Biological indicators of lake acidification. Mills, K., H. & Schindler, D., W. Water, Air, and Soil Pollution, 30(3-4):779-789, 1986.
Biological indicators of lake acidification [pdf]Paper  abstract   bibtex   
Indicator taxa are identified, based on both synoptic surveys and whole lake acidification experiments, for lake acidification in the pH 6.0 to 5.0 range. Acidobiontic diatoms (e.g Asterionella ralfsii, Fragillaria acidobiontica, etc.), periphyton (Mougeotia and related species), macroinvertebrates (e.g. Hyalella azteca, Orconectes sp., etc.), leeches, and cyprinid fishes (e.g. Pimephales promelas, Notropis cornutus, etc.) are identified as target organisms during early phases of lake acidification.

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