2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2019 | 9:45 AM - 10:00 AM | STREAMS ON ACID AND THEIR CALCIUM CARBONATE ANTIDOTE! | 151 DEF
STREAMS ON ACID AND THEIR CALCIUM CARBONATE ANTIDOTE!
We studied 5 Adirondack Mountain streams, 2 chronically acidic, 2 episodically acidic and 1 neutral stream. Lime was annually applied directly to 2 episodically acid streams from 2012 to 2015, and in 2013, we aerially applied lime to the drainage basin of a chronically acid stream. Rates of leaf decomposition and microbial respiration as well as macroinvertebrate community dynamics were compared across streams for summer and autumn in 2012, 2014, 2015 and 2018. Results showed lower leaf decomposition and microbial respiration rates in chronically acidic versus episodically acidic streams, and overall, decomposition rates were highest in summer. Macroinvertebrate densities and diversity were higher in summer than autumn and higher in neutral and episodically acid streams because of occurrence of Ephemeroptera and Trichoptera. In 2015 and especially 2018, the stream in the aerially limed catchment had higher microbial respiration and leaf decomposition rates and there were more caddisfly shredders in the limed versus chronically acid reference stream. Results suggest aerial lime applications are a more effective restoration tool to improve stream ecosystem function given the greater response of the microbial and macroinvertebrate community to this type of manipulation.
- Invertebrate
- Organic Matter
- Microbial
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Presenters/Authors
Randy Fuller
(), Colgate University, rfuller@colgate.edu;
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