2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/07/2017 | 10:00 AM - 10:15 AM | EFFECTS OF WATERSHED AND IN-STREAM LIMING ON MACROINVERTEBRATE ASSEMBLAGES IN ACIDIFIED TRIBUTARIES TO AN ADIRONDACK LAKE | 306C
EFFECTS OF WATERSHED AND IN-STREAM LIMING ON MACROINVERTEBRATE ASSEMBLAGES IN ACIDIFIED TRIBUTARIES TO AN ADIRONDACK LAKE
Water quality and ecosystems in the Adirondack Mountain Region of New York are recovering slowly from decades of acid deposition. Liming techniques are being explored as tools to accelerate this recovery. In 2012, a program was initiated using in-stream and aerial (whole-watershed) liming to improve water quality and Brook Trout (Salvelinus fontinalis) recruitment in three chronically acidified tributaries of a high-elevation Adirondack lake. Macroinvertebrates were sampled annually between 2013 and 2016 at 3 treated and 3 untreated (control) sites to assess the effects of each liming technique on this community. Despite marked improvements in water chemistry in all three limed streams, preliminary analyses do not indicate a clear positive response by macroinvertebrate communities. Species richness exhibited no response to either liming technique, and total macroinvertebrate abundance responded negatively to all three lime applications. The proportion of acid-sensitive taxa was generally low at all treated and untreated sites, but increased gradually at one of the in-stream liming sites. These results are consistent with a body of literature suggesting that liming is generally ineffective at restoring macroinvertebrate communities to a pre-acidification condition.
- C10 Biogeochemistry
- C16 Restoration Ecology
- C07 Lentic Ecology & C03 Invertebrates
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Presenters/Authors
Scott George
(), U.S. Geological Survey, sgeorge@usgs.gov;
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Barry Baldigo
(), U.S. Geological Survey, bbaldigo@usgs.gov;
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Greg Lawrence
(), U.S. Geological Survey, glawrenc@usgs.gov;
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Randy Fuller
(), Colgate University, rfuller@colgate.edu;
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