Effects of simulated acidic rain on one species each of Pseudoparmelia, Usunea, and umbilicaria
Abstract
The lichens Pseudoparmelia caperata (L.) Hale, Usnea of subfusca Stirt., and Umbilicaria 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 photosynthesis were detected in P. caperata and U. mammulata, but not in U. of subfusca. Visible effects of injury were also observed and included bleaching, necrotic spots, and necrotic margins, which resembled damage seen in field populations of U. mammulata, the most-sensitive species.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (USA). Environmental Sciences Div.
- OSTI Identifier:
- 5671558
- Report Number(s):
- PB-88-107099/XAB
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Pub. in Water, Air and Soil Pollution, Vol. 27, 315-322(1986)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ACID RAIN; BIOLOGICAL EFFECTS; AIR POLLUTION; LICHENS; ENVIRONMENTAL EFFECTS; PHOTOSYNTHESIS; TOXICITY; ALGAE; ATMOSPHERIC PRECIPITATIONS; CHEMICAL REACTIONS; FUNGI; PHOTOCHEMICAL REACTIONS; PLANTS; POLLUTION; RAIN; SYNTHESIS; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989); 560300 - Chemicals Metabolism & Toxicology
Citation Formats
Sigal, L L, and Johnston, J W. Effects of simulated acidic rain on one species each of Pseudoparmelia, Usunea, and umbilicaria. United States: N. p., 1986.
Web.
Sigal, L L, & Johnston, J W. Effects of simulated acidic rain on one species each of Pseudoparmelia, Usunea, and umbilicaria. United States.
Sigal, L L, and Johnston, J W. 1986.
"Effects of simulated acidic rain on one species each of Pseudoparmelia, Usunea, and umbilicaria". United States.
@article{osti_5671558,
title = {Effects of simulated acidic rain on one species each of Pseudoparmelia, Usunea, and umbilicaria},
author = {Sigal, L L and Johnston, J W},
abstractNote = {The lichens Pseudoparmelia caperata (L.) Hale, Usnea of subfusca Stirt., and Umbilicaria 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 photosynthesis were detected in P. caperata and U. mammulata, but not in U. of subfusca. Visible effects of injury were also observed and included bleaching, necrotic spots, and necrotic margins, which resembled damage seen in field populations of U. mammulata, the most-sensitive species.},
doi = {},
url = {https://www.osti.gov/biblio/5671558},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}