Data on Pattern Within Plant Communities: III. Acacia-Capparis Semi-Desert Scrub in the Sudan

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Abstract
The pattern of shrubs in Acacia-Capparis semi-desert scrub north of Khartoum, Sudan does not show evidence of the regularity commonly postulated. The pattern of seedlings of Acacia ehrenbergiana is more intense than that of larger individuals. The fall in intensity is interpreted as a result of competition between individuals. The patterns of A. ehrenbergiana and Capparis decidua are mainly unrelated. Smaller scales of pattern may result in part 101446-101454 ECOLOGY [Vol. 46] 8206 from grouping round parent plants. Run-off may also be partially responsible for control of distribution, but the observed patterns cannot be explained in terms of these factors alone. It is suggested that variations in soil factors, resulting in variation in soil moisture relations, are important controlling factors.