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Environmental fate & pathways

Bioaccumulation: terrestrial

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Administrative data

Endpoint:
bioaccumulation: terrestrial
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: Data from a monitoring study. No correct analysis for total Mg concentration in soil (extraction with ammonium acetate-EDTA); Mg concentration in worms derived from graphs (average for all species present in a site).

Data source

Reference
Reference Type:
publication
Title:
Earthworm communities along a gradient of urbanization.
Author:
Pizl V., Josens G.
Year:
1995
Bibliographic source:
Environmental Pollution 90:7-14.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
monitoring study in soils and earthworms from 6 parks along a transect in Brussels. Biota-to-soil -accumulation-factor (BSAF) is calculated as the ratio of the Mg concentration in worms and the Mg concentration in soil.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Magnesium
EC Number:
231-104-6
EC Name:
Magnesium
Cas Number:
7439-95-4
Molecular formula:
Mg
IUPAC Name:
magnesium
Details on test material:
Elemental Mg concentration measured, no information on speciation

Test substrate

Vehicle:
no

Test organisms

Details on test organisms:
Earthworms collected in six sites along a gradient of urbanization, including Aporrectodea chlorotica, Aporrectodea caliginosa, Aporrectodea icterica, Aporrectodea rosea, Lumbricus castaneus, Lumbricus rubellus and Lumbricus terrestris

Test conditions

Details on test conditions:
Sandy loam soils; pH (H2O) 5.9-7.1, TOC 2.32-4.38%.
Nominal and measured concentrations:
internal Mg concentrations: 14500-16500 mg Mg/kg dry weight

Results and discussion

Bioconcentration factor
Type:
BSAF
Value:
2.6 - 11.3 L/kg
Basis:
whole body d.w.
Calculation basis:
steady state
Remarks on result:
other: based on monitoring data of Mg concentration in worms and soil

Any other information on results incl. tables

Biota-to-soil -accumulation-factor (BSAF) were calculated as the ratio of the Mg concentration in worms (range 14500 -16500 mg Mg/kg dry weight) and the Mg concentration in soils (range 1103 -5640 mg Mg/kg dry weight) . The BASF range values are between 2.6 and 11.3.

Applicant's summary and conclusion