Speciation Post Winter 2009

Speciation Post Winter 2009 - ! Behavioral Isolation /...

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Speciation x Species : Word Literally Means “Kind” ! x Species : x Difficult to Define / Evolution, Genetics x Most Accepted = Inter-breeding Populations That Are Reproductively Isolated. New Species = Variants / populations Become Isolated. Geographical Isolation x Geographical Isolation : Populations Become Separated Geographically and Diverge ! x Natural Geologic Causes : x Competition Between Populations : Geographical Isolation 1 2 6 7 1 2 6 7 3 4 5 Mechanical Isolation x Mechanical Isolation : Reproductive Structures Become Incompatible Between Populations ! x Plants : Pollination ! x Insects : Damselflies ! Behavioral Isolation x Behavioral Isolation : Behavior That Prohibits Breeding Between Individuals ! x Birds : Males Must Display / Sing Properly
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Unformatted text preview: ! Behavioral Isolation / Insects x Insects : x ( Crickets ) ! x Light / display ( Fireflys / lightning Bugs ) ! Bird Song Example ! Temporal Isolation x Temporal Isolation : Reproduction at Different Times of The Year, OR Even During Different Years ! Temporal Isolation Continued x Cicadas ( What Many Call “Locust” ) : But they’re Not ! Reproduction : Ecological Isolation x Ecological Isolation : Species Living in Different Micro-Habitats of The Same Area / Habitat ! Tree Dwellers ! Cliff Face Dwellers ! New Species in a Single Generation ?? x Polyploidy : = New Species ! Included as part of your reading assignment ! OK - so . .. 3 Subjects ?? T I M E...
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This note was uploaded on 11/28/2010 for the course BIOLOGY 100 taught by Professor Chordas during the Spring '09 term at Ohio State.

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Speciation Post Winter 2009 - ! Behavioral Isolation /...

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