Assessing trends in fishery resources and lake-water aluminum from paleolimnological analyses of siliceous algae
Lake water aluminum concentrations have a significant influence on the composition of microfossil assemblages of diatoms and chrysophytes deposited in lake sediments. With the paleolimnological approach of multilake datasets in the Adirondack region of New York, USA, the authors use canonical correspondence analysis to describe past trends in lake water Al. Four lakes, previously investigated regarding acidification and fishery trends, are used to demonstrate that paleolimnological assessment can also provide direction, timing, and magnitude of trends for both toxic metals and fish resources. Additionally, the authors use weighted average regression and calibration to obtain quantitative reconstructions of past lake water Al concentrations. Such reconstructions provide further insight into fishery resource damage and can be compared with modelling results. According to paleolimnological reconstructions, some of the naturally most acidic lakes in the Adirondack region had preindustrial lake water concentrations of inorganic monomeric Al near 4/micromol times L. Although these high concentrations are surprising from a geochemical point of view, they may partially explain the preindustrial absence of fish, as has been independently determined by paleolimnological analysis of phantom midges (Chaoborus). Fishery resource deterioration in acidified Adirondack lakes was coincident with major increases in lake water Al concentrations.
- Research Organization:
- Queen's Univ., Kingston, ON (Canada). Dept. of Biology
- OSTI ID:
- 5148617
- Report Number(s):
- PB-92-180405/XAB
- Resource Relation:
- Other Information: Pub. in Canada Jnl. of Fisheries and Aquatic Sciences, v49 p116-127. See also PB91-226498. Prepared in cooperation with Bergen Univ. (Norway). Sponsored by Corvallis Environmental Research Lab., OR
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
01 COAL, LIGNITE, AND PEAT
ACID RAIN
ENVIRONMENTAL EFFECTS
ADIRONDACK MOUNTAINS
LAKES
WATER POLLUTION
ALUMINIUM
ECOLOGICAL CONCENTRATION
FISHES
SENSITIVITY
ACIDIFICATION
NEW YORK
BIOLOGICAL INDICATORS
AQUATIC ECOSYSTEMS
DIATOMS
FOSSILS
GEOCHEMISTRY
LIMNOLOGY
PALEONTOLOGY
PH VALUE
SEDIMENTS
WATER CHEMISTRY
ALGAE
ANIMALS
APPALACHIAN MOUNTAINS
AQUATIC ORGANISMS
ATMOSPHERIC PRECIPITATIONS
CHEMISTRY
CHROMOPHYCOTA
DEVELOPED COUNTRIES
ECOSYSTEMS
ELEMENTS
METALS
MOUNTAINS
NORTH AMERICA
PLANTS
POLLUTION
RAIN
SURFACE WATERS
USA
VERTEBRATES
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology
010900 - Coal
Lignite
& Peat- Environmental Aspects