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Figure 3.12 Dendrogram of oak woodland communities in the southwestern United States. Communities were defined with minimum-variance clustering (Ward 1963) of 374 plots, using basal area of woody plant taxa as a measure of abundance. Arabic numerals label dichotomies, underlined arabic numerals are numbers of plots, and roman numerals indicate communities. Groups represented by only one plot were regarded as outliers and are therefore not shown. Communities are described in Table 3.2. Reproduced with permission from Mehlert and McPherson (1996).

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