生态学杂志2011，Vol.30Issue(11)：2389-2393,5.
科尔沁沙地刺榆局域成林机制
Local formation mechanisms of Hemiptelea davidii forest in Keerqin Sandy Land of North China
摘要
Abstract
Hemiptelea davidii forest is a peculiar forest type in Keerqin Sandy Land not recorded in references so far. Aimed to understand the biological and ecological mechanisms of the regeneration and expansion of H. Davidii, a sampling line transect survey was conducted on the seed dispersal and seedling recruitment of H. Davidii in its forest edges and forest understory, and an observation was made on the fruit shape and fruit-shedding characteristics of the plant. A majority of H. Davidii seeds were found in the understory and around the edges, and the seed rain density decreased significantly beyond 3 m of the edges. Within the stands with high coverage, the regeneration of H. Davidii population was mainly relied on root sucker recruitment. Because the distribution of H. Davidii seedlings was not limited by terrain, the spatial expansion of the forest was mainly relied on the seedlings. Based on the observation on the fruit shape and fruit-shedding characteristics, it was considered that the biological features of H. Davidii fruits could be the foundations of the local formation of H. Davidii in Keerqin Sandy Land, whereas in other geographic distribution regions, H. Davidii could only be a companion species.关键词
刺榆/种子雨/实生苗/根蘖苗/科尔沁沙地Key words
Hemiptelea davidii/ seed rain/ seedling/ root sucker/ Keerqin Sandy Land.分类
农业科技引用本文复制引用
杨允菲,白云鹏,李建东..科尔沁沙地刺榆局域成林机制[J].生态学杂志,2011,30(11):2389-2393,5.基金项目
国家自然科学基金项目(31170504,30770397)资助. （31170504,30770397）
