today: the real hobbits exams returned f 2/19 homework #2 is due m 2/22
TRANSCRIPT
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Today: the real Hobbits
Exams returned F 2/19
Homework #2is due M 2/22
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How might limited resources affect the evolution of a species?
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Human Evolution Fig 34.40
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Human Population GrowthFig 53.22
as of 2/14 at 6pm:6,802,790,917
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Carrying Capacity
exponential growth
stationary phase
Fig 53.12
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What limitsCarrying Capacity?…
Fig 53.12
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Space
…Availability of resources.
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Availability of resources and removal of waste limits carrying capacity Fig 55.4
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Webpages and Articles about Homo floresiensis
(the video) http://www.pbs.org/wgbh/nova/sciencenow/3209/01.html
(longer video) http://video.google.com/videoplay?docid=8604680088784253620(part 1 of 7)
http://ngm.nationalgeographic.com/features/world/asia/georgia/flores-hominids-text
http://www.nature.com/nature/focus/flores/index.html
For updated info (2009):http://www.nature.com/nature/journal/v459/n7243/full/459041a.html
See textbook pg. 765...
The little people of Flores
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H. floresiensis: A new species?
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Asian island of Flores
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Liang Bua where remains were found
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Typical objects found. Tools and bones.
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Artists rendering of H. floresiensis
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floresiensis and sapien skull
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Comparison of size:Pygmy, European, and H. floresiensis
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Pygmy elephant
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What about the tools?Was floresiensis “smart”?
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H. sapien and H. floresiensis brain
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Relative brain to body size
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The shape and size of the brain ofH. floresiensis indicates that it was organized differently than the brain of H. sapiens.
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So…Several individual skeletons were found of a small population ranging in age from ~90,000 – 18,000 years ago. They have relatively small brains, but might have been able to do sophisticated things.
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Homo floresiensis:Are they a distinct species, and if so, how are we related?
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Trait diversity may vary in different populations
57” 65” 73”
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Human Evolution Fig 34.40
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H. floresiensis: A new species?
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Yes: the number of similar individuals, the dates of existence (~90,000–18,000 years old), and the different morphology.
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There is much controversy over H. floresiensis
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Alternate hypotheses and rebuttals:
Skeletons represent humans with brain damage.Skeletons represent humans with severe iodine deficiency: http://dsc.discovery.com/news/2008/03/05/hobbit-human.html
Rebuttal to iodine deficiency: http://johnhawks.net/weblog/fossils/flores/cretin-flores-faq-2008.html
Wrist bones are very different from humans:
http://www.sciencemag.org/cgi/content/abstract/317/5845/1743
There is much controversy over H. floresiensis
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Next: What is ecology...
Exams returnedF 2/19
Homework #2is due M 2/22