STRUCTURE AND FUNCTION OF 2 ANTARCTIC TERRESTRIAL MOSS COMMUNITIES
STRUCTURE AND FUNCTION OF 2 ANTARCTIC TERRESTRIAL MOSS COMMUNITIES
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DOI：
10.2307/2937260
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发表时间：
1981-01-01
影响因子：
6.1
通讯作者：
DAVIS, RC
中科院分区：
文献类型：
--
作者：
DAVIS, RC
在海洋南极洲的两个britonite占主导地位的社区进行了分析，在他们的有机质的转移和常设作物。在南奥克尼群岛的Signy岛，调查了以高山金发藓（Polytrichum alpestre）和Chorisodontium aciphyllum为主的藓类草坪，以及由Calliergon sarmentosum、Calliergidium austro-stramineum和Drepanocladus uncinatus组成的藓类地毯，并观察了苔类植物Cephalziella varians。生物量，呼吸，和生产数据的初级生产者（苔藓，地衣，苔类和藻类），动物（原生动物，轮虫，缓步动物，线虫，阿卡里和弹尾目），和微生物植物群的消费，排泄，同化和生产的年速率的推导。2个群落的生产力、营养结构和有机质转移效率相似，但弹尾目和阿卡里现存量、苔藓周转量和死有机质积累量不同。这些功能的生物和非生物变量在确定社区结构和功能的作用进行了讨论。
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 2 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.