Coral Skeletons Provide Historical Evidence of Phosphorus Runoff on the Great Barrier Reef
Figure 5
Scatter plots detailing mean P/Ca (mol mol-1) from Porites cores from Dunk Island and (a) fertiliser-phosphorus (tonnes), 1950-2005, open circles represent annual means from one long core 1950-1978 and filled circles represent annual means from all three cores from 1979-2005.
Correlation detailed for the three core dataset time period (cores 1-3, 1979-2005) and separately for the longer time-frame (core 3, 1950-1978); (b) Tully River particulate phosphorus loads (tonnes) over 13 years, 1988-2000; and (c) Ba/Ca (mol mol-1) from 1979-2008. All data points represent annual means. Note all 3 graphs show highly significant correlations (p<0.01).