Figure 4: Principal Component Analysis (PCA) of allele frequency covariance in Porites astreoides populations.
From: Long distance dispersal and vertical gene flow in the Caribbean brooding coral Porites astreoides
14 of 79 axes were retained, explaining 100% of the cumulative variance. Plotted are the first and second axes explaining 38.59% (P < 0.01) and 21.28% (P < 0.05) of the variance, respectively. Axes cross at 0. The different shapes denote each of the 3 geographic locations sampled in this study (Florida, Bermuda and U.S. Virgin Islands), whereas different colors denote each of the 3 depths under comparison [shallow (≤10 m), mid (15–20 m) and deep (≥25 m)]. UK = Upper Keys, LK = Lower Keys, DT = Dry Tortugas, Bermuda = Bermuda and USVI = U.S. Virgin Islands.
