137Cs availability for soil to understory transfer in different types of forest ecosystems

被引：46
作者：
Fesenko, SV [1 ]
Soukhova, NV
Sanzharova, NI
Avila, R
Spiridonov, SI
Klein, D
Badot, PM
机构：
[1] RIARAE, Obninsk 249020, Kaluga Region, Russia
[2] Swedish Radiat Protect Inst, S-17116 Stockholm, Sweden
[3] Pole Univ Pays Montbeliard, Univ Franche Comte, ISTE, F-25211 Montbeliard, France
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2001年 / 269卷 / 1-3期
关键词：
forest ecosystems; radiocaesium; bioavailability; radionuclide transfer;
D O I：
10.1016/S0048-9697(00)00818-4
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A quantitative analysis of Cs-137 bioavailability in forest soils in the long term after the Chernobyl NPP accident based on a 3-year (1996-1998) investigation is presented. Five forest sites with different trees, composition and properties of soil were studied to identify factors determining radiocaesium transfer to different understory species. The following parameters were investigated:Cs-137 activity concentrations and its speciation in various horizons of forest soil, accumulation of this radionuclide by different species of understory vegetation and distribution of root biomass in the soil profile. It has been shown that one decade after the deposition maximum Cs-137 activity in soil of the experimental sites considered is located in different soil layers dependent on moisture regime, characteristics of litter and soil properties. A linear dependence between aggregated transfer factors for different species and groups of species of understory vegetation and exchangeable and available fractions of radiocaesium in soil was found. The vertical distribution of Cs-137 activity, percentage of exchangeable radiocaesium in each horizon of litter and soil, as well as distribution of root systems (mycelia) over the soil profile are key factors governing variations in the availability of Cs-137 for transfer to all forest understory components. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：87 / 103
页数：17
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