EESA01H3 Lecture Notes - Lecture 11: Allopatric Speciation, Sea Level Rise, Plate Tectonics
14 Dec 2015
School
Department
Course
Professor
Document Summary
Ees - lecture 11 - biodiversity and conservation. Biodiversity or biological diversity is the total variety of all organisms in an area. Takes into account the diversity of species, their genes, their populations, habitats, and communities. Scientists have described about 1. 8 million different species, by many more (possibly up to. 100 million, but likely closer to 14 million) remain to be discovered. New species come to be by the process of speciation. This can happen in a number of ways, but the main way is allopatric speciation: The emergence of a new species as a result of the physical separation of populations over some geographic distance. Single species in an area where something happened and that species became geographically separated. Could be due to tectonic plate shift, flooding where water is now separating it. Now the population exists in different places for a long time and have different stressors so evolve.
