山东五莲山植物群落结构及物种多样性

五莲山自然保护区地处鲁东南沿海地区，为全面了解其群落结构组成及物种多样性，作者进行了野外调查，共获得11个标准样方，面积6 600 m²。样方内记录到高等植物52科141种。该保护区地带性植被为常绿—落叶针阔叶天然次生混交林、落叶阔叶林，主要森林植被为赤松—板栗群落(Pinus densiflora-Castanea mollissima community)、麻栎—赤松群落(Quercus acutissima-Pinus densiflora community)、赤松—杜鹃群落（P. densiflora-Rhododendron simsii community）、麻栎—杜鹃群落(Q. acutissima-Rhododendron simsii community)。样方数据显示该区域木本植物种类不是很丰富，但植物群落结构复杂，具有明显的生境异质性，其多样性指数乔木层＜木本层＜灌木层。作者认为影响该保护区核心区多样性的最显著特征应该为海拔和坡度，而人为干扰会严重影响外围保护区植被类型及其物种多样性。整体上看，本区域正处于群落演替早期，种间竞争尚不充分，物种多样性偏低。

Community Structure and Species Diversity in Wulian Mountain of Shandong

Mountain Wulian Nature Reserve is located in the southeast coastal region of Shandong Province，to fully understand their community structure and species diversity，the author conducted a field survey，and obtained 11 standard samples，whose total area is 6 600 m2. In samples，the author recorded 141 higher plants，belonging to 52 families.Regional vegetation in this Nature Reserve is evergreen conifer woods-deciduous broadleaverd forest，and deciduous broadleaverd forest，the main forest vegetation is Pinus densiflora-Castanea mollissima community，Quercus acutissima-Pinus densiflora community，P. densiflora-Rhododendron simsii community，Q. acutissima-Rhododendron simsii community.Sample data displays this region xylophyte type is not very rich，but the community structure is complex with obvious environment heterogeneity，indicating tree layer diversity index＜woody layer diversity index＜shrub layer diversity index.The author thinks what affects the diversity of the Wulian core protection areas most is elevation and slope，and the external protection of human interference would seriously affect the vegetation types and species diversity.Overall，the region is in early successional communities，interspecific competition is not sufficient，and the species diversity is low.