Size distribution of planktonic autotrophy and microheterotrophy in DeGray and West Point reservoirs: a comparative study. Final report

Technical Report · Sun Sep 01 00:00:00 EDT 1985

OSTI ID:6381859

Kimmel, B L; Groeger, A W

Particle size is an important determinant of food resources available to planktonic consumers and of the efficiency of energy transfer through planktonic foodwebs. Thus, the environmental factors controlling the size distributions of planktonic autotrophy (algal photosynthesis) and microheterotrophy (bacterial heterotrophic activity) are of considerable ecological interest. To examine hypotheses regarding their environmental control, we compared the size distributions of planktonic autotrophy and microheterotrophy within and between oligotrophic DeGray Reservoir (Arkansas) and eutrophic West Point Reservoir (Alabama-Georgia). Naturally occurring assemblages of reservoir phytoplankton and bacterioplankton were radiolabeled with sodium /sup 14/C-bicarbonate and sodium /sup 3/H-acetate and were size fractionated by filtration through polycarbonate membrane filters. 92 refs., 12 figs., 7 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6381859
• Report Number(s): DOE/OR/21400-T202; ON: DE86000319
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
WATER RESERVOIRS
AQUATIC ECOSYSTEMS
ARKANSAS
CARBON 14 COMPOUNDS
CHATTAHOOCHEE RIVER
EUTROPHICATION
EXPERIMENTAL DATA
FOOD CHAINS
PARTICLE SIZE
PLANKTON
SEASONAL VARIATIONS
TRACER TECHNIQUES
TRITIUM COMPOUNDS
AQUATIC ORGANISMS
DATA
ECOSYSTEMS
FEDERAL REGION VI
INFORMATION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
NORTH AMERICA
NUMERICAL DATA
RIVERS
SIZE
STREAMS
SURFACE WATERS
USA
VARIATIONS
520101* - Environment
Aquatic- Basic Studies- Radiometric Techniques- (-1989)