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FIGURE 2 <br />Shrubs as a Percentage of Cover <br />4 --------------------------------------•-----------------------•-----•-----•-•----------------•------------•---------------- <br />3 ----•---------•-•---------•-----------------------------------•-••---------....----------------•-----------••-------------- <br />1 ------------------------ ---------------•---------------------------------------------------------------------------•--- <br />1988 1990 1992 <br />1989 1991 1993 <br />