Structure and Function of Two Antarctic Terrestrial Moss Communities

摘要: Two bryophyte-dominated communities in the maritime Antarctic are analyzed terms of transfer and standing crops organic matter within them. A moss turf dominated by Polytrichum alpestre Chorisodontium aciphyllum a carpet composed Calliergon sarmentosum, Calliergidium austro-stramineum, Drepanocladus uncinatus with liverwort Cephaloziella varians were investigated at Signy Island, South Orkney Islands. Biomass, respiration, production data for primary producers (mosses, lichens, liverworts, algae), fauna (Protozoa, Rotifera, Tardigrada, Nematoda, Acari, Collembola), microflora synthesized, annual rates consumption, egestion, assimilation, derived. The two showed similar levels productivity, trophic structure, efficiencies transfer, but different Collembola Acari crops, turnover mosses, accumulation dead matter. These features discussed relation to role biotic abiotic variables determining community structure function.