Inter-taxa differences in root uptake of 103/106Ru by plants

Willey, Neil; Fawcett, Kathy

doi:10.1016/j.jenvrad.2005.09.002

Cited by 19 publications

(15 citation statements)

References 25 publications

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“…Phylogenetic effects on 99 Tc uptake indicate that, in general, plants on the Monocot clades take up 99 Tc to lower concentrations than those on the Eudicot clades. This is also the case for Ca , 36 Cl (Willey and Fawcett, 2005), 137 Cs , 90 Sr (Willey and Fawcett, 2006a), 109 Ru (Willey and Fawcett, 2006b) and 60 Co (Willey and Wilkins, 2008), and seems to confirm a general pattern of low shoot concentration of many radioisotopes on the Monocot clades. This effect can be visualised if CF for species are plotted using APG II in linear order (Haston et al, 2007) (Fig.…”

Section: Discussionsupporting

confidence: 70%

“…The implications of advances in soil science and molecular biology to soil and intra-species effects have been reviewed (Bennett and Willey, 2003) but there have been few analyses of inter-species effects. A phylogenetic perspective has been useful to understanding inter-species effects in soil-to-plant transfer of inorganic contaminants including metals (Broadley et al, 2001), 137 Cs (Broadley et al, 1999;, 36 Cl (Willey and Fawcett, 2005), 90 Sr (Willey and Fawcett, 2006a), 109 Ru (Willey and Fawcett, 2006b), 35 S (Willey and Wilkins, 2006) and 60 Co (Willey and Wilkins, 2008), but has not yet been reported for 99 Tc. Such an analysis of inter-species effects on 99 Tc transfer could complement established knowledge of soil and intra-species effects on the soilto-plant transfer of 99 Tc and other radioisotopes.…”

Section: Introductionmentioning

confidence: 99%

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The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc

Willey

Tang

McEwen

et al. 2010

Journal of Environmental Radioactivity

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Section: Discussionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc

Willey

Tang

McEwen

et al. 2010

Journal of Environmental Radioactivity

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“…Soil-to-plant transfer of elements of radiological interest has been related to plant evolutionary history, or phylogeny, for Cs (Broadley et al, 1999;Willey et al, 2005), Sr (Willey and Fawcett, 2005a), Ru (Willey and Fawcett, 2006), Cl (Willey and Fawcett, 2005b), Co (Willey and Wilkins, 2008) and U (Willey, 2010). Such phylogenetic relationships present a potential approach to enable predictions of transfer, with some scientific justification, for taxonomic groups for which there are no data either at the generic or site-specific level (Willey, 2010).…”

Section: Introductionmentioning

confidence: 99%

A new approach to predicting environmental transfer of radionuclides to wildlife: A demonstration for freshwater fish and caesium

Beresford

Yankovich

Fesenko

et al. 2013

Science of The Total Environment

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The NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. AbstractThe application of the concentration ratio (CR) to predict radionuclide activity concentrations in wildlife from those in soil or water has become the widely accepted approach for environmental assessments. Recently both the ICRP and IAEA have produced compilations of CR values for application in environmental assessment. However, the CR approach has many limitations most notably that transfer of most radionuclides is largely determined by site-specific factors (e.g. water or soil chemistry). Furthermore, there are few, if any, values for many radionuclide-organism combinations. In this paper we propose an alternative approach and, as an example, demonstrate and test this for caesium and freshwater fish. Using a Residual Maximum Likelihood (REML) mixed-model regression we analysed a dataset comprising 597 entries for 53 freshwater fish species from 67 sites. The REML analysis generated a mean value for each species on a common scale after REML adjustment taking account of the effect of the inter-site variation. Using an independent dataset, we subsequently test the hypothesis that the REML model outputs can be used to predict radionuclide, in this case radiocaesium, activity concentrations in unknown species from the results of a species which has been sampled at a specific site. The outputs of the REML analysis accurately predicted 137 Cs activity concentrations in different species of fish from 27 Finnish lakes; these data had not been used in our initial analyses. We recommend that this alternative approach be further investigated for other radionuclides and ecosystems.

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“…Soil-to-plant transfer of elements of radiological interest has been related to plant evolutionary history, or phylogeny (Willey, 2010), including for Cs (Broadley et al, 1999;Willey et al, 2005), Sr (Willey and Fawcett, 2005a), Ru (Willey and Fawcett, 2006), Cl (Willey and Fawcett, 2005b) and Co (Willey and Wilkins, 2008) (Fig. 6).…”

Section: An Alternative To the Cr Wo-media Model For Wildlife?mentioning

confidence: 99%

Making the most of what we have: application of extrapolation approaches in radioecological wildlife transfer models

Beresford

Batlle

Yankovich

et al. 2016

Journal of Environmental Radioactivity

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We will never have data to populate all of the potential radioecological modelling parameters required for wildlife assessments. Therefore, we need robust extrapolation approaches which allow us to make best use of our available knowledge. This paper reviews and, in some cases, develops, tests and validates some of the suggested extrapolation approaches. The concentration ratio (CRproduct-diet or CRwo-diet) is shown to be a generic (trans-species) parameter which should enable the more abundant data for farm animals to be applied to wild species. An allometric model for predicting the biological half-life of radionuclides in vertebrates is further tested and generally shown to perform acceptably. However, to fully exploit allometry we need to understand why some elements do not scale to expected values. For aquatic ecosystems, the relationship between log10(a) (a parameter from the allometric relationship for the organism-water concentration ratio) and log(Kd) presents a potential opportunity to estimate concentration ratios using Kd values. An alternative approach to the CRwo-media model proposed for estimating the transfer of radionuclides to freshwater fish is used to satisfactorily predict activity concentrations in fish of different species from three lakes. We recommend that this approach (REML modelling) be further investigated and developed for other radionuclides and across a wider range of organisms and ecosystems. Ecological stoichiometry shows potential as an extrapolation method in radioecology, either from one element to another or from one species to another. Although some of the approaches considered require further development and testing, we demonstrate the potential to significantly improve predictions of radionuclide transfer to wildlife by making better use of available data.

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Inter-taxa differences in root uptake of 103/106Ru by plants

Cited by 19 publications

References 25 publications

The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc

The effects of plant traits and phylogeny on soil-to-plant transfer of 99Tc

A new approach to predicting environmental transfer of radionuclides to wildlife: A demonstration for freshwater fish and caesium

Making the most of what we have: application of extrapolation approaches in radioecological wildlife transfer models

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