Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters
Journal Article
·
· Appl. Environ. Microbiol.; (United States)
OSTI ID:6957574
The abundance and heterotrophic activity of attached and free-living bacteria was examined seasonally in coastal water. Heterotrophic activity was determined by the uptake of (/sup 14/C)glucose. The density of attached bacteria was always minor, not showing a seasonal variation, whereas the free-living bacteria were more numerous and showed a marked seasonal variation, their density being higher under warmer conditions. The contribution of the attached bacteria to the total assimilation of (/sup 14/C)glucose was lower than that of the free-living bacteria, neither of them showing a seasonal variation. On a cellular basis, attached bacteria were more active, since they assimilated more (/sup 14/C)glucose and showed, under warmer conditions, a higher cellular volume. The authors consider that the factors responsible for these observations were the amount and quality of the particulate material, the different availability of organic matter for the two types of bacteria, and in a fundamental way, the variation in water temperature.
- Research Organization:
- Universidad del Pais Vasco, Bilbao (Spain)
- OSTI ID:
- 6957574
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Journal Name: Appl. Environ. Microbiol.; (United States) Vol. 53:10; ISSN AEMID
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520101 -- Environment
Aquatic-- Basic Studies-- Radiometric Techniques-- (-1989)
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALDEHYDES
BACTERIA
BIOLOGICAL AVAILABILITY
CARBOHYDRATES
CARBON 14 COMPOUNDS
COASTAL WATERS
GLUCOSE
HEXOSES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
ORGANIC MATTER
POPULATION DENSITY
SACCHARIDES
SEASONAL VARIATIONS
SURFACE WATERS
TRACER TECHNIQUES
UPTAKE
VARIATIONS
Aquatic-- Basic Studies-- Radiometric Techniques-- (-1989)
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALDEHYDES
BACTERIA
BIOLOGICAL AVAILABILITY
CARBOHYDRATES
CARBON 14 COMPOUNDS
COASTAL WATERS
GLUCOSE
HEXOSES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
ORGANIC MATTER
POPULATION DENSITY
SACCHARIDES
SEASONAL VARIATIONS
SURFACE WATERS
TRACER TECHNIQUES
UPTAKE
VARIATIONS