稀树草原是炎热、季节性干旱气候条件下长成的植被类型，其特点是底层连续高大禾草之上有开放的树冠层，即稀疏的乔木。世界最大片的稀树草原见于非洲、南美洲、澳大利亚、印度、缅甸 -泰国地区和马达加斯加。
稀树草原通常经历一个相当漫长的旱季。
Savannas typically experience a rather prolonged dry season.
草场的增加和随之而来的过度放牧导致了稀树草原的扩张。
Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna.
稀树草原的土壤与一些热带雨林的土壤有许多相似的特征，尽管会更极端。
In many characteristics, savanna soils are similar to those of some rain forests, though more extreme.
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