Standing stock of phytoplankton and primary productivity in Penaeus orientalis larval multiplication releasing area Of the Xiangshan Bay

摘要

The standing stock of phytoplankton (phy.) and primary productivity (pp) in the Xiang- shan Bay were observed in 1992. The results showed higher biological parameters in the bay. The aver- age chlorophyll a (chl a) concentration was (3.50 ± 5.93) mg/m~3 and the primary productivity (444.5 ±871.0) mg/(m~2 ·d). The distribution of chl a and productivity showed distinct spatial and temporal patterns in the bay. The continent influence was obvious at the top of the bay, lower seawater exchange and higher stability led to higher standing stock of phytoplankton and productivity. At the bay mouth, seawater exchanged continuously with adjacent waters by rapid currents, resulting in fast and unstable exchange and lower standing stock of phytoplankton and primary productivity.