ISSN:
1573-2932
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The lichensPseudoparmelia caperata (L.) Hale,Usnea ofsubfusca Stirt., andUmbilicaria mammulata (Ach.) Tuck. were exposed to simulated acidic rain with pH levels of 2.3, 3.0, 3.3, 4.3, or 5.6 and other. ions in concentrations normally found in rain in the eastern United States. The pH levels of the most acidic treatments (3.3, 3.0, 2.3) were similar to those found in fog, cloud water, and occasional rainfall events. The pH 4.3 and 5.6 treatments compared to average ambient conditions in the eastern and western United States, respectively, and caused no significant effects on photosynthesis. However, after the first week of treatment, significant effects of rain pH at the most acidic treatments on gross photysnthesis were detected inP. caperata andU. mammulata, but not inU. cfsubfusca. Visible effects of injury were also observed and included bleaching, necrotic spots, and necrotic margins, which resembled damage seen in field populations ofU. mammulata, the most sensitive species.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00649413
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