Seed Dispersal • Seed Pool • Consequences of seed...
Transcript of Seed Dispersal • Seed Pool • Consequences of seed...
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Seed & Fruit Ecology II
• Seed Dispersal• Seed Pool• Consequences of seed pool
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Seed Dispersal
• Leptokurtic curve with low mean and long tail
• dense stand • edge of forest • wind factors • Seasonal release of seeds
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Dispersal Curves
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Dispersal
edge of forest
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Dense Stands
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Seasonal release of seeds
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Dispersal of Fruit: Experimental
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Seed Pool• Buffering populations
from environmental variation
• Seed dormancy would be opposed if there was no environmental variation
• Selection for immediate germination
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Seed pools
•Effect of community composition
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Characteristics of seed pool
• Seed germination • Seed dormancy types • born dormant • enforced by
season/switched on • breaking dormancy • Seed longevity in pool • Seed senescence in
pool
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Seed germination
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Seed germination
• requirements • dessication• cold • scarification of seed
coat • light
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Consequences of seed pool
• fate of seeds • delay germination • genetic input of good
years versus bad years