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Abstract (from SpringerLink) Predation by natural enemies is important for regulating herbivore abundance and herbivory. Theory predicts that complex habitats support more natural enemies, which exert top-down control over arthropods and therefore can reduce herbivory. However, it is unclear if theory developed in other more natural systems similarly apply to predation by vertebrate and invertebrate natural enemies across urban habitats of varying complexity. We used plasticine caterpillar models to assess risk of predation by birds and insects, collected leaf-feeding arthropods, and measured herbivory in willow oak trees (Quercus phellos) in two seasons to determine how predation influenced herbivory across urban...
Data were collected from two laboratory rearing experiments conducted in 2018 of Trichoplusia ni caterpillars that had been parasitized by Copidosoma floridanum parasitoids. In the first experiment, parasitized caterpillars were fed artificial diets spiked with increasing concentrations of the phytochemical xanthotoxin in order to assess the effect of xanthotoxin on parasitoid success. In the second experiment, parasitized caterpillars were switched between diets with differing xanthotoxin concentration, such that all caterpillars experienced the same mean xanthotoxin concentration over their lives, but different treatments experienced different variability in xanthotoxin concentration. Data were recorded on caterpillar...
    map background search result map search result map Data for a lab study of the effects of diet variability on the interactions between a Lepidopteran herbivore and its parasitoid Data for a lab study of the effects of diet variability on the interactions between a Lepidopteran herbivore and its parasitoid