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- W2000583811 abstract "The peculiarly uneven distribution of rainfall over the continent of Africa has served, to a large extent, to divert attention from temperature as a factor of importance in influencing avifaunal distribution in the Ethiopian Zoogeographical Region.1 Africa, unlike other regions, possesses no well-defined mountain system which might serve to focus attention on the temperature factor. The influence of the higher mountain peaks upon its avifauna is of relatively minor importance, due, no doubt, to the isolation and small extent of these mountains. The broad expanse of plateau-like highlands which extends from Abyssinia south to the Cape, with a branch running westward to Angola, is relatively too low to induce any very striking reaction on the part of the avifauna. Nevertheless, this highland system plays a fundamental part in its effect on bird distribution. The concentration of forests, and richly vegetated lands, in western equatorial Africa, as a result of the generally heavier precipitation there, and the development of the vegetation of the remainder of the continent in a series of concentric semi-circles, or belts, of progressing aridity around this center, has had a remarkable effect on avifaunal distribution. The occurrence within this central area of many genera and species of birds not found elsewhere has led to the differentiation, by zoogeographers (Wallace, '76; Reichenow, 'oi; Chapin, '23), of a West African Subregion distinct from the remainder of the region. The differences between these two subregions can, however, be shown, by analysis of the avifauna, to be due chiefly to the preponderance of forest-inhabiting genera and species in the one, and to an abundance of plains and semi-desert forms in the other. The distinction is, thus, a quantitative, more than a qualitative one. Were the rainfall of Africa more evenly distributed, as in other parts of the world, concentration of the forests into a single central area would not occur, and a primary zoogeographical division into subregions characterized" @default.
- W2000583811 created "2016-06-24" @default.
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- W2000583811 date "1933-07-01" @default.
- W2000583811 modified "2023-09-27" @default.
- W2000583811 title "African Bird Distribution in Relation to Temperature and Rainfall" @default.
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- W2000583811 doi "https://doi.org/10.2307/1932797" @default.
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