Lecture 13 Ag continued

Lecture 13 Ag continued - Monday, October 12 To Do List...

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Monday, October 12 To Do List Please turn in Article Write-Up 2 Selection effects on domesticates Advantages/Disadvantages of Agriculture Types of Agricultural Subsistence
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Selection Effects On Domesticates Intentional or unintentional process of promoting certain traits and the suppression of others – For increased yield – Against self-defense – For uniformity • Biological characteristics • Environmental requirements
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How do archaeologists identify domesticates? Marshelder Sunflower Squash Eastern Agricultural Complex Changes in DNA Changes in Morphology Plants: Seed size Seed coat thickness Animals: Frame/size of legs Teeth Markings on bones indicating Traction, harnessing
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Long-Term Dynamics of Agriculture • Competition between cultivation and foraging • Differential population growth of farmers and foragers • Landscape changes of agriculture influences foraging • Positive feed back of agricultural system
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Spread of domesticates Population growth Environmental change Adaptation of pests Increased yields Increased Carrying Capacity Monocrop fields Reduced genetic variability Decreased dietary diversity Increased dependence on domesticates investments in domesticates Reduced environmental tolerances Increased susceptibility to pests Crop failures Decreased Carrying Capacity Population Exceeds Carrying Capacity Long-Term Dynamics Starvation or emigration Other foods less available
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This note was uploaded on 10/22/2010 for the course ASB 326 taught by Professor Falconer during the Fall '08 term at ASU.

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Lecture 13 Ag continued - Monday, October 12 To Do List...

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