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Two grass species, Festuca rubra (sown) and Calamagrostis epigejos (naturally recolonised), were studied at two fly ash deposit lagoons, weathered 5 (L1) and 13 years (1,2). Both species were assessed in terms of their invasive ability, photosynthetic efficiency, trace elements accumulation, and damage symptoms, while the characteristics of the habitat were assessed in terms of trace element content, and the pH and EC of the ash. In the ash weathered for 5 and 13 years, B and Mn concentrations fell within the normal range for soils, while there was an As, Mo and Cu excess, and Se and Zn deficit. There was no difference in the photosynthetic efficiency (ns) of the C. epigejos populations at the different-aged ash lagoons, but differences were found between the populations of F. rubra (P |
