Macrophyte growth in shallow streams: field investigations
Three contrasting segments of a stream, exhibiting varying levels of production, were monitored for water quality, oxygen-derived primary productivity and the yield and growth rate of indigenous aquatic plant biomass. Average daily primary productivity rates observed for the respective segments included: 3.9 g O/sub 2//m/sup 2//day for a low in-stream phosphorus (22 ..mu..g total P/L), periphyton-dominated community; 5.5 g O/sub 2//m/sup 2//day for a low in-stream phosphorus (17 ..mu..g total P/L) mixed periphyton-macrophyte community; 18.3 g O/sub 2//m/sup 2//day for an enriched phosphorus (1,340 ..mu..g total P/L) macrophyte-dominated community. Additional data are presented for sediment and interstitial sediment water nutrients and macrophyte biomass variations over a growing season. Specific photosynthetic rates estimated for the macrophyte population ranged from 0.005 day/sup -1/ to 0.244 day/sup -1/ for the low phosphorus environment to from 0.036 day/sup -1/ to 0.456 day/sup -1/ for the phosphorus-impacted segment. The need to accommodate natural and wastewater-derived in-stream aquatic plant productivity in wasteload allocation analysis is discussed.
- Research Organization:
- Univ. of Rhode Island, Kingston, RI
- OSTI ID:
- 5906263
- Journal Information:
- J. Transp. Eng.; (United States), Vol. 112:5
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
PLANTS
PRODUCTION
STREAMS
ENVIRONMENTAL TRANSPORT
PLANT GROWTH
WATER QUALITY
AQUATIC ECOSYSTEMS
ECOLOGICAL CONCENTRATION
FIELD TESTS
MONITORING
NUTRIENTS
PHOSPHORUS
PHOTOSYNTHESIS
WASTE WATER
WATER CHEMISTRY
YIELDS
CHEMICAL REACTIONS
CHEMISTRY
ECOSYSTEMS
ELEMENTS
ENVIRONMENTAL QUALITY
GROWTH
HYDROGEN COMPOUNDS
LIQUID WASTES
MASS TRANSFER
NONMETALS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
SURFACE WATERS
SYNTHESIS
TESTING
WASTES
WATER
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520200 - Environment
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560300 - Chemicals Metabolism & Toxicology