What kind of genetic variation in happy-face spiders was dr. gillespie studying?

The kind of genetic variation in happy-face spiders that Dr, Gillespie was studying is called Polymorphism which includes ecology, morphology and the behavior of the happy-face spiders. Polymorphism is a discontinuous genetic variation that results in the occurrence of several different forms or types of individuals among the members of a single species. The happy-face spider exhibits an array of color patterns on the back of its abdomen, sometimes resembles a smiling face. Despite the variation in colors, all of the happy-face spider; have the same anatomical features, interact in the same ways with their environments and with other organisms, they share the same reproductive behaviors and methods of catching insect prey and also freely mate with one another. The study of protein by scientists in the happy-face spiders revealed that different islands had very different levels of variation which means the dispersal between the island is not very common. 

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.