Earthworm data of the exploratory region in Poland (September 2012)

Usage Rights

This data is Free within projects.

Dataset Abstract

The belowground foodweb holds a big part of the associated biodiversity in forest ecosystems and plays a major role in litter decomposition and nutrient turnover. So far important interactions between diversity and composition of above- and belowground foodwebs have been observed, however, without being conclusive on the effects of tree species diversity on the belowground foodweb. The response of earthworms as important functional group in the soil ecosystem is assessed. The earthworm sampling records the abundance, biomass and species diversity of earthworms in each focal region. All (30 x 30) m2 plots are divided in nine (10 x 10) m2 subplots. In every plot, earthworms were sampled in the middle subplot. 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

For every plot of the focal region, plots (30 x 30) m2 are divided in nine (10 x 10) m2 subplots. In every plot, earthworms were sampled in the middle subplot. In principle, within every middle subplot, the samples are taken randomly, but samples are not taken close to tree stems. 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. 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

Bialowieza Forest, Poland

Temporal Extent

Autumn 2012

Taxonomic Extent

Earthworms

Data columns available in the raw data part of this dataset

Date
Data of sampling
Data group: Survey date
Values
2012-09-05
2012-09-06
2012-09-04
2012-09-01
2012-09-03
Time
Time of sampling
Data group: Survey time
Values
1899-12-30 08:22:00
1899-12-30 08:30:00
1899-12-30 08:10:00
1899-12-30 08:00:00
1899-12-30 08:20:00
PlotID
Unique plot id
Data group: Exploratory plot id
Values
POL05
POL04
POL01
POL02
POL03
Name sampler
Name of person who sampled the earthworms
Data group: Helper
Values
Astrid Vannoppen; Jakub Zaremba; Eric Van Beek
Eric Van Beek; Astrid Vannoppen
Jakub Zaremba
Astrid Vannoppen
Astrid Vannoppen; Jakub Zaremba
Sampling method
Method of sampling: L=Litter sample; M=Mustard extraction; S=Soil sample
Data group: Sampling method
Values
S
M
L
Slope length
Lengthwise slope of the sampled area. Value 0 if slope <5°
Unit: degree
Data group: Topography
Values
0
5
Slope width
Width-wise slope of the sampled area. Value 0 if slope <5°
Unit: degree
Data group: Topography
Values
0
Sample code
Sample point code (year/sampling responsible/country/chronological number of sampling action)
Data group: Sample code
Values
12HWPE003
12HWPE004
12HWPE001
12HWPE002
12HWPE005
Date on formol
Date on which the earthworm fixation in a 5% formaldehyde solution started
Data group: Fixation moment
Values
NA
2012-09-20
Date back on ethanol
Date on which the earthworm is transferred from formaldehyde solution to 70% ethanol solution
Data group: Preservation moment
Values
2013-03-29
NA
Date identification
Date identification
Data group: Identification moment
Values
2013-04-30
2013-04-23
2013-04-22
2013-04-29
2013-04-26
Name observer - identifier
Name of person who identified and weighed the earthworm
Data group: Helper
Values
Jorgen Opdebeeck
NA
* These persons could not be matched within the portal: 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 sp.
Aporrectodea rosea
Dendrodrillus rubidus
Aporrectodea caliginosa
Dendrobaena octaedra
Developing stage
Developing stage
Data group: Earthworm descriptor
Values
J
/
NA
A
S
Biomass
weight of the individual earthworm. 0 means no worm in sample
Unit: gram
Data group: Earthworm biomass
Values
0.002
0.003
0
0.004
0.005
* These persons could not be matched within the portal: Astrid Vannoppen, Eric Van Beek, Johan Coremans, Jorgen Opdebeeck, Jakub Zaremba 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
Complete
Middle piece
Head
Tail
NA
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
Keywords: process, decomposition
Values
0
2
16
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
Keywords: process, decomposition
Values
0.004
0.01
0.008
0
0.006