The influence of soil properties on the toxicity of molybdenum to three species of soil invertebrates.
Mo toxicity to earthworms (Eisenia andrei), Collembola (Folsomia candida) and enchytraeids (Enchytraeus crypticus) was determined in 10 European soils and a standard artificial soil, freshly spiked with Na(2)MoO(4), after 28 days exposure. Mo affected survival only in three low pH sandy soils; in all other soils LC50 was >3200 mg Mo/kg dry soil. EC50 values for the reproduction toxicity of Mo were 129-2378 mg/kg for earthworms, 72->3396 mg/kg for Collembola, and 301->2820 mg/kg for enchytraeids. Variation in toxicity among soils could not be explained by differences in available (pore water, water and 0.01 M CaCl(2) extractable) Mo concentrations. Clay content best predicted the EC50 for Mo toxicity to earthworms, while toxicity of Mo for enchytraeids was best described by soil pH. For Collembola no relationships could be derived due to the absence of toxicity in most soils. Soil properties had a strong but species-specific effect on Mo toxicity to soil invertebrates.
Department of Animal Ecology, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands. kees.van.gestel@falw.vu.nl
Cornelis A M
CA
van Gestel
Eef
E
Borgman
Rudo A
RA
Verweij
Maria Diez
MD
Ortiz
D000818:Animals; D001181:Arthropods / Q000187:drug effects / Q000502:physiology; D001682:Biological Availability; D006863:Hydrogen-Ion Concentration; D007448:Invertebrates / Q000145:classification / Q000187:drug effects* / Q000502:physiology; D008982:Molybdenum / Q000493:pharmacokinetics / Q000633:toxicity*; D009835:Oligochaeta / Q000187:drug effects / Q000502:physiology; D012098:Reproduction / Q000187:drug effects; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry / Q000493:pharmacokinetics / Q000633:toxicity*; D012997:Solvents / Q000737:chemistry; D013045:Species Specificity; D013997:Time Factors; D036401:Toxicity Tests, Chronic
D012987:Soil; D012989:Soil Pollutants; D012997:Solvents; D008982:Molybdenum