By Timothy J Sullivan
"While now not an everyday information merchandise, acidic deposition remains to be a common factor for environmental managers and coverage makers. Emissions of sulfur and nitrogen from strength vegetation, commercial amenities, and motorized vehicles - significant reasons of acidic deposition - nonetheless pour into the ambience each day. Aquatic results of Acidic Deposition summarizes and synthesizes significant developments in medical research, highlighting subject matters at once proper to coverage making."--BOOK JACKET. Read more...
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Extra info for Aquatic effects of acidic deposition
4. , 1991). Paleolimnological reconstructions of past lake-water chemistry are based on transfer functions derived from relationships between current chemistry and diatom/chrysophyte remains in surface sediments. Predictive equations are developed from these relationships using regional lake data sets to infer past water chemistry. Several techniques have been developed and applied to infer pH and ANC. Calibration equations have also been developed for inferring the concentration of DOC, total Al, and monomeric Al.
1985), suggesting a historic decrease of 3 to 6 mg/L DOC. It is now known that the concentration of organic acid anions does change in response to changes in acidic deposition, although the amount of change is often small. There are thus several problems and uncertainties associated with the use of empirical models for quantifying historical changes in surface water acid–base status. In the absence of regional quantification using an independent tool, such as paleolimnology or long-term monitoring, empirical models are of limited value except as a general indication of historical change in water chemistry.
2 Nitrogen The second important acid anion found in acidic deposition, in addition to sulfate, is nitrate. Nitrate (and also ammonium that can be converted to nitrate within the watershed) has the potential to acidify drainage waters and leach potentially toxic Al from watershed soils. In most watersheds, however, N is limiting for plant growth and, therefore, most N inputs are quickly incorporated into biomass as organic N with little leaching of NO3- into surface waters. , Sullivan, 1993). In addition, a smaller N research effort has been directed at investigating effects of N deposition on aquatic ecosystems.
Aquatic effects of acidic deposition by Timothy J Sullivan