Biogeog lecture 4 Flashcards
What are the climatic zones of Africa?
Arid, tropic and temperate
What are the major vegetation in West Africa ?
Sahel, Sudan, Sahara and Guinea Savanna and rainforest
Boundaries of bands of major vegetation run approximately parallel with the
equator
Coastal vegetation is found….
along the coast
Strand vegetation is found
at the sea shore
Mangrove verge is found along
lagoons
Algae vegetation is found
between tide marks
Montane vegetation is found
in higher mountains
Savanna is subdivided into three namely …
Sahel, Sudan and Guinea
A region of formerly high forest but which the original tall trees have now been destroyed and replaced by the invasion of Guinea Savanna is called
Derived Savanna
The relatively more moist savanna with a considerable cover of broad-leaved trees is
Guinea Savanna
Fire is an important ecological factor in the
Guinea Savanna
Afzelia africana is
African Mahogany
Vitellaria Paradoxa is
Shea butter tree
Parkia Clappertoniana is
Dawadawa tree
Adansonia Digitata is
Baobab tree
Mention 4 fire resistant trees with thick barks.
Shea butter tree
African Mahogany
Baobab tree 🌲
Dawadawa tree
Grasses in Guinea Savanna are relatively taller/ shorter?
taller about 1.5 to 3m high
Are grasses in the Guinea Savanna fire resistant?
yes
Grasses in the Guinea Savanna include
Andropogen and Pennisetum
Pennisetum grass is also known as
elephant grass
Sudan Savanna has a
reduced tree cover and fewer broad-leaved trees.
Which type of Savanna covers a greater part of countries such as Burkina Faso and Mali?
Sudan Savanna
Sudan Savanna has an approximate annual rainfall of ….
600 - 900mm
Which type of Savanna endures a more severe and prolonged dry season of 7 months from October to April?
Sudan Savanna
Between Sudan and Guinea Savanna, which is much more heavily populated?
Sudan Savanna
What are some major crops in the Sudan Savanna zone?
Millet, Guinea Corn and Yams 🍠
Is fire an important factor in the Sudan Savanna?
no
Which savanna type supports large numbers of cattle 🐄 and other domestic animals?
Sudan Savanna
Which savanna type has an annual rainfall of roughly 250 to 600mm?
Sahel Savanna
Amongst the three types of Savanna, which has its dry season being the most intense?
Sahel Savanna
Broad leaved trees are more or less absent in the
Sahel Savanna zone
Grasses found in …….. savanna are sparse and less than 1m tall.
Sahel Savanna
Kaduna in the savanna belt of The Nigeria has a higher/lower rainfall than Ibadan in the forest.
higher
