| Summary: | The National Acid Precipitation Assessment Program (NAPAP) was established by the Acid Precipitation Act of 1980 to develop and implement a program to increase understanding of the causes and effects of acidic deposition, and their history and prognosis. The objectives of this project were to determine the influence of precipitation chemistry, precipitation amount and character, and stream hydrologic components on biologically important stream chemistry parameters; and to determine the response of fish to episodic and chronic changes in these parameters. e selected six streams in eastern Maine for intensive monitoring of stream discharge, temperature, major chemical variables, and fish populations. recipitation volume and chemistry were measured at a central site, using NADP compatible equipment and methods. rtificial stream channels were constructed adjacent to one stream to conduct manipulation experiments testing hypotheses concerning episodic and chronic effects of acid and Al on two Atlantic salmon life history stages.
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