Some of the best-developed and most extensive vegetation communities on the continent are found in the Windmill Islands region of East Antarctica (Lewis Smith, 1988), with distribution of vegetation strongly influenced by microclimatic conditions, particularly water availability. Relatively small variations in water availability over small areas (e.g. <1 ha) can result in a change in community composition from moss- to lichen-dominated (Selkirk andSeppelt, 1987; Lewis Smith, 1990; Wasley et al., 2006a,b, 2012).
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