【摘要】 【目的】了解森林群落稳定状态及影响群落稳定性的主要因子,为自然保护区植被的经营管护提供科学依据,也为后续其他科研活动提供基础资料.【方法】从物种多样性、土壤肥力、林地生产力、优势种更新能力、恢复力、森林灾害6个方面建立其稳定性评价指标体系,运用隶属函数法对3种森林群落的稳定性进行评价.【结果】隶属函数法结果表明,枫香群落的土壤肥力、林地生产力、恢复力最高和森林灾害较小,稳定性也最高;原始栎类群落物种多样性、优势种更新能力最高,稳定性排在第二;次生栎类群落6个方面均较低,稳定性最小,枫香群落、原始栎类群落与次生栎类群落之间有显著差异(P<0.05).【结论】3种群落的稳定性表现为枫香群落>原始栎类群落>次生栎类群落,多样性可以促进稳定性,并没有明确的比例关系;毛管孔隙、总体simpson、乔木蓄积量、腐殖质厚度是影响3种森林群落稳定性的关键因子.更多还原

【Abstract】 【Objective】 The study aimed to understand the stability of forest community and the main factors affecting its stability, providing a scientific basis for the management and protection of vegetation in nature reserves, and the basic data for other related research.【Method】 The evaluation system of community stability was established by measuring six indices as following: species diversity, soil fertility, forest land productivity, renewal ability of dominant population, resilience, and forest disasters.The method of membership function was used to evaluate the stability of the three forest communities.【Result】 Through the analysis with the membership function method, it was showed that Liquidambar formosana community has the highest soil fertility, woodland productivity and resilience ability, and the lowest level of forest disasters, and accordingly has the highest stability.The original oak community had the highest species diversity and the renewal capacity of dominant species, ranked in the second in stability.The secondary oak community was the lowest in the six aspects, and so was its stability.There existed significant difference in the stability among the three forest communities(P<0.05).【Conclusion】 The stability of the three communities was ranked in descending order as following: Liquidambar formosana community, Primitive oak community, and secondary oak community.The species diversity could promote the stability, but there was no clear proportional relationship between them.The capillary porosity, overall simpson, tree volume, and humus thickness were the key factors affecting the stability of the three forest communities.更多还原