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Radiocaesium in the fungal compartment of forest ecosystems

Vinichuk, Mykhaylo (2003). Radiocaesium in the fungal compartment of forest ecosystems. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Agraria, 1401-6249 ; 434
ISBN 91-576-6478-1
[Doctoral thesis]

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Abstract

Fungi in forest ecosystems are major contributors to accumulation and cycling of radionuclides, especially radiocaesium. However, relatively little is known about uptake and retention of 137Cs by fungal mycelia. This thesis comprises quantitative estimates of manually prepared mycelia of mainly ectomycorrhizal fungi and their possible role in the retention, turnover and accumulation of radiocaesium in contaminated forest ecosystems. The studies were conducted in two forests during 1996-1998 and 2000-2003. One was in Ovruch district, Zhytomyr region of Ukraine (51º30"N, 28º95"E), and the other at two Swedish forest sites: the first situated about 35 km northwest of Uppsala (60º05"N, 17º25"E) and the second at Hille in the vicinity of Gävle (60º85"N, 17º15"E). The 137Cs activity concentration was measured in prepared mycelia and corresponding soil layers. Various extraction procedures were used to study the retention and binding of 137Cs in Of/Oh and Ah/B horizons of forest soil. 137Cs was also extracted from the fruit bodies and mycelia of fungi. The fungal mycelium biomass was estimated and the percentage of the total inventory of 137Cs bound in mycelia in the Ukrainian and Swedish forests was calculated. The estimated fungal biomass in Ukrainian forests varied from 0.07 to 70.4 mg g-1 soil, in Swedish forests between 3.6 and 19. 4 mg g-1 soil. Between 0.5 to 50 % of the total 137Cs activity in the 0-10 cm soil profile was retained in the fungal mycelia. The 137Cs activity concentration in mycelia was thus higher than that found in soil, and 137Cs activity concentrations in the fruit bodies was higher than that in the mycelium. The survey study revealed that a major part, around 50 % of the plant-available 137Cs in forest soil, was retained in the fungal mycelium. The most probable sources of 137Cs for fungal mycelia and fruit bodies of fungi were found to be water soluble substances, humic matter, hemicellulose and cellulose.

Authors/Creators:Vinichuk, Mykhaylo
Title:Radiocaesium in the fungal compartment of forest ecosystems
Year of publishing :November 2003
Volume:434
Number of Pages:48
Papers/manuscripts:
NumberReferences
ALLI. Vinichuk M. & Johanson K. J. 2003. Accumulation of 137Cs by Fungal Mycelium in Forest Ecosystems of Ukraine. Journal of Environmental Radioactivity, 64, 27-43. II. Vinichuk M., Johanson K. J. & Taylor A.S.F. 2003. 137Cs in the Fungal Compartment of Swedish Forest Soils. The Science of the Total Environment. (In press). III. Vinichuk M., Johanson K. J., Rosén K & Nilsson I. 2003. Role of the Fungal Mycelium in the Retention of Radiocaesium in Forest Soils. Journal of Environmental Radioactivity. Submitted. IV. Vinichuk M., Johanson K. J. & Dolgilevich M. 2003. Sources of 137Cs Uptake by Fungal Mycelium in Forest Ecosystems of Ukraine. Reports of the National Academy of Sciences of Ukraine, 1, 180-185. (In Russian). Paper is translated into English in full. V. Vinichuk M., Johanson K. J. & Dolgilevich M. Sources of 137Cs Uptake by Fruiting Bodies of Fungi in Forest Ecosystems of Ukraine. 2003. Reports of the National Academy of Sciences of Ukraine, 4, 172-176. (In Russian). Paper is translated into English in full.
Place of Publication:Uppsala
ISBN for printed version:91-576-6478-1
ISSN:1401-6249
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:T Pollution > T01 Pollution
P Natural resources > P33 Soil chemistry and physics
Subjects:Not in use, please see Agris categories
Agrovoc terms:bioavailability, radioisotopes, forest litter, organic matter, residues, mycelium, radioactive contamination, caesium, sweden, ukraine
Keywords:bioavailability, biochemical fractions, litter, organic matter, 137Cs, residual fraction, transfer factor
URN:NBN:urn:nbn:se:slu:epsilon-100
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-100
ID Code:391
Department:(NL, NJ) > Dept. of Soil Sciences
Deposited By: Mykhaylo Vinichuk
Deposited On:12 Nov 2003 00:00
Metadata Last Modified:02 Dec 2014 10:04

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