Experimental Studies on Vegetating Potential on Bare Ground in Antarctica

概要

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A field experiment designed to enhance the in situ conditions in order to stimulate the development of the potential community lying dormant in the soil,using acrylic domes(chamber) was made at the Yukidori Valley,Langhovde,Antarctica The 19 chambers were placed on the bare ground for 38 days in austral summer. The average temperature in the chambers recorded was 8.2°C higher than that of the control. Except chambers located near stream,water contents were low before and after the experiment. After the experiment,new bryophyte cover of Bryum pseudortiquetrum emerged from the buried old bryophyte clump in the chamber located in the middle of the stream. The soil had relatively high water content in this chamber. When some environmental factors such as temperature are altered,bryophyte colonization from buried moss clump may be possible at the wet site. Diaspores of B. pseudotriquetrum and Ceratodon purpureus were observed in the sampled surface soils,and some diaspores germinated already before the experiment. No significant differences were observed in the germination rates between before and after the experiments. Considering the result of our field experiment,the possibility for the bryophyte colonization on dry ground seems to be low.
八戸工業大学の論文
2005-02-28