毛竹-桫椤群丛的种间关系与群落稳定性

Interspecific Relationships and Community Stability of Alsophila spinulosa Phyllostachys edulis Clusters

摘要:

种间关系是植物群落重要的数量与结构特征之一，直接影响群落的稳定性，探究种间关系与群落稳定性对于植物种群的保护和稳定性维持具有重要意义。以贵州省赤水桫椤国家级自然保护区内的桫椤群落为研究对象，采用样方法对桫椤(Alsophila spinulosa)群落进行调查，分析植物总体关联性、种间相关性并计算群落的稳定性系数。结果表明，毛竹(Phyllostachys edulis)在群落中占绝对优势，毛竹与桫椤的种间关系表现为显著正相关；桫椤在发育前期受到物种间的影响较大，而在发育的后期处于相对独立的状态，与物种间的关系表现为弱相关或不相关，受到物种间的影响较小；贡献定律法分析表明毛竹-桫椤群落的稳定性系数为21/79，说明金沙沟区域的毛竹-桫椤群落处于稳定状态。

Abstract:

The interspecific relationship is one of the important quantitative and structural characteristics of plant communities, which directly affects the stability of communities, and it is of great significance to study the interspecific relationship and community stability for the protection and stability of plant population. Alsophila spinulosa community in Chishui National Nature Reserve of Guizhou Province was investigated by means of sample method, and the overall correlation and interspecific correlation of plants were analyzed and the stability coefficient of the community was calculated. The results showed that Phyllostachys edulis was dominant species in the community, and the interspecific relationship between P. edulis and A. spinulosa showed a significant positive correlation. Alsophila spinulosa was greatly affected by interspecies at the early development stage, but was relatively independent state at the late development stage, showing weak or no correlation with other species, and was less affected by interspecies. The contribution law analysis showed that the stability coefficient of P. edulis-A. spinulosa community was 21/79, indicating that the community was stable in Jinshagou area.