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以科尔沁沙地典型流动沙丘作为研究对象,通过调查不同坡度地形上掘穴蚁的蚁丘直径、密度和盖度分布,讨论了不同坡度地形对掘穴蚁筑丘活动的影响,并分析了掘穴蚁筑丘对不同坡度地形土壤的作用。结果表明,迎风坡和背风坡的坡底、坡中及丘顶对蚁丘直径、密度和盖度分布影响明显,其中蚁丘直径迎风坡坡中显著小于其他坡度地形(P<0.05);密度和盖度分布顺序均表现为:丘顶>坡中>坡底。掘穴蚁筑丘改变了土壤性状,导致土壤含水量升高,pH值变小而电导率变大,有机质和全氮含量增加;微地貌条件下,蚁丘含水量和全氮含量迎风坡坡底较高,而蚁丘有机质含量背风坡坡底较高,但蚁丘土壤pH值和电导率丘顶较小。整个流动沙丘土壤基质均比较疏松,流动沙丘微环境易受风力作用而改变,从而影响掘穴蚁的筑丘活动分布,但不同坡度地形间蚁丘分布差异基本上均没有达到显著水平(P>0.05)。
Taking the typical mobile sand dunes in Horqin sandy land as the research object, the effects of different slope topography on the activities of burrowing ants were discussed by investigating the distribution of anthill diameter, density and cover of anthill on different slope topographies. The Effect of Cavents and Ants on Different Slope Topographic Soils. The results showed that the bottom, slope and hilltop of windward slope and leeward slope had significant influence on the distribution of anthill diameter, density and cover, in which the diameter of anthill was significantly smaller than that on other slopes (P <0.05); the density And cover the distribution of the order showed as follows: hill top> slope> slope bottom. Burrowing ants mound changed the soil properties, resulting in increased soil moisture content, pH value smaller and conductivity larger, organic matter and total nitrogen increased; micro-topography conditions, anthill hill moisture content and total nitrogen content windward slope The bottom of the leeward slope of the organic matter content of anthill was higher, but the soil pH value and conductivity of the anthill had smaller hilltops. The soil matrix of mobile sand dunes is relatively loose, and the micro-environment of mobile sand dunes is susceptible to changes in the wind force, thus affecting the distribution of burrowing activity of burrowing ants, but basically no significant differences were found in anthill distribution among different slope topographies (P> 0.05).