Summer activity patterns for mosses and lichens in Maritime Antarctica

摘要: Within Antarctica there are large gradients both in climate and vegetation which offer opportunities to investigate links between the two. The activity (% total time active) of lichens bryophytes hydric xeric environments was monitored at Livingston Island (62°39'S). This adds a northern site with maritime, cloudy previous studies southern Antarctic Peninsula Dry Valleys (78°S). Annual increases northwards from less than 1% nearly 100%. There is major consistent difference sites which, snow melt, can be 100% active summer months even Valleys, depending on precipitation, rarely exceed 80% Island. Mosses dominate all along gradient. Mean temperatures when 2–4°C sites, as liquid water required. Light potential stress reaching 880 µmol m -2 s -1 continental sites. lack extremes light combined high levels means that one better for lichen bryophyte growth world.