中国水产科学2024，Vol.31Issue(6)：693-703,11.DOI:10.12264/JFSC2024-0064
七连屿浮游植物群落特征及其影响因子
Phytoplankton community characteristics and influencing factors in Qilianyu Island
摘要
Abstract
To provide reference for the protection and management of the ecological environment in the sea area around Qilianyu Island,the characteristics of phytoplankton communities and environmental conditions in this area were analyzed based on survey data of four voyages from 2018 to 2021.The results showed that 341 species of phytoplankton were identified from 111 genera of five phyla,with Bacillariophyta(69.21％)and Pyrrophyta(23.75％)as the major species.Phytoplankton abundance fluctuated in the range of(2.34-2 841.16)×103 cells/m3,with the highest mean value in autumn 2018(797.47×103 cells/m3),followed by summer 2018(675.40×103 cells/m3),with the lowest value found in summer 2020(91.39× 103 cells/m3).Phytoplankton abundance was mainly composed of Bacillariophyta(48.67％)and Cyanophyta(47.22％).Significant differences were observed in phytoplankton communities between the four periods(P=0.001).The diversity and evenness index of phytoplankton first increased and then decreased.The RDA analysis results showed that the main environmental factors affecting phytoplankton communities in Qilianyu Island were transparency,water depth,ammonia nitrogen,DIN,and N:P with dominant factors changing in different periods.The nutrient factor limiting phytoplankton growth in this area changed from nitrogen to phosphorus.The decrease in phytoplankton diversity may be related to a nitrogen-phosphorus ratio imbalance caused by a surge of nitrogen content in the sea area.Therefore,the discharge of nitrogen-containing wastewater must be reduced and the protection and management of the ecological environment in the sea area must be strengthened.关键词
浮游植物/演替/影响因子/七连屿/南海Key words
phytoplankton/succession/influencing factor/Qilianyu Island/the South China Sea分类
农业科技引用本文复制引用
粟丽,徐姗楠,李纯厚,陈作志..七连屿浮游植物群落特征及其影响因子[J].中国水产科学,2024,31(6):693-703,11.基金项目
农业农村部财政专项"南海渔业资源调查与评估"(NFZX2021) （NFZX2021）
农业财政项目"南海近海和外海渔业资源调查"(2021-2025) （2021-2025）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金资助项目(2023TD05). （2023TD05）
