沙地植物群落功能多样性对物种多样性的影响

Effects of Functional Diversity on Species Diversity of Plant Communities in Sandy Land

功能多样性作为生物多样性的一个组分,它主要反映群落中物种间功能的差异程度,它是独立的,与传统生物多样性之间相互作用相互影响.为探讨沙地植物群落功能多样性对物种多样性的影响,调查了宁夏哈巴湖国家级自然保护区沙化封禁区37个群落的物种多样性,测定分析了每一个群落中各植物的C、N、P含量,计算了物种多样性和功能多样性.结果表明,物种多样性Shannon-Wiener指数Simpson指数与功能均匀度和功能多样性Rao's二次熵指数之间有极显著的正相关关系,随功能均匀度指数和功能多样性指数的增大,物种多样性呈幂函数形式增大,但物种多样性与功能分歧度之间没有显著的相关关系.这表明,功能多样性能够影响群落的物种多样性.

Functional diversity is a crucial concept in the biodiversity,with the continuous deepening of biodiversity research,functional diversity has attracted more and more attention from ecologists and has become a hot issue in current ecological research.The essence of functional diversity is the difference in functional traits among species within the community.Species diversity,as the core of traditional biodiversity,has an important connection with the species functional traits.To explore the effects of functional diversity on plant species diversity in sandy lands,we investigated the species diversity of 37 communities in the sandy ecosystem of the Ningxia Habahu National Nature Reserve,and measured the C,N and P of each plant in each community,species diversity and functional diversity were calculated.Our results show that,functional evenness and functional diversity indices(Rao’s quadratic entropy index)have a significant positive correlation with Shannon-wiener index as well as Simpson index,but there was no significant correlation between species diversity and functional divergence.In general,functional diversity can affect the species diversity of plant communities.