摘要
从灌丛沙堆的形成演变、形态特征及其空间格局、表面气流特征及其风蚀堆积平衡、表面植被生态生理特性及其对降水和地下水的响应、土壤理化性质和保育措施等几个方面进行综述。认为目前灌丛沙堆研究只是针对某一区域或多个区域的静态研究,对灌丛沙堆演化过程中的形态、气流、土壤以及植被等因素的变化特征及其相互作用研究不足,难以解释灌丛沙堆的演化机制及其影响因素。同时灌丛沙堆研究过于强调其作为土地退化的指示,而忽略了其在退化生态系统中的重要生态功能,不利于干旱和半干旱区的生态环境恢复。今后的研究应该加强对灌丛沙堆演化过程中的土壤、植被、水分的变化特征及其不同影响因素之间相互作用过程的研究,深入探讨灌丛沙堆在干旱半干旱退化生态系统中的积极作用。基于以上基础数据和理论依据,对灌丛沙堆的保育措施进行探索,找出合理的灌丛沙堆保育措施。
Nebkhas is a common relief type in arid and semi-arid areas, which plays an important role in the stablization of ecological environment in these areas. This paper reviews the following aspects, including formation and succession, spatial distribution, shape characteristics, surface airflow characteristics and balance between erosion and deposition, ecological and physiological characteristics of vegetation. It also focuses on its response to precipitation and underground water, soil properties as well as the protection measures. We found that there had been limited studies on nebkhas, in which succession periods were not differentiated, shape characteristics, surface airflow, soil and vegetation dynamics in different succession periods were not fully understood. So it is difficult to explain succession dynamics of nebkhas and its affecting factors.
出处
《地理学报》
EI
CSCD
北大核心
2010年第3期339-350,共12页
Acta Geographica Sinica
基金
地表过程与资源生态国家重点实验室项目资助(2008-ZZ-02)
"十一五"国家科技支撑计划(2006BAD26B0302)
2009青年教师起步资助计划(37000-3126171)~~
关键词
灌丛沙堆
演化过程
保育措施
生态功能
Nebkhas
succession period
protection measures
ecological function
