大兴安岭冻土区土壤动物功能类群对地温变化的响应

The Response of Soil Fauna Guilds of Different Tundras in Daxingan Mountains to Soil Temperature

对大兴安岭不同冻土带土壤动物进行的研究，将该区土壤动物划分为植食性、腐食性和捕食性三个功能类群。土壤动物功能类群的水平分布与地温的相关性表明，不同冻土带腐食性土壤动物总的生物量和地温的相关系数为-0．999，呈显著的负相关（P〈0．05）；不同冻土带捕食性土壤动物总的生物量和地温的相关系数为-0．997，呈显著的负相关（P〈0．05）。土壤动物功能类群的垂直分布与地温的相关性表明，岛状融区冻土带土壤动物功能类群的垂直分布与8月份地温值呈显著正相关，岛状融区冻土带的腐食性动物的垂直分布与8月份地温呈显著正相关。各功能类群的个体数量相关分析结果表明，腐食性动物和捕食性动物相关系数为0．8723，呈显著正相关（P〈0．05）；生物量相关分析结果表明，腐食性动物和捕食性动物相关系数为0．7551，呈著正相关（尸〈0．01）。

This paper attempts to estimate the guilds and ecological distribution of soil animals in different tundras of Daxingan Mountains. The results showed that there were three guilds of soil animals, including herbivorous, saprophagous and predatory animals. The correlation between the level distribution of soil animal functional groups and soil temperature showed that the total biomass of saprophagous animals in different tundras was significantly negatively related to soil temperature （r=-0.999,P〈0.05）; total biomass of predatory animals in different tundra was significantly negatively related to soil temperature（r=-0.997, P〈0.05）. The correlation between the vertical distribution of functional groups of soil animal and soil temperature showed that the vertical distribution functional groups of soil animals in island thawing tundra was significantly positively related to soil temperature. The vertical distribution of saprophagous animals in island thawing tundra was significantly positively related to soil temperature. The correlation analysis of the individual number of functional groups results showed that saprophagous animals were significantly positively to predatory animals（r= 0.8723, P〈0.05）. Saprophagous animals were significantly positively to predatory animals（ r=0.7551,P〈0.01）.