Dissolved organic matter and lake metabolism: Biogeochemistry and controls of nutrient flux dynamics in lakes: Technical progress report, 1 July 1986-30 June 1987
Most lakes are small and possess large littoral and wetland components in the interface region between the open water per se and the drainage basin. Not only does the photosynthetic productivity of the surrounding littoral-wetland complex vastly exceed that of the pelagic zone, but the littoral-wetland vegetation and its intensive synthesis and decompositional metabolism regulate loading of inorganic nutrients passing to the open water (functioning as pulsed sources and sinks), and regulate loading of dissolved organic matter and particulate organic matter to the recipient open water, which by numerous complex pathways and mechanisms enhance or suppress pelagic productivity. Research emphasis was placed on the sources, fates, and interactions of dissolved and particulate organic matter in relation to inorganic chemical cycling: allochthonous loading to the lake system; and the coupled nutrient physiology and metabolism of phytoplankton, bacterial populations, macrophytes and attendant sessile algal-bacterial communities. Regulatory mechanisms of growth and rates of carbon and nutrient cycling were evaluated among the inorganic-organic influxes of allochthonous sources as they are controlled by wetland-littoral communities, the littoral photosynthetic producer-decomposer complex, the microflora of the sediment-water interface, and the microflora of the pelagic zone. 28 refs., 13 figs., 2 tabs.
- Research Organization:
- Michigan Univ., Ann Arbor (USA). Dept. of Biology
- DOE Contract Number:
- FG02-87ER60515
- OSTI ID:
- 6417979
- Report Number(s):
- DOE/ER/60515-1-Pt.1; COO-1599-308-Pt.1; ON: DE87012142
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALGAE
ENERGY BUDGETS
METABOLISM
PRODUCTIVITY
NUTRIENTS
RECYCLING
PHOSPHORUS
BIOGEOCHEMISTRY
AMMONIUM COMPOUNDS
AQUATIC ECOSYSTEMS
LAKES
LIMNOLOGY
MINERAL CYCLING
ORGANIC MATTER
PH VALUE
PHOSPHORUS 32
PHOSPHORUS 33
SEASONAL VARIATIONS
SEDIMENT-WATER INTERFACES
TRACER TECHNIQUES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMISTRY
DAYS LIVING RADIOISOTOPES
ECOSYSTEMS
ELEMENTS
GEOCHEMISTRY
INTERFACES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHOSPHORUS ISOTOPES
PLANTS
RADIOISOTOPES
SURFACE WATERS
VARIATIONS
520101* - Environment
Aquatic- Basic Studies- Radiometric Techniques- (-1989)