BI111 Lecture Notes - Lecture 31: Monarch Butterfly, Cardiac Glycoside, Aposematism
Document Summary
Several ways to describe this diversity in ways that integrate information on species richness and relative abundances: are there desirable" characteristics of communities. Shannons diversity index (not on final exam: accounts for both abundance and evenness of the species present. Genetically-based, reciprocal adaptions in species that interact ecologically: predation- gain & loss, herbivory- gain & loss, competition- gain, loss, commensalism- gain, unaffect, mutualism- gain, gain, parasitism- gain, loss. Other types of species have adaptations that looks dangerous but actually isn"t. Monarchs & viceroys: (cid:0) monarch butterflies are poisonous/ unpalatable to predators as they retain cardiac glycosides from the milkweed consume as larvae. Viceroy larvae feed on trees such as willows, poplars and cottonwoods which produce salicylic acid (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) (cid:0) Concept to visualize populations resource use: overlap shows interspecies competition, fundamental niche. Species could live in this environment but it actually could not exist: realized niche.
