GEOL 103 Lecture Notes - Lecture 18: Omnivore, Digitigrade, Ungulate
30 May 2018
School
Department
Course
Professor
1
GEOL 103
Spring 2018 AEC Notes
Prof. Davis
5/30/18 (Week 9, Class #18) Wednesday
These will be on the test!!!
● K selected or R selected
○ One is not better than the other
○ K selected
■ Elephants
○ R selected
■ Sea turtles
■ Average lifespan is shorter
■ No parental care
○ Natural selection does not care about you after you reproduce
● Theropods are the only carnivorous dinosaurs
● Isotopes
○ Can’t use carbon isotopes to explain/for everything
■ Must come back to the diagram
■ Lots of plants die off → more light carbon
■ Volcanoes → heavy isotopes
● The fossil record is really incomplete
○ The further you go back in the record, the less you know (less connections you
can make)
● Final exam study session
○ PLC 180
○ Thursday 6/7
find more resources at oneclass.com
find more resources at oneclass.com
2
○ How to study for the exam, test taking skills, and any question you have about
material covered
● Learning objectives
○ Explain the sequence of earth history events at geologic period level
○ Explain organismal evolution by natural selection and provide supporting fossil
evidence
○ Role of life in regulating earth’s air and water
Cenozoic
● Climate through the Cenozoic
○ Palaeocene-Eocene thermal maximum
■ High isotope, high earth temperature, small body size
■ Release of methane from the deep ocean
■ Warming trend! → starts to cool
○ Mid-Eocene Climate Optimum → cooling continues
○ O 1-1 glaciation
■ Continents move, Antarctic ice sheet
■ Northern Hemisphere ice sheets
■ Lower albedo because of positive feedback loop → cooler earth temp
○ Mid-Miocene Climate optimum
■ Warming
■ Grasses!
■ (before now, it was mainly
forests because it was so warm)
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
One is not better than the other. Natural selection does not care about you after you reproduce. Can"t use carbon isotopes to explain/for everything. Lots of plants die off more light carbon. The further you go back in the record, the less you know (less connections you can make) How to study for the exam, test taking skills, and any question you have about material covered. Explain the sequence of earth history events at geologic period level. Explain organismal evolution by natural selection and provide supporting fossil evidence. Role of life in regulating earth"s air and water. High isotope, high earth temperature, small body size. Release of methane from the deep ocean. Lower albedo because of positive feedback loop cooler earth temp. (before now, it was mainly forests because it was so warm) Glacial cycling is caused by the earth"s orbit. = more or less sunlight sometimes, reinforce one another where warm and/or cold periods are created.
