Red tide characteristics of phaeocystis globosa in the northeast sea area of Rizhao and its main influencing factors
YU Meibo
HE Dongxiao
WEI Haiying
LIU Mei
SUN Yuanyuan
YU Weimin
JIANG Lei
Abstract：By investigating the red tide of Phaeocystis globosa in the near coast of Rizhao City in Decem-ber,2021,the process of occurrence and disappearance of red tide of P.globosa was analyzed,and the characteristics of changes in major marine environmental factors before and after the occurrence of the red tide were discussed.Our analysis showed that the abundance of P.globosa glial vesicle at the early stage of the red tide each station varied between 20 and 60 pieces/L,and the cell abundance between 1.23×107 and 1.8× 108 cells/L.The red tide outbreak was related to abnormal weather conditions,special geographical locations,high concentrations of inorganic-N in marine areas and sudden increase labile phosphate.Chlorophyll a and silicate were positively correlated with the abundance of P.globosa cell.The red tide of P.globosa began to erupt at the water temperature 13 ℃,and the sudden temper-ature decrease was the main reason for the disappearance of the red tide.Our findings provided a refer-ence to the red tide of P.globosa for early warning.
Keywords：Phaeocystis globosaInorganic-Nlabile phosphatered tide
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 146-153 )