Table 2.

Seasonal differences (wet vs. dry) in environmental and geochemical variables within Panamá sites

Variable	Gulf of Chiriquí		Gulf of Panamá
	U	P	U	P
Temperature	1,371	NS	222	< 0.001
Salinity	666	< 0.0001	78	< 0.001
TCO2	753	< 0.0001	78	< 0.001
TA	721	< 0.0001	78	< 0.001
pH	1,812	< 0.01	151	NS
pCO2	1,075	< 0.0001	103	< 0.01
Ωarag	1,393	NS	186	< 0.05

U is the calculated Mann-Whitney statistic, and P is probability that the two distributions were not significantly different. NS, not significant.