CS13 Environmental Ecotoxicology
Date: Friday, June 14, 2002
Time: 10:45:00 AM
Location: Esquimalt
 
BoylenCW, Darrin Fresh Water Inst. & Biology Dept. of Rensselaer Polytechnic Institute, Troy, NY, USA, boylec@rpi.edu
Nierzwicki-Bauer, S, A, Darrin Fresh Water Inst. & Biology Dept. of Rensselaer Polytechnic Institute, Troy, NY, USA, nierzs@rpi.edu
Sutherland, J, W, NYS Dept. of Environmental Conservation, Albany, NY, USA, jwsuther@gw.dec.state.ny.us
 
ACIDIC DEPOSITION IMPACTS ON 30 PONDED WATERS IN THE SOUTHWEST ADIRONDACKS: CORRELATIONS BETWEEN DEPOSITION, WATER CHEMISTRY AND BIOTA
image
In 1994, the Adirondack Effects Assessment Program began a synoptic sampling program of 4 physical, 20 chemical, and 5 biotic variables on 30 waters twice annually in mid and late summer. Designed to assess the current state of different biological trophic levels as an estimate of ecosystem health, the study has provided baseline data upon which to evaluate long-term (temporal) changes of future recovery of lake communities in this region. After 8 years of evaluating acidification effects on multiple trophic levels in several types of lake systems, patterns can be correlated between various chemical and biotic variables. Although SO4 levels have dropped significantly since the 1980s, they have remained essentially the same since the inception of the AEAP. Since 1994, NO3 levels have decreased moderately in 18 waters with a concomitant rise in pH. ANC stayed the same in 27 of the waters studied with a net increase in base cation concentration in 18 of them. Quantitative data on bacterioplankton, phytoplankton, zooplankton, aquatic plants and fish have provided insight into the interactive relationships between environmental factors and species abundance, biodiversity and possible indicator species.