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科尔沁沙地流动沙丘掘穴蚁蚁丘分布及影响因素

刘任涛;赵哈林;赵学勇   

  1. 中国科学院寒区旱区环境与工程研究所, 兰州 730000
  • 收稿日期:2008-06-25 修回日期:1900-01-01 出版日期:2009-02-20 发布日期:2009-02-20

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

LIU Ren-tao;ZHAO Ha-lin;ZHAO Xue-yong   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2008-06-25 Revised:1900-01-01 Online:2009-02-20 Published:2009-02-20

摘要: 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.

关键词: PROSPECT+SAIL模型, 生化参数, 植被指数, PSO算法, 代价函数

Abstract: 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.

Key words: PROSPECT+SAIL model, biochemical parameter, vegetation index, particle swarm optimization (PSO) algorithm, cost function.