半干旱沙区流动沙丘与丘间低地过渡带的植被空间变化过程  

Vegetation Processes of Transition Zones between Active Dunes and Interdune Lowlands in Semi-arid Dune Areas

作　　者：闫守刚[1] 许清涛[1] 曹凤伟[1] 

机构地区：[1]白城师范学院,白城137000

出　　处：《东北林业大学学报》2014年第10期60-64,共5页Journal of Northeast Forestry University

基　　金：吉林省教育厅"十二五"科学技术研究项目(2013第392号;第391号);吉林省科技发展计划项目(20120408);吉林省重点科技攻关项目(20130206027NY)

摘　　要：以流动沙丘—丘间低地过渡带为研究对象,研究了不同生态组群植物侵入迎风坡过渡带的时间顺序,分析了过渡带变化对流动沙丘—丘间低地单元植被格局的影响。结果表明:(1)流动沙丘区的沙埋导致背风坡过渡带部分沼泽—草甸植物退出丘间低地,风蚀导致典型沙生植物侵入迎风坡过渡带,从而在丘间低地呈现出一种特有的植被空间动态变化过程;(2)芦苇和黄柳对于迎风坡过渡带植被恢复的作用大于沙蓬和乌丹蒿;(3)流动沙丘迎风坡—丘间低地过渡带植物种类比流动沙丘的多、但远比丘间低地少,具有流动沙丘区特有的边缘效应。We studied the transition zones between active sand dunes and interdune lowlands,chronological orders that the plants of different ecological groups invaded transition zones between windward slopes of active sand dunes,and the effects of transition zone＇s dynamics on vegetation patterns in active dune-interdune lowlands. The sand burial of active sand dunes leaded to the disappearing of parts of limnocryptophyte-meadow plants from interdune lowlands,eolian erosion of active sand dunes resulted in the invading of psammophytes into transition zones between windward slopes of active sand dunes and interdune lowlands with a typical vegetation succession in active sand dune fields. The roles of Phragmites communis and Salix gordejevii to revegetations of active sand dunes were more than those of Agriophyllum squarrosum and Artemisia wudanica. The plant species of transition zones between windward slopes of active sand dunes and interdune lowlands were more than those of active sand dunes,greatly fewer than those of interdune lowlands with a typical edge effect in active sand dune fields.

关 键 词：生态组群 植被入侵 过渡带 植物多样性 边缘效应 

分 类 号：Q148[生物学—生态学]