GEG 3114 Lecture Notes - Lecture 10: Continental Drift, Seed Dispersal, Genetic Drift
30 Mar 2016
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Document Summary
There are many taxa that follow the same (or similar) distribution patterns. The fossil record is incomplete, so we must extrapolate for partial records using knowledge of geological history, biological tendencies etc. Dispersalism: the population existed in one area, and managed to disperse to the other areas. Oaks began in europe, and managed to disperse to eastern north america, china, 2 current genetic studies show that monkeys arrived in sa from africa after the continents split. There may have been an event that caused a mat of trees, dirt, etc. to cross the ocean to south america, where the survivors could colonise. Vicarience: the population is separated when the continents moved apart. Oaks in one area, and when the continents split the population was divided, and is now found in many areas. The current view is that the current distributions are caused by a combination of vicarience and dispersalism.
