南极乔治王岛三种地衣体元素组成及其分布的测定分析

DETERMINATION AND ANALYSIS OF ELEMENT COMPOSITION AND DISTRIBUTION OF THREE KINDS OF LICHEN BY EDS IN KING GEORGE ISLAND,ANTARCTICA

将南极生长的南极石萝（ＵｓｎｅａａｎｔａｒｃｔｉｃａＤｕＲｉｅｔｚ）、蔟花石萝（Ｕｓｎｅａａｕｒａｎｔｉａｃｏ－ａｔｒａ（Ｊａｃｑ．）Ｂｏｒｙ．）和石蕊（Ｃｌａｄｏｎｉａｓｐ．）三种地衣分别对上部、中部和基部三部分作横切，用扫描电镜和能谱仪观察和测定各部位的表、间、中央各层的元素组成和相对含量，结果发现三种地衣体的组成元素基本相同；各部位的Ａｌ、Ｓｉ、Ｋ、Ｃａ四种元素的相对含量较高，Ｐ的相对含量相近；三种地衣体不同的部位、不同层的元素相对含量均不相同。

Cross section of Usneaantarctica Du Rietz, Usnea aurantiaco atra (Jacq.)Bory. and Cladonia sp. at upper, middle and base position were done. The element composition and relative content were determined by SEM and EDS at surface, intermediate and inner layer in each position. The result is that the composition of element is similar same in this three kinds of lichen. The relative content of Al,Si,K and Ca elements are high,and the relative content of P is close at each position.The relative content of every element is different at different position and different layer of lichens. The result is benefit to study the stucture and physiological characteristics of lichens, and to analyze geological environment in Antarctica.