茂名森林公园人工林群落林下物种多样性分析

Analysis on Species Diversity under Plantation Community of Maoming Forest Park

对茂名森林公园人工林群落进行典型样地调查,结果表明:公园内人工林群落共有植物64种34科55属,其中蕨类植物10种7科8属、裸子植物1种1科1属、双子叶植物48种24科41属、单子叶植物5种2科5属.园内人工林灌木层物种组成以桃金娘、九节、银柴、大青、白背叶、鬼灯笼、酸藤果、土密树为主;草本层植物主要有芒萁、蔓生莠竹、飞机草、弓果黍等10种.不同人工林群落林下物种在丰富度和Shannon-Wiener指数方面均表现为灌木层>草本层,但均匀度表现不一.3个多样性指数的变化趋势表现为Shannon-Wienner指数与均匀度指数呈正相关,而两者与丰富度指数呈负相关.

The result of typical sampling survey of plantation community in Maoming forest park revealed that there were 64 species,belonging to 55 genera and 34 families,in which there were 10 Pteridophytes belonging to 8 genera and 7 families,48 Dicotyledon belonging to 41 genera and 24 families and 5 Monocotyledon to 5 genera and 3 families.In addition,the predominant plants of Shrub Layer in the plant communities were Rhodomyrtus tomentosa,Psychotra rubra,Aprorosa dioica,Clerodendron cyrtophyllum,Mallotus apella,Clerodendron fortunatum,Embelia laeta,Bridelia tomentosa,while those of Herbaceous Layer were Dicranopteris dichotoma,Microstegium vagans,Eupatorium odoratum,Cyrtococcum patens,et al.The Richness and Shannon-wiener index of shrub layer were higher than those of herbaceous layer in different artificial communities,but the evenness was not the same.Shannon-Wiene index has a positive relationship with Evenness index,and these two indexes had a negative relationship with Species Richness Index.