Comparisons of soil animal community characteristics of subalpine meadow between winter and spring in Miyaluo.
Comparisons of soil animal community characteristics of subalpine meadow between winter and spring in Miyaluo.
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发表时间：
2009
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通讯作者：
W. Pengfei;Liu Xingliang;Liu Shirong
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作者：
W. Pengfei;Liu Xingliang;Liu Shirong
2007年11月和2008年4月，对川西北米亚罗地区亚高山草甸土壤动物群落进行了调查，共采集大型土壤动物320只，结果表明，大型土壤动物群落的优势类群为双翅目幼虫，鞘翅目幼虫和成虫的发育速率均高于中、小型鞘翅目幼虫和成虫，土壤动物群落结构冬、春季变化明显，但两个季节之间的种群数量和个体数量变化不明显中小型土壤动物群落的Margalef指数从冬季到春季显著下降（P0.05土壤动物类群数和个体数均显著减少（P0.05），但其它多样性指标变化不显著（P <0.05）土壤动物群落的物种组成在春、冬两季间差异不显著，川西北亚高山草甸生态系统中的蝗虫个体密度较高，与我国北方草原生态系统不同。
Soil animals are an important component part of the terrestrial ecosystem,and they could be used as indicator species to monitor and evaluate soil quality and health with effects on material cycles.The investigations were conducted on soil animal communities of the subalpine meadow in Miyaluo area,located in northwestern Sichuan,in November of 2007 and April of 2008.A total of 320 large-sized soil animals,belonging to 2 phyla,4 classes and 15 groups or orders,and 6,081 middle-small-sized soil animals,belonging to 4 phyla,7 classes and 16 groups or orders,were collected.The dominant groups of the large-sized soil animal community were Diptera larvae,Coleoptera larvae and Coleoptera adult while that of the middle-small-sized soil animal community was Nematoda.The community structures of soil animals changed significantly between the winter and spring,but the groups and individual numbers between the two seasons did not change significantly(P0.05).The Margalef index of the middle-small-sized soil animal community significantly declined from winter to spring(P0.05) but the other diversity indexes did not change significantly.The number of groups or individual soil animals decreased significantly(P0.05) with soil depth but the differences between the seasons of spring and winter were not significant.The species compositions of soil animal communities in subalpine meadow ecosystems in northwestern Sichuan have higher individual densities that are different from those of the grassland ecosystems in the north of China.