장수만의 식물플랑크톤 생물량의 계절변동 특성

Seasonal Variations of Chlorophyll a Concentration in Jangsu Bay of South Sea, Korea

A characteristics of seasonal variations of water type and chlorophyll a concentration were carried out in Jangsu Bay, where located middle parts of Southern Sea of Korea during for seasons from May 2006 to February 2007. Water temperature, salinity and chlorophyll a concentration measured by submersible Fluorometer (Alec Co., ACL 1151-D) in site from surface to bottom layer. Seasonal changes of water type show to lower water temperature and high salinity in winter, but high temperature and lower salinity in summer. especially the high ranges of water temperature and salinity. chlorophyll a concentration at surface fluctuated with an annual mean of 2.61 ㎍/L between the lowest value of 1.22 ㎍/L in summer and autumn, and the highest value of 7.03 ㎍/L in spring. And the chlorophyll a for the seasons ranged from 2.01 ㎍/L (5m layer) to 7.03 ㎍/L (surface) with the mean value of 4.08 ㎍/L (surface) in spring, from 1.22 ㎍/L (surface) to 8.81 ㎍/L (2m layer) with the mean value of 4.30 ㎍/L (5m layer) in summer, from 1.22 ㎍/L (surface) to 1.65 ㎍/L (bottom) with the mean value of 1.44 ㎍/L (10m layer) in autumn, from 1.58 ㎍/L (surface) to 5.43 ㎍/L (bottm) with the mean value of 3.09 ㎍/L (10m layer) in winter. Expecially, chlorophyll a of surface and subsurface in the increasing temperature seasons was higher more than middle and bottom layers, but chlorophyll a of 10m and bottom layers in decreasing temperature seasons was more than surface and middle layers. Potential primary prodution by chlorophyll a concentration in Jangsu Bay that there are very higher all the year round.