南极附近水域微小型藻类的研究 Ⅳ．中山站潮间带微小型硅藻的分布

本文首次报道东南极中山站沿岸潮间带冰融期砂和砾质砂中微小型硅藻的分布、种类组成及各站位间种类组成的相似性。中山站潮间带微小型硅藻主要分布在中山湾Ｂ站，１９８９年１月和１９９０年２月每克砾砂细胞丰度分别在０．８×１０３～３６５１×１０３个和４．５×１０３～２６１８×１０３个，并具有细胞个体小、丰度大等特点，其优势种为冰川舟形藻Ｎａｖｉｃｕｌａｇｌａｃｉｅｉ。

STUDY ON NANO- AND MICROALGAE IN ADJACENT WATERS OF ANTARCTICA Ⅳ. DISTRIBUTIONS OF NANO- AND MICRODIATOMS IN THE INTERTIDAL ZONES OF ZHONGSHAN STATION

This paper first presents the composition and distribution of nano- and microdiatoms in sand and grit covered by ice and snow in the intertidal zones of the Zhongshan Station in Larsemann Hills ( 69 °21′～69°25′S, 76°00′～76 °25′E) , East Antarctica. The samples were collected from seven sand grit flat stations in January 1989 and February 1990. The maximum of the cell abundance of nano- and microdiatoms occurred at Station B. The cell abundance was 0.8×10 3～3651×10 3 and 4.5×10 3～2618×10 3 cells per gram sand in January 1989 and February 1990 respectively. The distributional characteristics of nano- and microdiatoms in the intertidal zones was small cell size and high cell abundance. The dominant species was Navicula glaciei .