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Tropical Savanna By: Kristin Maushart & Holly Reynolds
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Geography
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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
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Victoria Plains, Australia Trans Fly, Indonesia Kimberly, West Australia East African Savannas Climates www.runet.edu
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Wildlife Herbivorous Herd Animals www.elephant-pictures.net www.gallery.search.yahoo.com
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Wildlife ~Carnivorous ~Herds/Solitary http://www.bengaltigers.com/bigcats/lions.htm
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Plant Life Cold temperate steppe: growing season. Cold temperate steppe: dormant season. www.managingwholes.com
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Plant Life High rainfall tropical savanna: growing season. High rainfall tropical savanna: dormant season. www.managingwholes.com
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Fire Most types show evidence of frequent fire Morphological “adaptations” to withstand it
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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
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