马陵山森林公园森林群落类型及物种多样性分析

采用典型样地取样法,对新沂市马陵山森林公园的不同植被类型进行调查.结果显示：马陵山森林公园共有种子植物298种,隶属于106科246属;依据优势种组成,公园植被可分为5个群落类型：赤松刺槐群落、构树群落、侧柏群落、麻栎侧柏群落、竹林群落;不同群落类型间物种丰富度、多样性指数有一定差异,构树群落的丰富度指数、Simpson指数（D）、Shannon-Wiener指数（H＇）普遍较高;侧柏、竹林群落的丰富度低,多样性指标不高,呈现组成单调、层次简单、长势不良的特点.建议因地制宜地采取林分改造措施,提高各森林群落的稳定性.

Analysis on Forest Community Types and Species Diversity in Malingshan Mount Forest Park

A systematic vegetation survey was conducted in Malingshan Mount Forest Park in Xinyi Municipality of Jiangsu Province by means of the typical plot sampling method.The results showed that there were 298 species of seed plants,belonging to 246 genera of 106 families.5 types of forest communities were divided according to the composition of dominant species,i.e.,Pinus densiflora × Robinia pseudoacacia community,Broussonetia papyrifera community,Placladus orientalis plantation community,Quercus acutissima × Platycladus orientalis community,and bamboo forest community.There were certain differences inspecies richness and species diversity among the plant communities.The values of Simpson index （D） and Shannon-Wiener index （H＇） of Broussonetia papyrifera forest community were higher than those of other communities.The indexes of species richness,species diversity of Placladus orientalis plantation community and bamboo plantation were lower,which showed the characteristics of simple composition,simple structure,and poor growth status.Some suggestions were put forward for stand transformation according to the local conditions in order to improve the stability of the forest communities.