Effects of acidity on primary productivity in lakes: phytoplankton. [Lakes Panther, Sagamore, and Woods]
Conference
·
OSTI ID:5503257
Relationships between phytoplankton communities and lake acidity are being studied at Woods Lake (pH ca. 4.9), Sagamore Lake (pH ca. 5.5), and Panther Lake (pH ca. 7.0). Numbers of phytoplankton species observed as of July 31, 1979 are Woods 27, Sagamore 38, and Panther 64, conforming to other observations that species numbers decrease with increasing acidity. Patterns of increasing biomass and productivity found in Woods Lake may be atypical of similar oligotrophic lakes in that they develop rather slowly instead of occuring very close to ice-out. Contributions of netplankton (net > 48 ..mu..m), nannoplankton (48 > nanno > 20 ..mu..m) and ultraplankton (20 > ultra >0.45 ..mu..m) to productivity per m/sup -2/ show that the smaller plankton are relatively more important in the more acid lakes. This pattern could be determined by nutrient availability (lake acidification leading to decreased availability of phosphorus). The amount of /sup 14/C-labelled dissolved photosynthate (/sup 14/C-DOM), as a percent of total productivity, is ordered Woods > Sagamore > Panther. This is consistent with a hypothesis that microbial heterotrophic activity is reduced with increasing acidity, but the smaller phytoplankton may be more leaky at low pH. (ERB)
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 5503257
- Report Number(s):
- BNL-27210; CONF-791090-5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUATIC ORGANISMS
CARBON 14 COMPOUNDS
COMPARATIVE EVALUATIONS
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DATA FORMS
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EXPERIMENTAL DATA
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ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAKES
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MOUNTAINS
NEW YORK
NORTH AMERICA
NUMERICAL DATA
PH VALUE
PHYTOPLANKTON
PLANKTON
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POPULATION DYNAMICS
PRODUCTIVITY
SPECIES DIVERSITY
SURFACE WATERS
TRACER TECHNIQUES
USA
WATER POLLUTION
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560302* -- Chemicals Metabolism & Toxicology-- Microorganisms-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUATIC ORGANISMS
CARBON 14 COMPOUNDS
COMPARATIVE EVALUATIONS
DATA
DATA FORMS
ENVIRONMENTAL EFFECTS
EXPERIMENTAL DATA
GRAPHS
INFORMATION
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAKES
MID-ATLANTIC REGION
MOUNTAINS
NEW YORK
NORTH AMERICA
NUMERICAL DATA
PH VALUE
PHYTOPLANKTON
PLANKTON
POLLUTION
POPULATION DYNAMICS
PRODUCTIVITY
SPECIES DIVERSITY
SURFACE WATERS
TRACER TECHNIQUES
USA
WATER POLLUTION