The distribution of Cs-137, K, Rb and Cs in plants in a Sphagnum-dominated peatland in eastern central Sweden
2010 (English)In: Journal of Environmental Radioactivity, ISSN 0265-931X, E-ISSN 1879-1700, Vol. 101, no 2, 170-176 p.Article in journal (Refereed) Published
We record the distribution of Cs-137, K, Rb and Cs within individual Sphagnum plants (down to 20 cm depth) as well as Cs-137 in vascular plants growing on a peatland in eastern central Sweden. In Calluna vulgaris Cs-137 was mainly located within the green parts, whereas Andromeda polifolia. Eriophorum vaginatum and Vaccinium oxycoccos showed higher Cs-137 activity in roots. Carex rostrata and Menyanthes trifoliata showed variable distribution of Cs-137 within the plants. The patterns of Cs-137 activity concentration distribution as well as K, Rb and Cs concentrations within individual Sphagnum plants were rather similar and were usually highest in the capitula and/or in the subapical segments and lowest in the lower dead segments, which suggests continuous relocation of those elements to the actively growing apical part. The Cs-137 and K showed relatively weak correlations, especially in capitula and living green segments (0-10 cm) of the plant (r = 0.50). The strongest correlations were revealed between Cs-137 and Rb (r = 0.89), and between Cs-137 and stable Cs (r = 0.84). This suggests similarities between Cs-137 and Rb in uptake and relocation within the Sphagnum, but that Cs-137 differs from K.
Place, publisher, year, edition, pages
2010. Vol. 101, no 2, 170-176 p.
Fen, Sphagnum, Uptake, Vascular plant
IdentifiersURN: urn:nbn:se:uu:diva-147704DOI: 10.1016/j.jenvrad.2009.10.003ISI: 000274496300012PubMedID: 19889484OAI: oai:DiVA.org:uu-147704DiVA: diva2:400750