3 Preface 前言 My first encounter to marine phytoplankton was in the class of Marine Plankton during my undergraduate studies in Xiamen University. Later, I had an opportunity to study the isolation, cultivation, and identification of marine diatom Skeletonema at the Third Institute of Oceanography, Ministry of Natural Resources, and started my journey in the world of phytoplankton. Phytoplankton are extremely small and with the exception of a few species, they are not visible to the naked eyes of a human being. Despite their small size, phytoplankton play a crucial role in marine ecosystems and global biogeochemical cycles due to their fast growth rate, wide distribution, and extremely high abundance. 我第一次接觸海洋浮游植物是在廈門大學讀本科時的海洋浮游生物學課程。 隨後 有幸在自然資源部第三海洋研究所學習分離、培養、鑒定海洋硅藻骨條藻，從此走 進了浮游植物的世界。 浮游植物極為微小，除少数物種外都不為人類肉眼所見。 儘管粒徑微小，浮游植物由於生長速度快，分佈廣泛，豐度極高，在海洋生態系統 和全球生物地球化學循環中起到了極為關鍵的作用。 There are many islands and bays in Hong Kong. The eastern, western, and southern regions exhibit different environmental characteristics. The diverse habitats result in high diversity of phytoplankton species in Hong Kong. Based on data from Agriculture, Fisheries and Conservation Department, Hong Kong (AFCD), there may be over 800 species of phytoplankton in Hong Kong. However, research on the diversity of phytoplankton in Hong Kong waters remains limited. Since 2018, we have conducted a two-year monitoring of phytoplankton species composition and abundance at 25 sampling stations in 10 water control zones of Hong Kong waters, through a project in collaboration with the Hong Kong Environmental Protection Department (Development of Supplementary Criteria to Improve Water Quality Assessment on Impacts of Nutrient Enrichment, Ref: 17-04208), and identified more than 250 species of phytoplankton.
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