Figure 13: Mantel test results showing the change in correlation (delta-r) for various transformations of depth for the three biological data sets and at two scales (for the fish and chlorophyll data)
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Note: For the first four datasets, whiskers show the standard deviation of delta-r values for the geographic sub samples. For the shelf data, whiskers show the 5% and 95% confidence bounds. Note that variability is higher for the sub-EEZ scale results indicating that there are large geographical differences in the effect of the transformations.
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A bar graph shows the effect on delta-r of four transformations of depth: square root, cube root, fourth root and log10. Six data sets are compared: the full EEZ fish set, the sub EEZ fish set, the Full EEZ chlorophyll set, the sub EEZ chlorophyll set, the shelf set and the average of the five previous sets.
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