AI Article Synopsis
- The paper examines the effects of radiation on forests in Russia, focusing on acute forest irradiation studies and using an ecosystem approach to assess impacts across various endpoints.
- At low radiation doses (2.5 Gy), significant chromosome damage was found in pine trees, while higher doses (20-50 Gy) resulted in increased tree mortality and reduced primary productivity in both pine and birch trees.
- Seasonal differences in tree sensitivity to radiation were observed, with trees being 3-5 times more sensitive after spring exposure compared to autumn, highlighting the importance of considering ecosystem endpoints in radiation studies.
Article Abstract
The paper comprehensively brings together key data on radiation effects observed in the Russian studies with an acute forest irradiation. The experiments were based on the ecosystem approach, including an assessment of the radiation impacts based on a variety of the endpoints. The effects at the cellular level were observed at the lowest doses: a double increase of the chromosome aberrations in the apical meristem of pine were found at the site with the absorbed dose of 2.5 Gy. The effects at the tissues levels and trees mortality expressed in D were revealed for the trees received 20-50 Gy and a double reduction in a net primary radioactivity was observed at the doses of 14-38 Gy for pine and 280-750 Gy for birch. The seasonal differences in radiosensitivity of the forest ecosystems were noted: the radiosensitivity of the irradiated trees was 3-5 fold higher after the spring irradiation than that after autumn irradiation. An importance of the ecosystem endpoints is emphasized.
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| http://dx.doi.org/10.1016/j.jenvrad.2022.106908 | DOI Listing |
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