Variarion of chlorophyll a in Haitan Bay of Pingtan County,Fujian Province,China

The marine environmental status in Haitan Bay, Fujian Province, China, was monitored during June and November, 2013. The concentration of chlorophyll a (Chl a) was analyzed to assess its spatial and seasonal variability as well as the correlations with environmental and biological variables. The average Chl a concentration in Haitan Bay in spring and autumn were 3.1 mg/m3 and 1.1 mg/m3, respectively, higher than and approximately equal with the historical concentration of Chl a in the bays of northern Fujian and Taiwan Strait in spring and autumn, respectively. Chl a concentration decreased from inner Haitan bay to outer bay in spring and increased in autumn. The analysis showed good correlations between the concentration of Chl a with salinity, nutrients and density of zooplankton in spring, and with suspended solid in autumn.