草地灌丛化研究进展

Research progress on shrub encroachment in grasslands

在草地生态系统中,灌木入侵不仅会改变草本植物的分布格局,还对生态系统的结构和功能产生重要影响。灌丛化的成因、影响、时空动态一直是植被生态学研究的热点问题,这些问题的探究将有助于理解灌木在天然草原中的作用和地位,对干旱半干旱区植被的保护和恢复具有重要科学意义。综述了灌丛化的成因、入侵后对生态系统中植被与土壤的影响、草地灌丛化空间动态变化和草地灌丛化演替过程,以期为将来草地灌丛化的研究提供一些有益途径。

Shrub invasion could change the distribution pattern of herbaceous plants,and affect the grassland ecosystem structure and function.The causes,effects,spatial-temporal dynamics and succession process of shrub encroachment have become hot spot issues in vegetation ecology.The exploration of these questions will help to understand the role and status of shrubs in natural grassland,and have important scientific significance for soil and water conservation and ecological restoration of vegetation ecosystems in arid and semiarid areas.In this paper,the causes of shrub encroachment,the effects on the vegetation and soil,shrub succession process and spatial dynamics were all reviewed,providing useful direction for future research of shrub encroachment.