25
20
15
0
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Vaccinium myrtillus
Maximum height of Vaccinium myrtillus
Unit: cm
Data group: Species composition
Values
10
15
0
25
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Vaccinium vitis-idaea
Maximum height of Vaccinium vitis-idaea
Unit: cm
Data group: Species composition
Values
15
10
20
25
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Veronica chamaedrys
Maximum height of Veronica chamaedrys
Unit: cm
Data group: Species composition
Values
10
15
0
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Veronica officinalis
Maximum height of Veronica officinalis
Unit: cm
Data group: Species composition
Values
15
10
25
20
0
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Viola canina
Maximum height of Viola canina
Unit: cm
Data group: Species composition
Values
0
17
10
15
20
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.
Viola riviniana
Maximum height of Viola riviniana
Unit: cm
Data group: Species composition
Values
0
15
5
10
* These persons could not be matched within the portal: Maxime Eeraerts also contributed to this column.