Journal: Isotopes in Environmental and Health Studies

Abbreviation

Isot. Environ. Health Stud.

Publisher

Taylor & Francis

Journal Volumes

ISSN

1025-6016
1477-2639

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Publications 1 - 10 of 19
  • Multi-factorial in vivo stable isotope fractionation: causes, correlations, consequences and applications
    Item type: Journal Article
    Schmidt, H.L.; Robins, R.J.; Werner, R.A. (2015)
    Isotopes in Environmental and Health Studies
  • Estimating the spatial distribution of artificial groundwater recharge using multiple tracers
    Item type: Journal Article
    Moeck, Christian; Radny, Dirk; Auckenthaler, Adrian; et al. (2017)
    Isotopes in Environmental and Health Studies
  • ⁶⁷Zn and ¹¹¹Cd labelled green manure to determine the fate and dynamics of zinc and cadmium in soil-fertilizer-crop systems
    Item type: Journal Article
    Künzli, Manja; Dürr-Auster, Thilo; Bracher, Christoph; et al. (2024)
    Isotopes in Environmental and Health Studies
    Isotope source tracing enables to accurately determine the fate of nutrients that are applied with fertilizers to soils. While this approach is well established for major nutrients such as nitrogen, it is not yet established for trace metals. Here, we aimed to determine the fate of the micronutrient zinc (Zn) and the contaminant cadmium (Cd) that were applied with an organic fertilizer to a soil–wheat system. A pot study was conducted in which wheat was grown on an alkaline soil. The soils received green manure and/or soluble Zn fertilizer and were compared with non-fertilized control treatments (n = 4 experimental replicates). The green manure was labelled with the stable isotopes ⁶⁷Zn and ¹¹¹Cd. For an efficient sample throughput, a method was provided and validated to determine enriched stable isotope ratios (⁶⁷Zn:⁶⁶Zn and ¹¹¹Cd:¹¹⁰Cd) and the Zn and Cd concentrations in one analytical run. To this end, single collector ICP-MS analyses and stable isotope mass balances calculations were combined. Applying this method revealed that the addition of green manure increased neither Zn nor Cd concentrations in wheat grains due to biomass dilution effects. Isotope source tracing showed that the largest fraction of these metals in the wheat shoots derived from the soil in all treatments (Zn 87-99 %, Cd 94-98 %). Moreover, the addition of green manure increased the transfer of Zn and Cd from soil to wheat by a factor 1.9 for both elements. This increased transfer was likely related to a nitrogen fertilization effect that increased root and shoot biomass and thereby the soil exploration of the wheat. This study demonstrated how the fate and dynamics of multiple trace metals can be efficiently determined in soil–fertilizer–crop systems using isotope source tracing.
  • Soil matrix tracer contamination and canopy recycling did not impair (CO2)-C-13 plant-soil pulse labelling experiments
    Item type: Journal Article
    Barthel, Matti; Sturm, Patrick; Knohl, Alexander (2011)
    Isotopes in Environmental and Health Studies
  • Changes in δ13C of dark respired CO2 and organic matter of different organs during early ontogeny in peanut plants
    Item type: Journal Article
    Ghashghaie, Jaleh; Badeck, Franz W.; Girardin, Cyril; et al. (2015)
    Isotopes in Environmental and Health Studies
  • Source partitioning of atmospheric methane using stable carbon isotope measurements in the Reuss Valley, Switzerland
    Item type: Journal Article
    Stieger, Jacqueline; Bamberger, Ines; Siegwolf, Rolf T.W.; et al. (2019)
    Isotopes in Environmental and Health Studies
  • Nitrate and ammonium differ in their impact on δ13C of plant metabolites and respired CO2 from tobacco leaves
    Item type: Journal Article
    Ghiasi, Shiva; Lehmann, Marco M.; Badeck, Franz-Werner; et al. (2021)
    Isotopes in Environmental and Health Studies
    The carbon isotopic composition (δ13C) of foliage is often used as proxy for plant performance. However, the effect of (Formula presented.) vs. (Formula presented.) supply on δ13C of leaf metabolites and respired CO2 is largely unknown. We supplied tobacco plants with a gradient of (Formula presented.) to (Formula presented.) concentration ratios and determined gas exchange variables, concentrations and δ13C of tricarboxylic acid (TCA) cycle intermediates, δ13C of dark-respired CO2, and activities of key enzymes nitrate reductase, malic enzyme and phosphoenolpyruvate carboxylase. Net assimilation rate, dry biomass and concentrations of organic acids and starch decreased along the gradient. In contrast, respiration rates, concentrations of intercellular CO2, soluble sugars and amino acids increased. As (Formula presented.) decreased, activities of all measured enzymes decreased. δ13C of CO2 and organic acids closely co-varied and were more positive under (Formula presented.) supply, suggesting organic acids as potential substrates for respiration. Together with estimates of intra-molecular 13C enrichment in malate, we conclude that a change in the anaplerotic reaction of the TCA cycle possibly contributes to 13C enrichment in organic acids and respired CO2 under (Formula presented.) supply. Thus, the effect of (Formula presented.) vs. (Formula presented.) on δ13C is highly relevant, particularly if δ13C of leaf metabolites or respiration is used as proxy for plant performance. (© 2020 Informa UK Limited, trading as Taylor & Francis Group.)
  • Multi element (C, H, O) stable isotope analysis for the authentication of balsamic vinegars
    Item type: Journal Article
    Werner, Roland A.; Roßmann, Andreas (2015)
    Isotopes in Environmental and Health Studies
  • The effect of physical back-diffusion of 13CO2 tracer on the coupling between photosynthesis and soil CO2 efflux in grassland
    Item type: Other Journal Item
    Burri, Susanne; Sturm, Patrick; Baur, Thomas; et al. (2014)
    Isotopes in Environmental and Health Studies
  • Tightly bound soil water introduces isotopic memory effects on mobile and extractable soil water pools
    Item type: Journal Article
    Newberry, Sarah L.; Prechsl, Ulrich E.; Pace, Matthew; et al. (2017)
    Isotopes in Environmental and Health Studies
Publications 1 - 10 of 19