Professor Nick Cutter (![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
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fandomhigh2023-03-17 09:41 pm
itsananomaly) wrote in fandomhigh2023-03-17 09:41 pm
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An Introduction to Zoology - Friday, 1st Period
“Last week, we looked at the Cambrian Explosion and the impact that the explosion of diversity had on early evolution for the animal kingdom and now we’re going to look at the opposite end and look at what was responsible for the end of the Cambrian Explosion,” Cutter began that week’s lecture as he began to hand usual his stack of notes.
“At the end of the Cambrian Explosion, there was a mass extinction event that became the largest mass extinction that the Earth has ever known, this occurred at the end of the Permian Period and was responsible for wiping out 90 percent of life at the time,”
“The Permian Extinction was responsible for wiping out 95 percent of marine species and 70 percent of terrestrial species,” he continued, “and this is where the trilobites from last week come in since this is where they met their end,”
“To give an idea of just how long the trilobites did last, the Cambrian Explosion took place roughly 538 million years ago and the Permian Extinction Event happened roughly between 299 million to 252 million years ago, so Trilobites lived for nearly 300 million years,”
“While it was mostly marine invertebrates that were wiped out, the Permian Extinction also saw aquatic vertebrates, including the acanthodian, which are believed to be the earliest jawed fishes were wiped out,”
“In terms of the Terrestrial species that were wiped out these include the pelycosaurs and Moschops and there were also numerous insect families that were lost at this time,”
“It is believed that causes for the Permian Extinction were due to the nutrient cycle being disrupted by biological and physical causes and this includes changes in the temperate and changes to the carbon cycle,”
“For next week, I’d like you work on a report on one of the species that were lost in the Permian Extinction,”
“At the end of the Cambrian Explosion, there was a mass extinction event that became the largest mass extinction that the Earth has ever known, this occurred at the end of the Permian Period and was responsible for wiping out 90 percent of life at the time,”
“The Permian Extinction was responsible for wiping out 95 percent of marine species and 70 percent of terrestrial species,” he continued, “and this is where the trilobites from last week come in since this is where they met their end,”
“To give an idea of just how long the trilobites did last, the Cambrian Explosion took place roughly 538 million years ago and the Permian Extinction Event happened roughly between 299 million to 252 million years ago, so Trilobites lived for nearly 300 million years,”
“While it was mostly marine invertebrates that were wiped out, the Permian Extinction also saw aquatic vertebrates, including the acanthodian, which are believed to be the earliest jawed fishes were wiped out,”
“In terms of the Terrestrial species that were wiped out these include the pelycosaurs and Moschops and there were also numerous insect families that were lost at this time,”
“It is believed that causes for the Permian Extinction were due to the nutrient cycle being disrupted by biological and physical causes and this includes changes in the temperate and changes to the carbon cycle,”
“For next week, I’d like you work on a report on one of the species that were lost in the Permian Extinction,”
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