江牡岛周边海域浮游生物群落特征及影响因素

打开文本图片集

中图分类号：Q178 文献标志码：A 文章编号：1004—6755（2025）10—0048—04

DOI：10.3969/j.issn.1004-6755.2025.10.013

Abstract：To explore the characteristics and influencing factors of plankton in the waters surrounding a developed island，four sampling transects with three stations each were established around Jiangmu Island in September 2O22. Water quality monitoring was conducted at allstations，while plankton surveys were performed at eight of them.The results indicated that the water quality around Jiangmu Island was good， meeting Class I to Class I standards. A total of 106 phytoplankton species were identified，including 82diatoms，22 dinoflagellates，and 2 cyanobacteria，the mean values of the Shannon diversity index （H′） ，richness index （D） ，and evenness index（J）were 3.93，2.696，and 0.776，respectively. For Zooplankton，45 species were recorded，with copepods comprising 20 species，folowed by planktonic larvae and cnidarians（8 species each），tunicates（3 species），cladocerans and chaetognaths（2 species each），and ostracods and decapods（1 species each），the mean values of the Shannon diversity index，richness index，and evenness index were 2.732，1.948，and O.628，respectively. Pearson correlation analysis revealed that the diversity indices of phytoplankton showed a significant negative correlation with mercury.Similarly，the diversity indices and total density of zooplankton were significantly negatively correlated with heavy metals and nitrogen concentrations.

Key words：Jiangmu Island；environmental factors；phytoplankton； zooplankton；diversity index

红海湾位于广东汕尾红海湾经济开发区[]，江牡岛是红海湾中部的无居民海岛，距陆地

3.69km ，由岛陆、潮间带和周边海域生态系统组成，空间尺度小，生态承载力低，对外界干扰十分敏感[2]。（剩余5331字）