BIO 415 Lecture Notes - Lecture 8: Island, Biogeography, Species Richness
Document Summary
Madagascar, new zealand, british, sri lanka, newfoundland, philippines. Located on a continental shelf and have previous had land connections. Located in deeper waters and were probably never connected to the mainland. Island groups with connections of some islands but not others, to the mainland. Islands most recently connected to mainland in the pleistocene. Insular endemics are well differentiated from their continental ancestors. Support species closely related to mainland species. Not much genetic differentiation between islands and continent relatives. Representative samples of floras and faunas of nearby continent. Biotas of limited taxonomic richness, not only at species level but at higher levles. Groups of species more closely related to one another than to any continental form. Not only genentic divergence but also speciation. Oceanic islands are gonna have less islands than continental but more endemic species. So differentiated that they often lost their structures and capacities for dispersal. Source area(size) , source diversity (species richness)
