摘要
利用地衣和苔藓化学分析资料对南极菲尔德斯半岛地区地衣和苔藓中化学元素的分配、相关性及其元素比值关系进行了分析。研究表明，地衣和苔藓促进了土壤与风化壳的发育，但受南极地区恶劣环境条件的限制，生物地球化学过程极其微弱。地衣和苔藓植株体中Ｆｅ、Ａｌ、Ｍｎ等元素丰度主要依赖于土壤与风化壳元素丰度的高背景值。Ｃａ、Ｋ、Ｃｒ等元素是地衣选择性吸收较强的元素，苔藓对Ｍｇ、Ｎａ、Ｚｎ等元素则具有较强的选择性吸收能力。
The distribution,interrelation and ratio of chemical elements are discussed according to the chemical composition of the moss and lichen in this area. Results show that moss and lichen promote the weathering of soils,though the biogeochemical process is quite slight because of the Antarctic environmental condition. The concentrations of Fe,Al and Mn are primarily controlled by the background level in the underlying soils.Ca,Mg,K,Na,S and some trace elements are selectively absorbed by moss and lichen,but their absorptivities are different. Ca,K and Cr are the elements that can be strongly absorbed by lichen while Mg,Na and Zn are strongly absorbed by moss.
出处
《极地研究》
CAS
CSCD
1997年第4期299-303,共5页
Chinese Journal of Polar Research
