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Title: Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Universidad del Pais Vasco, Bilbao (Spain)
OSTI Identifier:
6957574
Resource Type:
Journal Article
Resource Relation:
Journal Name: Appl. Environ. Microbiol.; (United States); Journal Volume: 53:10
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; BACTERIA; POPULATION DENSITY; GLUCOSE; UPTAKE; ORGANIC MATTER; BIOLOGICAL AVAILABILITY; CARBON 14 COMPOUNDS; COASTAL WATERS; SEASONAL VARIATIONS; TRACER TECHNIQUES; ALDEHYDES; CARBOHYDRATES; HEXOSES; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; MICROORGANISMS; MONOSACCHARIDES; ORGANIC COMPOUNDS; SACCHARIDES; SURFACE WATERS; VARIATIONS; 520200* - Environment, Aquatic- Chemicals Monitoring & Transport- (-1989); 560300 - Chemicals Metabolism & Toxicology; 520101 - Environment, Aquatic- Basic Studies- Radiometric Techniques- (-1989)

Citation Formats

Iriberri, J., Unanue, M., Barcina, I., and Egea, L. Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters. United States: N. p., 1987. Web.
Iriberri, J., Unanue, M., Barcina, I., & Egea, L. Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters. United States.
Iriberri, J., Unanue, M., Barcina, I., and Egea, L. Thu . "Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters". United States.
@article{osti_6957574,
title = {Seasonal variation in population density and heterotrophic activity of attached and free-living bacteria in coastal waters},
author = {Iriberri, J. and Unanue, M. and Barcina, I. and Egea, L.},
abstractNote = {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.},
doi = {},
journal = {Appl. Environ. Microbiol.; (United States)},
number = ,
volume = 53:10,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 1987},
month = {Thu Oct 01 00:00:00 EDT 1987}
}