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Redevelopment of biological activity in strip-mine spoils: saprotrophic fungal assemblages of grass roots

Published online by Cambridge University Press:  05 December 2011

John C. Zak
John C. Zak
Affiliation:
Department of Biological Sciences, Texas Tech University, Lubbock, Texas 79409, U.S.A.
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Synopsis

The development of fungal assemblages on root-surfaces of Agropyron trachycaulum growing in control, peat, fertiliser, or sewage-amended oil sand tailings was followed over a four-year period. Although the number of fungal species isolated from the root-surfaces differed significantly among the amendments, species numbers did not change significantly within treatments over the four years. The species composition of the assemblages, however, changed considerably from year to year. Species abundance distributions for fungal assemblages from the control, peat, and fertiliser amended spoil were best described by logarithmic functions. Distributions from the sewage-treated spoil were best fitted by exponential functions. Although species composition changed over time, the forms of the species abundance distributions were not altered. The observed structure and dynamic nature of fungal assemblages on root-surfaces may not be a consequence of disturbance, but may be a typical feature of such assemblages. High nutrient addition to mine spoils can result in altered species abundance patterns, and may lead to a decrease in community stability.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 94: Fungi and Ecological Disturbance , 1988 , pp. 73 - 83
Copyright
Copyright © Royal Society of Edinburgh 1988

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