Comparison of solid-phase bioassays and ecoscores to evaluate the toxicity of contaminated soils.
Five bioassays (inhibition of lettuce germination and growth, earthworm mortality, inhibition of springtail population growth, avoidance by springtails) were compared, using four coke factory soils contaminated by PAHs and trace elements, before and after biotreatment. For each bioassay, several endpoints were combined in an 'ecoscore', a measure of test sensitivity. Ecoscores pooled over all tested bioassays revealed that most organisms were highly sensitive to the concentration of 3-ring PAHs. When four soils were combined, behavioural tests using the springtail Folsomia candida showed higher ecoscores, i.e. they were most sensitive to soil contamination. However, despite overall higher sensitivity of behavioural tests, which could be used for cheap and rapid assessment of soil toxicity, especially at low levels of contamination, some test endpoints were more sensitive than others, and this may differ from a soil to another, pointing to the need for a battery of bioassays when more itemized results are expected.
Lors
Christine
C
Université Lille Nord de France, 1bis rue Georges Lefèvre, 59044 Lille Cedex, France.
Ponge
Jean-François
JF
Martínez Aldaya
Maite
M
Damidot
Denis
D
D000818:Animals; D001181:Arthropods / Q000187:drug effects; D001522:Behavior, Animal / Q000187:drug effects; D001681:Biological Assay; D004784:Environmental Monitoring; D018525:Germination / Q000187:drug effects; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D009835:Oligochaeta / Q000187:drug effects; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis / Q000633:toxicity*; D018675:Toxicity Tests / Q000379:methods*; D014131:Trace Elements / Q000032:analysis / Q000633:toxicity
D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; D014131:Trace Elements