期刊
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
卷 101, 期 9, 页码 706-711出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2010.04.010
关键词
Cs-137; Radioactivity in fruitbodies; Bioaccumulation of cesium; K-40; Cs-134; Depth of mycelium
资金
- MYCOREMED European Project [MEST-CT-2005-020387]
- Polish Ministry of Science and Higher Education [48/6.PR UE/2007/7]
Fruiting bodies of fungi belonging to more than 70 species were collected within a few thousand square meter area of one forest during 2006 and 2007. The soil profile was collected to check the cumulative deposition of Cs-137, which was relatively high, equal to 64 +/- 2 kBq/m(2) (calculated for October 2006). The majority of this activity was in the first 6 cm. Fruitbodies were analyzed for radiocesium and K-40 by means of gamma-spectrometry. The highest Cs-137 activity was 54.1 +/- 0.7 kBq/kg (dry weight) for a sample of Lactarius helvus collected in 2006. The results for 2006 were higher than those for 2007. In a few cases the traces of short-lived (T-1/2 = 2.06 a) Cs-134 were still found in samples. The importance of mycorrhizal fungi for radiocesium accumulation is confirmed. The differences in activity among the species are discussed in relation to observations and predictions from previous studies, where the change in relative accumulation between fruiting bodies of different species was at least partially explained by the differences in the depth of the mycelium localization in a litter/soil system. It is concluded that in some cases, such as Boletus edulis and Xerocomus badius, this prediction is fulfilled and therefore this explanation confirmed. (C) 2010 Elsevier Ltd. All rights reserved.
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