The distribution of Minuartia verna and Thlaspi alpestre in the British Isles in relation to 13 soil metals |
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Authors: | A García-Gonzalez S C Clark |
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Institution: | (1) Estación Agrícola Experimental, Consejo Superior de Investigaciones Científicas, Apartado 788-24080, León, Spain;(2) Department of Pure and Applied Biology, The University of Leeds, LS2 9JT, England |
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Abstract: | The plant-communities from habitats of the metallophyte species Minuartia verna and Thlaspi alpestre (T. caerulescens) at sites disturbed and undisturbed by mining are described. Four communities were delineated by cluster and principal component analysis. Group 1 comprised species-poor communities on disturbed non-calcareous soils; group 2, relatively species-rich communities on disturbed calcareous soils; group 3, species-rich communities in the main on undisturbed calcareous soils. Group 4 consisted of species-rich communities with an alpine element, in damp habitats on base-rich soils derived from igneous rocks. Total and exchangeable elements As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Mg, Mn, Ni, Pb and Zn were determined for the soils of these sites. Levels of soil Ca, Cd, Pb and Zn accounted for most of the variation along the first axis of the PCA and soil nutrient levels were probably the main predictor along the second.Abbreviations PCA
Principal Component Analysis |
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Keywords: | Cluster-analysis Metalliferous soil Metallophyte Plant distribution Polyvalent cation Principal component |
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