河南宝天曼化香林特征及物种多样性

根据10块样地的野外调查材料,对河南宝天曼化香林的土壤性质、植物区系成分、群落外貌、群落结构以及物种多样性特征进行了初步分析。结果表明:(1)化香林土壤较贫瘠,区系组成较丰富,其属的分布类型以温带性质的属最多,热带性质的属也占一定比例;(2)化香林的生活型以高位芽为主,叶级谱中以中型叶为主;(3)化香林的垂直结构可分为乔木层、灌木层、草本层,亦有少量的层间植物;(4)化香林的优势种显著,群落物种的丰富度、多样性、均匀度指数的总趋势为灌木层>草本层>乔木层,但在海拔梯度上的分布并未表现出明显的规律性。

Community Structure and Species Diversity of Platycarya Strobilacea Forest in Baotianman, Henan Province

According to the investigation data from 10 typical sampling plots in Baotianman, Henan Province, soil properties, flora, community appearance and structure, and plant species diversity ofPlatycarya strobilacea community were studied.The results shown that (1) the soil was infertile, but the flora was plentiful,the tem- perate genus was the main genus and it was more than the tropic genus in the distribution area; (2) the commu- nity forest displayed more deciduous plants with the types of phanerophytes, hemicryptophytes than that of chamaephytes and geophyte, and the moderate size leaf was dominant leaf in the leaf size table; (3) the commu- nity vertical structure could be divided into tree layer, shrub layer and herb layer, and it also had some interstra- tum plants;(4) there were outstanding dominant species in the community and the trend of plant species rich- ness index, diversity index and evenness index followed the pattern of shrub layer > herb layer > tree layer, but no pattern was found in altitude gradient.The pattern along altitude gradient not only related to altitnde,but also related to other environmental factors,such as :slope,soil type.