BI111 Lecture Notes - Lecture 12: Monarch Butterfly, Elasmotherium, Character Displacement
Document Summary
Shannon"s diversity index: accounts for both abundance and evenness of the species present. *talk about what would be expected at high diversity, high species richness indicate about nature of composition of the community. Genetically-based, reciprocal adaptations in species that interact ecologically. If snakes that aren"t venomous mimic the venomous snake they will have greater survival rate because they. Monarch butterflies (danaus plexippus) are poisonous/ unpalatable to predators as they retain cardiac glycosides from the milkweed consumed as larvae. Viceroy (limentis archippus) larvae feeds on trees such as willows, poplars and cottonwoods which produce salicylic acid. Concept to visualize population"s resource use: fundamental niche, realized niche. Field studies can demonstrate competition between two species. Two or more species using same limiting resource(s) Interference competition: one species harms another species directly. Exploitative competition: one species reduces resource availability to others. Conflict and competition reduced when different species use different resources or in different ways.
