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Table 4 Summary of correlations among metals, organic matter, and covers of live and dead corals in all reef sites

From: Heavy metals distribution in the coral reef ecosystems of the Northern Red Sea

Metal Sample Live coral cover Dead coral cover Total organic matter
r r 2 P r r 2 P r r 2 P
Cu W −0.82 0.67 0.025 0.82 0.67 0.025 0.90 0.82 0.005
S −0.72 0.52 0.067 0.82 0.68 0.023 0.81 0.66 0.026
Zn W −0.67 0.44 0.103 0.76 0.57 0.049 0.85 0.72 0.015
S −0.83 0.69 0.021 0.80 0.64 0.031 0.65 0.43 0.116
Pb W −0.81 0.65 0.028 0.81 0.66 0.026 0.89 0.79 0.008
S −0.92 0.85 0.003 0.89 0.80 0.007 0.81 0.65 0.029
Cd W −0.52 0.27 0.236 0.48 0.23 0.278 0.96 0.92 0.001
S −0.94 0.89 0.001 0.95 0.91 0.001 0.78 0.61 0.038
Ni W −0.76 0.58 0.046 0.78 0.61 0.039 0.78 0.61 0.038
S −0.87 0.77 0.010 0.82 0.67 0.025 0.72 0.51 0.071
Co W −0.79 0.61 0.038 0.80 0.64 0.031 0.96 0.92 0.001
S −0.97 0.93 0.000 0.95 0.90 0.001 0.77 0.60 0.041
Fe W −0.81 0.66 0.027 0.85 0.73 0.014 0.78 0.61 0.039
S −0.36 0.13 0.429 0.28 0.08 0.547 0.22 0.05 0.635
  1. Correlations are significant at P < 0.05
  2. r: correlation coefficient, r2: coefficient of determination, P: statistical significance
  3. W: seawater, S: reef sediment