Today: the real Hobbits

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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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Fig 34.40
Human Evolution
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Fig 53.22
Human Population Growth
as of 2/14 at 6pm6,802,790,917
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Fig 53.12
Carrying Capacity
stationary phase
exponential growth
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Fig 53.12
What limits Carrying Capacity?
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Availability of resources.
Space
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Availability of resources and removal of waste
limits carrying capacity
Fig 55.4
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The little people of Flores
See textbook pg. 765...
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?docid8604680088
784253620(part 1 of 7) http//ngm.nationalgeogra
phic.com/features/world/asia/georgia/flores-homini
ds-text http//www.nature.com/nature/focus/flores
/index.html For updated info (2009) http//www.n
ature.com/nature/journal/v459/n7243/full/459041a.h
tml
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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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(No Transcript)
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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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SoSeveral 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
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65
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Fig 34.40
Human Evolution
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H. floresiensis A new species?
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Yes the number of similar individuals, the
dates of existence (90,00018,000 years old),
and the different morphology.
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There is much controversy over H. floresiensis
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There is much controversy over H. floresiensis
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-hu
man.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
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Next What is ecology... Exams returnedF
2/19 Homework 2is due M 2/22