Abstract
To measure influences of environmental factors and population on Living Tool Diversity (LTD) in 10 islands of Shinan-gun, the number of living tools was determined. Correlation analysis, simple linear regression analysis, and principal component analysis (PCA) were performed. Results showed that coastline length and population were positively related to LTD and thus, island size and human dynamics. PCA results showed that living tools could be classified into four groups and that islands could be classified into three groups. Living tool-environmental biplot showed that: 1) the first group composed of AG tools was related to human dynamics as PO, CL, and IA; 2) the second group composed of FI tools was related to island biogeography as DM and PS; 3) the third group composed of FP tools was related to geographical coordinates as LA and LO; 4) the fourth group composed of TA, CO, BR, FS, PM, and CT had weaker correlations than other groups. Island-environmental biplot showed that: 1) the first group composed of R7 and R9 was related to AG and FP tools; 2) the second group composed of R2 was related to FI tools; and 3) the third group composed of R3, R6, R8, and R10 was related to TA, CO, BR, FS, PM, and CT tools. Regression and PCA models accounted for most of the variation of LTD by population and environmental factors across Shinan-gun islands of South Korea.
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