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Title: Response of a forest ecotone to ionizing radiation. Progress report, October 15, 1978-October 14, 1979. [Aspen, maple, birch]

Abstract

Compositional and structural characteristics of three forest types, including aspen dominated, maple-birch dominated, and an intervening ecotone, were studied before and after irradiation in northern Wisconsin. Irradiation occurred during the summer of 1972. As of the summer of 1978, establishment of tree seedlings at 10 m from the radiation source continued to be inhibited by the vigorous development of ground vegetation except, in part, in the aspen area where seedling density increased sharply relative to 1977 because of an influx of Acer rubrum. By 1974 many of the seedlings at 20 m had reached the sapling size-class. At the present time it appears that recolonization of the 10 m irradiated zone by the original tree flora will be a very slow process, largely because of a dense growth of Rubus sp. and other heliophytes. As of 1978 the recovery of leaf litter production appeared to be continuing in all three areas although the ratios of tree to shrub litter were still well below preirradiation levels at 10 m and slightly below at 20 m. In most respects, the ecotone has shown properties and responses to radiation intermediate to those observed in the aspen and maple-birch areas. The rate and compositionalmore » characteristics of succession in the ecotone relative to aspen and maple-birch forest types is presently under study. (DC)« less

Authors:
;
Publication Date:
Research Org.:
Michigan State Univ., East Lansing (USA); Savannah River Ecology Lab., Aiken, SC (USA)
OSTI Identifier:
5519114
Report Number(s):
COO-2283-10
TRN: 80-007596
DOE Contract Number:  
EY-76-S-02-2283
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ASPENS; BIOLOGICAL RADIATION EFFECTS; BIRCHES; FORESTS; MAPLES; FOREST LITTER; PLANT GROWTH; PRODUCTIVITY; RADIOBIOLOGY; BIOLOGICAL EFFECTS; BIOLOGICAL MATERIALS; BIOLOGY; GROWTH; MATERIALS; PLANTS; RADIATION EFFECTS; TREES; 560141* - Radiation Effects on Plants- Basic Studies- (-1987)

Citation Formats

Murphy, P.G., and Sharitz, R.R.. Response of a forest ecotone to ionizing radiation. Progress report, October 15, 1978-October 14, 1979. [Aspen, maple, birch]. United States: N. p., 1979. Web. doi:10.2172/5519114.
Murphy, P.G., & Sharitz, R.R.. Response of a forest ecotone to ionizing radiation. Progress report, October 15, 1978-October 14, 1979. [Aspen, maple, birch]. United States. doi:10.2172/5519114.
Murphy, P.G., and Sharitz, R.R.. Sun . "Response of a forest ecotone to ionizing radiation. Progress report, October 15, 1978-October 14, 1979. [Aspen, maple, birch]". United States. doi:10.2172/5519114. https://www.osti.gov/servlets/purl/5519114.
@article{osti_5519114,
title = {Response of a forest ecotone to ionizing radiation. Progress report, October 15, 1978-October 14, 1979. [Aspen, maple, birch]},
author = {Murphy, P.G. and Sharitz, R.R.},
abstractNote = {Compositional and structural characteristics of three forest types, including aspen dominated, maple-birch dominated, and an intervening ecotone, were studied before and after irradiation in northern Wisconsin. Irradiation occurred during the summer of 1972. As of the summer of 1978, establishment of tree seedlings at 10 m from the radiation source continued to be inhibited by the vigorous development of ground vegetation except, in part, in the aspen area where seedling density increased sharply relative to 1977 because of an influx of Acer rubrum. By 1974 many of the seedlings at 20 m had reached the sapling size-class. At the present time it appears that recolonization of the 10 m irradiated zone by the original tree flora will be a very slow process, largely because of a dense growth of Rubus sp. and other heliophytes. As of 1978 the recovery of leaf litter production appeared to be continuing in all three areas although the ratios of tree to shrub litter were still well below preirradiation levels at 10 m and slightly below at 20 m. In most respects, the ecotone has shown properties and responses to radiation intermediate to those observed in the aspen and maple-birch areas. The rate and compositional characteristics of succession in the ecotone relative to aspen and maple-birch forest types is presently under study. (DC)},
doi = {10.2172/5519114},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 1979},
month = {Sun Jul 01 00:00:00 EDT 1979}
}

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