Weiden Lake Conservation
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Citizens Statewide Lake Assessment Program
New York State Department of Environmental Conservation
New York State Freshwater Institute
New York State Federation of Lake Associations
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On The CSLAP Program
Summary of 2009 CSLAP Sampling Results
Evaluation of Eutrophication Indicators
Water clarity and chlorophylla readings were lower than normal, although the former is
due to higher color readings. Total phosphorus readings were close to normal in 2009, and none
of these indicators has exhibited any clear long-term trends. The lake can be characterized as
eutrophic, or highly productive, based on chlorophylla, water clarity and total phosphorus
readings (all typical ofeutrophic lakes). The TSI evaluation suggests that each of these trophic
indicators is “internally consistent”—each of these indicators is in the expected range given the
readings of the other indicators. Overall trophic conditions are summarized on the Lake
Evaluation of Potable Water Indicators
Algae levels are at times high enough to render the lake susceptible to taste and odor
compounds or elevated DBP (disinfection by product) compounds that could affect the potability
of the water, but the lake is not classified for use for drinking water.
Evaluation of Limnological Indicators
Some of the limnological indicators measured in CSLAP in 2009 deviated from normal.
Ammonia and true color readings were higher than normal in 2009. Ammonia readings have
increased over the last few years, although it is not known if this has resulted in any ecological
impacts. The rise in color readings in 2009 was seen in many other CSLAP lakes, and may have
been in response to wetter weather. Total nitrogen was lower than normal in 2009, but none of
these other limnological indicators has exhibited any clear long-term changes. It is likely that the
small changes in these indicators have been within the normal range of variability in the lake.
Overall limnological conditions are summarized in the Lake Scorecard.
Evaluation of Biological Condition
The limited macrophyte survey data collected through CSLAP at Weiden Pond found at
least 8 aquatic plant species, including one protected plant species (Potamogeton strictifolius,
narrow leafed pondweed). The modified FQI for the lake indicates that the quality of the aquatic
plant community is “excellent,” although it is clear that this represents an incomplete inventory
of the aquatic plant community.
The composition of the fish community is not known, but it is assumed that the lake
supports a warmwater fishery.
Phytoplankton, zooplankton, and macroinvertebrates have not been evaluated through
CSLAP in Weiden Pond.
Evaluation of Lake Perception
Water quality assessments were more favorable than normal in 2009, leading to a more
favorable assessment of the recreational conditions in the lake. This occurred despite lower water
clarity (and higher water color), but was consistent with less algae growth. None of these
measures of lake perception has exhibited any clear long-term trends. Overall lake perception is
summarized on the Lake Scorecard.
Evaluation of Local Climate Change
Air and water temperature readings in the summer index period were close to normal in
2009, and neither air nor water temperature readings has exhibited any long-term trends. It is not
known if this is an indication of the lack of local climate change or if these changes cannot be
well evaluated through CSLAP.
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