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Microfungi and microbial activity along a heavy-metal gradient

Author:
  • Anders Nordgren
  • Erland Bååth
  • Bengt Söderström
Publishing year: 1983
Language: English
Pages: 1829-1837
Publication/Series: Applied and Environmental Microbiology
Volume: 45
Issue: 6
Document type: Journal article
Publisher: American Society for Microbiology

Abstract english

Soil fungal biomass, microfungal species composition, and soil respiration rate of conifer mor soil were studied along a steep copper and zinc gradient (up to 20,000 ,ug of Cu and 20,000 ,ug of Zn g-1 dry soil) around a brass mill near the town of Gusum in South Sweden. Fungal biomass and soil respiration rate decreased by

about 75% along the metal gradient. Above 1,000 ,ug of Cu g- 1, the decrease was clearly evident; below 1,000 ,ug of Cu g-1, no obvious effects were observed, but there was a tendency for a decrease in total mycelial length. No decrease in CFU was found along the gradient, but fungal species composition was drastically changed. The frequency of the genera Penicillium and Oidiodendron decreased

from about 30 and 20%, respectively, at the control sites to only a few percent close to the mill. Mortierella was most frequently isolated in moderately polluted sites, but at the highest pollution levels, a decrease in isolation frequency was evident. Some fungal taxa increased in abundance towards the mill, e.g., Geomyces (from 1 to 10%), Paecilomyces (0 to 10%), and sterile forms (from 10 to 20%). Analyses with a multivariate statistical method (partial least squares) showed that organic matter content and soil moisture had little influence on the fungal community compared with the heavy metal pollution.

Keywords

  • Biological Sciences

Other

Published
  • Microbial Ecology
  • ISSN: 0099-2240
Erland Bååth
E-mail: erland [dot] baath [at] biol [dot] lu [dot] se

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