Figure 3: Scatterplots Showing Original Percent Cover Values Obtained Using the Chain Point-Intercept (CPI) Method vs. The Photoquadrat (PQ) Method for Each Benthic Component on the Three Reef Types.

doi 10.7717/peerj.8167/fig-3

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Supplemental Information 1: Scatterplots of Original Percent Cover Obtained Using the Photoquadrat (PQ) Method vs. Values After Converting to Chain Point-Intercept (CPI) Ones for Each Benthic Component on Three Reef Types.

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Table 2: Summary of Conclusions From the Comparisons of Percent Cover Estimates Between Chain Point-Intercept (CPI) and Photoquadrat (PQ) Methods for Six Benthic Components on the Three Reef Types in Barbados.

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Supplemental Information 4: Comparison of This Study’s Photoquadrat (PQ) Method, the GCRMN-Caribbean Level-3 PQ Method, and the Chain Point-Intercept (CPI) Method Used by the Barbados Reef Monitoring Programme (BRMP).

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Supplemental Information 2: Differences in % Cover Between Methods Plotted Against the Mean Estimate From Both Methods Across the Three Reef Types After Converting Photoquadrat (PQ) Estimates to Chain Point-Intercept (CPI) Ones.

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Figure 4: Differences in Percent Cover Estimates Between Methods Against the Average Percent Cover Estimated by Both Methods for Each Benthic Component Across the Three Reef Types in Barbados.

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Figure 5: Changes in Absolute Hard Coral Percent Cover Between 2012 and 2017 Estimated by Comparing Data From 2012 Obtained Using the Chain Point-Intercept (CPI) Method With Method-Specific Data Sets From 2017.

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Supplemental Information 6: PQ and CPI Estimates of % Cover for Six Benthic Reef Categories.

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Supplemental Information 5: Comparison of Observed and Converted Photoquadrat (PQ) % Cover Estimates at Each Reef Type for the Four Benthic Components for Which Differences Between Methods in % Cover Scaled With Average % Cover.

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Table 1: Summary of the ANCOVA Full Model Results for Each Benthic Component, Comparing Difference in Percent Cover as a Function of Reef Type and Average Percent Cover.

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