Current status of phytoplankton community in green tide area of radial sand ridges during prevention of Ulva prolifera
ZHU Xuyu
GE Yuehao
YANG Bo
DING Yanzhe
BEN Chengkai
XIAO Yueyue
ZHANG Hu
Abstract：From November 2019 to May 2020,a continuous human intervention was carried out in the occurrence of Ulva prolifera in the green-tide area of radial sand ridges.To understand the change of phytoplankton community,we documented phytoplankton composition and environmental parameters in green-tide area(120°00′0″～124°00′0″E,32°00′0″～34°00′0″N)in April in 2019(before prevention of U.prolifera)and 2020(after prevention of U.prolifera).A total of 4 phyla,33 genera,53 species were identified in 2019,which mainly included 43 diatom species,7 dinoflagellate species,and 5 other taxonomic(Chrysophyta and Cryptophyta)species.A total of 6 phyla,49 genera,72 species were i-dentified in 2020,which included 51 diatom species,13 dinoflagellate species and other taxonomic(Eu-glenophyta,Chlorophyta,Chrysophyta,Cryptophyta)species.A total of 11 dominant phytoplankton species were found.Diatoms dominated the phytoplankton community,of them Paralia sulata was the top dominant species in 2019 and 2020.The average cell abundance in spring 2019(1.39× 104 cells/L)was lower than that in spring 2020(2.06 × 104 cells/L).Both the phytoplankton community parame-ters(species number,Shannon-Wiener diversity index,Margalef richness index)and environmental factor(temperature,suspended solids,pH,dissolved oxygen,turbidity)were different between the two years.Spearman analysis and redundancy analysis showed that pH,dissolved oxygen,salinity,nu-trients and suspended solids were the main factors influencing phytoplankton community.
Keywords：phytoplanktonradial sand ridgescommunityenvironmental factorgreen tide
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 146-154 )