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Development and Stability of Grass/Woody Mosaics in a Subtropical Savanna Parkland, Texas, U. S. A.

Steve Archer
Journal of Biogeography
Vol. 17, No. 4/5, Savanna Ecology and Management: Australian Perspectives and Intercontinental Comparisons (Jul. - Sep., 1990), pp. 453-462
Published by: Wiley
DOI: 10.2307/2845377
Stable URL: http://www.jstor.org/stable/2845377
Page Count: 10
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Development and Stability of Grass/Woody Mosaics in a Subtropical Savanna Parkland, Texas, U. S. A.
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Abstract

The potential natural vegetation of southern Texas and northern Mexico has been classified by plant geographers as savanna. However, many of the present landscapes in this subtropical region are dominated by thorn woodlands. Evidence for replacement of grasslands and savannas by woodlands is based largely on historical accounts, many of which are conflicting. This paper reviews and integrates a series of recent studies addressing the following questions: (1) Have woodlands replaced grasslands or savannas? (2) If there was a physiognomic conversion (a) what successional processes were involved; (b) what time scale would have been required; and (c) what were the causes?

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