The Characteristics of Phytoplankton Community of Cold Water in the around Sea of Wando in Summer, 2005

Abstract

The data of temperature, chlorophyll a, phytoplankton and NOAA/AVHRR satellite data were analyzed about 7 stations around Wando Island area on August 30, 2005. The sea water temperature range was from <TEX>$15.19^{\circ}C$</TEX> to <TEX>$24.97^{\circ}C$</TEX>, and there was a cold water mass from the station 1 to 5 around the outside of Chungsando Island, the water temperature was lower at the bottom than surface. The salinity was <TEX>$32.41{\sim}34.03$</TEX>, DO was <TEX>$7.40{\sim}9.14mg/L$</TEX>, but the concentration of chlorophyll a was 1ug/L higher at the bottom than surface. Total phytoplankton appeared from the whole stations were 47 genus, 80 species and diatoms were dominant. A lot of dinoflagellates Ceratium forca and diatoms Thalassithrix spp. mostly appeared in the cold water mass were turned up from the station 1 to 5. 4 groups of phytoplankton clusters were shown in the surface, and 3 groups of phytoplankton clusters were shown at the bottom according to the water temperature. On the ground of the result analyzed with NOAA/AVHRR satellite data, the SST around Wando Island was <TEX>$22{\sim}25^{\circ}C$</TEX>, it was formed by thermohaline front latitudinally