A Statistical Test of the Accuracy and Consistency of Ordinations

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Abstract
A nonparametric statistical test of the performance of ordinations is adapted and extended from the work of Feigin and Cohen (1978). Two measures of ordination performance are accuracy (the tendency of ordination results to mirror correctly the true community structure) and consistency (the ability of the ordination to produce concordant results). Statistical estimates of accuracy and consistency are given and tests are developed for choosing among ordination techniques.