. Bulletins of American paleontology. Stable Isotopic Variation: Swart et al. 27 U to Llgnumvttae Bay t*2=00i 'i. • • •. A« •. • Manatee Bay '^2=0 18 6 0 0) Text-figure 12.—Relationships between 5"C and S'^O in the coral skeletons from Lignumvitae Basin and from Manatee Bay. Note that in the Lignumvitae data there is no correlation between the two isotopes (R' = )as predicted from an absence of a correlation in the two isotopes in the water at that site. In Manatee Bay however there is a correlation between the two isotopes which is statistically significant at the 99% level (R- =
. Bulletins of American paleontology. Stable Isotopic Variation: Swart et al. 27 U to Llgnumvttae Bay t*2=00i 'i. • • •. A« •. • Manatee Bay '^2=0 18 6 0 0) Text-figure 12.—Relationships between 5"C and S'^O in the coral skeletons from Lignumvitae Basin and from Manatee Bay. Note that in the Lignumvitae data there is no correlation between the two isotopes (R' = )as predicted from an absence of a correlation in the two isotopes in the water at that site. In Manatee Bay however there is a correlation between the two isotopes which is statistically significant at the 99% level (R- = their skeletons, while corals influenced by runoff should have a better correlation. These correlations can be seen in data from the coral collected from Manatee Bay which shows a strong positive conelation between skeletal S'^C and S'^O (R = .42. n = 362, p > .0001). In contrast, corals from Lignumvitae Basin show no coiTelation between the two isotopes (R = , n = 1894, p = not significant) (Text-fig. 12). These cor- relations are similar to the relationships seen between the 5"C and 8"*0 of waters. For example, results from a linear regression model between 8"C of DIC and salinity has an R- of (Table 2). In western-middle Florida Bay, where the Lignumvitae Basin is located, an R- of is obtained (Table 2). Application to Existing Paleoenvironmental Data Combining the salinity relationship beteen Lignum- vitae Basin along with S'^^O record of the coral skel- eton collected from Lignumvitae Basin, attempts have been made at estimating salinity variations in other regions of Florida Bay (Swart et 1996; 1999). Based on data presented in this paper, however, the equation linking the skeletal 8'*0 and salinity in Lig- numvitae Basin (Swart el 1999) is not valid for other areas of Florida Bay. Consequently different equations for estimating salinity from 8'*0 need to be derived for every location. While this is impractical in
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