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Title: Lichen growth responses to stress induced by automobile exhaust pollution

Abstract

Growth rates were significantly suppressed in juvenile thalli (less than 0.1 square millimeter in initial size) of the saxicolous lichen Pseudoparmelia baltimorensis from a Potomac River island with high atmospheric lead burden as compared to the case for a similar island with a lower lead burden. However, larger thalli showed no significant changes in growth response as a result of atmospheric pollution stress. Disruptions in lichen growth thus appear to affect life stages when growth is most rapid and food reserves are low. Once a minimum thallus size is attained, the stress tolerance of the lichen increases.

Authors:
 [1];
  1. (George Mason Univ., Fairfax, VA)
Publication Date:
OSTI Identifier:
5638189
Resource Type:
Journal Article
Journal Name:
Science; (United States)
Additional Journal Information:
Journal Volume: 204
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 54 ENVIRONMENTAL SCIENCES; EXHAUST GASES; BIOLOGICAL EFFECTS; LEAD; LICHENS; PLANT GROWTH; AIR POLLUTION; AUTOMOBILES; BIOLOGICAL STRESS; BODY BURDEN; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; ISLANDS; ISOLATED VALUES; LIFE CYCLE; POTOMAC RIVER; QUANTITY RATIO; ALGAE; DATA; DATA FORMS; ELEMENTS; FUNGI; GASEOUS WASTES; GROWTH; INFORMATION; METALS; NUMERICAL DATA; PLANTS; POLLUTION; RIVERS; STREAMS; SURFACE WATERS; VEHICLES; WASTES; 560303* - Chemicals Metabolism & Toxicology- Plants- (-1987); 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Lawrey, J.D., and Hale, M.E. Jr. Lichen growth responses to stress induced by automobile exhaust pollution. United States: N. p., 1979. Web. doi:10.1126/science.204.4391.423.
Lawrey, J.D., & Hale, M.E. Jr. Lichen growth responses to stress induced by automobile exhaust pollution. United States. doi:10.1126/science.204.4391.423.
Lawrey, J.D., and Hale, M.E. Jr. Fri . "Lichen growth responses to stress induced by automobile exhaust pollution". United States. doi:10.1126/science.204.4391.423.
@article{osti_5638189,
title = {Lichen growth responses to stress induced by automobile exhaust pollution},
author = {Lawrey, J.D. and Hale, M.E. Jr.},
abstractNote = {Growth rates were significantly suppressed in juvenile thalli (less than 0.1 square millimeter in initial size) of the saxicolous lichen Pseudoparmelia baltimorensis from a Potomac River island with high atmospheric lead burden as compared to the case for a similar island with a lower lead burden. However, larger thalli showed no significant changes in growth response as a result of atmospheric pollution stress. Disruptions in lichen growth thus appear to affect life stages when growth is most rapid and food reserves are low. Once a minimum thallus size is attained, the stress tolerance of the lichen increases.},
doi = {10.1126/science.204.4391.423},
journal = {Science; (United States)},
number = ,
volume = 204,
place = {United States},
year = {1979},
month = {4}
}