Substrate competition between a salt marsh diatom and a bacterial population
Cylindrotheca closterium Ehrenberg, a benthic marine diatom, competes successfully with Acromonas sp. a bacterium from the same environment, for low molecular weight organic substrates when they are presented at natural concentrations (1 to 10 ..mu..M). In sort term (1 h) experiments, the uptake of mannose by C. closterium was enhanced in light. Seventy percent of the total uptake of mannose by both species was effected by C. closterium over a 1 h period in light. The diatom population was also competitive in darkness. The algal portion of glucose uptake over 1 h was 71% when both populations were given the substrate initially. Percentages of total amino acid uptake for C. closterium ranged from 33% glycine in light to 73% leucine in darkness when both species were given substrate initially. Cylindrotheca had smaller percentages of glucose and aspartic acid total uptake in competition experiments run to stationary phase (10 days).
- Research Organization:
- City College, New York
- OSTI ID:
- 5663553
- Journal Information:
- J. Phycol.; (United States), Journal Name: J. Phycol.; (United States) Vol. 15:1; ISSN JPYLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Aquatic-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
550200 -- Biochemistry
550700* -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ALDEHYDES
ALGAE
AMINO ACIDS
AQUATIC ECOSYSTEMS
ASPARTIC ACID
BACTERIA
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
COMPETITION
DATA
DATA FORMS
DIATOMS
ECOSYSTEMS
EXPERIMENTAL DATA
GLUCOSE
GLUTAMIC ACID
GLYCINE
HEXOSES
INFORMATION
ISOLATED VALUES
LEUCINE
MANNOSE
METABOLISM
MICROORGANISMS
MONOSACCHARIDES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHOTOSENSITIVITY
PLANTS
POPULATION DYNAMICS
SACCHARIDES
SENSITIVITY
SUBSTRATES
UPTAKE