Activity of Microorganisms in Acid Mine Water I. Influence of Acid Water on Aerobic Heterotrophs of a Normal Stream
AUTOR(ES)
Tuttle, Jon H.
RESUMO
Comparison of microbial content of acid-contaminated and nonacid-contaminated streams from the same geographical area indicated that nonacid streams contained relatively low numbers of acid-tolerant heterotrophic microorganisms. The acid-tolerant aerobes survived when acid entered the stream and actually increased in number to about 2 × 103 per ml until the pH approached 3.0. The organisms then represented the heterotrophic aerobic microflora of the streams comprised of a mixture of mine drainage and nonacid water. A stream which was entirely acid drainage did not have a similar microflora. Most gram-positive aerobic and anaerobic bacteria died out very rapidly in acidic water, and they comprised a very small percentage of the microbial population of the streams examined. Iron- and sulfur-oxidizing autotrophic bacteria were present wherever mine water entered a stream system. The sulfur-oxidizing bacteria predominated over iron oxidizers. Ecological data from the field were verified by laboratory experiments designed to simulate stream conditions.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=252168Documentos Relacionados
- Studies on Thermophilic Bacteria: I. Aerobic Thermophilic Bacteria from Water 1
- Atypical Acid-fast Microorganisms: I. Nucleic Acid Fraction
- MICROORGANISMS IN ACID DRAINAGE FROM A COPPER MINE
- Activity of Microorganisms in Organic Waste Disposal: I. Introduction1
- ACTION OF FORMALDEHYDE ON MICROORGANISMS I. : Correlation of Activity with Formaldehyde Metabolism