Deep-water occurrence of the moss Bryum pseudotriquetrum in Radok Lake, Amery Oasis, East Antarctica
Deep-water occurrence of the moss Bryum pseudotriquetrum in Radok Lake, Amery Oasis, East Antarctica
复制标题
南极洲东部阿默里绿洲拉多克湖深水出现的苔藓 Bryum primetriquetrum
作者：
B. Wagner;R. Seppelt
苔藓是南极洲陆地和湖泊生态系统植物群的重要组成部分。本文报道了东南极洲埃默里绿洲拉多克湖的藓类植物。它被认为是南极洲最深的淡水湖。水生苔藓，确定为真藓，被发现在水深达81米，生长在沉积物表面在不同的位置在湖盆。这是南极湖泊中现存苔藓的最深记录。拉多克湖的现代寡到超寡营养的水文特征可能是这些水深的苔藓生长的一个不可或缺的先决条件。
Mosses form an important component of the flora in terrestrial and lacustrine ecosystems of Antarctica. Here we report the occurrence of mosses in Radok Lake, Amery Oasis, East Antarctica, which has a maximum water depth of c. 360 m and is presumed to be the deepest freshwater lake in Antarctica. Aquatic mosses, determined as Bryum pseudotriquetrum, were found at water depths of up to 81 m, growing on the sediment surface at different locations in the lake basin. This is the deepest record of living mosses in Antarctic lakes. The modern oligo- to ultra-oligotrophic hydrological characteristics of Radok Lake may be an indispensable precondition for the growth of the moss at these water depths.