Comparison between two methods of assaying relative microbial activity in marine environments.

AUTOR(ES)

Griffiths, R P

RESUMO

Two methods for determining relative microbial activity in the marine environment were compared. In one method, a single concentration of a labeled substrate was used to calculate rates of substrate utilization; in the other, multiple concentrations of the same substrate (heterotrophic activity method) were used to calculate maximum potential substrate utilization rates. These studies were made on 232 seawater and 79 sediment samples taken from a variety of marine environments. The highest correlations between these two methods were seen in the sediment samples tested. The lowest correlation coerfficient seen in the sediment samples was 0.90, and the highest was 0.98. In seawater samples (six studies), the lowest correlation coefficient was 0.77 and the highest was 0.95. The correlation between these two methods was also substrate concentration dependent. Higher correlation coefficients were observed when higher substrate concentrations were used. Under certain conditions, these two methods appear to be comparable for estimating relative levels of microbial activity in the marine environment.

Documentos Relacionados

• Archaea in coastal marine environments.
• Virulence of Vibrio vulnificus strains from marine environments.
• Bactericidal activity of M14659 enhanced in low-iron environments.
• Quantitative analysis of bacterial aerosols in two different dental clinic environments.
• Relationship between cell coiling and motility of spirochetes in viscous environments.