The accumulation of metals (Cd, Cu, Pb, Zn and Ca) by two ecologically contrasting earthworm species (Lumbricus rubellus and Aporrectodea caliginosa): implications for ecotoxicological testing
نویسندگان
چکیده
The metal (Cd, Cu, Pb, Zn and Ca) concentrations in the tissues, ingesta (crop contents) and egesta (faeces) were investigated in two physiologically contrasting earthworm species (Lumbricus rubellus and Aporrectodea caliginosa) inhabiting soils exhibiting various levels of heavy metal contamination. In addition, a complementary soil layering experiment, conducted under laboratory conditions, was undertaken to investigate whether the distribution of Pb within a soil vertical pro®le in ̄uenced the relative metal accumulation patterns of these species. Generally, the Cd, Cu and Pb concentrations of ®eld populations of A. caliginosa were signi®cantly greater than in L. rubellus, a pattern reversed for Ca. Concentrations of Zn were signi®cantly greater in A. caliginosa in soils containing the lowest Zn concentrations, but no species differences were apparent at high soil concentrations of this metal. Comparisons of metal concentrations between ingesta and soils indicate that both species selectively ingest material from the soil matrix, although no signi®cant correlations were found between tissue metal and ingesta metal concentrations. Differences in concentrations of Cd, Pb and Zn between the ingesta of the species were, however, concomitant with observed differences in tissue concentrations of the respective metals, which cannot be explained by excretion via the egesta. The soil strati®cation experiment indicated that Pb distribution within a soil pro®le affected the pattern of species differences in tissue metal concentrations observed in ®eld populations. The evidence therefore suggests that the difference in dietary intakes of these metals is an important factor in contributing to observed differences between these species, although other factors are also contributory. The observations are discussed in the context of soil hazard assessment monitoring, and in particular, the role of concentration factors in such applied surveys. # 1999 Elsevier Science B.V. All rights reserved.
منابع مشابه
Toxicokinetics of metals in the earthworm Lumbricus rubellus exposed to natural polluted soils--relevance of laboratory tests to the field situation.
The aim of this study was to estimate the bioavailability of essential (Zn, Cu) and non-essential metals (Cd, Pb) to the earthworm Lumbricus rubellus exposed to soils originating from a gradient of metal pollution in Southern Poland. Metal uptake and elimination kinetics were determined and related to soils properties. Experimental results were compared with tissue metal concentrations observed...
متن کاملVermiremoval of heavy metal in sewage sludge by utilising Lumbricus rubellus.
Experiments were conducted to remove heavy metals (Cr, Cd, Pb, Cu and Zn) from urban sewage sludge (SS) amended with spent mushroom compost (SMC) using worms, Lumbricus rubellus, for 105 days, after 21 days of pre-composting. Five combinations of SS/SMC treatments were prepared in triplicate along with a control for each treatment in microcosms. Analysis of the earthworms' multiplication and gr...
متن کاملPhysiological and behavioural effects of imidacloprid on two ecologically relevant earthworm species (Lumbricus terrestris and Aporrectodea caliginosa).
Earthworms play key roles in soils and sub-lethal effects of environmental toxicants on these organisms should be taken seriously, since they might have detrimental effects on higher ecological levels. In laboratory experiments we have assessed sub-lethal effects (body mass change and cast production) of imidacloprid on two earthworm species commonly found in different agricultural soils (Lumbr...
متن کاملNovel Approaches to Bioindication of Heavy Metals in Soils Contaminated by Oil Shale Wastes
The major sources of heavy metal pollution in Estonia are oil shale industry and oil shale combustion. There is an utmost need to monitorsoil pollution with heavy metals in this region. Earthworms are good accumulators of heavy metals and can be used as bioindicators. Endogeic species Aporrectodea caliginosa and Aporrectodea rosea as well as anecic species Lumbricus terrestris are good bioindic...
متن کاملAssessment of short and long-term effects of imidacloprid on the burrowing behaviour of two earthworm species (Aporrectodea caliginosa and Lumbricus terrestris) by using 2D and 3D post-exposure techniques.
Adverse effects of agrochemicals on earthworms' burrowing behaviour can have crucial impacts on the entire ecosystem. In the present study, we have therefore assessed short- and long-term effects on burrowing behaviour in the earthworm species Aporrectodea caliginosa and Lumbricus terrestris after exposure to a range of imidacloprid concentrations (0.2-4 mg kg(-1) dry weight (DW)) for different...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999