Satakunta Finland Earthworm data

Usage Rights

This data is Free within projects.

Dataset Abstract

The earthworm sampling records the abundance, biomass and species diversity of earthworms in the Satakunta site. Hereby all 13 plots where sampled. In every plot, four samples are taken, one in every corner subplot. Sampling locations were, per subplot, located randomly on a 'crossing point' of respectively 2,3 or 4 species. At each sampling point earthworms were sampled. First (if present), a central litter sample (25x25cm) is taken followed by the 'mustard extraction method' over an area of 0,5 m² (0.5x1m) and a final soil sample (25x25x20cm) (length, width, depth) in the middle of this location. Litter and soil samples were taken to the lab for further handsorting, whereby the pit left after sampling was levelled off with surrounding soil. Sampled earthworms are stored in 70% ethanol solution.

Dataset Design

13 plots where sampled. In every plot, four samples are taken, one in every corner subplot. In principle, within every subplot, the samples are taken randomly, but samples are not taken close to tree stems. Sampling locations were, per subplot, located randomly on a 'crossing point' of respectively 2,3 or 4 species. At each sampling point earthworms were sampled. First (if present), a central litter sample (25x25cm) is taken followed by the 'mustard extraction method' over an area of 0,5 m² (0.5x1m) and a final soil sample (25x25x20cm) (length, width, depth) in the middle of this location. When no litter is present, no litter sample could be taken and only a mustard extraction and soil sample is carried out. Samplings that are not carried out are indicated with ‘NA’ in the ‘Time’ column. Litter and soil samples were taken to the lab for further handsorting, whereby the pit left after sampling was levelled off with surrounding soil. Sampled earthworms are stored in 70% ethanol solution.

Spatial Extent

Satakunta Finland

Temporal Extent

Autumn 2011

Taxonomic Extent

Earthworms

Data Analysis

Variables of interest are: Species, Biomass (g), Number (m²), Biomass (g/m²). Number (m²) and Biomass (g/m²) are scaled up numbers of the original caught individual and biomass in a particular sampling method. Attention! Corrections for slope of the sampled area however are not included.

Data columns available in the raw data part of this dataset

Date
Data of sampling
Data group: Survey date
Values
2011-09-12
2011-09-17
2011-09-16
2011-09-13
2011-09-15
Time
Time of sampling
Data group: Survey time
Values
1899-12-30 09:49:00
1899-12-30 09:35:00
1899-12-30 09:45:00
1899-12-30 09:25:00
1899-12-30 09:30:00
PlotID
Unique plot id; Datagroup description: Satakunta Plot Id
Data group: Satakunta Plot Id
Values
15
21
17
18
22
Subsample
Subsample number (1, 2, 3 or 4): 4 samples are taken per plot, 2 are taken in the unmanaged and 2 in the managed subplot.
Data group: Satakunta subplot id
Values
4
3
2
1
Name sampler
Name of person who sampled the earthworms
Data group: Helper
Values
Ilkka Jussila
Hans De Wandeler
Eric Van Beek
Sam Ottoy
Hans Nickmans
Sampling method
Method of sampling: L=Litter sample; M=Mustard extraction; S=Soil sample
Data group: Sampling method
Values
M
S
L
Slope Length
Slope Length
Data group: Topography
Values
8
6
10
0
Slope Width
Slope Width
Data group: Topography
Values
10
8
0
6
Sample code
Sample point code (year/sampling responsible/country/chronological number of sampling action)
Data group: Sample code
Values
11HWFE002
11HWFE003
11HWFE001
11HWFE005
11HWFE004
Date on formol
Date on which the earthworm fixation in a 5% formaldehyde solution started
Data group: Fixation moment
Values
2011-09-26
2011-09-30
2011-09-28
2011-09-27
2011-09-29
Date back on ethanol
Date on which the earthworm is transferred from formaldehyde solution to 70% ethanol solution
Data group: Preservation moment
Values
2013-03-20
NA
Date identification
Date identification
Data group: Date identification
Values
2011-11-14
2011-11-17
2011-11-16
2011-10-02
2011-11-15
Name observer - identifier
Name of person who identified and weighed the earthworm
Data group: Helper
Values
Sam Ottoy; Hans De Wandeler
NA
Hans De Wandeler
Bart Muys
Sam Ottoy
* These persons could not be matched within the portal: Sam Ottoy, Jorgen Opdebeeck also contributed to this column.
Species
Earthworm species name, identified with the key of Sims and Gerard 1999
Data group: Earthworm species
Values
Aporrectodea caliginosa
Dendrobaena octaedra
Aporrectodea spp.
Dendrodrillus rubidus
Dendrobaena spp.
Development stage
Developmental stage of the earthworm: A= adult; S= subadult; J= juvenile ; / = development stage not determinable (Adult = clitellum, tubercula pubertatis and male pore developped; Subadult= clitellum, tubercula pubertatis and male pore not fully developped; Juvenile= no clitellum, tubercula pubertatis and male pore present)
Data group: Earthworm descriptor
Values
A
J
/
NA
S
Biomass
weight of the individual earthworm. 0 means no worm in sample
Unit: gram
Data group: Earthworm biomass
Values
0.004
0.007
0.006
0
0.005
* Jussila, I., These persons could not be matched within the portal: Sam Ottoy, Hans Nickmans, Eric Van Beek also contributed to this column.
Body part
Description of which part of the organism is sampled: Complete = entire organism; Head = only the rostral part; Tail = only the caudal part; Middle piece = only a middle part
Data group: Earthworm descriptor
Values
Head
Tail
NA
Complete
Middle piece
Density
Number of earthworm individuals scaled up to m², without additional correction for slope of the sampled area; 0 means no worms in sample
Unit: number
Data group: Earthworm density
Values
0
16
2
Biomass per square meter
Weight of the earthworm scaled up to 1m², without additional correction for slope of the sampled area; 0 means no worms in sample
Unit: gramsPerSquareMeter
Data group: Earthworm biomass
Values
0
0.008
0.012
0.014
0.01