The paper gives a brief account for the colonization, dominant species and difference in species number of intraglacial diatom within the fast-ice area of different locations in the continental margin of Weddell Sea, Antarctica, and makes a preliminary analysis of these phenomena. 本文简述南极威德尔海陆缘不同地理位置的固冰区冰内硅藻的集群现象,优势种及种数量的差别,并对这些现象作一些初步的讨论。