摘要
运用α多样性测度公式,探讨了不同干扰方式(Ⅰ.天然次生林、Ⅱ.择伐天然林种植木麻黄、Ⅲ.皆伐天然林种植木麻黄后实施保护、Ⅳ.皆伐天然林种植木麻黄后频繁干扰)对福建东山岛沙质海岸带植物群落的影响。结果表明,随着干扰强度和频度的增大,样地内科、属、种数均表现出先升高后降低的趋势;乔木层物种多样性和均匀度随着干扰强度和频率的增大逐渐降低,优势度逐渐升高,其余各层物种多样性先升高后降低。择伐干扰群落的林下物种多样性都不同程度地高于天然次生林,但与其它干扰方式相比,其与天然次生林具有较高的群落间相似度,干扰强度与频率是造成生态系统退化的主要原因。通过适度干扰,实现地带性植被与木麻黄的合理混交,可维持沿海防护林体系较高的物种多样性和稳定性,增加群落季相变化,研究结果为构建稳定型的沿海防护林体系提供了基础资料。
Based on α diversity index,the effects of different patterns of disturbance（Ⅰ： secondary forest,Ⅱ： planting Casuarina equisetifolia after selective cutting the secondary forest,Ⅲ： planting C.equisetifolia after clear cutting the secondary forest then protect to now,Ⅳ： planting C.equisetifolia after clear cutting the secondary forest then disturb the undergrowth frequently） of plants on sandy coast were analyzed.The results showed that with the increase of intensity and frequency of disturbance,the number of families and genera in communities increased at first and then downward,the species diversity and evenness in tree layer gradually reduced,and the dominance raised gradually,species diversity in other layers declined at first and then raised,the species diversity of undergrowth in community Ⅱ was higher than community Ⅰ,but keep higher similarity with natural community compared with other patterns of disturbance,The intensity and frequency of disturbance were the main cause of ecosystem degradation.It can maintain higher species diversity and community stability in coastal protection forest by building mixed forest with the use of indigenous plant and C.equisetifolia under moderate disturbance,and increase the season changes of community,these results provided basic materials for building a stable coastal protection forest system.
出处
《福建林学院学报》
CSCD
北大核心
2011年第3期227-233,共7页
Journal of Fujian College of Forestry
基金
国家"十一五"科技支撑计划专题项目(2009BADB2B0302)
福建省科技重点计划项目(2008N0002)
国家林业局南方山地用材林培育重点实验室
福建省森林培育与林产品加工利用重点实验室资助项目
关键词
沙质海岸带
不同干扰方式
垂直结构
物种多样性
sandy coast
different pattern of disturbance
vertical structure
species diversity
