科尔沁沙地流动沙丘掘穴蚁蚁丘分布及影响因素

以科尔沁沙地典型流动沙丘作为研究对象，通过样方法调查分析了不同地形上掘穴蚁的蚁丘密度、直径、盖度及其与土壤环境的关系，讨论了不同地形和土壤环境对掘穴蚁筑丘活动的影响，并探讨了蚁丘的空间分布格局.结果表明：受到地形变化影响的土壤环境和地形共同影响掘蚁穴的筑巢活动，蚁丘密度表现为丘顶>背风坡>迎风坡；蚁丘直径和盖度均表现为丘顶>迎风坡>背风坡，并且亦均受到蚁丘密度的制约.蚁丘的空间格局表现为随机分布型.地形及土壤环境的共同作用决定了掘穴蚁的筑巢行为.

Distribution of Formica cunicularia mound and related affecting factors on mobile dune in Horqin sandy land.

Taking the typical mobile dune in Horqin sandy land as test object, th e density, diameter, and coverage of Formica cunicularia mounds on different land forms were investigated by quadrate method, with the spatial distribution of F. cunicularia mounds and the effects of topography and soil property on F. cunicularia nest-building activities discussed. The results showed that the density of F. cunicularia mounds decreased in the order of ridge>leewar d slope>windward slope, while the diameter and coverage of the mounds were in t he order of ridge>windward slope>leeward slope and conditioned by mound densit y. The spatial distribution of F. cunicularia mounds was in random pattern. Topography and soil property co-affected the nest-building activities of F. cunicularia.