EEMB 131 Lecture Notes - Lecture 18: Western Ghats, Siberian Traps, Devonian
13 Mar 2018
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Number of species decline as magnitude increases. 5 mass extinctions stand out because it is out of the 95% confident interval of other extinction events. Groups with high turnover rates (for both speciation and extinction) tend to decline over time, while low-turnover lineages tend to persist: purpose. Something killed everyone- se (clade/ bloc model) Make list of everything that went extinct and those that didn"t. Cool down of hot rocks on the bottom of the sea level led to sea level decline. Area of seabed where the sea is relatively shallow compared to open ocean. Break up of pangaea created siberian traps (the largest set of volcanic en. Break up of pangaea created siberian traps (the largest set of volcanic eruptions in recorded geologic history) and western ghats in india. Applying the grid model: clade based extinction. Eliminate all members of some lineages while leaving other lineages intact. Some specific species are targeted selective: bloc based extinction.
