水土保持对区域植被演替的影响——以黄土高原地区为例

 在综述已有研究的基础上,结合实地调查,初步分析了水土保持对植被演替影响的主要方式,不同水土保持措施(工程措施、人工恢复植被、水土保持生态自我修复)对植被演替所产生的影响。结果表明,水土保持生态自我修复下的植被演替趋向自然演替过程,而人工恢复植被的影响取决于物种选择与营造方式,不当的物种及纯林营造,往往使植物群落结构单一化,植被正常演替中断或逆向发展。反之,则可促进植被正常演替,缩短植被恢复过程。工程措施对植被演替的影响,可能更多地表现其对植物群落空间分布格局方面。但要全面科学地认识和评价水土保持对区域植被演替的影响,仍需系统的调查研究。

Impacts of soil and water conservation on regional vegetation succession:A case study of Loess Plateau

Based on studying the existing research results and field investigation, the main mode of vegetation succession affected by soil and water conservation, the influence of different soil and water measures (engineering measures, artificial plant rehabilitation, natural eco-restoration) on vegetation succession is analyzed. The results showed that the vegetation succession trend to natural succession under natural eco-restoration. However the influence of artificial plant rehabilitation was restricted completely by choice of species and planting patterns. Normal succession can be accelerated by suitable species and mixed structure; normal succession can be interrupted or conversed by unsuitable species and simple forest planting. The influence of engineering measures on vegetation succession may mainly exhibit on the spatial distribution of vegetation communities. In order to understand and estimate the influence of soil and water conservation measures on regional vegetation succession, the research and investigation should be comprehensive, systemic and scientific.