【摘要】 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,呈显著正相关(P<0.01)。更多还原

【Abstract】 The investigations of soil macrofauna were conducted in different types of tundra in Da Hinggan Mountains.The results showed that soil macrofauna were divided into three guilds,i.e.saprophage,phytophage and predacity.The correlation between the level distribution of soil macrofauna 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),meanwhile,the 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 soil macrofauna and soil temperature showed that the number of individuals of soil macrofauna was significantly positively related to soil temperature in island thawing tundra,of which saprophagous animals was significantly positively related to soil temperature in island thawing tundra in August.A significant positive correlation was observed between the number of saprophagous animals and the number of predatory animals(r= 0.8723,P<0.05),and the significant positive correlation was found between biomass of saprophagous animals and predatory animals(r=0.7551,P<0.01).更多还原