african vegetation patterns. vegetation zones –the majority of africa lies within the tropics...
TRANSCRIPT
![Page 1: African Vegetation Patterns. Vegetation Zones –The majority of Africa lies within the tropics –Wet near the equator –Drier moving north and south](https://reader036.vdocument.in/reader036/viewer/2022072006/56649d085503460f949d9adb/html5/thumbnails/1.jpg)
African Vegetation Patterns
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Vegetation Zones
– The majority of Africa lies within the tropics
– Wet near the equator
– Drier moving north and south
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Tropical Rain Forest
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Tropical Rain Forest
Near the equator; 200+ inches of rain annually3000+ species per square mile (mostly in canopy).Soil problems (leaching) because of abundant
rainfall.Warm & wet climate = good for diseases.No dry season = grains can’t be grown.
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Savanna
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Savanna
Tropical grasslands; identified by type of grass (tall or short).
Seasonal rainfall (long & short rains).Widespread practice of burning; only fire resistant
trees survive (baobab, acacia etc.).Sustains most of Africa’s agriculture.Serengeti Plain with large mammals.
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Sahel
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Sahel
Sahel = shore (Arabic).Grass is no longer sod; bunch grasses.Unpredictable rainfall can lead to drought & famine.Erosion & desertification caused by:
– Overgrazing, stripping trees for firewood, & clearing too much land for farming.
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Deserts
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Deserts
Arid & semi-arid. Sahara = sea of sand (Arabic). Namib = place of nothingness
(Nama). Kalahari = the great thirst
(Tswana). Daily temperatures vary
greatly; 120ºF during the day, 50ºF at night.
Deserts are spreading faster due to human activities.
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Biomass
The weight of living matter per unit of land.– Africa has the
densest biomass in the world.
– Very productive plants leads to large herbivores which leads to large carnivores.