03 Human Ecology - the mechanism. Populations evolve, not...

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Human ecology Context and Analysis
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Key concepts Carrying capacity ecosystem habitat genes evolution cultural evolution Horticulture intensive agriculture pastoralism political ecology industrial agriculture culture stability
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Legacy Evolutionary processes: biological, environmental, cultural
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Archaeological and DNA evidence strongly support African Genesis of modern humans 200,000-140,000 years ago modern humans migrated out of Africa onto Eurasian continent replacing other human species in these regions. Humans reached North and South American continents around 20,000* years ago.
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Archaeological evidence Camps Biological DNA, mtDNA skeletal remains skeletal morpholog artifacts tools agricultural adaptation
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mtDNA Mitochondrial DNA is the primary genetic evidence. Plentiful in cells; fewer genes; known rate of mutation; is not affected by sexual reproduction; passed intact mother to daughter.
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Darwinian evolution by natural Selection Natural selection is the process, genetics is
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Unformatted text preview: the mechanism. Populations evolve, not individuals Selection is neither random nor purposeful: what is good for the organism today may not be so in a different context or environment. Evolutionary process Can be slow or quick Operates only with existing genes Most mutations are fatal Adaptation means best able to reproduce within specific constraints--usually through accommodation to niche environments. Darwin, Wallace, Mendel Darwin Wallace Mendel Best human adaptation Culture A key characteristic is group behavior Humans interact with environment trough technology. Technology is a special form of material culture. Agriculture is a technology that alters nature Human Ecology/Culture Ecology Recognizing the role humans play in shaping their environments and the feedback from nature that impacts human development physically and/or culturally...
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This note was uploaded on 09/08/2010 for the course ANTH 143 at San Jose State University .

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03 Human Ecology - the mechanism. Populations evolve, not...

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