Journal
EUROPEAN JOURNAL OF SOIL BIOLOGY
Volume 37, Issue 4, Pages 333-336Publisher
GAUTHIER-VILLARS/EDITIONS ELSEVIER
DOI: 10.1016/S1164-5563(01)01110-4
Keywords
calcium; food chain; strontium; terrestrial macroinvertebrates; trophic levels
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Stable Sr and Ca concentrations were determined in natural populations of a plant species (Urtica dioica) and several invertebrate groups (isopods, earthworms, gastropod molluscs and a chilopod) from a celestite (SrSO4)-rich site near Yate, S.W. England. Sr concentrations were not biomagnified in successive trophic levels. Sr concentrations were higher in organisms with mineralized skeletons such as isopods, compared with soft-bodied lumbricid worms. There were significant differences in Sr burdens between closely-related species with known differences in Ca physiology, notably between endogeic and epigeic earthworms. However, Sr:Ca ratios provided strong evidence for Sr discrimination, relative to Ca, particularly in those groups with high Ca requirements. (C) 2001 Editions scientifiques et medicales Elsevier SAS.
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