BIOL 312 Lecture Notes - Lecture 26: Ecological Niche, Alkaloid, Field Experiment
14 Dec 2017
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Document Summary
Major determinants of host range include phylogeny, host stage attack, ecological niche attacked (e. g. _________________) Diversity of fruitflies that specialized on tropical cucumbers (from herbivory lecture). Interactions between parasites and prey increase niche diversity in a tropical community: 14 fly species and 18 parasitoid species from 2 species of tropical cucumber. Reared individuals (either flies, wasps emerged use dna of wasps inside flies who fought off a parasitoid). Many flies specialize on one plant species + flower type. Most wasp species specialize on one fly species. Many hidden lethal interactions wasps that appear to have oviposited in the wrong" fly (wasp died). Host defenses: behavioural, including avoidance, grooming, behavioural fever, medication. Egg stacking: mothers modify eggs into shields to protect offspring from parasitism. There is no fertilized embryo in top egg it is protecting fertilized egg underneath. If they don"t see wasps (or other parasitoids), mothers will not stack their eggs.
