[Home]History of Africa/Ecology

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Revision 3 . . (edit) September 10, 2001 3:05 am by Anders Torlind
Revision 2 . . September 9, 2001 8:06 pm by Pinkunicorn [Added lots of links. This text is still a museum piece.]
Revision 1 . . September 9, 2001 3:01 pm by (logged).99.203.xxx [Initial text from 1911 encyclopedia -- please update as needed]
  

Difference (from prior major revision) (minor diff, author diff)

Changed: 1,83c1,19
Flora.-- The vegetation of Africa follows very closely
the distribution of heat and moisture. The northern and
southern temperate zones have a flora distinct from that
of the continent generally, which is tropical. In the
countries bordering the Mediterranean are groves of oranges
and olive trees, evergreen oaks, cork trees and pines,
intermixed with cypresses, myrtles, arbutus and fragrant
tree-heaths.

South of the Atlas range the conditions
alter. The zones of minimum rainfall have a very scanty
flora, consisting of plants adapted to resist the great
dryness. Characteristic of the Sahara is the date-palm,
which flourishes where other vegetation can scarcely maintain
existence, while in the semidesert regions the acacia (whence
is obtained gum-arabic) is abundant.

The more humid regions
have a richer vegetation --dense forest where the rainfall
is greatest and variations of temperature least, conditions
found chiefly on the tropical coasts, and in the west African
equatorial basin with its extension towards the upper Nile;
and savanna interspersed with trees on the greater part of the
plateaus, passing as the desert regions are approached into a
scrub vegetation consisting of thorny acacias, etc. Forests also
occur on the humid slopes of mountain ranges up to a certain
elevation. In the coast regions the typical tree is the
mangrove, which flourishes wherever the soil is of a swamp
character.

The dense forests of West Africa contain, in
addition to a great variety of dicotyledonous trees, two
palm?s, the Elaeis guincensis (oil-palm) and Raphia
vinifera (bamboo-palm), not found, generally speaking, in
the savanna regions. The bombax or silk-cotton tree attains
gigantic proportions in the forests, which are the home of
the india rubber-producing plants and of many valuable kinds
of timber trees, such as odum (Chlorophora excelsa),
ebony?, mahogany? (Khaya senegalensis), African teak? or
oak? (Oldfieldia africana) and camwood (Baphia nitida.)
The climbing plants in the tropical forests are exceedingly
luxuriant and the undergrowth or "bush" is extremely
dense.

In the savannas the most characteristic trees are
the monkey bread tree or baobab (Adanisonia digitata), doom
palm (Hyphaene) and euphorbias. The coffee plant grows
wild in such widely separated places as Liberia and southern
Abyssinia. The higher mountains have a special flora
showing close agreement over wide intervals of space, as
well as affinities with the mountain flora of the eastern
Mediterranean, the Himalayas and Indo-China.

In the swamp regions of north-east Africa the papyrus and
associated plants, including the soft-wooded ambach, flourish
in immense quantities---and little else is found in the way of
vegetation. South Africa is largely destitute of forest
save in the lower valleys and coast regions. Tropical flora
disappears, and in the semi-desert plains the fleshy, leafless,
contorted species of kapsias, mesembryanthemums, aloes and
other succulent plants make their appearance. There are, too,
valuable timber trees, such as the yellow pine (Podocarpus
elongatus), stinkwood (Ocotea), sneezewood or Cape ebony
(Pteroxylon utile) and ironwood. Extensive miniature woods
of heaths are found in almost endless variety and covered
throughout the greater part of the year with innumerable
blossoms in which red is very prevalent. Of the grasses of
Africa alfa is very abundant in the plateaus of the Atlas range.

Fauna.--The fauna again shows the effect of the characteristics
of the vegetation. The open savannas are the home of large
ungulates, especially antelope?s, the giraffe (peculiar to
Africa), zebra, buffalo, wild ass and four species of
rhinoceros?; and of carnivores, such as the lion?, leopard?,
hyena, etc. The okapi (a genus restricted to Africa) is
found only in the dense forests of the Congo basin. Bears
are confined to the Atlas region, wolves and foxes to North
Africa. The elephant (though its range has become restricted
through the attacks of hunters) is found both in the savannas
and forest regions, the latter being otherwise poor in large
game, though the special habitat of the chimpanzee? and gorilla.
Baboon?s and mandrill?s, with few exceptions, are peculiar to
Africa. The single-humped camel--as a domestic animal--is
Flora

The vegetation of Africa follows very closely the distribution of heat and moisture. The northern and southern temperate zones have a flora distinct from that of the continent generally, which is tropical. In the countries bordering the Mediterranean are groves of oranges and olive trees, evergreen oaks?, cork? trees and pines?,
intermixed with cypresses?, myrtles?, arbutus? and fragrant tree-heaths?.

South of the Atlas range the conditions alter. The zones of minimum rainfall have a very scanty flora, consisting of plants adapted to resist the great dryness. Characteristic of the Sahara is the [date palm]?, which flourishes where other vegetation can scarcely maintain existence, while in the semidesert regions the acacia (whence is obtained gum-arabic) is abundant.

The more humid regions have a richer vegetation -- dense forest where the rainfall is greatest and variations of temperature least, conditions found chiefly on the tropical coasts, and in the west African equatorial basin with its extension towards the upper Nile; and savanna interspersed with trees on the greater part of the plateaus, passing as the desert regions are approached into a scrub vegetation consisting of thorny acacias, etc. Forests also occur on the humid slopes of mountain ranges up to a certain elevation. In the coast regions the typical tree is the mangrove?, which flourishes wherever the soil is of a swamp? character.

The dense forests of West Africa contain, in addition to a great variety of [dicotyledonous trees]?, two palms?, the Elaeis guincensis ([oil palm]?) and Raphia vinifera ([bamboo palm]?), not found, generally speaking, in the savanna regions. The bombax? or silk-cotton tree attains gigantic proportions in the forests, which are the home of the india rubber-producing plants and of many valuable kinds of timber trees, such as odum? (Chlorophora excelsa), ebony?, mahogany? (Khaya senegalensis), African teak? or oak? (Oldfieldia africana) and camwood? (Baphia nitida.) The climbing plants in the tropical forests are exceedingly luxuriant and the undergrowth or "bush" is extremely dense.

In the savannas the most characteristic trees are the monkey bread tree or baobab? (Adanisonia digitata), [doom palm]? (Hyphaene) and euphorbias?. The coffee plant grows wild in such widely separated places as Liberia and southern Abyssinia. The higher mountains have a special flora showing close agreement over wide intervals of space, as well as affinities with the mountain flora of the eastern Mediterranean, the Himalayas? and Indo-China?.

In the swamp regions of north-east Africa the papyrus and associated plants, including the soft-wooded ambach?, flourish
in immense quantities---and little else is found in the way of vegetation. South Africa is largely destitute of forest save in the lower valleys and coast regions. Tropical flora disappears, and in the semi-desert plains the fleshy, leafless, contorted species of kapsias?, mesembryanthemums?, aloes and other succulent plants make their appearance. There are, too, valuable timber trees, such as the [yellow pine]? (Podocarpus elongatus), stinkwood? (Ocotea), sneezewood? or [Cape ebony]? (Pteroxylon utile) and ironwood. Extensive miniature woods of heaths are found in almost endless variety and covered throughout the greater part of the year with innumerable blossoms in which red is very prevalent. Of the grasses of Africa alfa is very abundant in the plateaus of the Atlas range.

Fauna

The fauna again shows the effect of the characteristics of the vegetation. The open savannas are the home of large ungulates, especially antelopes?, the giraffe (peculiar to Africa), zebra, buffalo, wild ass? and four species of rhinoceros?; and of carnivores, such as the lion?, leopard?, hyena, etc. The okapi (a genus restricted to Africa) is found only in the dense forests of the Congo basin. Bears are confined to the Atlas region, wolves and foxes to North Africa. The elephant (though its range has become restricted through the attacks of hunters) is found both in the savannas and forest regions, the latter being otherwise poor in large game, though the special habitat of the chimpanzee? and gorilla. Baboon?s and mandrill?s, with few exceptions, are peculiar to Africa. The single-humped camel--as a domestic animal--is

Changed: 86,122c22,28
The rivers in the tropical zone abound with
hippopotami? and
crocodile?s, the former entirely confined to Africa. The vast
herds of game, formerly so characteristic of many parts of Africa,
have much diminished with the increase of intercourse with the
interior. Game reserves have, however, been established in South
Africa, British Central Africa, British East Africa, Somahland,
etc., while measures for the protection of wild animals were
laid down in an international convention signed in May 1900.

The ornithology of northern Affica presents a close resemblance
to that of southern Europe, scarcely a species being found
which does not also occur in the other countries bordering the
Mediterranean. Among the birds most characteristic of Africa
are the ostrich and the secretary-bird. The ostrich is widely
dispersed, but is found chiefly in the desert and steppe
regions. The secretary-bird is common in the south. The weaver
birds and their allies, including the long-tailed whydahs,
are abundant, as are, among game-birds, the francolin and
guinea-fowl. Nany of the smaller birds, such as the sun-birds,
bee-eaters, the parrot?s and halcyons, as well as the larger
plantain-eaters, are noted for the brilliance of their
plumage.

Of reptiles the lizard and chameleon? are common, and
there are a number of venomous snake?s, though these are not
so numerous as in other tropical countries.

The scorpion is
abundant. Of insects Africa has many thousand different
kinds; of these the locust? is the proverbial scourge of the
continent, and the ravages of the termite?s or white ants
are almost incredible. The spread of malaria by means of
mosquito?es is common. The [tsetse fly]?,
whose bite is fatal to all domestic animals, is common
in many districts of South and East Africa. Fortunately
it is found nowhere outside Africa.
The rivers in the tropical zone abound with hippopotami? and crocodiles?, the former entirely confined to Africa. The vast herds of game, formerly so characteristic of many parts of Africa, have much diminished with the increase of intercourse with the interior. Game reserves have, however, been established in [[South
Africa]], [British Central Africa]?, [British East Africa]?, Somahland?, etc., while measures for the protection of wild animals were laid down in an international convention signed in May 1900.

The ornithology? of northern Africa presents a close resemblance to that of southern Europe, scarcely a species being found which does not also occur in the other countries bordering the Mediterranean. Among the birds most characteristic of Africa
are the ostrich and the secretary-bird?. The ostrich is widely dispersed, but is found chiefly in the desert and steppe? regions. The secretary-bird is common in the south. The [weaver birds]? and their allies, including the [long-tailed whydahs]?, are abundant, as are, among game-birds, the francolin? and guinea-fowl?. Many of the smaller birds, such as the sun-birds?, bee-eaters?, the parrots? and halcyons?, as well as the larger plantain-eaters?, are noted for the brilliance of their plumage.

Of reptiles? the lizard and chameleon? are common, and there are a number of venomous snakes?, though these are not so numerous as in other tropical countries.

Added: 123a30,31
The scorpion is abundant. Of insects Africa has many thousand different kinds; of these the locust? is the proverbial scourge of the continent, and the ravages of the termites? or white ants are almost incredible. The spread of malaria by means of
mosquitoes? is common. The [tsetse fly]?, whose bite is fatal to all domestic animals, is common in many districts of South and East Africa. Fortunately it is found nowhere outside Africa.

Changed: 127c35
Initial text from 1911 encyclopedia -- Please update as needed
Initial text from 1911 encyclopedia -- Please update as needed

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