Sediment environment of Port Valdez, Alaska: the effect of oil on this ecosystem
Technical Report
·
OSTI ID:5662643
The Port Valdez intertidal sediment system was studied for three years. Physical, geological, geochemical, hydrocarbon, and biological features were examined. Sediments were poorly sorted gravels to plastic clays, and had low amounts of organic matter. Bacterial numbers varied from site to site, and decreased in numbers with depth. Meiofauna consisted primarily of nematodes and harpacticoid copepods. Most meiofaunal species were restricted to the upper three centimeters throughout the year. Meiofaunal densities wre typically highest in summer and lowest in winter. Reproductive activities of copepods tended to be seasonal with only one species reproducing throughout the year. Bacterial populations were unaffected by single applications. It is concluded that oil is removed rapidly by tidal action. Three species of copepods exposed to oil in the field significantly increased in density in experimentally oiled plots. Uptake and release of added oil by intertidal sediments and the clam (Macoma balthica) were examined in the field. Petroleum was not detectable two months after application to sediments.
- Research Organization:
- Alaska Univ., College (USA)
- OSTI ID:
- 5662643
- Report Number(s):
- EPA-600/3-76-086
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020900 -- Petroleum-- Environmental Aspects
560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
560304 -- Chemicals Metabolism & Toxicology-- Invertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALASKA
ANIMALS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
ARTHROPODS
BACTERIA
BIOLOGICAL EFFECTS
COASTAL WATERS
COPEPODS
CRUSTACEANS
ECOSYSTEMS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
FOSSIL FUELS
FUELS
INVERTEBRATES
MICROORGANISMS
MOLLUSCS
NEMATODES
NORTH AMERICA
PACIFIC NORTHWEST REGION
PETROLEUM
POLLUTION
POPULATION DENSITY
SEASONAL VARIATIONS
SEDIMENTS
SURFACE WATERS
USA
VARIATIONS
WATER POLLUTION
020900 -- Petroleum-- Environmental Aspects
560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
560304 -- Chemicals Metabolism & Toxicology-- Invertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALASKA
ANIMALS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
ARTHROPODS
BACTERIA
BIOLOGICAL EFFECTS
COASTAL WATERS
COPEPODS
CRUSTACEANS
ECOSYSTEMS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
FOSSIL FUELS
FUELS
INVERTEBRATES
MICROORGANISMS
MOLLUSCS
NEMATODES
NORTH AMERICA
PACIFIC NORTHWEST REGION
PETROLEUM
POLLUTION
POPULATION DENSITY
SEASONAL VARIATIONS
SEDIMENTS
SURFACE WATERS
USA
VARIATIONS
WATER POLLUTION