Structure and Function of Two Antarctic Terrestrial Moss Communities
Structure and Function of Two Antarctic Terrestrial Moss Communities
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两个南极陆地苔藓群落的结构和功能
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
R. Davis
中科院分区：
文献类型：
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作者：
R. Davis
本文分析了南极海域以苔藓植物为主的两个群落的有机质转移和生物量。在南奥克尼群岛的西格尼岛，研究了一种以紫毛霉和紫毛霉为主的苔藓草皮，以及一种由沙门绿毛霉、奥氏绿毛霉和钩孔棘毛霉和变种头孢霉组成的苔藓地毯。合成了主要生产者（苔藓、地衣、苔类和藻类）、动物群（原生动物、轮虫、缓步动物、线虫、蜱螨和线虫）和微生物群的生物量、呼吸和产量数据，并得出了年消耗、消化、同化和产量的速率。两个群落在生产力、营养结构和有机质转移效率方面表现出相似的水平，但弹线虫和刺螨直立作物、苔藓周转量和死有机质积累方面存在差异。这些特征讨论了生物和非生物变量在决定群落结构和功能中的作用。
Two bryophyte-dominated communities in the maritime Antarctic are analyzed in terms of the transfer and standing crops of organic matter within them. A moss turf dominated by Polytrichum alpestre and Chorisodontium aciphyllum and a moss carpet composed of Calliergon sarmentosum, Calliergidium austro-stramineum, and Drepanocladus uncinatus with the liverwort Cephaloziella varians were investigated at Signy Island, South Orkney Islands. Biomass, respiration, and production data for the primary producers (mosses, lichens, liverworts, and algae), for the fauna (Protozoa, Rotifera, Tardigrada, Nematoda, Acari, and Collembola), and for the microflora were synthesized, and annual rates of consumption, egestion, assimilation, and production were derived. The two communities showed similar levels of productivity, trophic structure, and efficiencies of organic matter transfer, but different Collembola and Acari standing crops, turnover of mosses, and accumulation of dead organic matter. These features are discussed in relation to the role of biotic and abiotic variables in determining community structure and function.