Ökologische Untersuchungen an Pflanzengesellschaften unterschiedlich stark gestörter schwermetallreicher Böden in Großbritannien

Problems of Interpreting the Relationship Between the Amounts of Lead and Zinc in Plants and Soil on Metalliferous Wastes

“…Table 1 shows that there are also large differences between some of the results of the various investigations carried out on Grassington Moor. Notable are the high values for soil zinc and the low values for soil lead found by Ernst (1968) and Shimwell and Laurie (1972) compared with those reported in the present work. Much of this variation will almost certainly be due to problems of sampling, since abandoned heavy-metal mine sites are extremely variable in composition and distribution oi spoil (Johnson et al, 1977).…”

“…However, the levels of lead and zinc in plants and their rooting media have been determined recently for a number of species on heavy-metal mine spoil-heaps in the United Kingdom (Alloway and Davies, 1971;Shimwell and Laurie, 1972;Johnson, McNeilly and Putwain, 1977;Johnston and Proctor, 1977;Williams, McNeilly and Wellington, 1977). The amounts of copper, lead and zinc present in the shoots of plants growing on soils containing abnormally high levels of one or more of these metals depend on a number of factors, including soil-type (Alloway and Davies, 1971;Miller, Hassett and Koeppe, 1975;Tyler, 1976;Koeppe, 1977), the species (Duvigneaud and Denaeyer-de Smet, 1965;Ernst, 1968;Shimwell and Laurie, 1972;Johnston and Proctor, 1977) and the degree of tolerance to the particular metal rWu, Thurman and Bradshaw, 1975). It is therefore to be expected that there is often wide variation in the metal content of the shoots of plants growing on soil with the same total metal content (Alloway and Davies, 1971;Wu et al, 1975).…”

The distribution of Minuartia verna and Thlaspi alpestre in the British Isles in relation to 13 soil metals

“…(Lambinon & Auquier 1963). Although the dominant factor in determining the type of vegetation is apparently the high level of one or more polyvalent cations in the substrate (Ernst 1968a), other characteristics of these habitats make them unfavourable for plant growth. Thus the soils are low in the major plant nutrients (Smith & Bradshaw 1970), the water holding capacity is x)ften limited due to the coarse texture of the soil; the softs are liable to erosion and the t'me textured soils are subjected to frost-heave in winter and early spring.…”

Φυτοκοινωνιολογικη Μελετη Της Βλαστησης Μεταλλοφορων Περιοχων Της Βορειας Ελλαδας

“…Ετσι συχνά συναντώνται σε μεταλλοφόρα κοιτάσματα όλα μαζί ή σε δ ιάφορουε μεταξύ tous συνδυασμούβ. meister et al 1967, Ernst 1968a,b, Simon 1975, Smith & Bradshaw 1979, Clark R.K. & Clark S.C. 1981, Banasova 1983, Jäger et al 1983, Sieghardt 1987. τική δράση του ασβεστίου στην τοξικότητα των Βαρέων μετάλλων (Antonovics et al 1971, Proctor & Woodeil 1975, Karataglis 1980, Wallace it Abou-Zamzam 1989, Wallace & Cha 1989.…”

“…Tis περισσότερεβ cpopés αυτέβ είναι μικρότερεβ από 50 μg/g που α ναφέρει ο Brooks (1983) (Ernst 1965b, 1972a, Maier et al 1981, Jäger et al 1983, Sieghardt 1985a,b, 1987, Babalonas et al 1987, Babalonas & Reeves 1988b, Konstantinou & Babalonas 1991. , Reeves 1988) onus enίans και η ικανότητα συσσώρευσηε του στοιχείου αυτού από το γένοε Thlaspi γενικότερα (Ernst 1965a, 1968a,b, 1975.…”