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Unformatted text preview: West to East,
more melanics as you go
east Ocean has huge inﬂuence on the
temperature of terrestrial systems. As you
move away from the water, temperature gets
colder. • 2004: Temperature
gradient erased, cline in
melanics eliminated • C02 Warming
• Warming eliminates temperature
• Change in temperature eliminates
fitness advantage of melanics
• Change in fitness of genotypes
evolution in response to climate
warming Species mostly affected by such changes are
those of short generation time (e.g., insects). Figures modified from Brakefield and de Jong (2011), Heredity 107: 574 578 11 4/3/2013 Summary
• Global climate change is having significant
effects on organisms
– Range limits
– Evolution • The data supporting anthropogenic climate
change is overwhelming, as are the data on
biological responses How hard can you push a support system?
Ethical concerns with regards to "pushing" the earth's natural system.
Recall antagonistic pleiotropy from Rowe's lectures:
-natural selection favors alleles with short term gains, even if there are long term
resulting in bodies that are programmed to senesce and die How do we change our social structures and manage senescence?
Natural selection is blind; has no mechanism to take future costs into account
but the human imagination can in principle consider future consequences. 12...
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This document was uploaded on 01/27/2014.
- Winter '14
- Annotated Lecture S