Factors influencing small-scale distribution of 10 macrolichens in King George Island,West Antarctica  

作　　者：LIU Huajie WU Qingfeng FANG Shibo 

机构地区：[1]Key Laboratory of Microbial Diversity Research and Application of Hebei Province,College of Life Sciences,Hebei University,Baoding 071002,China [2]Institute of Eco-environment and Agro-meteorology,Chinese Academy of Meteorological Sciences,Beijing 100081,China

出　　处：《Advances in Polar Science》2012年第3期141-148,共8页极地科学进展（英文版）

基　　金：funded by the the Polar Science Strategic Research Foundation of China(Grant no.20080205);National Natural Science Foundation of China(Grant nos.30700107,31000239);Natural Science Foundation of Hebei Province(Grant no.C2010000268)

摘　　要：Lichens are among the main primary colonists in most terrestrial ecosystems of Antarctica, where the effects of environmental factors on spatial distribution of lichens are essential to understanding the functioning of Antarctic terrestrial ecosystems. We measured abundance of 10 frequently observed macrolichens and 15 environmental factors at a small scale （20 cm× 20 cm）, in the ice-free areas of Fildes Peninsula and Ardley Island, King George Island, West Antarctica, and assessed the effects of environmental factors on the local distribution of these lichens. Canonical correspondence analyses （CCA） show that 8 out of 15 environmental factors, belonging to 4 sets of variables, are important in spatial distribution of the 10 lichens. Variation partitioning analyses show that most of the variation in distribution of the 10 lichens is described by the spatial heterogeneity of substrate, bird influence and microclimate and topography, whereas human impact has no significant effects.Lichens are among the main primary colonists in most terrestrial ecosystems of Antarctica, where the effects of environmental factors on spatial distribution of lichens are essential to understanding the functioning of Antarctic terrestrial ecosystems. We measured abundance of 10 frequently observed macrolichens and 15 environmental factors at a small scale （20 cm× 20 cm）, in the ice-free areas of Fildes Peninsula and Ardley Island, King George Island, West Antarctica, and assessed the effects of environmental factors on the local distribution of these lichens. Canonical correspondence analyses （CCA） show that 8 out of 15 environmental factors, belonging to 4 sets of variables, are important in spatial distribution of the 10 lichens. Variation partitioning analyses show that most of the variation in distribution of the 10 lichens is described by the spatial heterogeneity of substrate, bird influence and microclimate and topography, whereas human impact has no significant effects.

关 键 词：bird disturbance canonical correspondence analysis lichen ecology maritime Antarctica soil accumulation 

分 类 号：P731.23[天文地球—海洋科学] Q913.84[天文地球—古生物学与地层学]