The Sixth Mass Extinction Essential Questions What is extinction Which species have become extinct in modern times What are the characteristics of past mass extinctions How do modern extinction rates compare with natural background rates ID: 477354
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Modern Extinction
The Sixth Mass ExtinctionSlide2
Essential Questions
What is extinction?Which species have become extinct in modern times? What are the characteristics of past mass extinctions? How do modern extinction rates compare with natural (background) rates?
How do human activities result in species extinctions, and what species have become extinct due to human activities?Slide3
Objectives
Define extinction.Cite examples of past mass extinctions and recent
species extinctions.Compare current extinction rates with background extinction rates.
Analyze the connection between recent extinctions and human activities.Cite examples of how human activities have caused species extinctions.Slide4
The World is Singing Video ClipSlide5
The World is Singing
What animal sounds have you heard in real life or in movies?Slide6
Defining extinction
Write your definition of the word “extinction.”
Use the word “extinction” in a sentence.Slide7
What is ?
What are some extinct species you know of?
Try to remember some movies and books about animals that no longer exist on Earth.
extinctionSlide8
Extinct Species
Tyrannosaurus
rexSlide9
Extinct Species
Wooly mammoth
Mammuthus
primigeniusSlide10
Extinct Species
Passenger pigeon
Ectopistes
migratoriusSlide11
Extinct Species
Dodo
Raphus
cucullatusSlide12
The Sound of Extinction
Pick one of the three species you have listed above and write/describe why/how they went extinctSlide13
Understanding Extinction
You will learn about the concept of extinction and obtain evidence
for actual extinctions in Earth’s history and in modern times. Slide14
Mass Extinction Events Video ClipSlide15
Mass Extinction Events
Research online and create a timeline of past mass extinctions.
Look out for:Taxonomic levels used to analyze mass extinctionsDifferent measures of extinction
Percent of taxaExtinction rate (e.g., families per million years)Slide16
Mass Extinction Events
Compare these two graphs, which show mass extinctions over time.Slide17
Mass Extinction Events
Choose a mass extinction event.Slide18
Mass Extinction Events: ResourceSlide19
Mass Extinction Today: Vanishing Species Video ClipSlide20
Mass Extinction Events
Analyze the causes and consequences of one of the five mass extinctions.Compare background rates of extinction with the current rates of extinction.
Research evidence used to estimate extinction rates:The fossil recordSpeciation rates
DiversificationThe Theory of Island BiogeographySlide21
Mass Extinction Events: ResourcesSlide22
Explaining Extinction
Create a resource explaining your chosen mass extinction event.
Your resource should include:Kinds of species that went extinctSeverity of the eventScientific hypotheses that explain the eventSlide23
Case Study Concept Map
With your group:Select a species that has gone extinct in modern times.Create a concept
map or slide to describe the causes and consequences of the extinction.I expect quality work for these two slides.Slide24
Google Slide: ResourcesSlide25
Case Study Concept Map
Include key data in your concept map: Species scientific nameIllustrations or photos if available
Dates of discovery and extinctionBiogeographical dataLocationInitial population sizeEcology and behavior
Causes of extinctionEcological effects of the extinctionPossible actions that may have prevented the extinctionSlide26
Brainstorm! /E.C.
Your mission (should you choose to accept it)!Create a list of activities that publicize
and educate about the Sixth Mass Extinction.
Ensure that your activities:Are feasible and realisticDo not require fundingIdeally could be conducted in a class settingSlide27
Evaluation – Final write up
Write a short passage describing characteristics of past mass extinctions.
Describe how modern extinction rates compare with natural (background) rates.Describe five kinds of human activities that result in species extinctions.List three species that have become extinct due to human activities and the causes of those extinctions
.Slide28
Resources
Data http://evolution.berkeley.edu/evolibrary/images/evo/extinction_graph2.gif
https://www.e-education.psu.edu/earth103/sites/www.e-education.psu.edu.earth103/files/module11/mass_extinctions.png Websites
https://www.e-education.psu.edu/earth103/node/713 http://science.nationalgeographic.com/science/prehistoric-world/mass-extinction/ http://www.bbc.co.uk/nature/extinction_eventshttp://www.pbs.org/wgbh/evolution/library/03/2/l_032_04.html
http://www.ncbi.nlm.nih.gov/pubmed/25159086
http://www.sciencemag.org/content/344/6187/1246752
http://rainforests.mongabay.com/0908.htm
http://facstaff.uwa.edu/jmccall/Evolutionary%20Biology/Extinction.ppt