A bioavailable strontium (87Sr/86Sr) isoscape for Aotearoa New Zealand: Implications for food forensics and biosecurity.

Autor: Kramer RT; Department of Anatomy, University of Otago, Dunedin, Aotearoa New Zealand., Kinaston RL; Department of Anatomy, University of Otago, Dunedin, Aotearoa New Zealand.; BioArch South, Waitati, Aotearoa New Zealand., Holder PW; Bio-Protection Research Centre, Lincoln University, Canterbury, Aotearoa New Zealand., Armstrong KF; Bio-Protection Research Centre, Lincoln University, Canterbury, Aotearoa New Zealand., King CL; Department of Anatomy, University of Otago, Dunedin, Aotearoa New Zealand., Sipple WDK; Department of Anthropology, California State University, Chico, California, United States of America., Martin AP; GNS Science, Dunedin, Aotearoa New Zealand., Pradel G; GNS Science, Lower Hutt, Aotearoa New Zealand., Turnbull RE; GNS Science, Dunedin, Aotearoa New Zealand., Rogers KM; GNS Science, Lower Hutt, Aotearoa New Zealand., Reid M; Centre for Trace Element Analysis, University of Otago, Dunedin, Aotearoa New Zealand.; Department of Chemistry, University of Otago, Dunedin, Aotearoa New Zealand., Barr D; Centre for Trace Element Analysis, University of Otago, Dunedin, Aotearoa New Zealand., Wijenayake KG; Department of Chemistry, University of Otago, Dunedin, Aotearoa New Zealand., Buckley HR; Department of Anatomy, University of Otago, Dunedin, Aotearoa New Zealand., Stirling CH; Centre for Trace Element Analysis, University of Otago, Dunedin, Aotearoa New Zealand.; Department of Geology, University of Otago, Dunedin, Aotearoa New Zealand., Bataille CP; Department of Earth and Environmental Sciences, University of Ottawa, Ontario, Canada.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2022 Mar 16; Vol. 17 (3), pp. e0264458. Date of Electronic Publication: 2022 Mar 16 (Print Publication: 2022).
DOI: 10.1371/journal.pone.0264458
Abstrakt: As people, animals and materials are transported across increasingly large distances in a globalized world, threats to our biosecurity and food security are rising. Aotearoa New Zealand is an island nation with many endemic species, a strong local agricultural industry, and a need to protect these from pest threats, as well as the economy from fraudulent commodities. Mitigation of such threats is much more effective if their origins and pathways for entry are understood. We propose that this may be addressed in Aotearoa using strontium isotope analysis of both pests and products. Bioavailable radiogenic isotopes of strontium are ubiquitous markers of provenance that are increasingly used to trace the origin of animals and plants as well as products, but currently a baseline map across Aotearoa is lacking, preventing use of this technique. Here, we have improved an existing methodology to develop a regional bioavailable strontium isoscape using the best available geospatial datasets for Aotearoa. The isoscape explains 53% of the variation (R2 = 0.53 and RMSE = 0.00098) across the region, for which the primary drivers are the underlying geology, soil pH, and aerosol deposition (dust and sea salt). We tested the potential of this model to determine the origin of cow milk produced across Aotearoa. Predictions for cow milk (n = 33) highlighted all potential origin locations that share similar 87Sr/86Sr values, with the closest predictions averaging 7.05 km away from their true place of origin. These results demonstrate that this bioavailable strontium isoscape is effective for tracing locally produced agricultural products in Aotearoa. Accordingly, it could be used to certify the origin of Aotearoa's products, while also helping to determine if new pest detections were of locally breeding populations or not, or to raise awareness of imported illegal agricultural products.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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