By Gerald R. Visgilio, Diana M. Whitelaw
This booklet is the results of a convention held biannually on the Goodwin-Niering middle for Conservation Biology and Environmental experiences at Connecticut collage. It makes use of an interdisciplinary method of specialise in vital ecological affects of acid deposition. The ebook combines examine findings and the coverage analyses of specialists from various educational disciplines with the positions complicated by means of representatives of varied nongovernmental firms.
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Extra resources for Acid in the environment : lessons learned and future prospects
1991). The most common material for mitigation is calcium carbonate (or limestone), although other materials have been effectively used. Mitigation has been 50 Charles T. Driscoll et al. practiced in Europe and North America to treat the effects of acidic deposition with some success. Direct application to lakes has been shown to neutralize acidity and allow for the survival of fish and other sensitive aquatic biota. This approach is less successful in lakes with short hydraulic residence times and in the recovery of a reproducing fish population (Driscoll et al.
However, over the past century acidic deposition has accelerated the loss of large amounts of available calcium and magnesium from the soil in acid-sensitive areas (Likens et al. 1996; Kirchner and Lydersen 1995; Huntington et al. 2000). Depletion occurs when base cations are displaced from the soil by acidic deposition at a rate faster than they can be replenished by the slow breakdown of rocks or the deposition of base cations from the atmosphere. This depletion of base cations fundamentally alters soil processes, compromises the nutrition of some trees, and hinders the capacity for sensitive soils to recover from inputs of acidic deposition.
Surface waters with ANC values below 0 |ieq/L during base flow conditions are considered chronically acidic. Waters with ANC values ranging from 0-50 jieq/L are susceptible to episodic acidification. Waters with ANC values greater than 50 |Lieq/L are less sensitive to acidic deposition. The capacity of a watershed to prevent decreases in ANC and resist the effects of acidic deposition depends on many factors, including climate, soil conditions, surficial and bedrock geology, and land-use history.
Acid in the environment : lessons learned and future prospects by Gerald R. Visgilio, Diana M. Whitelaw