Tropical Savanna By: Kristin Maushart & Holly Reynolds.

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Presentation transcript:

Tropical Savanna By: Kristin Maushart & Holly Reynolds

Geography

What factors determine the development of savanna vegetation?  Climate--including seasonality (if exists)  Soils— nutrient-poor, but either well or poorly drained  Fire— natural or (more commonly) human-induced  Human influences-- cutting, agriculture

Victoria Plains, Australia Trans Fly, Indonesia Kimberly, West Australia East African Savannas Climates

Wildlife  Herbivorous  Herd Animals

Wildlife ~Carnivorous ~Herds/Solitary

Plant Life  Cold temperate steppe: growing season.  Cold temperate steppe: dormant season.

Plant Life  High rainfall tropical savanna: growing season.  High rainfall tropical savanna: dormant season.

Fire  Most types show evidence of frequent fire  Morphological “adaptations” to withstand it

Human Influences  Conversion of savanna/forest to agriculture, grazing land; charcoal extraction  Higher ground-level temperatures (“albedo”) by loss of vegetation cover  Increased erosion, soil compaction  Reduced soil nutrients