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HOW DO UNDERSTORY PLANTS COME BACK AFTER FIRE?

HOW DO UNDERSTORY PLANTS COME BACK AFTER FIRE?. BURIED TREASURES: Perennials. Underground buds or growing points Dormant before fire Meristem tissues (i.e. stem cells) Insulated from the heat of fire Released from dormancy by the death of the buds on the aerial portions of the plant.

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HOW DO UNDERSTORY PLANTS COME BACK AFTER FIRE?

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  1. HOW DO UNDERSTORY PLANTS COME BACK AFTER FIRE?

  2. BURIED TREASURES:Perennials • Underground buds or growing points • Dormant before fire • Meristem tissues (i.e. stem cells) • Insulated from the heat of fire • Released from dormancy by the death of the buds on the aerial portions of the plant

  3. DEPENDS ON WHERE THEY’RE GROWING HOW DOES FIRE AFFECT UNDERGROUND PLANT STRUCTURES?

  4. Litter & Duff Mineral soil FOREST FLOOR LAYERS

  5. UNDERGROUNDSTRUCTURES THAT SUPPORT DORMANT BUDS • Root collar • Root crown • Rhizome • Caudex • Bulb • Corm

  6. Litter & Duff Mineral soil ROOT COLLAR

  7. Litter & Duff Mineral soil ROOT CROWN

  8. Litter & Duff Mineral soil RHIZOME

  9. Litter & Duff Mineral soil CAUDEX

  10. CAUDEX

  11. Litter & Duff Mineral soil BULB/CORM

  12. CORM BULB

  13. Root collar Root crown Rhizome Caudex Bulb/ Corm

  14. Litter & Duff Mineral soil Another treasure: BURIED SEED

  15. BURIED TREASURES: Seeds • Insulated from the heat of the fire • Remain in the soil for decades • Are still able to germinate and grow

  16. Buried Treasures • Fire adaptation of understory plants—if top-killed can still be alive below ground • Underground buds • insulated from the heat of a fire • dormant • Located on underground structures that are species specific • Sprouting ability variable • depends upon bud location—litter/duff vs. mineral soil • depends on duration of fire and duff consumption

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