Building a reference indicator model using co-kriging interpolation to determine the geographical origin of the flighted spongy moth complex in China  

作　　者：Zeshi Qin Yixia Cao Yan Wang Jun Ding Wuja Xia Juan Shi 

机构地区：[1]Sino-French Joint Laboratory for Invasive Forest Pests in Eurasia,Beijing Forestry University,Beijing,China [2]Beijing Key Laboratory for Forest Pest Control,Beijing Forestry University,Beijing,China [3]China Certification and Inspection Group Beijing Co.,Ltd.,Beijing,China [4]Tibetan Autonomous Prefecture of Huangnan Forestry and Grassland Administration,Qinghai,China

出　　处：《Insect Science》2024年第5期1603-1616,共14页昆虫科学（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China(grant number 31770687).

摘　　要：Using stable isotopes to detect and analyze the geographical origin of insects represents an important traceability technology,which requires a rich isotope database.In this study,we representatively sampled the Chinese provinces where flighted spongy moth complex(FSMC)has been reported and,for the first time,used co-kriging interpolation to predict the distribution patterns of FSMC s13C values in the main distribution areas.From 2020 to 2022,we set up 60 traps in 12 provinces and cities in China and collected 795 FSMCs.Then,6 main climatic factors were obtained by multi-collinearity screening from 21 types of meteorological data collected at the sample plots,and a correlation analysis was carried out by combining longitude,latitude,and altitude data with the s13C val-ues of FSMC.Next,we performed a co-kriging interpolation using the 2 climatic factors with the highest correlation(isothermality and altitude)and the s13C values of FSMC.A cross-validation was performed to systematically test 11 candidate models and select the best semi-variogram model(Exponential"),which was then used to build a co-kriging interpolation model.The geographical distribution patterns of the FSMC s13C values ob-tained from the 2 interpolation models(i.e.,interpolated with isothermality and altitude,respectively)were almost the same.Moreover,the s13C values varied significantly at the regional scale,showing regular changes in spatial distribution.Overall,the reference indi-cator map of the 813C values generated from stable isotopes can be used to greatly improve the efficiency of discrimination analyses on the geographical origin of FSMC.

关 键 词：C stable isotope environmental similarity flighted spongy moth complex(FSMC) geographical origin 

分 类 号：Q968[生物学—昆虫学]