Karyne Rogers | Institute of Geological & Nuclear Sciences (original) (raw)

Papers by Karyne Rogers

Research paper thumbnail of A national isotope survey to define the sources of nitrate contamination in New Zealand freshwaters

Journal of Hydrology

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Research paper thumbnail of Interpreting past trophic ecology of a threatened alpine parrot, kea Nestor notabilis, from museum specimens

Journal of Animal Ecology

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Research paper thumbnail of Salt accumulations in ancient Antarctic soils

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Research paper thumbnail of Feeding environments of New Zealand

The likely feeding environments of individuals from each of the three populations of New Zealand’... more The likely feeding environments of individuals from each of the three populations of New Zealand’s extinct merganser Mergus australis were interpreted from stable isotope ratios of carbon (13C/12C) and nitrogen (15N/14N) in fossil bones and tissue from preserved skins. Analyses of feather and claws from 10 specimens from Auckland Islands indicated the birds fed predominantly on marine prey but that some freshwater-sourced foods may also have been consumed. Stable isotope values from three bones of mergansers from Chatham Island strongly suggest a marine feeding habit while those from two mainland New Zealand bones indicated the birds fed mostly in fresh water. Merganser bones found at a New Zealand lake (Poukawa) suggest this species occupied mainland New Zealand’s fresh waters at the time of first human settlement.

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Research paper thumbnail of 干潟の食物網と汚染を調べる--安定同位体と重金属濃度の利用 (特集 沿岸生態系を調べる多様な視点)

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Research paper thumbnail of Application of stable isotopes in ecological research : it's all elemental

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Research paper thumbnail of Using Stable Isotopes to Detect Land Use Change and Nitrogen Sources in Aquatic Systems

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Research paper thumbnail of Food web reconstruction through isotopic compositions of fossil faeces: Insights into the ecology of a late Barremian freshwater ecosystem (Las Hoyas, Cuenca, Spain)

Cretaceous Research, 2019

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Research paper thumbnail of A Review of Critical Element Concentrations in High Enthalpy Geothermal Fluids in New Zealand

Resources, May 29, 2023

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Research paper thumbnail of A preliminary elemental and isotopic investigation to develop authentication tools for Chinese Ganoderma lucidum

Food Control

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Research paper thumbnail of Geographical Origin Authentication of Edible Chrysanthemum morifolium Ramat. (Hangbaiju) Using Stable Isotopes

Separations

Chrysanthemum morifolium Ramat., known as Hangbaiju (HBJ), is a high-value edible, medicinal prod... more Chrysanthemum morifolium Ramat., known as Hangbaiju (HBJ), is a high-value edible, medicinal product where the flowers are infused in hot water and drunk as tea. Its quality and efficacy are closely related to its geographical origin. Consequently, it is vulnerable to fraudulent substitution by other lower-value Chrysanthemum products. In this study, cultivation (variety and different growth stages) and isotopic fractionation between the flower, stem, and leaf were studied. Samples from four different HBJ varieties were characterized using stable isotopes (δ13C, δ15N, δ2H, δ18O, %C, and %N) across three producing regions in Zhejiang province, China. The results showed that there were no significant differences in stable isotopic compositions for different HBJ varieties, but there were significant differences for different plant tissues (flower, stem, leaf, etc.). Furthermore, the stable isotopic composition altered dramatically at different growth stages. The δ15N (r = 0.6809) and δ...

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Research paper thumbnail of Soil pollution driven by duration of urbanisation and dwelling quality in urban areas: An example from Auckland, New Zealand

Applied Geochemistry

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Research paper thumbnail of Stable isotope and elemental profiles determine geographical origin of saffron from China and Iran

Food Chemistry

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Research paper thumbnail of Predicting isoscapes based on an environmental similarity model for the geographical origin of Chinese rice

Food Chemistry

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Research paper thumbnail of Geographical origin modeling of Chinese rice using stable isotopes and trace elements

Food Control

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

PLOS ONE, 2022

As people, animals and materials are transported across increasingly large distances in a globali... more 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 ...

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Research paper thumbnail of A stable isotope and chemometric framework to distinguish fresh milk from reconstituted milk powder and detect potential extraneous nitrogen additives

Journal of Food Composition and Analysis, 2022

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Research paper thumbnail of Prediction modeling of isoscapes for stable isotopes in China’s rice based on environmental similarity

Rice quality is directly related to human health, so it is important to have traceability systems... more Rice quality is directly related to human health, so it is important to have traceability systems that can trace inferior or contaminated rice back to its geographical origin. This ensures farming practices in substandard regions become better regulated to improve rice quality, origin labelling and consumer trust. However, tracing the origin of rice on the marketplace requires an accurate database benchmarking the isotope distribution over areas of rice production. Large stable isotope data sets can be used to determine the geographical origin of rice through predictive isoscape models. This study presents the first rice isoscape based on environmental similarity to predict the geospatial distribution of δ13C, δ2H and δ18O values of Chinese rice and provides uncertainty at every location such prediction is made. For this study, 794 rice samples were collected in 2017 from primary rice production regions of China. An independent verification shows that the predicted isotope distribut...

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Research paper thumbnail of Odds and Ends, or, All That’s Left to Print

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Research paper thumbnail of Chapter 13: Odds and Ends, or, All thats left to printIndex

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Research paper thumbnail of A national isotope survey to define the sources of nitrate contamination in New Zealand freshwaters

Journal of Hydrology

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Research paper thumbnail of Interpreting past trophic ecology of a threatened alpine parrot, kea Nestor notabilis, from museum specimens

Journal of Animal Ecology

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Research paper thumbnail of Salt accumulations in ancient Antarctic soils

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Feeding environments of New Zealand

The likely feeding environments of individuals from each of the three populations of New Zealand’... more The likely feeding environments of individuals from each of the three populations of New Zealand’s extinct merganser Mergus australis were interpreted from stable isotope ratios of carbon (13C/12C) and nitrogen (15N/14N) in fossil bones and tissue from preserved skins. Analyses of feather and claws from 10 specimens from Auckland Islands indicated the birds fed predominantly on marine prey but that some freshwater-sourced foods may also have been consumed. Stable isotope values from three bones of mergansers from Chatham Island strongly suggest a marine feeding habit while those from two mainland New Zealand bones indicated the birds fed mostly in fresh water. Merganser bones found at a New Zealand lake (Poukawa) suggest this species occupied mainland New Zealand’s fresh waters at the time of first human settlement.

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Research paper thumbnail of 干潟の食物網と汚染を調べる--安定同位体と重金属濃度の利用 (特集 沿岸生態系を調べる多様な視点)

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Research paper thumbnail of Application of stable isotopes in ecological research : it's all elemental

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Using Stable Isotopes to Detect Land Use Change and Nitrogen Sources in Aquatic Systems

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Food web reconstruction through isotopic compositions of fossil faeces: Insights into the ecology of a late Barremian freshwater ecosystem (Las Hoyas, Cuenca, Spain)

Cretaceous Research, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Review of Critical Element Concentrations in High Enthalpy Geothermal Fluids in New Zealand

Resources, May 29, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A preliminary elemental and isotopic investigation to develop authentication tools for Chinese Ganoderma lucidum

Food Control

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geographical Origin Authentication of Edible Chrysanthemum morifolium Ramat. (Hangbaiju) Using Stable Isotopes

Separations

Chrysanthemum morifolium Ramat., known as Hangbaiju (HBJ), is a high-value edible, medicinal prod... more Chrysanthemum morifolium Ramat., known as Hangbaiju (HBJ), is a high-value edible, medicinal product where the flowers are infused in hot water and drunk as tea. Its quality and efficacy are closely related to its geographical origin. Consequently, it is vulnerable to fraudulent substitution by other lower-value Chrysanthemum products. In this study, cultivation (variety and different growth stages) and isotopic fractionation between the flower, stem, and leaf were studied. Samples from four different HBJ varieties were characterized using stable isotopes (δ13C, δ15N, δ2H, δ18O, %C, and %N) across three producing regions in Zhejiang province, China. The results showed that there were no significant differences in stable isotopic compositions for different HBJ varieties, but there were significant differences for different plant tissues (flower, stem, leaf, etc.). Furthermore, the stable isotopic composition altered dramatically at different growth stages. The δ15N (r = 0.6809) and δ...

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Research paper thumbnail of Soil pollution driven by duration of urbanisation and dwelling quality in urban areas: An example from Auckland, New Zealand

Applied Geochemistry

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Research paper thumbnail of Stable isotope and elemental profiles determine geographical origin of saffron from China and Iran

Food Chemistry

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Predicting isoscapes based on an environmental similarity model for the geographical origin of Chinese rice

Food Chemistry

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geographical origin modeling of Chinese rice using stable isotopes and trace elements

Food Control

Bookmarks Related papers MentionsView impact

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

PLOS ONE, 2022

As people, animals and materials are transported across increasingly large distances in a globali... more 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 ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A stable isotope and chemometric framework to distinguish fresh milk from reconstituted milk powder and detect potential extraneous nitrogen additives

Journal of Food Composition and Analysis, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Prediction modeling of isoscapes for stable isotopes in China’s rice based on environmental similarity

Rice quality is directly related to human health, so it is important to have traceability systems... more Rice quality is directly related to human health, so it is important to have traceability systems that can trace inferior or contaminated rice back to its geographical origin. This ensures farming practices in substandard regions become better regulated to improve rice quality, origin labelling and consumer trust. However, tracing the origin of rice on the marketplace requires an accurate database benchmarking the isotope distribution over areas of rice production. Large stable isotope data sets can be used to determine the geographical origin of rice through predictive isoscape models. This study presents the first rice isoscape based on environmental similarity to predict the geospatial distribution of δ13C, δ2H and δ18O values of Chinese rice and provides uncertainty at every location such prediction is made. For this study, 794 rice samples were collected in 2017 from primary rice production regions of China. An independent verification shows that the predicted isotope distribut...

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Research paper thumbnail of Odds and Ends, or, All That’s Left to Print

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chapter 13: Odds and Ends, or, All thats left to printIndex

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