Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
occurrence
|
southern hemisphere
|
|
fire adaptations
|
-some species only release seeds after heat of a fire opens their fruits
-some seeds germinate only after the seed coat has been cracked by heat from a fire -the smooth, light bark of some eucalyptus species reflects the heat of a fire, protecting the tree from understory burns -many fire-dominated eucalpyts have epicormic buds |
|
epicormic buds
|
-a cluster of vegetative buds under the bark which can sprout very quickly after a fire
|
|
aboriginal fire-use
|
-fire was used by aborigines to draw game--new, young growth attracts herbivores because of its high nutrient content and low ration of lignins and other structural materials
|
|
fire intensity
|
-intensity of a fire is integral in shaping the post-fire community (quick brush fire will leave much unburned, while canopy fire will take out whole forest)
-intensity is largely a function of the time since the last fire--if there is lots of accumulation of biomass, canopy burn is more likely. -severe burns lead to recolonization of even-aged stands |