论文部分内容阅读
群落结构多样性的研究可以为实施更加有效的生物多样性监测、保护与持续利用提供科学依据。采用扩展形式的Shannon指数和基于方差的结构多样性指数(STVI)对山西省翅果油树群落进行了结构多样性研究。结果表明:两个结构多样性指数表现出较为一致的变化趋势,均可反映山西翅果油树群落的结构多样性差异;群落类型、物种组成、空间结构,以及生境条件、环境因子和人为干扰强度等是影响翅果油树群落结构多样性的主要因素;STVI结构多样性指数克服了在计算多样性时将直径和高度划分等级时的主观性,并且能更好地描述一个较大的结构序列,因此运用价值更大。
The study on the diversity of community structure can provide a scientific basis for the implementation of more effective monitoring, protection and sustainable use of biodiversity. The Shannon index and the variance-based structural diversity index (STVI) were used to study the structural diversity of the oil samara community in Shanxi Province. The results showed that the two structure diversity indices showed a consistent trend of change, and all of them could reflect the differences in the structural diversity of the oil palm community. The community types, species composition, spatial structure, habitat conditions, environmental factors and human disturbance Strength and so on are the main factors affecting the diversity of the structure of the tree. The diversity index of STVI overcomes the subjectivity of dividing the diameter and the height in the calculation of diversity, and can better describe a larger structure Sequence, so the use of more value.