Relative Abundance and Resistance Traits of Two Collembola Species Under Metal Stress

Abstract

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. British Ecological Society is collaborating with JSTOR to digitize, preserve and extend access to Journal of Applied Ecology. Summary 1. Population differentiation was studied in Onychiurus armatus (Tullb.) and Isotoma notabilis Schaffer from a reference site and two highly polluted (Cu, Zn) sites (long-term and short-term exposed, respectively) in the Gusum area, SE Sweden. 2. Growth, survival and reproduction were followed in a F1 generation of 0. armatus reared on a diet of the fungus Verticillium bulbillosum (W. Gams and Malla) grown on a series of Cu + Zn amended agar plates. Survival and reproduction were observed in a P generation of L notabilis incubated in soils with enhanced concentrations of Cu and Zn. 3. Metals affected growth rate but not mean maximum length of 0. armatus. The growth rates of both populations decreased significantly with increasing metal concentrations. Animals from the polluted site were less affected by metals and attained reproductive size earlier than those from the reference site. 4. Survival decreased with increasing metal exposure in both species, but there was no significant difference in survival between populations within the species. 5. Reproduction in terms of egg production (0. armatus) and number of juveniles (L notabilis) was significantly reduced by metals. 6. Higher overall reproduction rates were recorded for 0. armatus and I. notabilis from polluted sites compared with the reference sites. The difference between populations of both species reached a maximum in the most polluted treatments. 7. The rareness of I. notabilis in comparison with 0. armatus in the polluted soil could not be explained from a weaker phenotypic response to metals. In neither of the species was the population from the polluted site inferior to the reference population. 8. Selection for metal resistance in 0. armatus is suggested to operate on the body growth rate and for both species on the reproductive rate.

Toxicity of Nickel to a Soil-Dwelling Springtail,Folsomia fimetaria(Collembola: Isotomidae)

“…Although the mode of action may vary between metals and species, observations on Onychiurus armatus have demonstrated that when fed copper-, copper/lead-, or copper/ zinc-contaminated fungi the reduced reproduction is due to a reduced number of eggs rather than the ability of the eggs to hatch. A similar mode of action may also be the case for the eect of nickel on reproduction in F. ®metaria (Bengtsson et al, 1985;Tranvik et al, 1993).…”

Extrapolation of the laboratory-based OECD earthworm toxicity test to metal-contaminated field sites

“…Aporrectodea rosea (Savigny) and Allolobophora chlorotica (Savigny) appear to be more sensitive to metal contamination than L. rubellus or Lumbricus castaneus (Savigny), since these species are absent from soils containing -2800 pg g-1 Zn, whereas L. rubellus or L. castaneus survive in such soils. Species-specific responses to metal pollutants have been found in many groups of soil invertebrates including earthworms Morgan 1988, 1991), isopods (Hopkin, 1990;Jones and Hopkin 1991;Hopkin et al 1993) and Collembola (Bengtsson and Rundgren 1988;Tranvik and Eijsackers 1989;Tranvik et al 1993). These results indicate that it is important to adopt a species-specific approach in ecotoxicological studies (Van Straalen and Ernst 1991;Hopkin 1993).…”

Evaluation of growth and reproduction as indicators of soil metal toxicity to the Collembolan, Sinella curviseta

“…Collembola also have been used to improve the International Organization for Standardization (ISO) standard test (Fountain & Hopkin, 2001;Crouau et al, 1999). Many studies have been conducted in relation to Collembola sensitivity and resistance to pollutants in populations exposed to longterm contamination of soils, in particular to heavy metals (Posthuma, 1990;Posthuma et al, 1992;Tranvik et al, 1993).…”