引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 108次   下载 0  
分享到: 微信 更多
不同替代修复年限对飞机草种群和植物群落结构的影响
朱金方, 李俊生, 赵彩云, 柳晓燕, 李飞飞
中国环境科学研究院环境生态研究所
摘要:
为研究替代修复对飞机草的治理效果以及对本地植物群落结构的修复效应,以广西喀斯特地区飞机草入侵生境为研究对象, 采用“空间代替时间”的方法,分析不同修复年限飞机草种群特征和植物群落结构的变化,结果表明:①随着修复年限的增加,飞机草密度、盖度、基径、生物量等指标均呈显著降低趋势;修复10a后,飞机草的盖度、密度、生物量基径分别降低至2.33%、2.67株/m2、0.02 kg/m2、1mm,飞机草入侵得到明显控制。②在植被替代修复过程中,飞机草入侵生境的群落结构得到明显改善,草本层物种多样性呈先升高后降低再升高趋势,草本层盖度在修复3a后显著升高随后显著降低,灌木层和乔木层物种多样性和盖度均呈显著增加趋势。研究显示,替代修复能够有效治理飞机草入侵,促进植物群落的正向演替,提高本地植物群落结构的稳定性,增强生态系统对外来物种入侵的抵抗力。
关键词:  外来入侵物种  飞机草  替代修复  群落结构
DOI:
分类号:
基金项目:国家自然科学基金项目;国家重点研发计划项目
Effects of Different Replacement Restoration Years on the Population of Chromolaena odorata and Plant Community StructureZHU Jinfang, LI Junsheng, ZHAO Caiyun, LIU Xiaoyan, LI Feifei
,et al
Abstract:
To investigate replacement restoration on the control of C. odorata and native plant community structure, the habitats invaded by C. odorata in karst area of Guangxi were taken as the research object. The dynamics of characteristics of C. odorata population and plant community structure were analyzed by using space instead of time. The results showed that: (1) The density, coverage, base diameter and biomass of C. odorata decreased significantly with the increase of restoration years, and decreased to 2.33%、2.67 ind/m2、0.02 kg/m2、1mm, respectively. The invasion of C. odorata was obviously controlled. (2) The community structure of the habitats invaded by C. odorata was significantly improved during the process of plant replacement restoration. The species diversity of herbaceous layer increased first, then decreased and then increased again. The coverage of herbaceous layer increased significantly in 3 years of restoration and then significantly decreased with the increase of restoration years. The species diversity and coverage of shrub and tree layers were all increased significantly during the process of restoration. The study showed that replacement restoration could effectively control the invasion of C. odorata, improved the stability of native plant community structure, promoted the positive succession of plant community, and strengthened the resistance of ecosystem to the invasion of alien species.
Key words:  alien invasive species  Chromolaena odorata  replacement restoration  community structure