Speciation Stories for Field Botany, PBIO 109 Larkspurs (Guerrant) dramatic differences; simple...
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Transcript of Speciation Stories for Field Botany, PBIO 109 Larkspurs (Guerrant) dramatic differences; simple...
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Speciation Stories for Field Botany, PBIO 109
Larkspurs (Guerrant) dramatic differences; simple genetic changesColumbines (Koontz) direction and rate of change with selectionLeavenworthia (Rollins) ecological isolation and differential selectionSky Pilots (Galen) ecological isolation and differential selectionBeachpeas (Schmitz) geographic isolation and ice-age refugia
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Delphinium decorum
Delphinium nudicaule
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D. cardinalealso from western North America
Only remotely related - see Koontz et al. 2004
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frmo Koontz, 2004
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Distribution of Delphinium decorum, D. nudicaule, and their hybrid D. luteum.
from Koontz et al., 2001
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Columbine pollinator changes
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Pollinator shifts drive increasingly long nectar spurs in columbine flowers. Whittall and Hodges, 2007 ---- Nature 447: 706-710.
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Leavenworthia
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Leavenworthia crassa
Leavenworthia exigua
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Polemonium viscosum - the sky pilot
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Odor Corolla Flair
narrow wide
skunky COMMON RARE (sepals) UP HIGH
Odor
sweet RARE COMMON (petals) DOWN LOW
SKY PILOT VARIANTSAnd ELEVATION
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Lathyrus japonicus
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References
Galen et al. 1987. Pollination in floral scent morphs of Polemonium viscosum. Evolution.Guerrant, 1982. Neotrenic evolution in larkspurs. Evolution.Schmitz, 2002. The evolutionary and biogeographic history of Lathyrus japonicus (beach pea) in North America, PhD thesis UVM.Solbrig and Rollins. 1977. The evolution of autogamy in species of Leavenworthia. Evolution.Whittall and Hodges . 2007. Pollinator shifts drive increasingly longer spurs in columbines. Nature.