progressive succession

Dominant populations and its root characteristics in progressive succession of desertification land in arid area

干旱区沙漠化逆转过程中优势种群及其根系特征研究

The low species richness and evenness , and restricted progressive succession were mainly determined by grazing .

放牧干扰是灌木层与草本层物种丰富度与均匀度较低及灌丛难以实现进展演替的主要原因。

The sampled secondary forest communities are abundant in species and possess relatively stable community structures , and sound eco-benefit provide the possibility for the progressive succession of community .

调查的次生林群落的物种丰富，种群结构已相对比较稳定，生态效益好，符合群落的顺行演替。

The protective management strategy should be adopted for ⅰ,ⅱ and ⅲ 1 zones . For ⅲ 2 and ⅲ 3 subzones , the management strategy should be to restore and increase biodiversity , and to promote progressive succession .

对Ⅰ、Ⅱ带及Ⅲ1亚带的植被宜采取保护性经营对策，对Ⅲ2、Ⅲ3亚带，采取恢复和提高其生物多样性，促进植被进展演替的经营对策。

Spontaneous recovery of vegetation is one of the effective approach , which can prevent biological invasion and guarantees ecological system security and promotes ecosystem progressive succession radically , and it is the widely supposed by international communities as major development tendency too .

植被自然恢复是从根本上防止生物入侵、保障生态系统安全、促进生态系统进展演替的有效途径之一，也是国际社会普遍认同的主要发展趋势。