Abstract

The effect of host-plant biochemical relatedness (using needle terpene data) in explaining the variation in macrolepidoptera species richness of Canadian conifers was investigated. Conifer geographic range accounted for 25-35% of the variance in species richness. A total of 61% of species richness variance was explained by adding tree height as a variable. Taxonomic relatedness (number of species per genus) did not explain a significant amount of variance. Five measures of biochemical relatedness were calculated, including number of terpenes and similarity/dissimilarity indices using presence and absence as well as abundance of individual terpenes

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