A δ 2 H Isoscape of blackberry as an example application for determining the geographic origins of plant materials in New Zealand

[摘要] In this investigation, two previously reported precipitation δ 2 H isoscapes for New Zealand were used to develop a δ 2 H isoscape for blackberry ( Rubus sp .) leaf. These isoscapes were calibrated using the measured δ 2 H values of 120 authentic blackberry leaf samples collected from across the country. A regression model based on environmental variables available for New Zealand was also determined to predict δ 2 H values measured from blackberry leaves without initially modelling the precipitation δ 2 H values. The three models were compared for their accuracy and precision when assigning 10 samples of blackberry leaves for their geographic location based on their measured δ 2 H values. One of the models based on a precipitation isoscape was similar in accuracy and precision of assignment to the model determined from the environmental variables and provides an approach for determining valid isoscapes for future plant materials.

[学科分类] 急救医学