Ammonia uptake by phytoplankton and limnological studies of Mountain Lake, Virginia
Thesis/Dissertation
·
OSTI ID:5366135
The first comprehensive year-round investigation of Mountain Lake, Virginia since 1970-71 was begun in March 1985 and continued through November 1987. Whereas inorganic nitrogen, orthophosphate, Secchi disc transparency, and primary productivity continue to suggest an oligotrophic condition, important limnological changes are indicated by the greater seasonal hypolimnetic oxygen depletion and extractable chlorophyll a which at times approach mesotrophic levels. In addition, the decrease in alkalinity, the increase in sulfate levels, and the increase in pH fluctuations compared to the past, suggest that Mountain Lake is susceptible to damage or change by acid rain and perhaps other perturbations that effect pH alkalinity or hardness. Changes were also noted in phytoplankton composition. Studies of ammonia uptake by the phytoplankton, using the ammonia analog ({sup 14}C)methylamine (MeA), revealed that during thermal stratification, phytoplankton succession was related to rapid ammonia uptake. Each successive phytoplankton community had significantly higher Vmax values for ammonia (methylamine) until midsummer when ammonia-nitrogen levels were at a seasonal low.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA)
- OSTI ID:
- 5366135
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520101 -- Environment
Aquatic-- Basic Studies-- Radiometric Techniques-- (-1989)
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID NEUTRALIZING CAPACITY
ACID RAIN
ACIDIFICATION
AMMONIA
AQUATIC ORGANISMS
ATMOSPHERIC PRECIPITATIONS
CARBON 14 COMPOUNDS
CHEMISTRY
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EFFECTS
FEDERAL REGION III
HYDRIDES
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAKES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NORTH AMERICA
OXYGEN COMPOUNDS
PH VALUE
PHYTOPLANKTON
PLANKTON
POLLUTION
PRODUCTIVITY
RAIN
SEASONAL VARIATIONS
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS
TRACER TECHNIQUES
UPTAKE
USA
VARIATIONS
VIRGINIA
WATER CHEMISTRY
WATER POLLUTION
Aquatic-- Basic Studies-- Radiometric Techniques-- (-1989)
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACID NEUTRALIZING CAPACITY
ACID RAIN
ACIDIFICATION
AMMONIA
AQUATIC ORGANISMS
ATMOSPHERIC PRECIPITATIONS
CARBON 14 COMPOUNDS
CHEMISTRY
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL EFFECTS
FEDERAL REGION III
HYDRIDES
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAKES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NORTH AMERICA
OXYGEN COMPOUNDS
PH VALUE
PHYTOPLANKTON
PLANKTON
POLLUTION
PRODUCTIVITY
RAIN
SEASONAL VARIATIONS
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS
TRACER TECHNIQUES
UPTAKE
USA
VARIATIONS
VIRGINIA
WATER CHEMISTRY
WATER POLLUTION